JP2645200B2 - 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 for simulating a power system in real time and training power system operation in a normal state and an accident state.

[0002]

State quantity of the Related Art power system (bus voltage and transmission line power flow) the matrix representing the connection state of the system by the impedance or admittance of the branch connecting between nodes and node (hereinafter, node called Y _bus matrix as an example An admittance matrix will be described as an example.) By using a computer to perform arithmetic processing. If there is no time limit in this calculation, the source nodes set at both ends of the switchgear provided for each power facility and the Y _bus matrix data expressed by the branches connecting the source nodes are used. Can be used to calculate the state quantity. However, since the power system training simulator needs to simulate the response of the power system in real time, it was impossible to use the network model of the large-scale system as it is for calculating the state quantity. Therefore, the conventional power system training simulator, when recognizing the connection state of the network, investigates the switching state of each switch, and when each switch is in the closed state, the source node at each end of the device and the section of each device are connected to one. By reducing the number of nodes by reducing the number of nodes, the size of the Y _bus matrix of the network model is reduced, and the calculation of the state quantity is speeded up.

Hereinafter, a conventional method will be described with reference to the drawings. FIG. 4 is a functional block diagram showing a configuration of a conventional power system operation training simulator. In the figure, 1 is a power system response simulation means, 2 is a simulator data file,
3 is a simulated system monitoring and control means, 4 is a trainee (trainee)
5 is a system connection state recognizing means by Y _bus matrix creation, 6 is a system state quantity calculating means, 7 is an accident generating means, and 8 is a man-machine apparatus for a trainer (trainer). The trainee performs training using the simulated system monitoring and control means 3 via the trainee man-machine device 4. The control data for the system operation performed by the trainee via the trainee man-machine device 4 is stored in the simulator data file 2 by the simulated system monitoring and control means 3. or,
Switch-on / open state data, 43SW state data, relay response data (hereinafter referred to as SV data), generator output value, load value, bus voltage, transmission line power flow TM
System status data such as data) is processed by the simulated system monitoring and control means 3 and the trainee man-machine device 4
To be provided to the trainee.

[0004] The control data for system operation performed by the trainer through the trainer man-machine device 8 is transmitted to the simulator data file 2 by the power system responsive simulation means 1.
Is stored in When the train operation is performed by the trainee or the trainer, and when the trainer starts the system fault through the fault occurrence means 7, the control data by the trainer and the trainee is transmitted from the simulator data file 2 by the power system response simulating means 1 Retrieved and processed. At this time, the system connection state recognition means 5 by creating the Y _bus matrix
Upon receiving the notification of the change of the system connection state from the power system response simulation means 1, based on the state data of each switching device stored in the simulator data file 2, the connection state data of all the systems is created, and the connection state data is generated. On the other hand, Y _bus matrix data is created by performing degeneration processing and stored in the simulator data file 2.
Start The system state quantity calculation means 6 inputs the Y _bus matrix data from the simulator data file 2 and also inputs the generator and load data from the simulator data file 2 to calculate the system state quantity, and saves it in the simulator data file 2. Then, the power system response simulation means 1 is started. The SV data and TM data stored in the simulator data file 2 are taken out using the power system responsive simulation means 1 and provided to the trainer via the trainer man-machine device 8.

[0005]

As described above, in the system for degrading the network model of the power system to speed up the calculation of the state quantity, when the switching state of the switching device changes due to an accident or system operation, each time, performs the reduction process, a large Y _bus matrix in large systems with without performing the creation redone Y _bus matrix requiring a tough time must not, when a change of the system due to an accident occurs continuously In addition, there was a problem that it was not possible to simulate the response of the power system in real time. The present invention has been made in view of the above circumstances. Even if the open / close state of the switchgear changes, if a new degenerate node is not generated or the degenerate node does not disappear, Y
_The trainer does not recreate the _bus matrix, but also performs the partial Y _bus matrix correction only on the degenerate nodes whose connection state has changed due to the change of the open / close state of the switchgear. By reducing the generation and disappearance of degenerate nodes due to the accident set to
_The purpose of the present invention is to provide a power system operation training simulator with an improved calculation speed while suppressing the necessity of re-creating a _bus matrix.

