JPH08237867A - Power converter control device - Google Patents

Abstract

(57) [Summary] (Modified) [Object] To provide a control device of a power control device in which the responses of reactive power and active power are not affected by changes in the q-axis component V _q of the terminal voltage. [Structure] When controlling a power conversion device 1 connected to a bus system 2 to supply power to the bus system or to control reactive power, voltage of a path to which the power conversion device is connected, current detection means, and voltage. The phase detection means 4, the voltage / current reactive power detection means 3, the voltage detection means of the q-axis component on the dq-axis orthogonal coordinates of the voltage, and the deviation between the detected reactive power and the reactive power command are calculated. The deviation is divided by the q-axis component of the voltage, and the reactive power control means 9 that outputs at least an integral operation to the d-axis current command on the dq-axis orthogonal coordinates and the dq-axis orthogonal coordinates of the detected current. The upper d-axis current is detected, and the power conversion device is controlled so that this is equal to the d-axis current command.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control device for a power converter that feeds or receives at least one of reactive power and active power to a bus system.

[0002]

2. Description of the Related Art FIG. 7 is a schematic block diagram of a conventional reactive power controller for a power converter. In the figure, reference numeral 1 denotes a power conversion device that supplies energy to a bus system to or receives energy from a power source or a rotating body. For example, a power conversion unit used for a reactive power compensator, direct current transmission, a rotary capacitor, or the like. It is configured to include. 2 is a power converter 1
Is connected to a three-phase system bus, 3 is a reactive power detector that detects reactive power from terminal voltage v and line current i obtained through a transformer and a current transformer, and 4 is phase θ of terminal voltage. Phase detector, 7 detects the detected value Q from the reactive power command Q ^*
A subtractor for subtracting 9 and a reactive power controller 9 for proportionally and integrating the output of the subtractor 7 and outputting a d-axis current command I _d ^* ,
Reference numeral 10 controls the power converter 1 using the phase Q output from the phase detector 4 so that the d-axis component I _d of the line current i becomes equal to the d-axis current command I _d ^* output from the reactive power controller 9. It is a current controller.

In the above structure, the reactive power controller 9 is
The deviation between the reactive power command Q ^* and the reactive power Q obtained via the subtractor 7 is proportionally integrated and amplified to obtain the d-axis current command I _d ^* so that the error between the reactive power command Q ^* and the reactive power Q is eliminated. Output. The d-axis current controller 10 converts the line current i into a value on the dq-axis orthogonal coordinates that rotates at the frequency of the terminal voltage v by using the phase signal θ of the terminal voltage v detected by the phase detector to convert the d-axis. detecting a current I _d, controls the power conversion device 1 as the d-axis current I _d becomes equal to d-axis current command I _d ^* to be output from the reactive power controller 9. The power converter receives the signal given from the d-axis current controller 10,
The line current i is supplied to the bus system by using the energy of the power source and the rotating body connected to the power converter.

[0004]

In the control device of the conventional power converter, the control characteristic of the reactive power Q changes when the terminal voltage v changes, and the control characteristic of the reactive power is uniform at all values of the terminal voltage. It was impossible to obtain, and it was difficult to design the constant of the power controller.

Furthermore, since it is impossible to obtain a uniform reactive power control characteristic at all values of the terminal voltage,
The constant of the power controller could not be designed optimally, and it was difficult to speed up the response of the reactive power.

The reason why the reactive power control characteristic changes when the terminal voltage changes is that the reactive power Q depends on the terminal voltage. The reactive power Q is the dq axis component V of the terminal voltage.
_{For d} , V _q and dq axis components I _d , I _{q of the} line current, the following equation (1) is given.

[0007] By arranging the _{Q = V q · I d -V} d · I q (1) terminal voltage to the q-axis, phasor diagram of the terminal voltage V and the line current I on the dq-axis orthogonal coordinate in FIG. 8 Like
As can be seen from FIG. 8, since the terminal voltage is arranged on the q axis, the d axis component of the terminal voltage becomes zero. At this time, the reactive power Q
Is expressed by the following equation (2), and the d-axis component I _{d of the} line current is
Affects the reactive power.

