A method for evaluating the state of relay protection

Abstract

The invention relates to a relay protection equipment state evaluation method. According to the method, the relay protection equipment information is transmitted to a protection fault information main station system, relay protection normal operation data examination standard values including a measurement variable and a state variable are set in the protection fault information main station system, non-normal protection operation conditions are identified on the basis of the real-time operation information of the protection equipment, the large-volume secondary equipment redundancy measurement information collected by the protection fault information main station system is utilized to carry out same source data check on a measurement variable and a state variable of a secondary loop to discover hidden faults of the secondary loop and a corresponding secondary equipment assembly, the protection equipment self-diagnosis technology is utilized to analyze the self-check alarm information of a relay protection component collected by the protection fault information main station system to determine a specific cause of a relay protection alarm, in combination with the real-time operation information and the historical data, comprehensive and integrated evaluation on a relay protection state is realized.

Description

technical field [0001] The invention belongs to the technical field of power system dispatching automation, and relates to the direction of substation relay protection status evaluation. Background technique [0002] Relay protection equipment is the first line of defense for the safety protection of the power grid, and its safe operation is particularly important to protect the safe operation of the power grid. The traditional periodic regular inspection of relay protection is a preventive maintenance method, and the maintenance cycle of equipment is determined based on experience. Regardless of the actual operation of the equipment, some equipment with good operating conditions are periodically out of service, which increases the frequency of dispatching and adjusting the operation mode and affects the economic operation of the power grid. High labor intensity, low efficiency, long power outage time, repeated power outages, repetitive work, high maintenance cost; high main...

AI Technical Summary

Problems solved by technology

In recent years, with the wide application of substation automation technology, the self-inspection and self-diagnosis capabilities of relay protection equipment have been significantly improved. The equipment can find abnormalities in the equipment itself through self-inspection, and initially has the ability to perform condition maintenance based on equipment self-inspection alarm information. Basic, but the condition-based maintenance based on the self-inspection alarm information is a passive working mode of after-the-fact maintenance, which cannot eliminate equipment hidden dangers in time before the failure occurs, and there are system operation risks and even accidents

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