JP3121647B2 - Power system operation training simulator - Google Patents

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 that simulates the response of a power system and trains trainees (hereinafter referred to as trainees) in system operation.

[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 aimed at training trainees at the dispatch center and the general control center. The instructor (hereinafter referred to as trainer) sets the accident information such as the time of the accident, the accident point, the accident situation, etc., sets the initial system data, and changes the state of the initial system through the man-machine system. Performs the monitoring and control of the system via the man-machine device, and the system simulation unit simulates the response of the power system to the operation of the trainer and trainee,
This creates a situation where the trainee is monitoring and controlling in the actual system. Hereinafter, the conventional method will be described with reference to the drawings. FIG. 3 is a functional block diagram showing a configuration of a conventional power system operation training simulator. 1 is a man-machine device for trainers, 2 is a man-machine device for trainees, 3 is a system simulation monitoring / control unit, 4 is a simulator data storage area, and 5 is a power system response simulation unit. The trainer passes through the trainer man-machine device 1,
The training is started by setting the accident information, setting the initial system data for training, and changing the initial system as necessary.
The system simulation monitoring and control means 3 stores the initial data set by the trainer via the man-machine device 1 in the simulator data storage area 4, and thereafter, the power system response simulation means 5
Start The initial data includes various data necessary to simulate the response of the power system.

[0003] The power system response simulation means 5 is based on data stored in the simulator data storage area 4 and numerical information such as the frequency, voltage distribution, load power, generator output, line power flow and the like in the power system that changes every moment. (Hereinafter referred to as TM) to represent the response of the relay and the associated state change 2
Simulation of value information (hereinafter referred to as SV) is performed, and such information is stored in the simulator data storage area 4. or,
The power system response simulating means 5 generates a set accident at the time of the accident according to the accident information. At this time, the calculation of the TM value, the simulation of the response of the relay, and the simulation of the SV are similarly performed, and these results are stored in the simulator data storage area 4.
To save. After saving the data, system simulation monitoring and control means 3
To restart. The system simulation monitoring / control unit 3 retrieves the TM information and the SV information saved by the power system response simulation unit 5 from the simulator data storage area 4 and displays them via the trainer man-machine device 1 and the trainee man-machine device 2. And inform the trainer and trainee of the current state of the power system.

The trainee is a man-machine device 2 for trainees.
To monitor the state of the system via the Internet, and consider and implement a method for operating the power system stably and economically. This is to improve the monitoring and control ability of the trainee, that is, this is training. The operation of the trainee is performed via the trainee man-machine device 2 and is reflected in the simulator data storage area 4 by the system simulation monitoring / control means 3. After that, the power system response simulating means 5
Is activated, and the response of the power system to the operation of the trainee is simulated, and the result is displayed via the man-machine device 1 for trainer and the man-machine device 2 for trainee.
The trainer sets an accident through the trainer man-machine device 1 or changes the load power and the generator output in order to simulate local response to a trainee command. The operation of the trainer is reflected in the calculation in the same procedure as the operation of the trainee, and is displayed via the trainer man-machine device 1.

[0005]

When various accidents such as a one-line ground fault or a short circuit between lines occur in a transmission line or a substation of an electric power system, the state of the system and the response of various relays such as a protection relay are controlled. In order to simulate strictly, it is necessary to perform a fault calculation and calculate the voltage and current of each of the three phases, but the amount of calculation is large and the calculation time is required. In a normal simulation, a simulation calculation during training is executed at intervals of several seconds in order to inform the trainee of the state of the power system in real time. For this reason, due to the limitation of the calculation time, an approximation calculation for all three phases is performed, and the amount of calculation is reduced to maintain the real-time property.
As a calculation method of the simulation calculation, there is a method in which a transient stability calculation or a more simplified frequency fluctuation calculation and a power flow calculation are combined.

