TW201910633A - Wind farm control system and wind farm control method - Google Patents

Abstract

Provided is a wind farm control system wherein the operating efficiency of the wind farm can be improved and the amount of power that is generated can be increased when there are momentary abrupt fluctuations in the wind direction. This wind farm control system 1 has a wind farm 100 comprising a plurality of wind power generation devices 2 having a rotor for rotating at least due to wind, a nacelle 22, a tower 21 for rotatably supporting the nacelle 22, and a control device 31. Among the plurality of wind power generation devices 2 installed in the wind farm 100, a determination is made regarding whether a yaw angle error, which is determined by at least a wind direction measurement value and a yaw angle measurement value transmitted by the control device 31 of one wind power generation device 2 for which an abrupt fluctuation in the wind direction has been detected, is equal to or less than a prescribed first threshold value during a prescribed period, and on the basis of the determination result, a command value, which includes a yaw angle or a change in the prescribed first threshold value of the other wind power generation devices 2, is transmitted to the control device 31 of the other wind power generation devices 2.

Description

Wind power plant control system and control method of wind power plant

The present invention relates to a control system for a wind power plant having a plurality of wind power generators, and particularly relates to a wind power plant control operation in a wind power plant even in the case of a sudden change in wind direction. System and control methods for wind power plants.

In the long-term, we are worried about the depletion of fossil fuels such as oil, and in order to cope with the warming of the global environment, the reduction of CO ₂ emissions has become a top priority for the world. In order to solve these problems, as a method of not using fossil fuels and generating CO ₂ power generation, power generation using natural energy such as solar power generation or wind power generation is rapidly progressing in the world. Along with this, a wind power plant group (hereinafter referred to as a wind power plant) including two or more wind power generators is also increasing. As the introduction amount of the wind power generation device increases and the task as a basic power source is pursued, it is desired to increase the amount of generated electric power under the entire wind power plant. For this reason, the wind turbine generator performs the yaw angle control (active yaw control) in which the direction of the rotor surface faces the wind direction, and increases the amount of generated electric power. For example, in Patent Document 1, it is proposed to prevent a wind power plant from being sent to a wind power generator in a wind power plant when a detection unit in a wind power plant senses a risk element of the external environment. The failure of the overall system is prior to the technology. Furthermore, in Patent Document 1, it is described that when the risk element of the external environment changes in accordance with the wind direction of the remote local area, the deflection system of each wind power generator is controlled, and the direction of the nacelle is rotated so that the front position of the nacelle is oriented. The gist of the changed wind direction (active sway control). [Prior Technical Literature] [Patent Literature]

[Patent Document 1] Japanese Patent Laid-Open Publication No. 2015-127528

[Questions to be solved by the invention]

When the wind speed changes rapidly after the low air pressure passes, the active yaw control will not be able to follow, and the wind power load from the rapidly changing wind direction is used to protect the wind power generation device, and the protection function for stopping the wind power generation device is mounted on the wind power generation device. . However, the wind direction often changes due to the disturbance of the wind, and it is difficult to distinguish the rapid change of the wind direction and the change of the initial wind direction in a short time. When the wind power generator is stopped due to the change in the wind direction, the work ratio of the wind power generator decreases, and the amount of generated power decreases. Furthermore, if other wind power generation devices in the wind power plant are stopped due to the same wind direction fluctuation, the overall operating ratio of the wind power plant will be reduced. In the configuration described in the patent document 1, it is assumed that there is a moment of sudden change in the wind direction (returning to the initial wind direction in a short period of time), and if it is determined that the active yaw control is difficult to cope with, it is originally When other wind power generation devices in the wind power plant are operational, all of the wind power generation devices in the wind power plant are stopped, and the power generation efficiency is lowered.

Here, the present invention provides a wind power plant control system and a control method for a wind power plant, which can increase the amount of generated electric power by increasing the work ratio in the wind power plant when the sudden change in the wind direction is instantaneous. [Means for solving the problem]

In order to solve the above problems, the wind power plant control system according to the present invention has a wind power plant having a plurality of wind power generation devices, the wind power generation device having at least a rotor that rotates by wind, a nacelle, and the support of the nacelle a tower that can be rotated by a pendulum swing, and a control device; wherein: the plurality of wind power generators installed in the wind power plant are configured to transmit at least one control device of the wind power generator that detects a rapid change of the wind direction The sway angle error obtained from the wind direction measurement value and the sway angle measurement value is determined to be within a specific first threshold within a specific period, and the specific number including the other wind power generation device is included based on the determination result. The change of the threshold value or the command value of the sway angle is transmitted to the control device of the other wind power generator described above. Further, in the method of controlling a wind power plant according to the present invention, the wind power plant includes a plurality of wind power generators having at least a rotor that is rotated by the wind, a nacelle, and a tower that supports the nacelle to be swingable. And a control device; wherein the plurality of wind power generators installed in the wind power plant are configured to transmit at least a wind direction measurement value and a yaw from a control device of the wind power generator that detects a rapid change in the wind direction The sway angle error obtained by the angular measurement value is determined to be within a specific first threshold value within a specific period, and the specific first threshold value including the other wind power generation device is changed or leveled based on the determination result. The command value of the swing angle is transmitted to the control device of the other wind power generator described above. [Effect of the invention]

According to the present invention, it is possible to provide a wind power plant control system and a control method for a wind power plant, which can increase the amount of generated electric power by increasing the work ratio in the wind power plant when the sudden change in the wind direction is instantaneous. The above external problems, configurations, and effects are explained by the following description of the embodiments.

