Cable oscillatory wave partial discharge measurement system

Abstract

The invention discloses a cable oscillatory wave partial discharge measurement system, which comprises an oscillatory wave test module, a communication module, a test result analysis module and a testresult output module, wherein the oscillatory wave test module is in communication connection with the communication module to realize information interaction; the communication module is in communication connection with the test result analysis module to realize information interaction; and the test result analysis module is in communication connection with the test result output module to realize information interaction. According to the invention, the oscillatory wave test module is used for testing the partial discharge of the cable oscillatory wave, fault positioning is realized, and theaging condition of the cable can be judged according to the obtained testing result.

Description

technical field [0001] The invention relates to the technical field of cable detection, in particular to a cable oscillatory wave partial discharge measurement system. Background technique [0002] In the past ten years, cross-linked polyethylene (XLPE) power cables have been widely used in urban power grids due to their good insulation performance, easy manufacturing, convenient installation, safe and reliable power supply, and favorable layout of cities and factories and mines. However, in the manufacturing process of power cables, there are often problems with raw materials or manufacturing processes, resulting in air gaps between the conductor and the insulating layer, impurities or semiconductors protruding toward the insulating layer, and partial discharges are easily generated in these air gaps and at the tips of impurities . In addition, various defects may also exist during the installation and operation of power cables to generate partial discharges. At the same ...

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Problems solved by technology

Although this method improves the measurement accuracy by adding compensation capacitors with adjustable capacitance values ​​and installing partial discharge pulse detectors at the two ports of the cable, it does not solve the problem of difficult completion of cable partial discharge testing and fault location, making it impossible to judge The problem of cable aging, therefore, is in urgent need of a cable oscillatory wave partial discharge measurement system

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