Partial discharge detector performance evaluation method

Abstract

The invention provides a partial discharge detector performance evaluation method, which comprises a partial discharge map database, a partial discharge pulse sequence generator and a trigger circuit, wherein the partial discharge map database serves as a reference source of the partial discharge pulse sequence generator for simulation output of discharge maps; the partial discharge pulse sequence generator outputs the discharge maps in a partial discharge pulse sequence mode according to maps in the partial discharge map database; and the trigger circuit is used for generating synchronization signals, and the synchronization signals are used for triggering the output of the discharge maps in each period. The partial discharge detector performance evaluation method can generate different types of partial discharge pulse sequences, including basic programmable calibration pulse sequences to simulation of partial discharge maps of different insulation defect models, so as to satisfy requirements for different nominal performance evaluation of different digital type partial discharge measuring instruments; and the partial discharge detector performance evaluation method can be used for verifying functions of the partial discharge measuring instruments and improving performances thereof at the design stage, so as to reduce required experiments and tests.

Description

technical field [0001] The invention relates to performance evaluation of a partial discharge detector, in particular to a method for evaluating the performance of 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 hi...

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

Images