In the present specification, the wind power generators installed in the wind power plant as the wind power plant control system according to the embodiment of the present invention are described as an example of the downwind type wind power generator, but the same can be applied. In an upwind wind power plant. Further, the wind power plant constituting the wind power plant control system according to the embodiment of the present invention may be installed at any place on the sea, the mountain portion, and the plain portion. Hereinafter, embodiments suitable for carrying out the invention will be described using the drawings. In addition, the following is an example of implementation, and the gist of the invention is not intended to limit the application of the present invention to the following specific aspects. [Example 1]

Fig. 1 is a schematic overall configuration diagram of a wind power plant control system according to a first embodiment of the present invention. As shown in Fig. 1, the wind power plant control system 1 includes a wind power plant 100 provided with a wind power generator 2 including a plurality of seats of the wind power generator 2a and the wind power generator 2b, and a control device 31 (31a, 31b). It is installed in each wind power generator, and is given a sway angle command or a torque command. The overall control device 10 collects the operation/stop state of the wind power generator 2, the wind direction/wind speed measurement value, and the swing angle. And transmitting a yaw angle control command or a torque upper limit value to each control device 31; and a communication network 5 connecting the plurality of control devices 31 and each control device 31 with the overall control device 10 Can communicate with each other. Here, the communication network 5 is not wired or wireless. Further, in the example shown in FIG. 1, it is assumed that the wind 20 indicated by the black-framed arrow is generated, and the wind power generator provided in the plurality of seats in the wind power plant 100 is displayed, and the wind power generator 2a is positioned at the top. On the wind side, the other wind power generator 2 including the wind power generator 2b is located on the leeward side. In the case of the specific wind power generator, the wind power generator 2a positioned on the windward side and the wind power generator 2b positioned on the leeward side and the wind power generator 2a installed on the windward side are shown below. The internal control device 31a and the control device 31b provided in the wind power generator 2b positioned on the leeward side. Further, when any wind power generation device installed in the wind power plant 100 or all of the wind power generation devices is shown, the wind power generation device 2 and the control device 31 installed in the wind power generation device 2 are expressed.

Here, the configuration of the plurality of wind power generators 2 installed in the wind power plant 100 will be described. FIG. 2 is a view showing a schematic configuration of the wind power generator 2 installed in the wind power plant 100 in the wind power plant control system 1 shown in FIG. 1. In FIG. 2, for convenience of explanation, only the configuration of one wind turbine generator 2 is shown. However, the wind power generator 2 provided in the other plurality of seats in the wind power plant 100 has the same configuration. As shown in Fig. 2, the wind turbine generator 2 includes a blade 24 that is rotated by the wind, a hub 23 that supports the blade 24, a nacelle 22, and a support nacelle 22 that can be rotated to the dynamic tower 21. In the nacelle 22, there is provided a main shaft 25 connected to the hub 23 and rotating together with the hub 23, a shrink disk 26 coupled to the main shaft 25, a speed increaser 27 connected to the main shaft 25 through the shrink disk 26 and increasing the rotational speed, and The generator 28 is rotated by the rotation speed of the speed increaser 27 to rotate the rotor to perform the power generation operation. The portion where the rotational energy of the blade 24 is transmitted to the generator 28 is referred to as a power transmission portion. In the present embodiment, the main shaft 25, the contraction disk 26, and the speed increaser 27 are incorporated into the power transmission portion. Next, the speed increaser 27 and the generator 28 are held by the main frame 29. Further, the rotor is constituted by the vane 24 and the hub 23. As shown in FIG. 2, a power converter 30 that converts the frequency of electric power, a switch for switching a current switch, a transformer (not shown), and a control device 31 are disposed at the bottom (lower portion) in the tower 21. Wait.

As the control device 31, for example, a control panel or SCADA (Supervisory Control And Data Acquisition) is used. In the present embodiment, an example in which the rotor is constituted by the three blades 24 and the hub 23 is shown. However, the present invention is not limited thereto, and the rotor may be configured by a hub and at least one blade 24.

The sensor 4 provided in the wind turbine generator 2 includes, for example, a pitch angle sensor 4a provided at the root of the blade 24 and measuring the pitch angle of the blade 24, and measuring the strain feeling of the stress applied to the blade 24. The damper 4b, the wind direction anemometer 4c provided at the upper portion of the nacelle 22, and the yaw angle sensor 4d for measuring the azimuth of the nacelle 22. Further, although not shown, the sensor 4 provided in the wind turbine generator 2 includes, for example, a thermometer that is provided on the upper portion of the nacelle 22 and that measures the temperature of the outside air, a thermometer that measures the temperature in the nacelle 22, and A hygrometer that measures the humidity within the nacelle 22. Furthermore, a sensor including a rotational speed of the generator 28 and a power generation amount, which are not shown, is included. Furthermore, it is not limited to the configuration in which all of the above-described sensors are provided.

The control device 31 (for example, SCADA) transmits signals from the above-described pitch angle sensor 4a, strain sensor 4b, wind direction anemometer 4c, yaw angle sensor 4d, and various sensors 4 described above. The line obtains the measurement data, and according to the obtained measurement data, the pitch angle, the azimuth of the nacelle (the swing angle command), the rotational speed of the generator, and the like are appropriately controlled, and the obtained measurement data is transmitted through the communication network 5, For example, it is transmitted to the server 7 provided in the operation management center 3. Further, in the operation management center 3, an electronic terminal 6 connected to the server 7 to be communicable is provided. For example, the server 7 functions as the overall control device 10 shown in FIG. Further, the control device 31 (for example, SCADA) transmits the acquired measurement data to the control device 31 installed in the other wind power generation device 2 of the wind power plant 100 shown in Fig. 1 via the communication network 5.

