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Method for power maintenance through transient power stop and transient stop selective reclosing circuit

A reclosing and circuit technology, applied in circuit devices, AC network circuits, electrical components, etc., can solve problems such as fault-free line power outages, and achieve the effect of reducing power outage time and shortening power outage time.

Active Publication Date: 2015-04-08
STATE GRID CORP OF CHINA +1
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AI Technical Summary

Problems solved by technology

This process generally takes 1-3 minutes, which artificially causes a power outage on the non-faulty line

Method used

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  • Method for power maintenance through transient power stop and transient stop selective reclosing circuit

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Embodiment Construction

[0014] Such as figure 1 As shown, an instantaneous power failure selective reclosing circuit, which includes a bus 1 and at least one branch line 2, each branch line is equipped with a time relay normally open switch 3, where the time relay normally open switch 3 acts as a circuit breaker switch.

[0015] The above-mentioned normally open switch 3 of the time relay is connected in series with the current transformer 7 and the intermediate relay 5, and the normally closed contact 4 of the intermediate relay is connected in parallel at both ends of the normally open switch 3 of the time relay and the intermediate relay 5, and the normally closed contact 4 of the intermediate relay Connect time relay 8 in series.

[0016] The above-mentioned current transformer 7 is connected with a remote controller, which is convenient for remote staff to carry out real-time monitoring.

[0017] The above-mentioned current transformer 7 is also connected with the data display unit, which is co...

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Abstract

Provided are a method for power maintenance through transient power stop and a transient stop selective reclosing circuit. The transient stop selective reclosing circuit comprises a bus and at least one branch line. Each branch line is provided with a time relay normally open switch which is connected in series with a current transformer and an intermediate relay; an intermediate relay normally closed contact is connected in parallel to the two ends of the time relay normally open switch and the intermediate relay; and the intermediate relay normally closed contact is connected in series with a time relay. The beneficial effect is that whether a line is a faulty line can be judged on an integrated computer platform according to the switching time of circuit breaking operation for inspection. In the process, the power-off time of a circuit without faults is shortened to 1-5 seconds, thus reducing the power outage time for the society.

Description

technical field [0001] The invention relates to a momentary stop selective reclosing device of a power system, in particular to a momentary stop selective reclosing device in which a busbar drives a plurality of branch lines. Background technique [0002] At present, most of the 110KV and below substations in my country have realized comprehensive self-protection, and reclosing gates are installed in the lines. According to statistics, 10% of the failures are permanent failures and require manual maintenance. In many substations, one bus drives multiple sub-lines. When the bus is grounded, it is impossible to directly determine which sub-line is faulty. The method adopted is still the traditional instantaneous power failure grounding option, that is, the lines are disconnected one by one according to the sequence arranged in advance, after disconnection, check whether the fault disappears, and then transmit power. This process generally takes 1-3 minutes, which artificiall...

Claims

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Application Information

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IPC IPC(8): H02J3/00G01R31/08
CPCG01R31/086H02J3/00
Inventor 林晓朋王晓燕滑冰冯灵坤刘朝辉
Owner STATE GRID CORP OF CHINA
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