High-voltage power cable nondestructive detection device

Abstract

A high-voltage power cable nondestructive detection device is used for detecting defects of power cables and comprises an alternating current withstand voltage testing system and a partial discharge testing system. The alternating current withstand voltage testing system comprises a power supply, a high voltage reactor and a voltage divider which are serially connected to form a loop. During testing, the end or a middle joint of a cable to be tested is connected into a high frequency wave trapper, a capacitive voltage divider, a high frequency current transformer and a partial discharge tester, and long-distance and large-capacity cable testing requirements can be met by arranging the high voltage reactor; and the high frequency wave trapper can restrain high frequency interference of the power supply side, the high frequency current transformer can sense pulses and form partial discharge signals on the partial discharge tester, and whether the cable has hidden defects can be judged by comparing the obtained partial discharge signals and standard partial discharge signals.

Description

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AI Technical Summary

Benefits of technology

This patented technology helps identify any faulty electrical conductors inside an insulated power transmission line by measuring their impedances or changes caused during operation. It uses special equipment called a probe (highly sensitive instrument) to measure these properties accurately without damaging them over time. These measurements help prevent damage from corrosion, moisture ingression, etc., reducing the risk for failure. Overall, this method provides technical benefits such as improved efficiency, reduced size, less noise, better performance, and more reliable results compared to previous methods like thermal imaging techniques.

Problems solved by technology

This technical problem addressed in this patented text relates to detecting any flaws or imperfections within high-pressure electrical power cords during their use period without causing damage from external factors such as vibrations caused by traffic jams or other sources like weather conditions. Current methods require destructively removing material around them after conductor wire insulation has been installed due to environmental concerns associated with maintaining long distance transport systems.

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