Fig. 3 is a block diagram showing the function of the overall control device 10 shown in Fig. 1. As shown in FIG. 3, the overall control device 10 is configured by the yaw angle error abnormal value determining unit 11, whether or not the control determining unit 12, the command value determining unit 13, and the load fatigue calculating unit 14 are required. The sway angle error abnormal value determining unit 11 and the control determining unit 12, the command value determining unit 13, and the load fatigue calculating unit 14 are stored by, for example, a processor such as a CPU (Central Processing Unit) (not shown). A ROM of various programs, a RAM for temporarily storing data of a calculation process, a memory device such as an external memory device, and the like, and a processor such as a CPU reads and executes various programs stored in the ROM, and the execution result is also a calculation result. Memory to RAM or external memory device. Further, in FIG. 3, each function is indicated by a square. These are the programs that realize the functions described later by using a program, and can be used as separate programs or as a program that combines all or a plurality of functions. It is stored in a memory unit not shown.

The oscillating angle error abnormal value determining unit 11 receives the operation of the wind power generating device 2 transmitted from the input signal line group 15 through the communication network 5 and transmitted from the respective control devices 31 (for example, SCADA) shown in FIGS. 1 and 2 . The stop information, the wind direction measurement value measured by the wind direction anemometer 4c, the flat swing angle measurement value measured by the yaw angle sensor 4d, and the like. The sway angle error abnormal value determining unit 11 determines that the difference between the wind direction measurement value and the yaw angle measurement value of the stopped wind power generator 2 is even when there is a wind power generation device 2 whose operation has stopped. Whether the value of the swing angle error exceeds a certain threshold. Further, here, the yaw angle error is obtained by the control device 31 (for example, SCADA) provided in each of the wind power generators 2, and is used as the wind direction measurement value measured by the wind direction anemometer 4c and the tiling angle. The difference between the measured values of the yaw angle measured by the angle sensor 4d. The obtained yaw angle error is received by the sway angle error abnormal value determining unit 11 through the communication network 5 and the input signal line group 15 described above.

Is it necessary to control the determination unit 12 to determine that the stopped wind turbine generator 2 is because the result of the determination by the yaw angle error abnormal value determining unit 11 is that the value of the yaw angle error does not exceed a specific threshold value? The rapid change of the wind direction stopped. Then, the control determination unit 12 determines whether or not the other wind power generators 2 in the wind power plant 100 are generated by using the load fatigue calculation unit 14 from the measured values of the wind direction and the wind speed measured by the wind direction anemometer 4c. The possibility of fatigue. For example, as shown in FIG. 2, in the case of the strain sensor 4b which measures the stress applied to the blade 24, the load fatigue calculation unit 14 converts the amount of deformation measured by the strain sensor 4b into a load, and determines Whether other wind power generators 2 in the wind power plant 100 have the possibility of generating fatigue. Further, when the strain sensor 4b is not provided, the load fatigue calculation unit 14 further measures the wind direction and the wind speed measured by the wind direction anemometer 4c and the received yaw angle error. The change of the set file (time series data of the wind direction change) determines whether or not the other wind power generators 2 in the wind power plant 100 are likely to be fatigued. Whether or not damage due to fatigue occurs is determined, for example, according to the specifications of the wind power generator 2. Moreover, known algorithms can be used for the calculation of load fatigue.

The command value determination unit 13 determines the wind direction measured by the wind direction anemometer 4c when it is determined by the necessity of the control determination unit 12 that the other wind power generators 2 in the wind power plant 100 are likely to be fatigued. And the measured value of the wind speed, using the load fatigue calculation unit 14, using the control method of the other wind power generator 2 in the wind power plant 100, that is, calculating the command values of the sway angle, the pitch angle, the generator torque, etc. The command values of the calculated sway angle, pitch angle, generator torque, and the like are transmitted to the corresponding control devices 31 through the output signal line group 16 and the communication network 5.

FIG. 4 is a graph showing an example of a determination criterion for determining whether or not the control unit 12 needs to be controlled in the overall control device 10 shown in FIG. 3 . The graph shows the operation stop state and the wind speed of the wind power generator 2a transmitted from the control unit 31a (FIG. 1) of the wind power generator 2a positioned at the most windward side through the communication network 5 and the input signal line group 15, respectively. Time variation (time history variation) of wind direction, and sway angle error. Bias level wind turbine generator 2a of the swing angle of the wind direction i.e. yaw angle error exceeds a certain threshold value ₁ that is a first threshold value Th1 t at a time, after this, there is shown the case of wind turbine generator 2a stopped. Once the wind power generator is stopped, it will continue for a certain period of time and then restart. In other words, it takes a certain amount of time for the wind power generator to be temporarily stopped until it is operated again (restart). As shown in the graph of the time variation (time history change) of the sway angle error of FIG. 4, the yaw angle error transmitted from the control device 31a within a certain time Δt is lower than a certain threshold value, that is, the first threshold value Th1. In this case, it is determined that there is no change in the wind direction that is not necessary to stop, in other words, it is determined that the instantaneous wind direction changes, and the threshold value of the yaw angle error of the other wind power generators 2 in the wind power plant 100 is increased and corrected. Here, it is important to determine whether or not the rapid change in the wind direction is instantaneous or continuous within the specific time Δt(t _{2 -} t ₁ ). For example, it is preferable to set the damage or the damage of the rotor constituting the wind power generator 2 due to the above-described load being overloaded, based on the actual data of the past or the specification (design value) of the wind power generator 2 or the like. Within the scope. Therefore, when the sway angle error within the specific time Δt is lower than the specific threshold value, that is, the first threshold value Th1, the other wind power generators 2 can be continuously operated by the yaw angle control without stopping the other wind power generators 2.

