Fault on-line monitoring device of high-voltage breaker and monitoring method thereof

Abstract

The invention discloses a fault on-line monitoring device of a high-voltage breaker and a monitoring method thereof. An opening Hall current transformer, a closing Hall current transformer and the normally-opened contact of a high-voltage breaker auxiliary switch are connected with a controller via wires. The controller is connected with a display terminal. The monitoring method comprises steps of acquiring data; calculating basic data; judging direct-current grounding faults of a high-voltage breaker mechanism and turn-to-turn short circuit faults of electromagnetic coils; judging the 'opened-after-closed' fault of the circuit breaker caused by a failure to keep an opening tripper of the high-voltage breaker mechanism to be closed; judging the fault of a failure of restoration caused by deformation of a reset spring of the high-voltage breaker mechanism; judging the jam fault of the tripper of the high-voltage breaker mechanism; and judging the jam fault of an iron core of an electromagnet. The fault on-line monitoring device is simple in structure and high in measuring precision; data is precise; the calibration method is simple and easy; and technical problems in the prior art are overcome.

Description

technical field [0001] The invention belongs to the fault detection technology of a high-voltage circuit breaker, and in particular relates to an on-line monitoring device and a monitoring method for a mechanism fault of a high-voltage circuit breaker. Background technique [0002] Power system substations experience 10kV and 35kV high-voltage circuit breaker mechanism failures every year, resulting in refusal to open or close, leading to fault leapfrogging, expanding the scope of power outages, and bringing a lot of economic losses and adverse social impacts to units and society. Because the fault has the characteristics of rapid development of equipment during operation, it will generally appear in 1 to 2 years, while the circuit breaker periodic preventive test used in the prior art is generally carried out in 3 to 6 years, so it cannot Fully control the occurrence of such failures. In addition, the BLK type spring operating mechanism of the 220kV circuit breaker in each...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide an on-line monitoring device and monitoring method for high-voltage circuit breaker mechanism faults, so as to solve technical problems such as inability to effectively monitor high-voltage circuit breaker mechanism faults due to the deficiencies of the prior art

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