Detection method of partial discharge of electrical equipment and device thereof

Abstract

The invention relates to a detection method partial discharge of electrical equipment and a device thereof. The detection method comprises the following steps of: erecting a measuring antenna in the position which is 20-30m away from the equipment to be detected, measuring an electromagnetic wave electric field component radiated from the electrical equipment, transmitting the measured signal waveform of the electromagnetic wave electric field component into a digital storage oscilloscope for storage, transmitting the signal waveform from the digital storage oscilloscope to a computer via a communication cable, performing Fourier decomposition on the signal waveform by application software of the computer to get a frequency spectrum characteristic curve of radiated electromagnetic waves, and performing contrastive analysis on the frequency spectrum characteristic curve according to the corresponding relation between a 1GHz-3GHz ultra-high frequency component and the partial discharge characteristic of the electrical equipment so as to identify and evaluate the partial discharge characteristic of the detected electrical equipment. The detection method has the following advantages: 1-3GHz ultra-high frequency signals of the radiated electromagnetic waves generated by the partial discharge are measured through an ultra-high frequency detection method, so that the detection is less affected by external interference signals, and reliability and sensitivity in detection of the partial discharge can be greatly improved.

Description

technical field [0001] The invention relates to a partial discharge detection method and a device thereof, in particular to a partial discharge detection method and a device of electrical equipment. Background technique [0002] At present, the detection and evaluation of partial discharge characteristics of electrical equipment can be divided into two categories: non-electrical measurement method and electrical measurement method according to the nature of the detected physical quantity. [0003] The non-electrical method detects non-electrical phenomena such as ultrasonic waves, emitted light, heat, and new products that are generated during the partial discharge process to identify partial discharges of electrical equipment; the electrical measurement method detects electrical pulses and electromagnetic radiation generated during the partial discharge process. , Charge transfer and electrical energy loss and other electrical phenomena to identify partial discharge of elec...

AI Technical Summary

Problems solved by technology

[0005] Another purpose of the present invention is to solve the technical problems existing in the prior art; to provide a non-contact ultra-high frequency detection method using an external antenna, which can overcome the shortcomings of the contact measurement method such as difficulty in installation and maintenance, and can be widely used in various A method and device for detecting partial discharge of electrical equipment for on-line monitoring or off-line rapid inspection of electrical equipment

Images