FIG. 5 is a graph showing an example of a case where the threshold value of the yaw angle error of the wind power generator of the present embodiment is changed to be high. In other words, when it is determined whether or not the control unit 12 is required to control the entire control device 10, the other wind power generators 2 in the wind power plant 100 are, for example, the wind power generators 2b positioned on the leeward side. A graph of one of the examples when the threshold value of the sway angle error transmitted by the control device 31b (FIG. 1) is changed to be high. In the wind turbine generator 2b, the first threshold value Th1' after the change from the specific threshold value of the yaw angle error, that is, the first threshold value Th1 is changed, thereby causing a rapid change in the wind direction caused by the time t ₂ . The sway angle error does not exceed the first threshold value Th1' after the change, and the operation can be continued without stopping the wind power generator 2b on the leeward side. Further, in FIG. 5, the time when the specific threshold value of the sway angle error is changed to the changed first threshold value Th1' is t ₂ , as shown in FIG. 1 , and the wind power generation device installed in the wind power plant 100 The time t ₂ at which the position is generated corresponding to the delay (control delay: delay from the received signal), and the control device 31b (for example, SCADA) of the wind power generator 2b positioned at the leeward side starts the error from the flat swing angle. The specific threshold value is a case where the first threshold value Th1 is changed to the control of the sway angle of the first threshold value Th1' after the change. That is, the delay in the time variation (time-course variation) of the sway angle error caused by FIG. 4 and FIG. 5 is the wind force located on the most windward side in the wind power generator 2 installed in the wind power plant 100. The control device 31a (for example, SCADA) of the power generator 2a calculates the time change (time-lapse change) of the sway angle error shown in FIG. On the other hand, the time change (time-course change) of the sway angle error shown in FIG. 5 is based on the wind power generator 2 installed in the wind power plant 100, and the control device 31b of the wind power generator 2b positioned on the leeward side (for example, SCADA), the person who performed the calculation. Therefore, the delay due to the installation position in the wind power plant 100 including the wind power generator 2 and the control delay are graphs showing temporal changes in the sway angle error as shown in FIG. 5. Further, the specific threshold value of the sway angle error, that is, the first threshold value Th1 is a design value, and can be appropriately set, for example, in the range of 20 to 30. Further, the first threshold value Th1' after the change is set to 45, for example. Further, the specific threshold value of the sway angle error, that is, the first threshold value Th1 and the changed first threshold value Th1' are not limited to the above values. As long as it is appropriately set according to the design value of the wind power generator 2 or the specification.

FIG. 6 is a graph showing another example of the determination criteria of whether or not the control unit 12 needs to be controlled in the overall control device 10 shown in FIG. As shown in Fig. 6, similarly to Fig. 4, the wind power generator 2 provided in a plurality of seats installed in the wind power plant 100 is provided in the wind turbine generator 2a of the windward power generating unit 2a (for example, SCADA). The obtained sway angle error exceeds a specific threshold value, that is, the first threshold value Th1, whereby the wind power generator 2a is in a stopped state, but unlike FIG. 4, the yaw angle error is within a specific time Δt. The value is not lower than a specific threshold, that is, the state of the first threshold Th1. In such a case, it is actually determined that the rapid change of the wind direction is generated, in other words, it is determined that the wind direction of the wind power plant 100 is not changed by the instantaneous wind direction fluctuation, and is provided in the other wind power generator 2 in the wind power plant 100. In the other wind power generator 2 including the wind power generator 2b located on the leeward side, the control device 31a of the wind power generator 2a installed on the windward side is provided as the possibility of occurrence of fatigue (for example, The wind direction and the wind speed condition transmitted by the SCADA), the load fatigue calculation unit 14 calculates the swing angle, the pitch angle, the torque command value, and the like that the other wind power generators 2 including the wind power generator 2b positioned on the leeward side can continue to operate. conditions of. Then, the obtained condition is transmitted as a command value to the control device 31b of the wind power generator 2b installed at the leeward side and the control of the other wind power generator 2 via the output signal line group 16 and the communication network 5. Device 31.

FIG. 7 is a graph showing an example of a case where the control of the yaw angle of the wind power generator of the present embodiment has been changed. In other words, as shown in Fig. 7, in order to determine whether or not the control unit 12 is required to control the entire control device 10, it is controlled to include the wind on the leeward side including the position provided in the wind power plant 100. The other wind turbine generator 2 of the power generation device 2b changes the graph of one of the swing angles. In the wind power generator 2b positioned on the leeward side, the slewing angle is followed by the wind direction by the control, and the error of the sway does not exceed the specific threshold value, that is, the first threshold Th1, and the wind power generator 2b at the leeward side does not have to stop. , continue to operate. The same applies to other wind power generators 2. Moreover, the sway angle is followed by the wind direction, whereby the fatigue caused by the load can also be prevented.

8 is a view showing an operational state of a plurality of wind power generators in a wind power plant according to a comparative example; and FIG. 9 is a view showing an operation state of a plurality of wind power generators in the wind power plant according to the present embodiment. . In addition, FIG. 8 and FIG. 9 together show the operating state of the plurality of wind power generators in a case where an instantaneous wind direction changes as a condition. In FIG. 8, as a comparative example, the operating states of the wind power generator 2a, the wind power generator 2b1, the wind power generator 2b2, and the wind power generator 2b3 which are installed on the windward side in the conventional wind power plant are shown in time series. . In Fig. 8, at time 00:03, the wind power generator 2a positioned on the windward side is stopped due to the yaw angle error, and thereafter, the same yaw angle error is generated when the wind power generator 2b1 is generated at time 00:04. Further, at time 00:06, the wind turbine generator 2b2 is stopped due to the sway angle error, and at time 00:07, the wind power generator 2b3 is stopped due to the yaw angle error. For this reason, the operating ratio of wind power plants has decreased.

