Leakage-current monitoring system in flashover process of icing insulator

Abstract

The invention discloses a leakage-current monitoring system in a flashover process of an icing insulator. The monitoring system includes a front end circuit and a data acquisition and processing device. The front end circuit includes a diverter for signal extraction. The diverter used for the signal extraction is connected with the front end circuit used for signal conditioning through a transmission cable. The front end circuit used for the signal conditioning is connected in parallel with a DC power-supply circuit; the data acquisition and processing device includes a data acquisition card, an industrial personal computer and a data storing, processing and analyzing platform, which are connected in order; and the data storing, processing and analyzing platform displays the waveform of the leakage current and stores, analyzes and prints out acquired data. The leakage-current monitoring system in the flashover process of the icing insulator is capable of monitoring the leakage current and development and changes of local electric arcs in the flashover process of the icing insulator so that measurement, storage and analysis of a current completing process are realized.

Description

technical field [0001] The invention relates to an electric test device, in particular to a leakage current monitoring system during flashover of an ice-coated insulator. Background technique [0002] Icing is a special kind of pollution, which seriously threatens the operation of the power system. my country is one of the countries with more ice flash accidents on transmission lines, and the probability of ice damage accidents on transmission lines is high. The icing accidents of transmission lines in my country have the following characteristics: (1) The icing accidents are distributed in a wide area, last for a long time, cover a large area, cause serious accident hazards, and cause large economic losses; (2) The rime formed under the wet growth environment is the most harmful; (3) Insulator ice flash is one of the most frequent accidents. [0003] The electrical strength of insulators is significantly reduced after ice coating, but there is little research on ice flashov...

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Problems solved by technology

[0003] The electrical strength of insulators is significantly reduced after ice coating, but there is little research on ice flashover of ice-coated insulators in my country, and the flashover mechanism and characteristics of ice-coated insulators have not yet been fully understood. Leakage current monitoring system to realize the measurement, storage and analysis of the complete process of this current

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