Q = V _q I _d (2) As shown in the equation (2), when the d-axis component I _d of the line current is controlled to control the reactive power, the q-axis component V _{q of the} terminal voltage.
Changes in the ratio, the rate of change in the reactive power Q with respect to the change in the d-axis component I _d of the line current will change.

Further, there is a similar relationship regarding active power. The active power P is the dq axis components V _d and V _q of the terminal voltage.
And the dq axis components I _d and I _{q of the} line current,
It is expressed as in equation (3).

P = V _d · I _d + V _q · I _q (3) If the terminal voltage is arranged on the q-axis, the d-axis component of the terminal voltage becomes zero, and the active power P is expressed by the following equation (4). The q-axis component I _q of the line current acts on the reactive power.

P = V _q I _q (4) As shown in the equation (4), when the active power is controlled by controlling the q-axis component I _q of the line current, the q-axis component V _{q of the} terminal voltage is obtained.
If the value changes, the rate of change of the active power P with respect to the change of the q-axis component I _q of the line current will change.

That is, a uniform response of reactive power and active power is not obtained for all values of V _q , and it is difficult to design the constant of the power controller, which makes it impossible to perform optimum design. This also leads to difficulty in increasing the response of the power controller.

Therefore, it has been desired to prevent the reactive power and active power responses from being affected by changes in the q-axis component V _q of the terminal voltage.

The present invention has been made to solve the above problems, and an object thereof is to control at least one of reactive power and active power so that the response of the reactive power and active power is the q-axis of the terminal voltage. An object of the present invention is to provide a control device for a power control device that is not affected by changes in the component V _q .

[0015]

According to a first aspect of the present invention, there is provided a power converter control device, which controls a power converter connected to a bus system to supply power to the bus system or receive power from the bus system. In controlling the reactive power, the voltage and current detecting means for detecting the voltage and current of the path to which the power converter is connected, the phase detecting means for detecting the phase of the detected voltage, and the detected voltage and current A reactive power detecting means for detecting the reactive power based on the above, a voltage detecting means for detecting a q axis component of the detected voltage on dq axis orthogonal coordinates, a detected reactive power and a preset reactive power command. Is calculated, the deviation is divided by the q-axis component of the voltage detected by the voltage detecting means, and at least an integral calculation is performed on the obtained value to calculate the dq-axis orthogonal coordinates. The reactive power control means for outputting the above d-axis current command and the d-axis current on the dq-axis orthogonal coordinates of the detected current are detected by using the detected voltage phase, and the d-axis current and the d-axis current are detected. And a current control unit that controls the power converter so that the command becomes equal to the command.

A control device for a power converter according to a second aspect of the invention controls a power converter connected to a bus system to control reactive power supplied to the bus system or received from the bus system. At this time, voltage and current detection means for detecting the voltage and current of the path to which the power conversion device is connected, phase detection means for detecting the phase of the detected voltage, and reactive power based on the detected voltage and current. Reactive power detecting means for detecting and dq of the detected voltage
A voltage detecting means for detecting a q-axis component on the axis-coordinate coordinate and a deviation between the detected reactive power and a preset reactive power command are calculated, and at least an integral calculation is executed on the deviation to obtain a value. The detected value is divided by the q-axis component of the voltage detected by the voltage detecting means to output the d-axis current command on the dq-axis orthogonal coordinates, and the detected value using the phase of the detected voltage. Current control means for detecting a d-axis current on the dq-axis orthogonal coordinates of the current and controlling the power converter so that the d-axis current and the d-axis current command become equal.