On the other hand, FIG. 9 shows an operation state in the case where the above-described control of the present embodiment is used. When the wind power generator 2a on the windward side is stopped due to the yaw angle error at time 00:03, the configuration is as follows. Whether or not the control unit 12 of the above-described overall control device 10 determines that control is necessary, and changes the specific threshold value of the yaw angle error of the wind power generator 2b1, the wind power generator 2b2, and the wind power generator 2b3, that is, the first threshold Th1. As a result, the wind power generator 2b1, the wind turbine generator 2b2, and the wind turbine generator 2b3 continue to operate without stopping in the same wind direction, and maintain the operating state as the operating state. Through this, the overall operating ratio of the wind power plant can be improved.

Further, in the present embodiment, the configuration in which the overall control device 10 is installed in the server 7 provided in the operation management center 3 having a certain position from the wind power plant 100 has been described, but the present invention is not limited thereto. For example, the control device 31 that mounts the overall control device 10 to each of the wind power generators 2 installed in the wind power plant 100 may be configured. In this case, one control device 31 performs the above-described control as a master, and sends a sway angle to the slave controller, that is, the other control device 31, through the output signal line group 16 and the communication network 5, Command values for pitch angle, generator torque, etc.

As described above, according to the present embodiment, it is possible to provide a wind power plant control system and a control method of the wind power plant, which can increase the operation ratio in the wind power plant in the case where the rapid change of the wind direction is instantaneous, and the power generation can be increased. the amount. Moreover, according to the present embodiment, it is also possible to reduce the fatigue of the rotor or the like constituting the wind power generator. [Embodiment 2]

Fig. 10 is a view showing an overall schematic configuration of a wind power plant control system according to a second embodiment of the embodiment of the present invention. In the present embodiment, the sensor 40 having a plurality of sets of wind speeds, wind directions, and the like provided outside the wind power plant 100 is configured to determine whether the overall control device 10 is required based on the wind speed and the wind direction measured by the sensor 40. The control determination unit 12 performs the processing, which is different from the first embodiment. The same components as those of the first embodiment are denoted by the same reference numerals, and the description overlapping with the first embodiment will be omitted below.

As shown in FIG. 10, the wind power plant control system 1a according to the present embodiment includes a plurality of sensors 40 disposed outside the wind power plant 100 and disposed at positions apart from each other. A plurality of sensors 40 are connected to the overall control device 10 via signal lines, and the measured values of the wind conditions such as the measured wind speed and wind direction are transmitted to the overall control device 10. With such a configuration, the change in the wind speed and the wind direction of the wind 20 can be captured by the sensor 40 before being transmitted to the plurality of wind power generators 2 installed in the wind power plant 100. Whether or not the control unit 12 is required to constitute the overall control device 10 is based on the measured value of the wind direction measured by the plurality of sensors 40 and the sway received from the control device 31 provided in each of the wind power generators 2 In the same manner as in the above-described first embodiment, the wind turbine generator 2 has a sway angle error exceeding a specific threshold value, that is, the first threshold value Th1, and whether the state exceeding the first threshold value Th1 continues for a specific period Δt. In this way, the first threshold value Th1 of the sway angle error of the other wind power generator 2 is changed to the first threshold value Th1' after the change, or the load damper calculation unit 14 calculates the yaw of the other wind power generator 2 For the conditions of the angle, the pitch angle, the torque command, etc., the calculation results, that is, the conditions of the sway angle, the pitch angle, and the torque command are used as command values, and are transmitted to the set by the output signal line group 16 and the communication network 5 The other control device 31 of the wind power generator 2 . In this case, it is necessary for the overall control device 10 to control the determination unit 12, and the first threshold value of the yaw angle error is also applied to the wind turbine generator 2 in which the yaw angle error exceeds a predetermined threshold value, that is, the first threshold value Th1. Th1 is changed to the first threshold Th1' after the change, or the load fatigue calculation unit 14 calculates the conditions such as the swing angle, the pitch angle, and the torque command of the other wind power generators 2, and the calculation result is the swing angle. The conditions such as the pitch angle and the torque command are transmitted as command values to the control device 31 provided in the wind power generator 2 through the output signal line group 16 and the communication network 5.

In the case of the wind direction of the wind 20 as shown in FIG. 10, whether or not the control determination unit 12 is required to be in the windward power generating device 2a on the most windward side has a flat angle error exceeding a specific value as in the first embodiment. The threshold value is the first threshold value Th1, and whether the state exceeding the first threshold value Th1 continues in the specific period Δt, thereby setting the swing angle of the other wind power generator 2 including the wind power generator 2b positioned on the leeward side. The first threshold value Th1 of the error is changed to the first threshold value Th1' after the change, or the load-fatigue calculation unit 14 calculates the swing angle and pitch of the other wind power generator 2 including the wind power generator 2b positioned on the leeward side. Conditions such as an angle and a torque command are transmitted as a command value to the other wind power generator 2 including the wind power generator 2b positioned on the leeward side. Further, for example, when the wind power plant 100 is installed in the mountain portion, depending on the shape of the slope of the mountain portion, the wind 20 that blows the slope from the bottom to the top may be generated. Therefore, in such a case, the wind power generator 2a (the first wind power generator) having the position on the most windward side is not necessarily provided, and the second wind power generation is provided from the number of winds. For example, in the wind turbine generator 2b positioned on the leeward side, the slewing angle error exceeds a specific threshold value, that is, the first threshold Th1, and the state exceeding the first threshold Th1 is continued for a specific period Δt. The first threshold value Th1 of the sway angle error of the other wind turbine generator 2 including the wind turbine generator 2a positioned on the windward side is changed to the first threshold value Th1' after the change, or the load fatigue calculation unit 14 calculates the inclusion The conditions such as the swing angle, the pitch angle, and the torque command of the other wind power generator 2 of the wind power generator 2a on the windward side are sent to the other wind power generation device as a command value. 2.

