JPH0789699B2 - Reclosing device - Google Patents

Description

TECHNICAL FIELD OF THE INVENTION The present invention determines the time when a condition is not satisfied by determining whether the reclosing device, in particular, the activation signal from a protection relay panel or the activation due to detection of a total stoppage. The present invention relates to a reclosing device that can be set individually.

[Technical background of the invention] In the conventional reclosing device, there are two starting conditions, that is, starting from a protective relay board as a starting condition of the device, and starting itself after cutting off C / B due to detection of total stop. There are two starting conditions, and when confirming the C / B closing conditions after starting, when a closing condition is not satisfied, a common value is used for setting the condition non-fulfillment time. In this case, a value suitable for the reclosing operation after the activation from the protection relay board is usually set.

FIG. 2 is a block diagram of a conventional reclosing device system. The operation of the conventional device will be described with reference to FIG. That is, as a starting condition of the device, first, an accident of the transmission line 1 or the bus 2 is detected, and the breaker 3 is cut off to input an operation signal from the protection relay board 4 for separating the system from the accident as a starting signal. In some cases, it is taken in from the unit 5 and an activation input is given to the activation unit 6. Also, as another start condition,
Transmission line 1 provided that circuit breaker 3 is "ON"
(Voltage obtained via the PT _L) and bus second voltage (P
It is confirmed by the total stop detection unit 7 via the input unit 5 that both of the voltages obtained via T _B ) are both “absent” for a certain period of time. There is a case in which the output unit 10 gives a control circuit 11 a breaking command to the circuit breaker 3 and a starting input to the starting unit 6.

Here, the sequence unit 8 starts the reclosing operation when receiving the signal from the starting unit 6, but first, when the closing condition of the circuit breaker 3 is not satisfied, the sequence unit 8 resets the device at a constant time. The value giving time, that is, the condition non-establishment time is set by the setting unit 9, and the closing condition is confirmed after the non-voltage time elapses. Therefore, if the closing condition is continuously satisfied for a certain period of time within this condition not being satisfied, it is considered that the condition is satisfied, and the closing command of the breaker 3 is output to the control circuit 11 via the output unit 10. If the closing condition is not satisfied during the time when the condition is not satisfied, it is considered that the condition is not satisfied and the device is reset.

[Problems of Background Art] In the conventional device having the above configuration, when the value of the condition non-satisfaction time is selected, the value of the giving up time when starting from the protection relay board 4 is selected. The closing operation may be insufficient in comparison with the time required for full stop recovery from the high level system, and the device may be easily reset despite the full stop recovery process.

Therefore, the advent of a reclosing device having a function capable of setting an individual condition non-establishment time corresponding to a system fault state (starting condition) has been desired.

[Object of the Invention] The present invention has been made to solve the above problems, and provides a reclosing device having a function capable of setting an individual condition non-establishment time corresponding to a system fault condition. It is an object.

[Summary of the Invention] The present invention is provided with a function that can identify whether the shutdown start is due to all stops or the start from the protection relay board, and can individually set the condition non-establishment time at the time of confirming the closing condition, so as to be suitable for the start condition. It is possible to perform various reclosing processing.

Embodiments of the Invention Embodiments will be described below with reference to the drawings. FIG. 1 is a block diagram of an embodiment of a reclosing device according to the present invention. In FIG. 1, the same parts as those in FIG. 2 are designated by the same reference numerals and the description thereof will be omitted. In FIG. 1, reference numeral 13 denotes a memory unit for distinguishing between the interruption start-up by all stops and the start-up by a protection relay board, and is composed of a memory 14 and a memory 15. The memory 14 receives and stores the activation signal from the all-stop detection unit 7, and the memory 15 stores the activation signal from the protection relay board 4. Then, the condition non-fulfillment time setting unit 9 in the sequence unit 8 inputs the contents of each memory and sets the giving up time at the time of non-fulfillment of each closing condition in accordance with the contents which are the identification result of the activation. Other configurations and operations are the same as those in FIG.

Therefore, at the time of reclosing, the condition non-establishment time having an individual value suitable for each starting condition can be set by the starting condition storage signal from the memory unit 13.

The following operation is for confirming the closing condition for each start during each condition non-establishment time, and it is possible to maintain sufficient time required for full stop recovery even at interrupt start due to all stop.

[Effects of the Invention] As described above, according to the present invention, it is possible to set different condition non-establishment times in the case of activation by the protection relay panel and in the case of interruption activation by the total stop. It is now possible to set the time to give up according to the state of the system fault, and even when the circuit is closed and restarted after a shutdown, the time required to restore the complete stop can be taken sufficiently to prevent the device from being reset easily and to shut down. It is possible to improve the reclosing rate of the container.

[Brief description of drawings]

FIG. 1 is a configuration diagram of an embodiment of a reclosing device according to the present invention, and FIG. 2 is a configuration diagram of a conventional reclosing device. 1 ... Transmission line, 2 ... Busbar, 3 ... Circuit breaker, 4 ... Protective relay panel, 5 ... Input section, 6 ... Starting section, 7 ... Total stop detection section, 8 ... Sequence section, 9 ... Conditions Failure time setting part, 10 ... Output part 11 ... Control circuit, 12 ... Reclosing device 13 ... Memory part, 14, 15 ... Memory

Claims (2)

[Claims] 1. A reclosing device for receiving a first reclosing activation signal output in response to an operation output from a protection relay panel or a second reclosing activation signal output when a total stop is detected, and performing a reclosing activation. Means for identifying which of the first and second reclosing circuit activation signals is established, and giving up time when the closing condition is not satisfied for each of the first and second reclosing circuit activation signals according to the identification result. A reclosing device comprising: a setting means for setting 2. The reclosing device according to claim 1, wherein the reclosing circuit is set corresponding to the second reclosing starting signal from a give-up time set corresponding to the first reclosing starting signal. A reclosing device characterized in that the giving up time is set longer.