A control device for a power converter according to a third aspect of the present invention controls the power converter connected to the bus system so as to control active power supplied to the bus system or received from the bus system. At this time, voltage and current detection means for detecting the voltage and current of the path to which the power conversion device is connected, phase detection means for detecting the phase of the detected voltage, and active power based on the detected voltage and current. Active power detecting means for detecting and dq of detected voltage
A voltage detecting means for detecting a q-axis component on the axis-coordinate coordinate and a deviation between the detected active power and a preset active power command are calculated, and the deviation is detected by q of the voltage detected by the voltage detecting means. It is detected by using the reactive power control means that divides by the axis component, executes the at least integral calculation on the obtained value, and outputs the q-axis current command on the dq-axis orthogonal coordinates, and the phase of the detected voltage. A current control unit that detects a q-axis current on the dq-axis orthogonal coordinates of the generated current and controls the power conversion device so that the q-axis current and the q-axis current command become equal to each other.

A control device for a power converter according to a fourth aspect of the invention controls the power converter connected to the bus system to control active power supplied to or received from the bus system. At this time, voltage and current detection means for detecting the voltage and current of the path to which the power conversion device is connected, phase detection means for detecting the phase of the detected voltage, and active power based on the detected voltage and current. Active power detecting means for detecting and dq of detected voltage
A voltage detecting means for detecting a q-axis component on the axis-coordinate coordinate and a deviation between the detected active power and a preset active power command are calculated, and at least an integral calculation is executed on the deviation to obtain a value. The value detected is divided by the q-axis component of the voltage detected by the voltage detection means to output the q-axis current command on the dq-axis Cartesian coordinates, and detected using the phase of the detected voltage. A current control unit that detects a q-axis current on the dq-axis orthogonal coordinates of the generated current and controls the power conversion device so that the q-axis current and the q-axis current command become equal to each other.

According to a fifth aspect of the present invention, in the control device for the power converter, voltage amplitude detection means for detecting the amplitude of the voltage is provided in place of the voltage detection means for detecting the q-axis component of the voltage, and the q-axis component of the voltage is provided. Instead of, the terminal voltage amplitude is used for division.

[0020]

In the controller of the power converter according to the first aspect of the present invention, in controlling the reactive power, the q-axis component of the voltage is detected while the deviation of the reactive power and the reactive power command is detected. Divide by the q-axis component, at least an integral operation is performed on the obtained value to obtain a d-axis current command, and the d-axis current of the current is detected using the detected voltage phase. Since the power converter is controlled so that the axis current and the d-axis current command are equal, the reactive power response is independent of the magnitude of the voltage.

In the control device for the power converter according to the second aspect of the present invention, when controlling the reactive power, the q-axis component of the voltage is detected and at least an integral operation is performed on the deviation between the reactive power and the reactive power command. The d-axis current command is executed by dividing the obtained value by the q-axis component of the detected voltage, and the d-axis current of the current is detected using the phase of the detected voltage. Since the power converter is controlled so that the current and the d-axis current command are equal, the response of the reactive power becomes independent of the magnitude of the voltage.

In the control device for a power converter according to a third aspect of the present invention, when controlling the active current, the q-axis component of the voltage is detected, while the deviation between the active power and the active power command is detected. The q-axis current is divided by the q-axis component, at least an integral operation is performed on the obtained value to obtain the q-axis current command, and the q-axis current of the current is detected using the phase of the detected voltage. Since the power converter is controlled so that the axis current and the q-axis current command are equal, the response of active power is independent of the magnitude of voltage.

In the control device for the power converter according to the fourth aspect of the present invention, when controlling the active power, the q-axis component of the voltage is detected and at least the integral calculation is performed for the deviation between the active power and the active power command. Execute and divide the obtained value by the q-axis component of the detected voltage to obtain the q-axis current command, and then detect the q-axis current of the current using the phase of the detected voltage. Since the power converter is controlled so that the current and the q-axis current command are equal, the response of the active power is independent of the magnitude of the voltage.

