JPS604659B2 - Power system centralized control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to circuit breaker operation in power systems.

Conventionally, when operating a circuit breaker, the method shown in FIG. 1 was used.

In FIG. 1, 1 is an operator console, 2 and 3 are remote monitoring and control devices, 4 is power system equipment, 10 is a control signal, and 11 is information on power system equipment.

In other words, the operator learns the status of the power system equipment 4 through the system monitoring panel, display, or telephone contact, determines whether the circuit breaker can be operated, and then performs the operation. Everything was left to the operator, and there was no function to prevent erroneous operation.

Here, the present invention provides that if a circuit breaker in a power system is disconnected due to an accident or failure, the circuit breaker is prohibited from operation, and when the circuit breaker is operated, if the circuit breaker is prohibited from operation. By prohibiting the operation of the circuit breaker, it is intended to provide a device that prevents the operator from operating the circuit breaker maliciously.

FIG. 2 is a schematic diagram of a control system to which the present invention is applied, and FIG. 3 is a block diagram of an embodiment of the present invention. 5 is a centralized control device for a power system according to the present invention; 12 is an operation request; 13 is operation permission information; 14 is operation prohibition information; 21
22 is an operation prohibition determining unit, 22 is an automatic operation prohibition setting unit, 23 is a device status storage unit, and 101 is a CRT display device.

That is, the present invention includes an operation prohibition determining section 21, an automatic operation prohibition setting section 22, and a device state storage section 23.

Thus, the opening/closing states of power system disconnectors and circuit breakers, the operating states of all electrical appliances, etc. are input to the device 5 of the present invention as information on the power system equipment 4 by the remote monitoring and control devices 2 and 3.

Now, the device 5 of the present invention operates when the state of the power system equipment 4 changes and determines whether the circuit breaker has accidentally tripped.

The circuit breaker that was shut off due to an accident is prohibited from being operated. Further, the device 5 of the present invention is configured so that an operator can use the operator console 1
operates when the circuit breaker is operated, and determines whether operation prohibition is set. If not, the remote monitoring control device 2 transmits a control signal for the circuit breaker, but if operation prohibition is not set. In this case, the control signal 10 is not transmitted, and the operator is alerted through the operator console 1.

For example, in a power system consisting of the A control switch 30, the B limit switch 31, the A bus line 32, the O bus line 33, and the circuit breaker 34 as shown in FIG. 4, when the state of the circuit breaker 34 changes from closed to closed, The automatic operation prohibition setting unit 22 operates.

The operation prohibition automatic setting section 22 determines whether the circuit breaker 34 was opened by an operator's command or due to an accident, and if the circuit breaker 34 was opened due to an accident, the circuit breaker 34 is set to prohibit operation. is set and saved in the device state storage section 23.

The operation prohibition determination unit 21 is operated by an operator using the operator console 1
When an attempt is made to operate the circuit breaker 34, the device state storage unit 2 determines whether the circuit breaker 34 is set to be prohibited from operating.
3 and determines the information, and if operation prohibition is set, informs the operator that it is a deliberate operation.

If operation prohibition is not set, operation of the circuit breaker 34 is permitted, and the remote monitoring control device 2 sends the control signal 1.
Send 0.

The operator can use the operator console to see whether the circuit breaker is set to be prohibited from operating.

For example, if the circuit breaker 34 in FIG. 4 is set to be prohibited from operation, this can be recognized by displaying it on the CRT display device 101, like the circuit breaker 35 in FIG. 5 where the operation is prohibited. Circuit breakers that have been set to be prohibited from operation cannot be operated until the operator releases the prohibition from the operator console after recovery from the accident.

As a result, the operating procedure for the circuit breaker that was shut off due to an accident is to confirm that the accident has been recovered, cancel the prohibition of operation, and then perform the operation to close the circuit breaker, which can reduce the number of times the operator has to accidentally close the circuit breaker.

By the way, the device 5 of the present invention operates symmetrically with respect to all circuit breakers to be controlled, and can also be realized by an electronic computer into which the status of the power system equipment 4 is input using an information transmission device. .

In this way, the present invention eliminates the need for deliberate operations by the operator, and prevents accidents from spreading in the event of an accident. Furthermore, electronic computers are often installed in the central control center of substations for other purposes, and the present invention can be implemented using these computers, which is extremely economical.

[Brief explanation of the drawing]

Fig. 1 is a block diagram of a conventional system, Fig. 2 is a block diagram of a system using the present invention, Fig. 3 is a schematic diagram of an embodiment of the present invention, and Fig. 4 is a schematic diagram of an example of a power system. , FIG. 5 is an explanatory diagram of an example of a CRT display when prohibition of the circuit breaker operation is set. 1... Operator console, 2, 3...
...Remote monitoring and control equipment, 4...Power system equipment,
5... Centralized control device for power system according to the present invention, 10
... Control signal, 11 ... Power system equipment information, 12 ... Operation request, 13 ... Operation availability information, 14 ... Operation Prohibited information, 21.
...Operation prohibition determination unit, 221...Operation prohibition automatic setting unit, 23...Device state storage unit, 30.
....A restriction switch, 31...B restriction switch,
32...Ko bus line, 33...Otsu bus line, 3
4... Circuit breaker, 35... Circuit breaker whose operation is prohibited, 101... CRT display device. Many z diagrams, many 2 diagrams, many 3 diagrams, many 4 diagrams, many 5 diagrams

Claims (1)

[Claims] 1. In a power system centralized control device consisting of a remote monitoring control device, an operator console, and an electronic computer system, the circuit breaker operates when its state changes from closed to open, and whether it is opened by an operator's command or due to an accident. an operation prohibition automatic setting section that determines whether the circuit breaker has opened and sets the circuit breaker to prohibit operation if the circuit breaker has opened due to an accident;
It is equipped with an equipment status storage unit that stores the determination, and an operation prohibition determination unit that operates when an operator console is attempted to operate, determines and displays the information in the storage unit, and operates on a circuit breaker that has been opened due to an accident. A centralized control device for an electric power system, characterized in that the following is prohibited: