Resonant experimental device of dry-type power transformer partial discharge detection

Abstract

This invention relates to harmonic vibration test facilities of partial discharge detection of dry-type transformer. This invention includes three-phase power source of 380V 50Hz, frequency conversion power source, intermedial transformer, high voltage filter, high voltage measure equipment, compensator, sampling device of partial discharge signal, measure equipment of partial discharge. Compared with existing technique, this invention has enough experiment capacity. And the invention is easy to carry.

Description

technical field [0001] The invention relates to a detection test device for electric equipment, in particular to a resonance test device for dry-type power transformer partial discharge detection. Background technique [0002] The dry-type power transformer with solid insulation has the advantages of compact structure, no oil pollution, and good fire prevention, so it has been widely used in user substations of 35kV and below. However, solid cast insulation is often more prone to hidden process local defects, such as pores and impurity particles, etc. The partial discharge of these weak links may lead to penetrating dielectric breakdown and damage equipment, resulting in fatal hazards. [0003] Partial discharge testing is an effective means of detecting local defects in insulation. Therefore, for 35KV solid insulated transformers, etc., the partial discharge test has already been used as a specified item in the field test. However, for solid insulation power transformers,...

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Problems solved by technology

[0004] The constraints on the partial discharge field test of dry-type power transformers are mainly: dry-type power transformers with large capacity need to be equipped with large-capacity test equipment and power supply, and the transformers of many user stations are arranged on floors or In the basement, the test device can only be carried by manpower

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