Different from the first embodiment, the wind turbine generator 2 in which the above-described slewing angle error exceeds a specific threshold value, that is, the first threshold value Th1, is also measured by the wind direction measured by the sensor 40. The difference between the measured values of the yaw angle measured by the angle sensor 4d, that is, the yaw angle error, before actually exceeding a certain threshold value, that is, the first threshold value Th1, can be determined by the overall control device 10 as to whether or not control is required. . Thus, the wind power plant control system 1a according to the present embodiment has a feature that, for example, the specific threshold value of the yaw angle error of the wind power generator 2a itself at the most windward side is also changed, that is, the first threshold Th1. By the oscillating angle or the like, any of the wind power generators 2 in the wind power plant 100 can be stopped without stopping.

Further, in the present embodiment, the configuration in which the overall control device 10 is installed in the server 7 provided in the operation management center 3 having a certain position from the wind power plant 100 has been described, but the present invention is not limited thereto. For example, the control device 31 that mounts the overall control device 10 to each of the wind power generators 2 installed in the wind power plant 100 may be configured. In this case, one control device 31 performs the above-described control as a master, and sends a sway angle to the slave controller, that is, the other control device 31, through the output signal line group 16 and the communication network 5, Command values for pitch angle, generator torque, etc.

According to the present embodiment, in addition to the effect of the first embodiment, even when the fluctuation of the rapid wind direction is instantaneous, it is possible to continue the operation without further stopping all the wind power generation devices installed in the wind power plant, and further improve The ratio of operations in a wind power plant. [Example 3]

Fig. 11 is a view showing an overall schematic configuration of a wind power plant control system according to a third embodiment of the embodiment of the present invention. In the present embodiment, other wind power plants 200 located outside the wind power plant 100, or a solar power generation station (not shown), or other weather information that can measure and obtain wind speed and wind direction are provided. The information is input to the overall control device, and it is different from the first embodiment in order to determine whether or not the overall control device needs to control the determination unit to execute processing based on the input information. In the following, the case where the overall control device needs to control the determination unit to execute the processing based on the information input from the other wind power plants 200 will be described as an example. However, the solar power generation unit (not shown) is used. The other information that can measure and obtain the weather information including the wind speed and the wind direction is input to the overall control device, and it is also the case that the entire control device needs to control the determination unit to execute the processing based on the input information. The same components as those in the first embodiment are denoted by the same reference numerals, and the description overlapping with the first embodiment will be omitted.

As shown in Fig. 11, the wind power plant control system 1b of the present embodiment is provided with an overall control device 10 connected to another wind power plant 200 via a signal line. The overall control device 10 receives the measured values of the wind speed and the wind direction measured by the other wind power plants 200 through the signal line. Further, the wind power plant 100 and the wind power plant 200 are located at positions apart from each other, and the wind conditions are different due to geographical conditions. Therefore, when a measurement value such as a wind speed and a wind direction measured by the wind power plant 200 is used, it is desirable to use another wind power plant 200 located in an environment in which the same wind conditions as the wind power plant 100 exist. The measured value obtained.

Whether or not the control unit 12 is required to constitute the overall control device 10 is based on the measured values of the wind speed and the wind direction measured from the other wind power plants 200, and the wind power generation device installed on the most windward side. The yaw angle error received by the control device 31a of 2a performs processing. Here, is it necessary to control the determination unit 12 to provide a specific threshold value for stopping the operation from the sway angle error received from the control device 31a of the wind power generator 2a provided at the most windward side? The second threshold Th2 in which the threshold Th1 is still low is used, and the second threshold Th2 is used for the determination as to whether or not control is required. Specifically, whether or not the control determination unit 12 is required is a measurement value such as a wind speed and a wind direction measured by another wind power plant 200 obtained through a signal line, and a yaw measured by the yaw angle sensor 4d. When the difference between the angular measurement values, that is, the yaw angle error exceeds the second threshold Th2, it is determined that control is required, and the yaw angle error of the other wind power generator 2 including the wind power generator 2a positioned on the windward side is determined. The first threshold value Th1 is changed to the first threshold value Th1' after the change, or the load-fatigue calculation unit 14 calculates the swing angle and pitch of the other wind power generator 2 including the wind turbine generator 2a positioned on the windward side. The conditions such as the angle and the torque command are transmitted as a command value to the control device 31 of the other wind power generator 2 including the wind power generator 2a positioned on the windward side. In addition, at this time, it is necessary to control the determination unit 12, which is a measurement value by the other wind power plant 200 measured by the signal line, and a measurement value measured by the sway angle sensor 4d. The difference between the yaw angle measurement values, that is, the slewing angle error exceeds the specific threshold value for stopping the operation, that is, when the state of the first threshold value Th1 is continued for the specific period Δt, the command value determining unit 13 transmits the output signal line. The group 16 and the communication network 5 transmit the operation stop command as a command value to the control device 31a of the wind power generator 2a positioned on the most windward side. Thereby, before the wind power generator 2a positioned on the windward side is stopped, the control command can be transmitted to the other wind power generators 2 installed in the wind power plant 100, and the wind power generator 2a positioned on the windward side itself When the second threshold value Th2 is exceeded, the first threshold value Th1 of the sway angle error is changed to the first threshold value Th1' after the change, or the sway angle, the pitch angle, the torque command, or the like is changed. , you can stop running without stopping.