In the controller for the power converter according to the fifth aspect, the amplitude is detected instead of the q-axis component of the voltage,
This is used for division instead of the q-axis component of voltage.

[0025]

The present invention will be described in detail below with reference to the embodiments shown in the drawings. FIG. 1 is a block diagram showing a configuration of a first embodiment of a control device for a power conversion device according to the present invention. In the figure, the same elements as those of FIG. 7 showing the conventional apparatus are designated by the same reference numerals, and the description thereof will be omitted. In this device, a voltage detector 5, a limiter 6 and a divider 8 are newly added to the device shown in FIG. Of these, the voltage detector 5 detects the q-axis component V _q of the terminal voltage v from the terminal voltage v and the phase θ. Limiter 6 is intended to limit its value when the q-axis component V _q of the terminal voltage v output from the voltage detector 5 becomes zero or less. The divider 8 divides the output of the subtractor 7 by the output of the limiter 6 and adds it to the reactive power controller 9.

The operation of this embodiment configured as described above will be described below, focusing on the part that is different in structure from the conventional device. The subtractor 7 subtracts the reactive power detection value Q from the reactive power command Q ^* and outputs the deviation. The voltage detector 5 converts the three-phase components v _u , v _v , v _w of the terminal voltage v into the two-phase components V _a , V _b using the following equations (5A) and (5B).

[0027]

[Equation 1] Further, the voltage detector 5 uses the phase θ of the terminal voltage as follows.
(6) detecting the q-axis component V _q of the terminal voltage by formula.

V _q = −V _a · sin θ + V _b · cos θ (6) This q-axis voltage V _q is an amount obtained by coordinate-transforming the AC terminal voltage v with its own phase, and is a DC amount. Become. The limiter 6 prevents the divider 8 from performing zero division when the q-axis voltage V _q output from the voltage detector 5 is zero, and the output signal of the subtractor 7 is reactive power when the q-axis voltage V _q is negative. In order to prevent the input signal of the controller 9 from having a different sign, it has a function of limiting the value of the q-axis voltage V _q below 0. Then, the deviation of the reactive power output from the subtractor 7 is divided by the q-axis voltage V _q output from the limiter to generate the reactive power controller 9
Is added to The reactive power controller 9 proportionally integrates the reactive power deviation divided by the q-axis voltage _Vq , and d-axis current command I
Output _d ^* . The d-axis current controller 10 uses the d-axis current command I
_While inputting _d ^* , the three-phase components _iu , _iv , and
The i _w is converted into the two-phase components I _a and I _b using the following equations (7A) and (7B).

[0029]

[Equation 2] Further, the d-axis current controller 10 calculates the d-axis current I _d by using the phase θ of the terminal voltage and coordinate-converting it into a value on the Cartesian coordinate which rotates at the frequency of the terminal voltage v by the formula (8A) below.

I _d = I _a · cos θ + I _b · sin θ (8A) Subsequently, the d-axis current controller 10 compares the d-axis component I _d with the current command I _d ^*, and the difference becomes zero. The power converter 1 is controlled so that The power conversion device 1 operates to obtain a signal output from the current controller, obtain energy from a DC power supply, an AC power supply, a rotating body, or the like to adjust the line current.

Thus, by adjusting the input of the reactive power controller 9 according to the q-axis component of the terminal voltage v, the reactive power Q is controlled at a constant response speed without being influenced by the terminal voltage v. can do.

FIG. 2 is a block diagram showing the configuration of the second embodiment of the control device for the power converter according to the present invention. In the figure,
The same elements as those in FIG. 1 are designated by the same reference numerals and the description thereof will be omitted. In this device, the divider 8 shown in FIG. 1 is installed in the subsequent stage of the reactive power controller 9. This embodiment, the reactive power controller 9 is because of its integrating function, by the action of q-axis component V _q of the accumulated in the integrating portion signal components to the terminal voltage v. As a result, not only the reactive power Q can be controlled at a constant response speed without being affected by the terminal voltage v, but also the reactive power Q due to a change in the terminal voltage v caused by a change in the state of the bus system can be obtained. It is possible to reduce the effect of.

