High-voltage cable partial discharge on-line detection system and detection positioning method

Abstract

The invention discloses a high-voltage cable partial discharge online detection system and a detection positioning method. The system comprises a plurality of signal acquisition modules which are a first signal acquisition module, a second signal acquisition module, a third signal acquisition module and a fourth signal acquisition module; the signal acquisition modules are arranged at different positions of a high-voltage cable. Output ends of the acquisition modules are connected to an input end of a partial discharge detection module. An output end of the partial discharge detection module is connected to a partial discharge analysis module; wherein each signal acquisition module comprises a signal acquisition sensor, a protection unit and a signal conditioning unit, an output end of thesignal acquisition sensor is connected to the signal conditioning unit through the protection unit, an output end of the signal conditioning unit is connected to the partial discharge detection module, and the output end of the partial discharge detection module is connected to an input end of the partial discharge analysis module. The detection efficiency is improved, the structure is simple, and the practicability is high.

Description

technical field [0001] The invention relates to the field of power fault detection, and more specifically, to an on-line detection system and a detection and positioning method for high-voltage cable partial discharge. Background technique [0002] Due to its good performance, the application proportion of XLPE cables in urban power grids has gradually increased, and has become an indispensable part of the power system. Different types of defects will inevitably occur during the production, transportation, installation and operation of cables, and various typical defects Both will produce partial discharge phenomenon. Partial discharge of high-voltage cables will cause the insulation layer of high-voltage cables to deteriorate, which will lead to sudden failure of high-voltage cables and cause immeasurable economic losses to the society. Therefore, on-line monitoring of partial discharge of high-voltage cables and accurate positioning of partial discharge points can detect ...

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the defects of low efficiency and poor detection and positioning accuracy of the high-voltage cable partial discharge detection method in the prior art, the present invention provides an online detection system and detection and positioning method for high-voltage cable partial discharge

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