JPH053630A - Power system operation training simulator - Google Patents

Abstract

(57) [Summary] [Purpose] In a power system operation training simulator, it is possible to simulate the sway and out-of-step phenomenon of a generator with almost no loss of real-time simulation. [Structure] In a power system operation training simulator that simulates the response of the power system and trains trainees, frequency calculation and power flow calculation are performed in the steady state, and transient stability calculation is performed for several cycles from the start of the accident simulation. Means 12 for switching the calculation method, means 9 for calculating the values of system frequency, generator output and load by frequency calculation, means 10 for calculating transmission line power flow and bus voltage by power flow calculation, and power generation by transient stability calculation Means 13 for calculating the state quantity and node voltage of the machine, and for calculating the system frequency, generator output, load value, transmission line power flow and bus voltage based on the transient stability calculation result, and at the same time, Means of simulating response 15
And means 11 for simulating the response of the electric power system.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power system operation training simulator for simulating the response of the power system and for training the system operator (hereinafter referred to as trainee) of the system for supplying / demanding / controlling the power system. Regarding

[0002]

2. Description of the Related Art An outline of a power system operation training simulator will be briefly described. The power system operation training simulator is intended to train a system to be trained, that is, an operator of a power supply station or an integrated control computer system.
The trainee operates the trainee system as if it were an actual system by simulating the response of the power system to the data setting and control by the trainer (hereinafter referred to as the trainer) and the control performed by the trainee through the trainee system. The situation is created and trainees are trained.

In the conventional electric power system operation training simulator, the frequency of the electric power system is calculated from the balance relationship between the demand (load) and the supply (power generation) of electric power, and the value of the load is calculated from the frequency characteristic of the load to further generate the electric power. The generator output value is calculated by simulating the response due to the frequency change of the machine governor, and the power flow calculation is performed by inputting these calculated load value and generator output value, and the state quantity of the system (bus voltage or transmission line The power flow was calculated to simulate the response of the power system. Hereinafter, a conventionally used method will be described with reference to the drawings.

FIG. 3 is a functional block diagram showing the configuration of a conventional power system operation training simulator. 1 is a trainer man-machine device, 2 is a trainer man-machine device, 3
Is an input / output processing unit, 4 is a control / operation / setting data storage unit,
5 is a binary data storage unit, 6 is a numerical data storage unit, 7 is a system configuration creation processing unit, 8 is a system configuration data storage unit, 9 is a frequency calculation unit, 10 is a power flow calculation unit, and 11 is a power system response simulation unit. Is. The trainee operates and controls through the trainee man-machine device 1 to train the operation of the power system.
The trainer sets the initial system state for training and accident data via the trainer man-machine device 2, and trains the trainee. In the input / output processing unit 3, the trainee and trainer
The control / operation / setting data storage unit 4 stores control, operation, and setting data performed through the trainee man-machine apparatus 1 and the trainer man-machine apparatus 2.

Further, the input / output processing section 3 stores binary data representing the on / off states of the circuit breaker, the disconnecting switch, the 43SW, etc. from the binary data storage section 5, and the generator output, load value, bus voltage, Numerical data such as power flow and system frequency is controlled from the numerical data storage unit 6, and control, operation and setting data are controlled.
It is input from the operation / setting data storage unit 4 and output to the trainee man-machine device 1 and the trainer man-machine device 2. The system configuration creation process 7 is started by the power system response simulation unit 11 and inputs binary data from the binary data storage unit 5, and performs node degeneration to create the system configuration data so that the connection relation of the system can be handled by the calculation process. , System configuration data storage unit 8
Then, the frequency calculator 9 is activated.

The frequency calculation unit 9 inputs the generator output and the load value from the numerical data storage unit 6, and based on these inputs, determines the frequency of the power system according to the balance relationship between supply (power generation) and demand (load). Along with the calculation, the load value is calculated from the frequency characteristics of the load. Furthermore, the generator output is calculated by simulating the response due to the frequency change of the generator governor,
These load values and generator output values are stored in the numerical data storage unit 6
Save to and start the power flow calculation unit 10. The power flow calculation unit 10 inputs the system configuration data from the system configuration data storage unit 8 and also inputs the load value and the generator output from the numerical data storage unit 6 and performs the power flow calculation based on these inputs to generate the bus voltage and Calculate the power flow of the power transmission line and store these in the numerical data storage unit 6
And the power system response simulation unit 11 is activated.

The power system response simulation unit 11 inputs binary data from the binary data storage unit 5 and numerical data from the numerical data storage unit 6. Then, according to the control, operation, and setting data of the trainee and trainer input from the control / operation / setting data storage unit 4, the breaker, disconnector, and 43SW input / output
When the cutoff is performed, the binary data in the binary data storage unit 5 is updated, and when there is a change in the numerical data due to an increase or decrease operation of the generator output, the numerical data in the numerical data storage unit 6 is updated. .. In addition, the power system response simulation unit 11 inputs the accident data set by the trainer from the control / operation / setting data storage unit 4, simulates the protection relay operation at the time of an accident, and is cut off by the protection relay operation. The binary data of the binary data storage unit 5 is updated with the data of the container.