FIG. 3 is a block diagram showing the configuration of a third embodiment of the control device for the power converter according to the present invention. In the figure,
The same elements as those shown in FIG. 1 are designated by the same reference numerals and the description thereof will be omitted. In FIG. 3, 11 is the terminal voltage v
And an active power detector that detects active power from the line current i, 1
2 is a subtractor that subtracts the detection value P from the active power command P ^* , 13 is a divider that divides the output of the subtractor 12 by the output of the limiter 6, and 14 is the q-axis current that proportionally integrates the output of the divider 13. Active power controller for outputting command I _q ^* , 15
Calculates the q-axis component I _q of the line current i using the phase θ output from the phase detector 4, and the q-axis component I _q and the q-axis current command I _q ^* output by the active power controller 9. Is a q-axis current controller that controls the power conversion device 1 so that

In this case, the q-axis current controller 15 converts the three-phase components i _u , _iv , and i _w of the line current into the two-phase components I _a and I _b using the equations (7A) and (7B). .

Further, the q-axis current controller 15 uses the phase θ of the terminal voltage to coordinate-convert the q-axis current I _q into a value on the Cartesian coordinate which rotates at the frequency of the terminal voltage v by the following equation (8B). Calculate

I _q = −I _a · sin θ + I _b · cos θ (8B) Next, the q-axis current controller 15 compares the q-axis component I _q with the current command I _q ^*, and the difference is zero. The power converter 1 is controlled so that By thus adjusting the input of the active power controller 14 according to the q-axis component of the terminal voltage v, the active power P is controlled at a constant response speed without being influenced by the terminal voltage v. You can

FIG. 4 is a block diagram showing the configuration of the fourth embodiment of the power conversion device according to the present invention. In the figure, the same elements as those of FIG. 3 are designated by the same reference numerals, and the description thereof will be omitted.

In this embodiment, since the active power controller 14 has an integration function, the q-axis component V _q of the terminal voltage v acts on the signal component accumulated in the integration portion as well, as shown in FIG. Divider 13 and active power controller 1 in the embodiment
The positions of 4 are replaced.

Thus, not only the active power P can be controlled at a constant response speed without being influenced by the terminal voltage v, but also the fluctuation of the terminal voltage v caused by the change of the state of the bus system is effective. It is possible to reduce the influence on the electric power P.

FIG. 5 is a block diagram showing the configuration of a fifth embodiment of the control device for the power converter according to the present invention. In the figure,
The same elements as those in FIG. 4 are designated by the same reference numerals and the description thereof will be omitted. In FIG. 5, 16 is from the terminal voltage v to the above (5A)
It is a voltage amplitude detector that detects the amplitude component V _m of the terminal voltage based on equation (5B) and equation (9) below.

[0041]

(Equation 3) In this embodiment, since the phase detector 4 outputs the phase θ so that the terminal voltage v is arranged on the q axis, the d axis component V _d of the terminal voltage v becomes zero and the q axis component V of the terminal voltage v. _{Since q} and the amplitude component V _m of the terminal voltage v are equal, the voltage amplitude detector 16 is used instead of the voltage detector 5, and the output of the active amplitude controller 14 is the output V _m of the voltage amplitude detector 16. The q-axis current command I _q ^* is obtained by division.

As a result, not only the active power P can be controlled at a constant response speed without being influenced by the terminal voltage v, but also the fluctuation of the terminal voltage v caused by the change of the state of the bus system is effective. It is possible to reduce the influence on the electric power P.

FIG. 6 is a block diagram showing the overall construction when the embodiments shown in FIGS. 2 and 4 are applied to a variable speed generator-motor.

