Examination verification apparatus of high-frequency-current-method partial discharge detector and method thereof

Abstract

The invention discloses an examination verification apparatus of a high-frequency-current-method partial discharge detector and a method thereof. The apparatus comprises a signal excitation source, a matching resistor R0, an injection capacitor C0, a first metal test rod, a second metal test rod, an oscilloscope and a 50omega coaxial cable. A detected apparatus comprises a partial discharge detector and a high frequency sensor. The signal excitation source is a built-in signal source of the apparatus and the signal source is divided into a sine wave signal source and a pulse calibration source. The matching resistor R0 is connected in series with the sine wave signal source and the first metal test rod so as to combine and form a sine signal loop. The injection capacitor C0 is connected in series with the pulse calibration source and the second metal test rod so as to combine and form a pulse signal loop. The apparatus and the method are easy to realize, debugging is simple and rapid, and a test process is convenient and rapid. In the invention, the built-in signal source and an external signal source can be freely selected to carry out signal input. The apparatus and the method are suitable for routine maintenance, testing, verification and other occasions of the high-frequency partial discharge detector in an electric power detection industry.

Description

technical field [0001] The invention relates to the technical field of high-voltage detection, in particular to an assessment and verification device and design method for a high-frequency current method partial discharge detector. Background technique [0002] In the field of high-voltage detection technology, partial discharge occurs inside the power equipment, and the generated pulse current is led to the ground through the grounding down wire, and the current flowing through the grounding wire will drive the change of the magnetic field. By clamping the high-frequency sensor on the grounding down wire Above, the internal coil of the high-frequency sensor is converted into an electrical signal to the partial discharge detection instrument under the action of electromagnetic induction. However, due to the uneven performance of high-frequency partial discharge testers and the lack of a unified performance verification platform, the validity and reliability of the partial di...

AI Technical Summary

Problems solved by technology

However, due to the uneven performance of high-frequency partial discharge testers and the lack of a unified performance verification platform, the effectiveness and reliability of the partial discharge test results of power equipment are greatly affected, and it will bring major hidden dangers to the safe operation of power equipment. Therefore, the design of a It is of great significance to test and verify the design method of a high-frequency current method partial discharge detector

Images