A method for fault location of communication link in process layer of intelligent substation

Abstract

The invention provides a method of fault location for a communication link in an intelligent substation process layer. The method comprises the following steps of analyzing an SCD file, obtaining a GOOSE / SV virtual loop information, and acquiring information of a sending terminal device, a receiving terminal board and ports; analyzing an SPCD file, obtaining process layer network information, and forming a set of each path Path; analyzing reported broken chain alarm information, receiving a sending terminal board card and ports of a virtual loop, ports between a sending terminal and a receiving end and a path set through the information of the sending terminal device, the receiving terminal board, the ports and the Path set in the network topological structure; calculating port fault probabilities with the combination of the device current communication state; and checking corresponding devices according to the fault probabilities from high to low. The method can rapidly position the communication fault point in a simple, reliable and effective manner, and ensure the reliable operation of the secondary circuit.

Description

technical field [0001] The invention relates to the field of intelligent substations, in particular to a method for fault location of a secondary circuit communication link. Background technique [0002] The substation is an important part of the power system. The safe operation of the substation is of great significance to maintain the stability of the power system and ensure the reliable power supply of the power grid. In the smart substation, the communication network replaces the traditional secondary circuit, and the digital signal replaces the traditional physical electrical signal, realizing the networking of the secondary equipment. As an important device for monitoring the network communication status of intelligent stations, the network message recording and analyzing device realizes the functions of message storage and analysis, real-time monitoring of network traffic, and alarming. However, at present, the status monitoring of the secondary circuit mainly relies...

AI Technical Summary

Problems solved by technology

However, at present, the status monitoring of the secondary circuit mainly relies on professional technicians to assist in the analysis of abnormal causes based on the communication messages in the network message recording and analysis device. Quantitative and qualitative analysis of the fault characteristics of the fault caused some important information to be submerged, and it was impossible to form a complete secondary circuit early warning and analysis strategy, which made it difficult for the operation and maintenance personnel to monitor and analyze the secondary circuit status of the whole station in real time

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