[0006]

In order to achieve the above object, in the present invention, a power system training simulator is configured as shown in FIG. 1 to generate a new degenerate node or generate a degenerate node even when the open / close state of the switchgear changes. when the disappearance of does not occur, the grid-connected state recognition means 9 by Y _bus matrix modified to correct the Y _bus matrix to investigate the degenerate node divided by the scheduled accident that previously divided and virtual branch Accident setting means 10 to set a temporary branch
Was added.

In FIG. 1, first, the connection state in the initial state of the power system to be simulated from the trainer and accident information indicating the location and type of the accident set are input via the trainer man-machine device 8. The switching device (hereinafter referred to as CB) that performs a shutoff operation in the event of an accident is determined by the operation relay determination function of the accident setting means 10. When the generation of a new degenerate node occurs in the network model after the degeneration process is performed due to the cutoff of the CB,
Degeneration of the primitive nodes at both ends of the CB is prohibited, and connection is made by a virtual branch. Y based on this network information
creating a training starting Y _bus matrix by grid-connected state recognition unit 5 by _bus matrix generation. When the accident is actually activated during the training, the CB is cut off. However, only the state of the virtual branch connecting the degenerate nodes at both ends of the CB changes from the connected state to the open state, and the new generation of the degenerated node is not performed. Since this does not occur, the Y _bus matrix is corrected by the system connection state recognition means 9 by correcting the Y _bus matrix.

[0007]

An embodiment will be described below with reference to the drawings. FIG.
FIG. 1 is a configuration diagram of an embodiment illustrating a power system training simulator according to the present invention. In FIG. 1, the same parts as those in FIG. In FIG. 1, reference numeral 9 denotes a system connection state recognizing unit based on Y _bus matrix correction, and 10 denotes an accident setting unit. Other configurations are the same as those in FIG. The functions of the newly added components will be described below. When the trainer sets an accident via the trainer man-machine device 8 before the start of training, the accident setting means 10 sets a virtual branch when a new degenerate node is predicted to be generated when the set accident occurs. The accident setting data added and processed so as to prevent the generation of a new degenerate node is stored in the simulator data file 2. The accident setting data is obtained during the training, after the set time elapses from the start of the training, or by the trainer through the trainer man-machine device 8, the accident generating means 7 is activated, and the accident generating means 7 further simulates the power system response. When the means 1 is started, it is extracted from the simulator data file 2 by the power system response simulating means 1 and is used for changing the network connection state data due to the occurrence of an accident.

During the training, when the trainee operates the system using the simulated system monitoring and control means 3 through the trainer man-machine device 4, the power system responsive simulating means 1 starts the simulated system monitoring and control means. 3 to activate the system connection state recognition means 9. Also, when the trainer activates the power system response simulating means 1 via the trainer man-machine device 8 to operate the system, or the accident generating means 7 activates the power system response simulating means 1 to cause an accident. Also in this case, the system connection state recognizing unit 9 is activated by the power system responsive simulation unit 1. The system connection state recognizing means 9 is activated by the power system response simulating means 1 when each switchgear operates and the connection state of the system changes, extracts network connection state data from the simulator data file 2 and performs new degeneration. It is determined whether or not a node has been generated or the degenerate node has disappeared. If no new degenerate node has been generated or the degenerate node has not disappeared, the Y _bus matrix is corrected and saved in the simulator data file 2. . Others are the same as FIG.

FIG. 2 is an explanatory diagram showing a node / branch degeneration method performed by the system connection state recognizing means 9 according to one embodiment of the present invention. In the figure, 11 is a bus, 12 is a transmission line, 13 is a section between switchgears, 14 is a closed CB (hereinafter referred to as a bus tie CB) connecting the buses, 15 is a disconnector (hereinafter referred to as LS), and 16 is a CB , 17 are open tie CBs, 20 is a node, 21 is a branch, and 22 is a virtual branch. In the drawings, the same reference numerals indicate the same elements. At A, buses 11a and 11c having a busty CB14 in a closed state.
Are degenerated as the same degenerate node by the degeneration process, and the buses 11b and 11d having the busty CB17 in the open state are
Each of the buses on both sides of B17 is degenerated as another degenerated node. As a result, the node / branch model becomes like B. In the degenerate state, Busty CB14
Is cut off, the buses 11a and 11c connected via the bus tie CB14 are separated, so that after the accident, a new degenerate node is generated, and the Y _bus matrix must be recreated. Is required. Therefore, when the above-mentioned accident is set by the trainer,
The degeneration processing is performed on the buses 11a and 11c on both sides of 14 respectively.
, A node / branch model in which nodes 20a and 20b are connected by a virtual branch 22. When the bustie CB14 is cut off due to an accident in the degenerate state, the state of the virtual branch 22 is changed from the connected state to the released state. Thus, generation of a new degenerate node does not occur. Therefore, the node / branch model after the occurrence of the accident is E. Since no new degenerate node is generated or the degenerate node does not disappear before and after the occurrence of the accident, there is no need to perform the Y _bus matrix creation and redo, and the partial Y
_By correcting the _bus matrix, the system connection status after the accident can be recognized.

