JPH0341004B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a power system simulator device, and particularly to a power system simulator device that simulates state changes of power system equipment using an electronic computer.

[Technical background of the invention]

In general, a power system simulator device is used to train operators and perform preliminary analysis by simulating an accident.For accident simulation, it is necessary to set the accident state in the power system simulator device in advance. Therefore, in conventional simulator devices, the connection state of the power system and the status changes of each device are individually set.

[Problems with background technology]

According to the conventional method described above, when setting an accident, the person setting up the accident must identify all the state-changing devices necessary for the accident, and set the state-changing settings for each of them individually. This required a lot of effort and time. Furthermore, since there are a large number of settings, it is easy to make setting mistakes. Furthermore, since the creation of status change procedure settings is done at the discretion of the setter, a setter who is skilled in the field of power systems is required. Moreover, in recent power systems that have become larger and more complex, it has become necessary to set more and more accident conditions. Since the situation change procedure is created before the simulation is executed, it is possible for a temporary accident to occur, but in the case of a permanent accident, a permanent accident can be caused by assuming the on/off state of the disconnector during the simulation. After power is transmitted to a point, the protection relay must be operated immediately after the power is turned on, and the circuit breaker must be tripped, which is extremely difficult.

[Purpose of the invention]

The present invention was made with the aim of solving the above-mentioned problems, and an object of the present invention is to provide a power system simulator device that has a simple setting method, reduces the burden on the setter, and prevents setting errors. It is said that

[Summary of the invention]

In the present invention, equipment necessary for the occurrence of an accident is determined by referring to power system connection information and power system protection relay information that are determined in advance, and a trip state and an operational state of a protection relay are detected for the target equipment. In the case of a permanent accident, pressure is applied again to open the breaker, and in the case of a temporary accident, the fault point is restored after a trip and a change in the operation of the protective relay. be.

[Embodiments of the invention]

Examples will be described below with reference to the drawings. FIG. 1 is a block diagram of an embodiment of a power system simulator device according to the present invention. In Figure 1, 1 is an electronic computer, and 2 is a CRT used for input during simulation execution.
The device 3 is for monitoring and control, and is for human communication with the operator.
CRT device for machine interface, 4
is an actual power system, and the power system status change monitoring system control processing unit (hereinafter referred to as the status change monitoring processing unit) is processed via the actual power system status change determination control processing unit (hereinafter referred to as the actual power status change processing unit) 11 in the computer. 12). Reference numeral 13 denotes a simulated power system, which is a storage unit for storing power system states, such as the on/off state of a power cutter. The accident situation storage unit 14 is a storage unit for accident information set by the CRT device 2, and the condition change monitoring processing unit 12 is also connected to the power system 4.
It has the function of monitoring and controlling the actual power system. A power system connection state storage unit (hereinafter referred to as the state storage unit) 15 is a storage unit for connection information between each device in the power system, and a power system protection relay information storage unit (hereinafter referred to as the relay information storage unit) 16 is a storage unit for each protection relay. 17 is an electric power system simulation processing section (hereinafter referred to as simulation processing section).

Next, the relationships among the above-mentioned devices will be summarized.

The actual power system 4 is monitored by the actual power status change processing unit 1.
1 and the status change monitoring processing unit 12, the information is displayed on the CRT device 3 for monitoring and control, which performs a man-machine interface with the operator.

The actual power system 4 is controlled by a CRT for monitoring and control.
The information is input from the device 3 and is performed through the reverse route to that used for monitoring.

In addition to the above-mentioned device, the present invention is configured by an electric power system simulation processing section described below.

The simulation system is inputted from the simulation CRT device 2 and stored in the simulation power system 13 via the simulation processing section 17, thereby creating a simulation system.

To set an accident, a simulated accident point, accident type, temporary accident or permanent accident is set from the simulation CRT device, and recorded in the accident information storage section 14 via the simulation processing section 17.

When an accident occurs, when simulation execution is set from the simulation CRT device 2, the simulation processing unit 17 retrieves the accident information from the accident information storage unit 14, and processes the simulation power system 13 into a trip state of the disconnection and protects it. Causes a change in relay operation.

After that, when the status change monitoring processing unit 12 is started,
The state change monitoring processing unit 12 refers to the simulated power system 13 and displays the occurrence of an accident on the monitoring and control CRT device 3.

If the accident is set as a permanent accident, the supervisory control
When the power supply circuit breaker is turned on by operation from the CRT device 3 or automatic operation by software in the computer, the power system simulation processing section 17 is activated by the state change monitoring processing section 12, and the power system simulation processing section 17 is activated. The processing unit 17 updates the on/off state in the simulated power system 13. Thereafter, the accident occurrence process is repeated, and if the accident point becomes pressurized, a trip-like deformation of the shingle breaker and a deformation of the protective relay are caused.

In the case of temporary accident setting, after the first occurrence of the accident situation, the accident point is restored, that is, the information on the accident point is erased, so that the situation does not occur again.

FIG. 2 shows an example of a simulated accident on a power transmission line, which will be explained using the flowchart in FIG.