However, since these are all approximate calculations, if the response of the power system to an accident is simulated based on the calculation results by these methods, it may not match the actual response of the power system. Sometimes it was difficult to do so. Further, when the failure calculation is incorporated as it is in order to perform the calculation strictly, the amount of calculation is so large that the real-time performance of the simulation calculation cannot be maintained. The present invention has been made in order to solve the above-mentioned problems, and usually simulates the response of a power system using a conventional method, and details the state of the power system at the time of occurrence of an accident and during the accident by using a failure calculation. The purpose of this study is to provide a simulator for power system operation simulation.

[0007]

In order to achieve the above object, according to the present invention, in addition to the conventional power system operation training simulator, during the training, the conventional power system response simulating means is normally activated to prevent an accident. Simulation switching means that activates the accident detail simulation means until the occurrence and removal of the accident, and failure calculation is incorporated into the stability calculation at the time of the accident to calculate the state of the system at the time of the accident in detail, and to obtain detailed calculation results Calculate the TM value based on
In response to the relay, the simulation of SV generation accompanying the relay is performed, and an accident detail simulation means for storing such information in a simulator data storage area is added.

[Function] After the trainer performs an operation of setting an accident, setting initial system data, and changing the state of the initial system via a man-machine device, the trainer performs system simulation monitoring and
Activate the control means. Thereafter, the simulation switching means is activated by the system simulation monitoring / control means. The simulation switching means activates the conventional power system response simulation means until an accident occurs and after the accident is cleared. When the power system response simulation means is started, the power system response simulation is performed in the same manner as in the conventional method. When an accident occurs, the simulation switching unit activates the accident detail simulation unit until the accident is eliminated. The accident detail simulation means generates an accident at the time of the accident occurrence, and performs a simulation calculation by a stability calculation incorporating a failure calculation until the accident is eliminated by a protection relay or the like.
The M value is calculated, the response of the relay and the associated SV generation information are simulated, and the information is stored in the simulator data storage area. The SV / TM information stored in the simulator data storage area is displayed on the trainer man-machine device and the trainee man-machine device via the system simulation monitoring / control means. Further, the calculation result of the accident detail simulation means written in the simulator data storage area is carried over to the simulation calculation of the power system response simulation means after the removal of the accident.

[0008]

An embodiment will be described below with reference to the drawings. FIG.
1 is a functional block diagram of an embodiment for explaining a power system operation training simulator according to the present invention. In FIG. 1, the same portions as those in FIG. 3 are denoted by the same reference numerals, and detailed description is omitted. In FIG. 1, reference numeral 6 denotes a simulation switching unit that normally activates the power system response simulation unit 5 during training, and activates the accident detail simulation unit 7 during the period from the occurrence of the accident to the elimination of the accident.
Is a detailed accident simulation means that simulates in detail the response of the power system at the time of an accident using a failure calculation and a stability calculation, and stores the result in a simulator data storage area. Other configurations are the same as those in FIG.

Next, the operation will be described. In this embodiment, a stability calculation incorporating a failure calculation into a power system operation training simulator is performed to simulate the power system response at the time of an accident in detail, and an accident detail simulation means 7 for storing the result is added. This makes it possible to notify the trainer and the trainee of the strict response of the power system at the time of the accident and during the accident while maintaining the real-time performance of the training. Although the calculation method itself is not particularly aimed at in the present invention, the outline is as follows. In the stability calculation, the power system is normally modeled by three phases collectively, and the state of the power system is analyzed by solving an algebraic equation representing a relationship between voltage and current and a state equation representing a generator and its control system.
The stability calculation thus includes the voltage calculation processing unit and the generator state calculation processing unit. In the present invention, a failure calculation is incorporated in the voltage calculation processing unit, and the voltage and current at the time of an accident are strictly calculated. In the failure calculation, the power system is divided into zero-phase, positive-phase, and negative-phase symmetric sub-circuits using the symmetric coordinate method, and the symmetrical voltages and currents are calculated for each. These are combined to calculate the three-phase voltage and current of each part of the system. After calculating the three-phase voltage and current by the failure calculation, the response of the generator is analyzed by using the generator state calculation processing unit of the stability calculation.

