Comprehensive partial discharge monitoring device and method

Abstract

The invention relates to a comprehensive partial discharge monitoring device and method. The comprehensive partial discharge monitoring device comprises an internal signal detection coil (1), an external high-configuration current transformer (3) and an external signal processing unit (2), wherein the internal signal detection coil (1) is located between a rubber insulation layer (4) and cable armor (5), and the internal signal detection coil (1) and the external high-configuration current transformer (3) are connected with the external signal processing unit (2); the internal signal detection coil (1) is used for judging whether a high-voltage cable has partial discharge; the high-configuration current transformer (3) is used for detecting the discharge capacity; the external signal processing unit (2) is used for receiving a transmission signal of the internal signal detection coil (1) and a signal of the external high-configuration current transformer (3) and computing the discharge charge quantity and judging background noise, and accurate partial discharge is realized. Compared with a relatively traditional partial discharge detection technology, the comprehensive partial discharge monitoring device and method realize new technological breakthroughs, and multiple problems of difficulty in measuring the partial discharge capacity of the internal coil and multiple interference signals of the external current transformer are solved.

Description

technical field [0001] The invention relates to the technical field of high voltage electricity, in particular to a comprehensive partial discharge monitoring device and method. Background technique [0002] As the blood of the city, high-voltage cables provide the energy needed for urban life. Once the cable fails, the impact on urban life is immeasurable. The main fault of high-voltage circuit is reflected in high-voltage partial discharge. High-voltage cable partial discharge detection technology has been developed for many years, and its partial discharge detection technology has been constantly updated. [0003] For example, the Chinese utility model patent with the publication number CN203479963U discloses a cable partial discharge detection device, which includes an ultrasonic detector for obtaining ultrasonic information of ultrasonic waves and a wireless transmission unit for sending ultrasonic information, and also includes a control unit and a user. In the wire...

AI Technical Summary

Problems solved by technology

Traditional partial discharge detection methods include ultrasonic detection, ultra-high frequency current transformer detection, etc., but they all have a common problem that the environmental noise is too strong, and it is difficult to separate the partial discharge signal from the environmental signal

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