The method of improving the five defenses of substations on the local side by using the information on the opposite side of the line

Abstract

The invention relates to a method for perfecting five preventions of an onside transformer substation by circuit offside information. An Ethernet plug-in unit is added in a telecontrol communication machine of each transformer substation, and an IP (Internet Protocol) address is distributed to a newly added Ethernet card of each telecontrol communication machine by a master station, so that the telecontrol communication machine of each transformer substation can receive data issued by the master station. The method comprises the following steps: an order is issued by the telecontrol communication machine of the onside transformer substation to the master station to call and transmit circuit disconnecting link position information of the offside transformer substation to the master station, and the circuit disconnecting link position information is used as one of the conditions for judging the onside circuit grounding switch position in onside transformer substation five-prevention logic judgment. According to the method disclosed by the invention, the onside grounding switch position is judged by obtaining the disconnecting link position information of the offside transformer substation from the master station, and the safety performance of the five-prevention operation can be improved.

Description

technical field [0001] The invention relates to a method for five defenses of a substation based on an intelligent five defense system, in particular to a method for improving the five defenses of a substation on the local side by using information on the opposite side of a line. Background technique [0002] At present, the five-defense system of the smart substation collects the position information of switches and switches inside the substation on the local side, as well as the real-time power telemetry information, as the condition for the five-defense logic judgment. Since current and voltage combined electronic transformers are generally used in smart substations to collect information such as the switch on the local side and the position of the line switch, there is no independent line voltage change information. It is used to judge whether there is voltage on the line, and there is a certain degree of uncertainty in obtaining the information on the local side through...

AI Technical Summary

Problems solved by technology

Since the electronic transformer usually adopts a combined electronic transformer, the installation position of the line pressure change of the smart substation is different from that of the traditional substation, not on the line side, so it cannot judge whether there is voltage on the line, and the sensing method has weather and sensing sensitivity False induction may occur due to influence of other factors, which will bring danger to the closing operation

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