Hereinafter, newly added components will be described with reference to FIGS. 1 and 2. FIG. The trainer sets and operates data required for training via the trainer man-machine device 1. The setting data and operation procedure are the same as the conventional method. The system simulation monitoring / control means 3 is started in the same manner as in the conventional method. Then, system simulation monitoring and control means 3
The simulation switching means 6 is activated. The simulation switching means 6 normally activates the power system response simulation means 5 and activates the accident detail simulation means 7 until an accident occurs and is eliminated. The accident detail simulation means 7 uses the simulator data stored in the simulator data storage area 4 to combine the failure calculation and the stability calculation with a combination of the failure calculation and the stability calculation until the accident is eliminated to eliminate the power system response. Simulate.

FIG. 2 is a flowchart showing the processing contents of the accident detail simulation means 7. In step S1, a zero-phase, positive-phase, and negative-phase circuit representing a power system is created. In step S2, the pre-fault voltage / current load impedance of the positive-phase circuit is obtained by a normal power flow calculation method.
In step S3, for each of the symmetric sub-circuits, the symmetric sub-impedance viewed from the fault point is determined. In step S4,
A symmetrical branching circuit corresponding to a fault type such as a ground fault is configured to obtain a fault point voltage / current. In step S5, for each symmetrical branch circuit, the distribution of symmetrical voltages and currents in each part of the system is calculated, and this is superimposed on the pre-fault power flow obtained in step S2 to obtain the voltage and current of each part in the system at the time of failure. In step S6, the state of the generator is calculated by solving the state equation of the generator. Steps S1 to S5 are the failure calculations. In step S7, a TM value is calculated in response to the calculation results in steps S1 to S6, and the response of the relay and the simulation of the accompanying SV are performed. In step S8, the simulation result of step S7 is stored in the simulator data storage area. By using the detailed accident simulation means 7, the response of the power system from the occurrence of the accident to the elimination of the accident is simulated in detail. This result is stored in the simulator data storage area 4. The result stored in the simulator data storage area 4 is passed to the power system responsive simulation means 5 started by the simulation switching means 6 after the accident is eliminated. After the removal of the accident, simulation is performed in the same manner as in the conventional method.

[0012]

As described above, according to the present invention, according to the present invention, the response of the power system is normally simulated by the conventional method, and the state of the system at the time of the accident is calculated in detail during the time from the occurrence of the accident to the elimination of the accident. In this way, by incorporating the failure calculation, the response of the power system in the event of an accident can be simulated in detail, and the result can be transmitted to the trainee, so that a realistic training can be performed. In addition, since the simulation is performed by a normal method except when an accident occurs and the accident continues, the response of the power system to the operation of the trainer and the trainee can be simulated in real time.

[Brief description of the drawings]

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

FIG. 2 is a flowchart showing a flow of processing of an accident detail simulation means.

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

[Description of Signs] 1 Man-machine device for trainer 2 Man-machine device for trainee 3 System simulation monitoring and control means 4 Simulator data storage area 5 Power system response simulation device 6 Simulation switching device 7 Accident detail simulation device

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) G09B 9/00 H02J 3/00

Claims (1)

(57) [Claims] 1. A simulator data storage area for storing various data necessary for a power system operation training simulation, and the operation of a trainee and an instructor are reflected in the simulator data storage area, and a simulation result of the power system is transmitted to a man-machine device. display via the system simulating monitoring control unit, in the stain <br/> Yuretadeta consisting of data saved in the save area and power system response simulator means for simulating the status of the power system power grid operator training simulator, usually Launch at times
Approximate calculation for all three phases
Reduced power to simulate power system response in real time
System response simulation means and the accident occurrence until the accident is eliminated
, Start using the fault calculation and stability calculation
Accident detail simulation means for simulating power system response in detail
And a simulation switching means for switching the respective means.