Switch cabinet partial discharging detection system and method

Abstract

The invention discloses a switch cabinet partial discharging detection system and method, and relates to the technical field of electrical power system detection. The switch cabinet partial discharging detection system comprises an ultrasonic sensor, a ground electric wave sensor, a plurality of ultrahigh frequency sensors, a plurality of filter and amplification units, a FPGA control high-speed A / D sampling unit, a DSP comprehensive number processing unit, a storage unit, a display unit, a keyboard input unit, a communication interface and a power frequency signal input unit. Signals of an ultrasonic frequency segment, a ground electric wave segment and an ultrahigh frequency segment are gathered through the ultrasonic sensor, the ground electric wave sensor and the ultrahigh frequency sensors, accuracy detection of partial discharging types, discharging intensity and discharging point positions of a switch cabinet are realized, the defects that detection accuracy is not high due to the fact that energy releasing types are different of different discharging types and differences of practicability and sensitivity of different detection methods are overcome, and the detection accuracy is effectively improved.

Description

technical field [0001] The invention belongs to the technical field of power system detection, and in particular relates to a partial discharge detection system and detection method of a switch cabinet. Background technique [0002] At present, the 10KV and 35KV high-voltage switchgear complete sets of equipment in the distribution network have been widely used in the power system. They are very important electrical equipment in the distribution network, and their reliable operation is directly related to the reliability of the power supply of the power system. [0003] In the switchgear insulation system, there are differences in the electric field strength of each part. Once the electric field strength in a certain area reaches its breakdown field strength, the discharge phenomenon will occur in this area, but there is no penetration between the two conductors that apply the voltage. The entire discharge process, that is, the discharge does not break down the insulation sy...

AI Technical Summary

Problems solved by technology

Partial discharge is partial insulation breakdown. If it is allowed to spread and develop continuously, it will cause insulation damage, which will lead to insulation penetration breakdown and cause short circuit accident inside the switchgear.

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