In FIG. 6, reference numeral 17 denotes a variable speed generator / motor which is an object to be controlled and which supplies or receives energy of the rotating body to or from the bus system, and 18 is a signal output from the d-axis current controller 10 or the q-axis current controller 15. In response to this, an exciting device for supplying a field current _if to the rotor winding of the variable speed generator / motor 17, 19 is a rotary phase detector for detecting the phase θ _p of the rotor of the variable speed generator / motor 17, and 20 is a phase. This is a subtractor that outputs the result of subtracting the rotor phase θ _p detected by the rotation phase detector 19 from the phase θ of the terminal voltage v detected by the detector 4, and is otherwise the same as in FIGS. 2 and 4. The same reference numeral is used.

[0045] This embodiment, by adjusting the field current i _f instead of the line current i, as in the case of adjusting the line current i, the reactive power Q and active power P is supplied to the system bus 2 Since the adjustment is possible, the outputs of the divider 8 and the divider 14 are set to the commands I _fd ^* and I _fq of the dq axis components of the field current.
^{The value obtained} by subtracting ^* from the phase θ of the terminal voltage v detected by the phase detector 4 by the subtractor 20 and the phase θ _p of the rotor detected by the rotary phase detector 19 is the d-axis current controller 1
A field current _if having a frequency obtained by subtracting the rotation frequency of the rotor of the variable speed generator motor 17 from the frequency of the terminal voltage v is input to the variable speed generator motor 17 as an input of each phase portion of the 0 and q axis current controllers 15. Supply the d-axis current controller 10 to d
The exciter 18 is controlled so that the axial field current command I _fd ^* and the d-axis field current I _fd are equal, and the q-axis current controller 15 controls the q-axis field current command I _fq ^* and the q-axis field current. The exciter 18 is controlled so that the current I _fq becomes equal.

As a result, not only the reactive power Q and the active power P can be controlled at a constant response speed without being influenced by the terminal voltage v, but also the terminal voltage v caused by a change in the state of the bus system or the like. It is possible to reduce the influence of the fluctuations on the reactive power θ and the active power P.

[0047]

According to the present invention, the reactive power or the active power can be controlled at a constant response speed without being influenced by the terminal voltage, and the terminal voltage caused by the change of the state of the bus system or the like. It is possible to reduce the influence of the fluctuations on the reactive power and the active power, and it is possible to reduce the difficulty in designing the power control device and improve the control characteristics of the power control device.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a first embodiment of a control device for a power conversion device according to the present invention.

FIG. 2 is a block diagram showing the configuration of a second embodiment of the control device for the power converter according to the present invention.

FIG. 3 is a block diagram showing the configuration of a third embodiment of the control device for the power converter according to the present invention.

FIG. 4 is a block diagram showing the configuration of a fourth embodiment of the control device for the power converter according to the present invention.

FIG. 5 is a block diagram showing the configuration of a fifth embodiment of the control device for the power converter according to the present invention.

FIG. 6 is a block diagram showing the configuration of a power conversion system to which second and fourth embodiments of the control device for the power conversion device according to the present invention are applied.

FIG. 7 is a block diagram showing a configuration of a control device of a conventional power conversion device.

8 is a phasor diagram showing the relationship between the terminal voltage V and the line current I on the dq-axis orthogonal coordinates in order to explain the operation of the power conversion device shown in FIG. 7.

[Explanation of symbols]

 1 Power Converter 2 Bus System 3 Reactive Power Detector 4 Phase Detector 5 Voltage Detector 6 Limiter 7, 12, 20 Subtractor 8, 14 Divider 9 Reactive Power Controller 10 d-Axis Current Controller 11 Active Power Detector 13 Active Power Controller 15 q-axis Current Controller 16 Voltage Amplitude Detector 17 Variable Speed Generator / Motor 18 Exciter 19 Rotational Phase Detector

Claims (5)