FIG. 3 is a flowchart of a procedure for recognizing a system connection state performed by the system connection state recognizing means 9 in one embodiment of the present invention. In FIG. 3, a step S1 performs a process for inhibiting the degeneration of a node if there is a degenerated node divided by the accident as a process for setting an accident. In step S2, degeneration processing is performed, and Y
Create a _bus matrix and create initial connection information for nodes and branches. Step S3 is a step of simulating the response of the power system. Step S4 is a special process for minimizing generation of a new degenerate node or disappearance of the degenerate node when the control data of step S3 is reflected in the network model. Step S5 is a step for determining whether to continue the processing (YES) or to end the processing (NO). If it is determined that the processing is to be continued (YES), the process proceeds to step S6. If it is determined that the processing has been completed (NO), the processing is terminated. S6 is a step for determining whether or not a new degenerate node has been generated or the degenerate node has disappeared by the processing of step S3. In step S7, if it is determined in step S6 that a new degenerate node has been generated or the degenerated node has disappeared (YES), Y _bus
This is a conventional step of re-creating the matrix and recognizing the connection state of the system. In step S8, when it is determined in step S6 that a new degenerate node has not been generated or the degenerate node has not disappeared (NO), the Y _bus matrix is corrected and the connection state of the system is recognized.
Steps S1 and S4 are performed so as to minimize the generation of a new degenerate node or the disappearance of the degenerate node.
Since the connection state change of most systems does not generate a new degenerate node or the disappearance of the degenerate node does not occur, the system connection state is recognized by correcting the Y _bus matrix in step S8. Thus, the operation time can be greatly reduced. When the processing in step S7 or step S8 is completed, the process proceeds to step S3 again, and a response simulation calculation of the power system is performed using the newly recognized system connection state data.

[0011]

As described above, according to the present invention, even if an accident set in advance for training occurs and the connection state of the power system changes due to a change in the opening / closing state of the switchgear, a new state can be obtained. Unless a degenerate node is generated or a degenerate node disappears almost, and a new degenerate node is not generated or a degenerate node disappears, the Y _bus matrix is not re-created. In addition, it is possible to perform the response simulation calculation of the power system without losing the real-time property.

[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 an explanatory diagram of a node / branch degeneration method according to the present invention.

FIG. 3 is a flowchart illustrating a method for re-creating a Y _bus matrix or performing a partial correction by determining the generation of a new degenerate node or the disappearance of a degenerated node when the system connection state is changed according to the present invention.

FIG. 4 is a block diagram illustrating a conventional power system operation training simulator.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Power system response simulation means 2 Simulator data file 3 Simulated system monitoring and control means 4 Man-machine device for trainee (trainee) 5 System connection state recognition means by Y _bus matrix creation 6 System state quantity calculation means 7 Accident occurrence means 8 Training Machine for trainers (trainer) 9 System connection status recognition means by correcting Y _bus matrix 10 Accident setting means

Claims (1)

(57) [Claims] 1. A power system simulating means for simulating the response of a power system in real time, and a simulated system monitoring and controlling means for displaying a state of the simulated system and transmitting operation and control signals of a trainee to the power system simulating means. In the power system operation training simulator consisting of, for the power equipment simulated by the simulated power system simulating means, matrix data was created based on the current switching state of the switchgear, and degeneration processing was performed on the matrix data. Means for creating a matrix and recognizing the connection state of the power system, and the connection state of the recognized power system is changed at the time of the occurrence of an accident, so that the entire rebuilding process including the process of degenerating the matrix data is performed. A power system operation training simulator comprising a power system model setting means for replacing a matrix data with a partial correction process.