The measurement information of the wind power plant 100 is transmitted to the other wind power plants 200 through the signal line by the overall control device 10, whereby the other wind power plants 200 can perform the wind power plant 100 described above. The same control within the control.

Further, in the present embodiment, the configuration in which the overall control device 10 is installed in the server 7 provided in the operation management center 3 having a certain position from the wind power plant 100 has been described, but the present invention is not limited thereto. For example, the control device 31 that mounts the overall control device 10 to each of the wind power generators 2 installed in the wind power plant 100 may be configured. In this case, one control device 31 performs the above-described control as a master, and sends a sway angle to the slave controller, that is, the other control device 31, through the output signal line group 16 and the communication network 5, Command values for pitch angle, generator torque, etc.

As described above, according to the present embodiment, in addition to the effect of the first embodiment, the control by the wind power plant control system can be started earlier, and in the case where the rapid change of the wind direction is instantaneous, there is no need to stop the setting in the wind power plant. All the wind power generation devices in the system can continue to operate, and the work ratio in the wind power plant can be further improved. Moreover, according to the present embodiment, it is also possible to unite with other wind power plants. [Example 4]

In the wind power plant control system according to the present embodiment, in the above-described first embodiment to third embodiment, the wind power generator 2 installed in the wind power plant is limited to the case of the downwind type wind power generator, and is controlled as a whole. The device 10 transmits the command value (control command) of the control device 31b of the wind power generator 2b disposed on the leeward side of the wind power plant 100 and the control device 31 of the other wind power generator 2, and includes a sway angle fit. The wind direction is free to change with the effect of the weather vane. As a result, when the fluctuation of the wind direction is large, the sway angle can quickly follow the upwind direction, and the load of the drive motor of the yaw angle control device (not shown) can be reduced.

As described above, according to the present embodiment, in addition to the effect of the first embodiment, in the case where the variation in the wind direction is large, the yaw angle can be quickly followed by the upwind direction. Moreover, according to the present embodiment, the command value (control command) transmitted from the overall control device 10 includes a free sway, whereby the load of the drive motor of the yaw angle control device can be reduced. [Example 5]

In the wind power plant control system according to the present embodiment, in the above-described Embodiment 1 to Embodiment 4, the control is transmitted from the overall control device 10 to the wind power generating device 2b disposed on the leeward side at the position within the wind power plant 100. The command value (control command) of the device 31b and the other control device 31 of the wind turbine generator 2 includes a follow-up command value of the above-described active yaw control that can speed up the wind power generator. Specifically, as the command value (control command) transmitted from the overall control device 10, for example, the command value for reducing the minimum yaw angle error at which the active yaw control is started is shortened, and the use of each of the wind turbine generators 2 is shortened. The control device 31 (for example, SCADA) calculates the time constant of the averaging time of the wind direction when calculating the sway angle error, or increases the command value of the output of the drive motor of the yaw angle control device (not shown).

As described above, according to the present embodiment, in addition to the effects of the first embodiment, it is possible to speed up the follow-up of the active yaw control.

Further, the present invention is not limited to the above-described embodiments, and includes various modifications. For example, the above-described embodiments are described in detail for easy understanding of the present invention, and are not necessarily limited to having all of the configurations described. Further, a part of the configuration of one embodiment may be replaced with a configuration of another embodiment, and a configuration of another embodiment may be added to the configuration of another embodiment.

1, 1a, 1b‧‧‧ wind power plant control system

2‧‧‧Wind power plant

2a‧‧‧ Wind power installations on the windward side

2b‧‧‧ Wind power installations on the downwind side

3‧‧‧Operation Management Center

4a‧‧‧Pitch angle sensor

4b‧‧‧ strain sensor

4c‧‧‧Wind anemometer

4d‧‧‧flat angle sensor

5‧‧‧Communication network

6‧‧‧Electronic terminal

7‧‧‧Server

10‧‧‧ overall control unit

11‧‧‧ flat angle error abnormal value determination unit

12‧‧‧Do you need to control the judgment department?

13‧‧‧Command Value Determination Department

14‧‧‧Load fatigue calculation department

15‧‧‧Input signal line group

16‧‧‧Output signal line group

20‧‧‧ wind

21‧‧‧ Tower

22‧‧‧Cabinet

23‧‧‧ hub

24‧‧‧ leaves

25‧‧‧ Spindle

26‧‧‧Shrink disk

27‧‧‧Speed increasing mechanism

28‧‧‧ Generator

29‧‧‧Main frame

30‧‧‧Power Converter

31, 31a, 31b‧‧‧ control devices

40‧‧‧ sensor

100, 200‧‧‧ wind power plants

Fig. 1 is a schematic overall configuration diagram of a wind power plant control system according to a first embodiment of the present invention. FIG. 2 is a view showing a schematic configuration of a wind power generator installed in a wind power plant in the wind power plant control system shown in FIG. 1. Fig. 3 is a block diagram showing the function of the overall control device shown in Fig. 1. FIG. 4 is a graph showing an example of a determination criterion for determining whether or not control is necessary in the control unit in the overall control device shown in FIG. 3 . FIG. 5 is a graph showing an example of a case where the threshold value of the yaw angle error of the wind power generator according to the first embodiment is changed to be high. FIG. 6 is a graph showing another example of a determination criterion for determining whether or not control is necessary in the overall determination unit shown in FIG. FIG. 7 is a graph showing an example of a case where the control of the yaw angle of the wind turbine generator of the first embodiment has been changed. FIG. 8 is a view showing an operational state of a plurality of wind power generators in a wind power plant according to a comparative example. FIG. 9 is a view showing an operational state of a plurality of wind power generators in the wind power plant according to the first embodiment. Fig. 10 is a schematic overall configuration diagram of a wind power plant control system according to a second embodiment of the embodiment of the present invention. Fig. 11 is a schematic overall configuration diagram of a wind power plant control system according to a third embodiment of the embodiment of the present invention.