First, the accident point J1 is set to the power transmission line L1, the accident type is set as a short-circuit permanent accident from the simulation CRT device 2, and a simulation execution command is input. In this case, in step 51, the power system simulation processing unit 17 searches for a protective relay or a disconnection corresponding to the accident type in the ON state where power is being transmitted to the fault setting point.
is connected to the bus B1 that is transmitting power to the protection relay corresponding to the short circuit of the accident type and the power transmission line L1 from the state storage unit 15, relay information storage unit 16, and simulated power system 13, and is connected to the bus B1 that is transmitting power to the power transmission line L1. Find the opening and disconnection C1. It should be noted that finding the shear breaker C1 can be easily realized by introducing the concept of node/branch used for tidal current calculations and the like. If it is determined in step 52 that a device is present, the process moves to step 53, where a trip state change in the shield breaker C1 and a change in the operating state of the protection relay are generated, and the process returns to step 51 to search for the target device again. Then, when the shield breaker C2 is determined, it is determined in step 52 that there is a device, and the process moves to step 53, where a trip state change of the shield breaker C2 and a change in the operating state of the protection relay occur. In this case, both the breaker C1 and C2 are open. Moreover, since it is a permanent accident setting, either the breaker C1 or the breaker C2 can be turned on by an operator's operation from the monitoring and control CRT device 3 or automatically by software in the computer. When the operation is performed, the power system simulation processing section 17 is activated by the state change monitoring processing section 12, and the accident point J1 is put into a pressurized state by re-turning on the power system. However, since it is set as a permanent accident, the breaker opens in step 53 and the failure occurs in step 5.
Return to 1. In this state, all the shields and disconnectors are open, so the process moves from step 52 to step 54, and at step 54, there is no temporary accident, so the process ends.

Next, in the case of a temporary accident setting, as in the case of a permanent accident described above, in step 51, the protection relay or disconnector corresponding to the accident type is searched for while the accident setting point is energized. Step 5
Move to step 2, and since there is a device, proceed to step 53.
This can lead to deterioration of the cut state of the disconnector. In this case, since it is a temporary accident, the target device does not exist even if the process returns to step 51, and the process moves from step 52 to step 54. In step 54, since it is a temporary accident, in step 55, the accident point is restored and the information on accident point J1 is erased, and the situation does not occur again.

The above explanation deals with short-circuit accidents in power transmission lines, but it is clear that the same method can be applied to ground faults as well. In addition, not only power transmission line accidents, but also busbar accidents, transformer accidents, etc. can be easily handled by the following.

Regarding busbar accidents, Figure 3 shows an example of a simulated busbar accident, which is a short-circuit accident.

In this case as well, similarly to the above-mentioned power transmission line, the fault point is set as the bus bar B3, the fault type is set as a short-circuit permanent fault, and the process is executed. Then, in step 51, the disconnector C that is transmitting power to the bus B3
4 and the protection relay, and in step 53, a trip state change in the shield breaker C4 and a change in the operating state of the protection relay are generated. In this case as well, if there are multiple disconnectors transmitting power, a change in status will occur for all disconnectors and the target protection relay, and the subsequent operation will be the same as above. It is.

Regarding transformer accidents, Figure 4 shows an example of a simulated transformer accident, which is a short-circuit accident.

In this case, as in the case of the power transmission line described above, the fault point is set as the transformer K1, and the fault type is set as a permanent short-circuit fault. Then, in step 51, the shield breaker C5 and the protective relay that are transmitting power to the transformer K1 are determined, and in step 53, a trip state change in the shield breaker C5 and a change in the operating state of the protective relay are generated. . The subsequent operations are the same as described above.

〔Effect of the invention〕

As explained above, according to the present invention, by specifying the accident situation change set point and the accident type, the equipment involved in the occurrence of the accident situation can be determined by referring to the power system connection information and the power system protection relay information. With this structure, it is possible to provide a power system simulator device that requires less setting information when an accident occurs, eliminates the need to identify equipment necessary for an accident, and can easily cause temporary and permanent accidents.

[Brief explanation of drawings]

Fig. 1 is a block diagram of an embodiment of the power system simulator device according to the present invention, Fig. 2 is an example of a simulated accident on a transmission line, Fig. 3 is an example of a simulated accident on a busbar, and Fig. 4 is an example of a simulated accident on a transformer. The example diagram, FIG. 5, is a flowchart for explaining the operation. 1...Electronic computer, 2...Simulation CRT device,
3...CRT device for monitoring and control, 4...Power system,
11...Actual power system state change determination control processing unit, 12...
...Power system status change monitoring system control processing unit, 13...Simulation power system, 14...Accident situation storage unit, 15...
...Power system connection state storage unit, 16...Power system protection relay information storage unit, 17...Power system simulation processing unit, C1-C6...Shipping switch, B1-B4...Bus bar, S1-S4... Switch, K1...Transformer.

Claims (1)

[Claims] 1. In a power system simulator device that simulates power system fault conditions using a simulated power system,
A simulated power system that stores the on and off states of power disconnectors, an accident information storage section that stores the accident point, accident type, temporary accident or permanent accident, and connection information between each machine in the power system. A power system connection state storage unit, a power system simulation processing unit that creates a simulation system by setting simulation inputs, a system control processing unit that performs supervisory control, a simulation input device, and a supervisory control device are provided. When specifying the accident situation change set point and accident type via the simulation input device, the equipment required for the accident situation occurrence is determined by referring to the power system connection information and the power system protection relay information, and the relevant A power system simulator device characterized by generating a trip state change in equipment and a change in the operation state of a protective relay.