Insulation on-line monitoring device and method for impact capacitor in generator outlet circuit breaker

Abstract

The invention relates to an insulation on-line monitoring device and method for an impact capacitor in a generator outlet circuit breaker, a capacitor shell and the ground are ingeniously separated through an insulation cushion block and connected through an annealed copper wire, current passing through the capacitor is conveniently collected, a PT in a GCB is directly used, reliable reference data are provided for equipment operation, and the monitoring accuracy is improved. The risk of unplanned shutdown of equipment is reduced, and online monitoring of the inter-electrode insulation of the impact capacitor which is closed in the GCB and cannot be observed directly can be realized through capacitance testing. The method provides big data support and reference for operation, inspection and maintenance of a power plant, can quickly and accurately judge whether tripping is caused by impact on insulation of a capacitor when a power generation enterprise has unplanned shutdown, is helpful for the power generation enterprise to quickly check tripping reasons, completes unit grid-connected operation in the shortest time, and improves the power generation efficiency. And electric quantity assessment of a power grid dispatching department to power generation enterprises is reduced.

Description

technical field [0001] The invention relates to an on-line monitoring device and method for the insulation between poles of a shock capacitor, in particular to an on-line monitoring device and method for the insulation between poles of a shock capacitor in a generator outlet circuit breaker (hereinafter referred to as GCB). Background technique [0002] At present, with the national energy industry's carbon peak and carbon neutral goals, the installed capacity of traditional thermal power plants is on a downward trend, and the single-unit capacity of thermal power plants (including nuclear power plants, the same below) in service is basically above 600MW ; As a traditional clean energy industry, the stand-alone capacity of large hydropower stations is also around 700MW. The generator sets in service should be future-oriented, so that various existing power generation methods can better adapt to the future intelligent society and energy revolution and innovation. The GCB is ...

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Problems solved by technology

[0003] In view of the above situation, in order to overcome the defects of the prior art, the object of the present invention is to provide an on-line monitoring device and method for the insulation of the impulse capacitor in the generator outlet circuit breaker, which can effectively solve the problem that the insulation performance of the impulse capacitor in the GCB cannot be monitored online

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