Method for testing performance of different types of partial discharge detector mainframes based on analog voltage signal injection

Abstract

The invention discloses a method for testing performance of different types of partial discharge detector mainframes based on analog voltage signal injection. A function generator with adjustable output frequency of 0-3.5 GHz and an adjustable output amplitude of 0-10 V is adopted in the method disclosed by the invention, and equivalent analog voltage signals generated by the function generator and based on partial discharge waveforms actually tested by a pulse current partial discharge detection sensor, an ultrasonic partial discharge detection sensor and an ultrahigh frequency partial discharge detection sensor are correspondingly and directly injected into the mainframes of a pulse current partial discharge detector, an ultrasonic partial discharge detector and an ultrahigh frequency partial discharge detector or through DC blocking elements with frequency bands of 10 kHz to 10 MHz. The method disclosed by the invention has the excellent advantages that the testing method is universal and standard, the testing result is reproducible and quantifiable, the range of application of testing objects is wide, the testing contents are comprehensive, and the like.

Description

technical field [0001] The invention belongs to the technical field of partial discharge detection of electric power equipment, and is especially suitable for the performance test of the partial discharge detection system of electric power equipment itself. Background technique [0002] Due to manufacturing process deviations, electric field design deviations, improper selection, insulation material performance deviations, assembly deviations, etc., the actual operating electrical equipment is under fluctuating operating voltage, load current, and the resulting vibration, heat, etc. Under the environment, there will be parts where the electric field is distorted, which will promote the occurrence of partial discharge. [0003] Partial discharge can only be controlled but cannot be avoided. Its influence on the performance of electrical equipment varies with different parts, shapes and types. When the burr on the metal conductor is discharged for a long time, its sharp corne...

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However, it is an indisputable fact that the detection principle is the same, and there ar

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