Claims (15)

A wind power plant control system has a wind power plant, the wind power plant having a plurality of wind power generation devices, the wind power generation device having at least a rotor that rotates by wind, a nacelle, and a tower that supports the nacelle to be swingable And a control device; wherein: the plurality of wind power generators installed in the wind power plant, the control device of the wind power generator that detects the rapid change of the wind direction transmits at least the wind direction measurement value and the yaw The sway angle error obtained by the angular measurement value is determined to be within a specific first threshold value within a specific period, and the specific first threshold value including the other wind power generation device is changed or leveled based on the determination result. The command value of the swing angle is transmitted to the control device of the other wind power generator described above. The wind power plant control system according to claim 1, wherein the overall control device includes: a sway angle error abnormal value determining unit that determines whether the yaw angle error is specific for a specific period of time And a control determination unit that determines whether it is necessary to include the specific first threshold value including the other wind power generation device based on the determination result by the sway angle error abnormal value determination unit. The command value of the change or the sway angle is transmitted to the control device of the other wind power generation device; the overall control device is disposed at a position away from the wind power plant, and is transmitted through the communication network and controlled by each wind power generation device. Device connection. The wind power plant control system according to claim 1, wherein the control device of each of the wind power generators includes: a sway angle error abnormal value determining unit that determines whether the sway angle error is in a specific first time within a specific period And a control determination unit that determines whether it is necessary to change the specific first threshold value including the other wind power generation device or based on the determination result by the sway angle error abnormal value determining unit. The command value of the sway angle is transmitted to the control device of the wind power generator described above; and the control devices of the wind power generators are connected to each other through a communication network. The wind power plant control system of claim 2 or claim 3, wherein the control angle determining unit determines that the sway angle error is within a specific period of time by using the yaw angle error abnormal value determining unit When the specific first threshold value is within, the specific first threshold value of the other wind power generator is changed to a threshold higher than the first threshold. The wind power plant control system of claim 2 or claim 3, wherein the control angle determining unit determines that the sway angle error is within a specific period of time by using the yaw angle error abnormal value determining unit When the state exceeds the specific first threshold value, the command value including the sway angle is transmitted to the control device of the other wind power generator. The wind power plant control system according to claim 5, wherein the control angle determining unit determines that the sway angle error exceeds a specific number for a predetermined period of time by the sway angle error abnormal value determining unit. In the case of the state of the threshold value, the other wind power generator including the load fatigue calculation unit is a command value of the swing angle and the pitch angle and the torque command value that can be continuously operated, and is transmitted to the other ones. Control device for wind power generation equipment. The wind power plant control system according to claim 4, wherein a plurality of sensors are provided outside the wind power plant and disposed at positions apart from each other; and the control device of the one wind power generator is used from the plurality of At least the wind direction measurement value and the aforementioned yaw angle measurement value are measured by the sensor, and the yaw angle error is obtained. The wind power plant control system according to claim 5, wherein a plurality of sensors are provided outside the wind power plant and disposed at positions apart from each other; and the control device of the one wind power generator is used from the plurality of At least the wind direction measurement value and the aforementioned yaw angle measurement value are measured by the sensor, and the yaw angle error is obtained. The wind power plant control system according to claim 4, wherein the control device of the one wind power generation device is from another wind power plant, a solar power generation station located outside the wind power plant, and can be measured and acquired. The wind direction measurement value and the sway angle measurement value of any one of the weather information of the wind speed and the wind direction are used to obtain a sway angle error; whether the control determination unit is required to exceed the specific yaw angle error When the first threshold is still low, the specific first threshold value of the other wind power generator is changed to a threshold higher than the first threshold. The wind power plant control system according to claim 5, wherein the command value of the control device that is required to be transmitted by the control determination unit to the other wind power generation device includes changing the yaw angle to the wind direction and using the weather mark effect to freely change. Free swing. The wind power plant control system according to claim 5, wherein the command value of the control device that is required to be transmitted by the control determination unit to the other wind power generation device includes a follow-up command value that can speed up the yaw control. A method for controlling a wind power plant, the wind power plant having a plurality of wind power generation devices, the wind power generation device having at least a rotor that is rotated by the wind, a nacelle, a tower that supports the nacelle to be swingable, and a control device; A plurality of wind power generators installed in the wind power plant are configured to transmit at least a wind direction measurement value and a swing angle measurement value from a control device of the wind power generation device that detects a rapid change in the wind direction. The sway angle error is determined to be within a specific first threshold within a specific period of time, and the specific first threshold value or the yaw angle command value including the other wind power generators is included based on the determination result. And sent to the control device of the other wind power generation device described above. The method of controlling a wind power plant according to claim 12, wherein, when the sway angle error abnormal value determining unit determines that the yaw angle error is within a specific first threshold within a specific period, The specific first threshold value of the other wind power generator is changed to a threshold higher than the first threshold. The control method of the wind power plant according to claim 12, wherein, in the case where it is determined that the sway angle error is in a state of continuously exceeding a specific first threshold value for a certain period of time, the command value including the aforementioned yaw angle is set And sent to the control device of the other wind power generation device described above. The method of controlling a wind power plant according to claim 14, wherein, when it is determined that the sway angle error exceeds a specific first threshold value for a specific period of time, the load fatigue calculation unit is included The other wind power generators described above are command values of the swing angle, the pitch angle, and the torque command value that can be continuously operated, and are transmitted to the control device of the other wind power generator.