Partial discharge detector performance evaluation system

Abstract

The invention provides a performance evaluation system for a partial discharge detector, comprising: a partial discharge map database, which is used as a reference source for the partial discharge pulse sequence generator to simulate and output a discharge map; a partial discharge pulse sequence generator is used for The map in the partial discharge map database outputs the discharge map in the form of a partial discharge pulse sequence; the trigger circuit is used to generate an output synchronization signal, wherein the synchronization signal is a trigger for the output of the discharge map per cycle. The present invention can generate different types of partial discharge pulse sequences, including the basic programmable calibration pulse sequence to the simulation of partial discharge maps of different insulation defect models, so as to meet the requirements of different nominal performance evaluations of different digital partial discharge measuring instruments; Can be used for functional verification of partial discharge meters, as well as to improve their performance during the design phase to reduce the number of pilot tests required.

Description

technical field [0001] The invention relates to performance evaluation of a partial discharge detector, in particular to a performance evaluation system for a partial discharge detector. Background technique [0002] Partial discharge measurement is an effective non-destructive method for detecting insulation defects in high-voltage electrical equipment. The existence of an insulation defect will enhance the electric field in the local area around it, resulting in a local insulation breakdown, and a rapid charge transfer occurs in this small area. Partial discharge detection is usually based on the evaluation of electrical quantities or non-electrical signals during the discharge. It is well known that the occurrence of partial discharges can lead to a gradual deterioration of insulation and eventually lead to insulation failure. Therefore, the detection, location and diagnosis of partial discharge are essential work for the evaluation of the insulation status of high-volt...

AI Technical Summary

Problems solved by technology

Most traditional partial discharge calibrators can only output charge pulses with a known discharge amount at a fixed repetition rate, which can be used to verify the linearity and polarity of the partial discharge meter. Programmable partial discharge calibrators can Perform additional tests such as pulse train response and pulse resolution to standard defined performance, while all the above procedures are only for calibration and evaluation of the measured apparent charge

Currently, there are few standards or established procedures for evaluating performance-advanced instruments

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