Further, the power system response simulating unit 11 inputs the bus voltage, the transmission line power flow, the generator output, etc. stored in the numerical data storage unit 6, and based on these inputs, an overvoltage relay,
A relay response simulation of an undervoltage relay, an overload relay, etc. or a system stabilizer is simulated, and the response result is stored as binary data in the binary data storage unit 5. After these processes, the power system response simulation unit 11 waits until the next simulation cycle (about 2 to 3 seconds), and activates the system configuration creation processing unit 7. By repeating the above-described processing in this way, trainee training is performed by simulating the response of the power system.

[0009]

In the electric power system, the generator may be shaken or out of step due to an accident or the like. In the event of an upset or out-of-step phenomenon of these generators, if the operator mishandles the accident, the accident will spread to the entire power system and lead to a major accident, so training under these circumstances was required. In the above-mentioned conventional method, only the fluctuation of the frequency can be simulated. Therefore, the fluctuation of the state quantity such as the output and voltage of the generator and the phenomenon such as the step-out of the generator can be accurately simulated. It was desired to develop a power system operation training simulator that can train trainees in the event of a power failure.

However, it is necessary to calculate the transient stability in order to simulate the swaying or step-out phenomenon of the generator. Even if a large computer is used for the transient stability calculation, in order to simulate a phenomenon between simulation periods (about 2 to 3 seconds), a calculation time approximately equal to the simulation period is required. In order to do so, it could not be applied to a power system operation training simulator that lacks real-time capability and requires simulating the power system response in real time. The present invention has been made to solve the above-mentioned problems, and simulates the power system using transient stability calculation only for a few cycles after the occurrence of an accident, and performs simulation by frequency calculation and power flow calculation at other steady times. Therefore, it is an object of the present invention to provide a power system operation training simulator capable of simulating the sway of the generator and the out-of-step phenomenon of the generator without substantially impairing the real-time property of the simulation.

[0011]

In order to achieve the above object, in the present invention, in a power system operation training simulator for simulating the response of the power system and training trainees, frequency calculation and power flow calculation are performed in a steady state, A means for switching the calculation method for transient stability calculation for several cycles from the start of the accident occurrence simulation, a means for calculating the values of system frequency, generator output and load by frequency calculation, and a transmission line power flow and bus line by power flow calculation Means for calculating the voltage, means for calculating the state quantity of the generator and node voltage by transient stability calculation, and a system frequency based on the transient stability calculation result,
It consisted of means for calculating generator output, load value, transmission line power flow and bus voltage, and simulating the response of the step-out separation relay, and means for simulating the response of the power system.

[Operation] Based on the accident data set by the trainer, it is determined whether the accident occurrence simulation has started or is within a few cycles thereafter. Further, it is determined whether the accident point has been repressurized by the operation of the trainee and the trainer (that is, whether the accident has recurred) or within a few cycles thereafter. By this judgment, if it is not for several cycles from the start of the accident occurrence simulation (steady state),
The state quantity of the power system is calculated by frequency calculation and power flow calculation, and during several cycles from the start of the accident simulation, transient stability calculation is performed, and based on the result, the state quantity of the power system is calculated and Simulates the response of the key separation relay. Therefore, the transient stability calculation is performed for several cycles from the start of the accident occurrence simulation, and the oscillatory phenomenon of the generator and the out-of-step phenomenon of the generator are simulated, and in other steady states, the frequency, bus voltage, and transmission line flow , Changes in generator output and load values are simulated.

[0013]

Embodiments will be described below with reference to the drawings. Figure 1
FIG. 1 is a functional block configuration diagram of an embodiment for explaining a power system operation training simulator according to the present invention. In FIG. 1, the same parts as those in FIG. 3 are designated by the same reference numerals and the description thereof will be omitted. Figure 1
In the above, 12 is a calculation switching processing unit, 13 is a transient stability calculation unit, 14 is a transient stability calculation result storage unit, and 15 is a transient stability calculation post-processing unit. The calculation switching processing unit 12 is activated by the system configuration creation processing unit 7, and the control / operation / setting data storage unit 4
The accident data set by the trainer and the operation data performed by the trainee and the trainer are input, and the system configuration data is input from the system configuration data storage unit 8. Also, if re-pressurization is applied to the accident point by trainee or trainer operation and the accident recurs, it is determined whether it is several cycles from the start of the accident recurrence simulation.

