Maintenance-free self-diagnosis method of relay protection device of intelligent transformer substation

Abstract

The invention discloses a maintenance-free self-diagnosis method of a relay protection device of an intelligent transformer substation. The method comprises the following steps: (1), configuring one group of analog quantity diagnosis channels for self diagnoses in combination units and carrying out data communication with relay protection devices by the analog quantity diagnosis channels; (2), issuing preset analog quantity waveforms in the combination units to the relay protection devices through the analog quantity diagnosis channels by means of hand-operated triggering or timing triggering; (3), subscribing the analog quantity waveforms by the relay protection devices to enter self-detection states, carrying out protection logic determination by using the channels, generating motion messages and tripping GOOSE message after determination, sending the messages to a monitoring background, and carrying out logic starting determination by normal analog quantity channels; and (4), determining states of the relay protection devices by the monitoring background based on self-detection marks. According to the invention, maintenance-free and self-diagnosis objectives of the relay protection devices can be achieved; and the method has the good application prospects.

Description

technical field [0001] The invention relates to the technical field of electric power system relay protection, in particular to a maintenance-free self-diagnosis method for a relay protection device of an intelligent substation. Background technique [0002] With the vigorous development of the new generation of smart substation construction, the secondary equipment (relay protection device) of the power system is developing towards network and intelligence. Analog information and control information are obtained through the network. The power outage inspection and maintenance of the protective device has brought great difficulties. At present, the condition-based maintenance of intelligent primary equipment in power systems has been rapidly developed, but because the entire secondary circuit cannot be tested, the condition-based maintenance of relay protection devices cannot be realized, and the current relay protection devices cannot realize automatic Diagnosis and mainte...

AI Technical Summary

Problems solved by technology

[0003] The technical problem solved by the present invention is that the existing technology cannot detect the entire secondary circuit, resulting in the problem that the state maintenance of the relay protection device cannot be realized

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