Method and device for judging non-all-phase opening of a switch

Abstract

The invention discloses a method and apparatus for judging switch non-full-phase opening. The method comprises the steps of collecting real-time operation data of a grid switchgear, wherein the real-time operation data comprises position change information of the switchgear; if the position change information of the switchgear is received as an open position, determining whether the switch open position operation is a remote control operation for scheduling an automation main station; if the switch open position operation is determined to be a non-remote-control operating for scheduling the automation main station, recording the type and the opening time of the switchgear as the opening information of the switchgear and recording the opening information into an opening queue; and if the opening time of the switchgear continues to a predetermined threshold, starting switch non-full-phase opening judging; if it is determined that the current switchgear is in non-full-phase opening, generating a non-full-phase opening brief report of the current switchgear, giving an alarm and carrying out display. The invention also discloses an apparatus for judging switch non-full-phase opening to realize the above method. The method and apparatus of the invention effectively puts an end to electric power accidents due to loaded disconnecting link pulling in the switch non-full-phase opening.

Description

technical field [0001] The invention relates to the technical field of power grid dispatching, in particular to a method and device for judging non-all-phase opening of a switch. Background technique [0002] With the completion of the integration reform of prefectures and counties, more and more factories and stations are connected to Chaozhou dispatching automation system, the jurisdiction of dispatching and monitoring covers the whole city, and more and more phase separation mechanisms are used, resulting in non-full phase opening of circuit breakers The problem should also attract the attention of the dispatching personnel. [0003] In the current dispatching automation system, the switch position remote signaling signal of 220KV and above has switch three-phase combined position signal and single-phase position signal, and the switch position remote signal signal of 110KV and below only has switch three-phase combined position signal. The three-phase merged position re...

AI Technical Summary

Problems solved by technology

As long as one phase of the three-phase switch is open, the signal of the automation system will show that the "closed position" is in the open state, and the "fen position" is in the closed state. It is impossible to identify whether the switch is all three-phase open or individual phase open.

If the non-full-phase opening of the switch cannot be detected in time, there may be an electrical accident with load pulling the switch

Although the three-phase current of the line marked in the wiring diagram can be used by the dispatcher to monitor the phenomenon of non-full-phase opening of the switch, this phenomenon may be ignored during busy operations

In addition, when the AVC system automatically controls the capacitor, the phenomenon of non-full-phase opening of the capacitor switch cannot be detected in time by relying on the three-phase current of the marked line in the wiring diagram

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