System and method for detecting distribution network pole-mounted equipment fault discharge

Abstract

The invention belongs to the technical field of power system equipment state detection and in particular to a system and method for detecting distribution network pole-mounted equipment fault discharge. The system comprises an acquisition module used for collecting the power-frequency periodic signal, the UHF signal and the ultraviolet photon signal of the distribution network pole-mounted equipment; a multichannel AD continuous conversion module used for converting an analog signal output by the acquisition module into a digital signal; a MCU module used for obtaining the digital signal output by the multichannel AD continuous conversion module, and extracting the amplitude and the time of the UHF signal, its phase relation with the power-frequency periodic signal and the number of ultraviolet photons; and a control terminal connected with the MCU module through a communication module and used for drawing a PRPD map, displaying the number of ultraviolet photons, identifying a fault discharge type, and displaying a result. The system realizes the noncontact detection of the distribution network pole-mounted equipment by a UHF method and an ultraviolet detection method, and identifies the internal discharge and the external discharge according to the technical characteristics of the UHF method and the ultraviolet detection method.

Description

technical field [0001] The invention belongs to the technical field of power system equipment state detection, and in particular relates to a detection system and a detection method for fault discharge of equipment on a distribution network column. Background technique [0002] The power network mainly includes the main network and the distribution network. Compared with the main network, the structure of the distribution network is more complicated, and the number of equipment is larger. At present, there are many methods for fault discharge detection of main network equipment, mainly including high-frequency pulse current method, ultrasonic method, ultra-high frequency method, ultraviolet detection method and chemical analysis method. Each method has its own advantages and corresponding application scenarios, and relevant detection guidelines or standards have been formed in the fault discharge detection of main network equipment. There is a lack of corresponding methods ...

AI Technical Summary

Problems solved by technology

The current method is to use the live detection equipment in the substation of the main network to detect the fault discharge of the equipment on the distribution network column. The workload is huge, the detection efficiency is low, and the data fusion process of multiple detection methods is complicated, and the discharge type identification is difficult.

Therefore, although the live detection work of distribution network equipment has been carried out at present, due to the existence of the above problems, the efficiency of equipment status detection on the distribution network column and the accuracy of fault identification are seriously restricted.

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