During a period other than a few cycles from the start of the simulation of the accident, that is, in the steady state, the frequency calculation unit 9 is activated to perform the same process as the conventional process. During several cycles from the start of the accident occurrence simulation, the transient stability calculation unit 13 is activated. The transient stability calculation unit 13 inputs the generator output, the load value, the bus voltage, etc. from the numerical data storage unit 6 and the system configuration data from the system configuration data storage unit 8 to calculate the transient stability. Calculate the generator current, generator angular velocity deviation, generator terminal voltage and other generator state quantities, and node voltage,
The transient stability calculation result storage unit 14 saves the transient stability calculation result and activates the transient stability calculation post-processing unit 15.

The transient stability calculation post-processing unit 15 inputs the state quantity of the generator and the node voltage from the transient stability calculation result storage unit 14, and the system frequency, generator output, load value, transmission line power flow and bus voltage. Is calculated and stored in the numerical data storage unit 6. Further, the transient stability calculation post-processing unit 15 simulates the response of the step-out separation relay based on the result of the transient stability calculation, and stores the simulation result as binary data in the binary data storage unit 5.
After these processes, the transient stability calculation post-processing unit 15 activates the power system response simulation unit 11. Other functions are the same as in FIG.

Next, an algorithm for determining whether to activate the frequency calculator 9 or the transient stability calculator 13 in the calculation switching processor 12 will be described with reference to the flowchart of FIG. In FIG. 2, step S1 is for storing accident data and trainee data from the control / operation / setting data storage unit 4. The operation data of the trainer is input, and the system configuration data is input from the system configuration data storage unit 8. In step S2, it is determined based on the data input in step S1 whether or not the accident occurrence simulation starts. If the accident occurrence simulation is started (YES), the process proceeds to step S3. If the accident occurrence simulation is not started (NO), the process proceeds to step S4. In step S3, transient stability calculation is started. In step S4, it is determined whether it is within several cycles after the accident. If it is within several cycles (YES), the process proceeds to step S5, and if it is not within several cycles (NO), the process proceeds to step S6.

In step S5, transient stability calculation is started. In step S6, the accident data entered in step S1,
It is determined from the operation data and the system configuration data whether or not the repressurization operation is performed at the accident point. When repressurized (YE
S) moves to step S7 and is not repressurized (N
O) moves to step S8. In step S7, transient stability calculation is started. In step S8, it is determined whether or not it is within several cycles after the repressurizing operation. Within a few cycles after repressurizing operation (YE
S) moves to step S9, and if it is not within several cycles after the repressurizing operation (NO), moves to step S10. In step S9, transient stability calculation is activated. In step S10, frequency calculation is started. In this way, the calculation process to be started is determined, and the calculation process and the post-start process are ended.

[0018]

As described above, according to the present invention, in the steady state, the frequency calculation and the power flow calculation are performed without losing the real-time property as in the conventional case, and the simulation is performed for several cycles from the start of the accident simulation to the accident point. For several cycles after the pressurization operation, the transient stability calculation simulates the sway of the generator and the out-of-step phenomenon of the generator. The real-time property is lost during this transient stability calculation, but this time is only about 10 seconds, which does not hinder training. It takes about 10 seconds to execute the transient stability calculation because the generator sway after the accident
This is because if it stays within 10 seconds, or if it continues for more than 10 seconds, it will be blocked by a protective device such as a step-out separation relay, and the shaking will not continue. By this method, it is possible to provide a power system operation training simulator capable of simulating the sway of the generator and the out-of-step phenomenon of the generator without substantially impairing the real-time property.

[Brief description of drawings]

FIG. 1 is a functional block configuration diagram illustrating a power system operation training simulator according to the present invention.

FIG. 2 is a flowchart for explaining a method of determining whether it is within a few cycles from the start of an accident occurrence simulation or within a few cycles from a repressurizing operation according to the present invention, and switching between transient stability calculation and frequency calculation. ..

FIG. 3 is a block diagram illustrating a conventional power system operation training simulator.

[Explanation of symbols]

 1 Trainer man-machine device 2 Trainer man-machine device 3 Input / output processing unit 4 Control / operation / setting data storage unit 5 Binary data storage unit 6 Numerical data storage unit 7 System configuration creation processing unit 8 System configuration data storage unit 9 Frequency calculation unit 10 Power flow calculation unit 11 Power system response simulation unit 12 Calculation switching processing unit 13 Transient stability calculation unit 14 Transient stability calculation result storage unit 15 Transient stability calculation post-processing unit

Claims (1)

Claims: 1. A power system operation training simulator for simulating the response of the power system and for training a power system operator, in a steady state, frequency calculation and power flow calculation are performed,
Calculation method switching means for switching the calculation method to perform transient stability calculation for several seconds after the start of the accident occurrence simulation, means for calculating the values of system frequency, generator output and load by frequency calculation, and transmission line power flow by power flow calculation And a means for calculating the bus voltage, a means for calculating the state quantity and node voltage of the generator by transient stability calculation, and a system frequency, a generator output, a load value, a transmission value based on the transient stability calculation result. An electric power system operation training simulator comprising means for calculating power flow and bus voltage and simulating the reaction of a step-out separation relay, and means for simulating the reaction of power system equipment.