[Claims] 1. A controller for a power converter that controls a power converter connected to a bus system to supply power to the bus system or control reactive power received from the bus system. A voltage and current detecting means for detecting the voltage and current of the path to which the conversion device is connected, a phase detecting means for detecting the phase of the detected voltage, and a reactive power detecting reactive power based on the detected voltage and current. The power detection means, the voltage detection means for detecting the q-axis component of the detected voltage on the dq-axis orthogonal coordinates, the deviation between the detected reactive power and the preset reactive power command, and the deviation Is divided by the q-axis component of the voltage detected by the voltage detecting means, and at least an integral operation is performed on the obtained value to give a d-axis current command on dq-axis orthogonal coordinates. The reactive power control means for outputting and the d-axis current on the dq-axis orthogonal coordinates of the detected current are detected by using the detected voltage phase,
A control device for a power conversion device, comprising: current control means for controlling the power conversion device so that the d-axis current and the d-axis current command become equal to each other. 2. A controller of a power converter for controlling a reactive power received from the bus system by supplying power to the bus system by controlling a power converter connected to the bus system. A voltage and current detecting means for detecting a voltage and a current of a path to which the conversion device is connected, and a phase detecting means for detecting a phase of the detected voltage,
Reactive power detection means for detecting reactive power based on the detected voltage and current, voltage detection means for detecting q-axis component on dq-axis orthogonal coordinates of the detected voltage, detected reactive power and preset The deviation from the generated reactive power command is calculated, at least an integral calculation is executed on this deviation, and the obtained value is divided by the q-axis component of the voltage detected by the voltage detecting means to orthogonalize the dq axes. The reactive power control means for outputting the d-axis current command on the coordinates and the d-axis current on the dq-axis orthogonal coordinates of the detected current using the phase of the detected voltage are detected, and the d-axis current and the d A control device for a power conversion device, comprising: a current control means for controlling the power conversion device such that the axial current command becomes equal to the axis current command. 3. A control device for a power converter that controls active power that is supplied to the bus system or that receives active power from the bus system by controlling a power converter that is connected to the bus system. A voltage / current detecting means for detecting a voltage and a current of a path to which the conversion device is connected, a phase detecting means for detecting a phase of the detected voltage, and an effective for detecting active power based on the detected voltage and current. The power detection means, the voltage detection means for detecting the q-axis component of the detected voltage on the dq-axis orthogonal coordinates, the deviation between the detected active power and the preset active power command, and the deviation Is divided by the q-axis component of the voltage detected by the voltage detecting means, and at least an integral operation is executed on the obtained value to give a q-axis current command on dq-axis orthogonal coordinates. The q-axis current on the dq-axis orthogonal coordinates of the detected current is detected by using the reactive power control means for output and the phase of the detected voltage,
A control device for a power conversion device, comprising: current control means for controlling the power conversion device so that the q-axis current and the q-axis current command become equal to each other. 4. A control device for a power converter that controls active power connected to a bus system to supply power to the bus system or control active power received from the bus system. A voltage and current detecting means for detecting a voltage and a current of a path to which the conversion device is connected, and a phase detecting means for detecting a phase of the detected voltage,
Active power detection means for detecting active power based on the detected voltage and current, voltage detection means for detecting q-axis component on dq-axis orthogonal coordinates of the detected voltage, detected active power and preset The deviation from the generated active power command, at least an integral calculation is executed on the deviation, and the obtained value is divided by the q-axis component of the voltage detected by the voltage detecting means to orthogonalize the dq axes. The active power control means for outputting the q-axis current command on the coordinates and the q-axis current on the dq-axis orthogonal coordinates of the detected current using the detected voltage phase are detected, and the q-axis current and the q A control device for a power conversion device, comprising: a current control means for controlling the power conversion device such that the axial current command becomes equal to the axis current command. 5. A voltage amplitude detecting means for detecting the amplitude of the voltage is provided in place of the voltage detecting means for detecting the q-axis component of the voltage, and the amplitude of the terminal voltage is used in place of the q-axis component of the voltage. The control device for a power conversion device according to claim 1, wherein the control device is used for division.