Discharge generator for simulating turn-to-turn insulation breakdown of transformer winding

Abstract

The invention discloses a discharge generator for simulating turn-to-turn insulation breakdown of a transformer winding. The discharge generator that can take electricity from a low-voltage winding comprises a support column, an electricity taking device, a conductive device and a conductive magnetism generating device. Compared with an existing discharge generator for simulation, the disclosed discharge generator has the following advantages: a plurality of short-circuit leads do not need to be led out, the insulation performance of a transformer winding cannot be damaged after a long-time test, and after the electricity taking device obtains voltage, the conductive device uninterruptedly conducts the on-off process under the action of the conductive magnetism generating device, so that electric sparks are generated, and the stable discharge effect is achieved.

Description

technical field [0001] The invention relates to the technical field of discharge simulation tests, in particular to a discharge generator for simulating inter-turn insulation breakdown of transformer windings. Background technique [0002] Turn-to-turn insulation breakdown of transformer windings will increase the current in the windings, increase the temperature, aggravate the damage to the winding insulation, affect the normal operation of the transformer, and adversely affect the safe, reliable and stable operation of the power system. Therefore, it is of great significance to study the inter-turn insulation breakdown inside the transformer. [0003] For the research on the discharge caused by the inter-turn insulation breakdown inside the transformer, the simulation method is generally used, specifically: multiple short-circuit leads are respectively drawn from each phase winding of the three-phase transformer, and the short-circuit leads are connected to one end of the ...

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Problems solved by technology

[0005] (1) The pre-processing is cumbersome, and the insulation of the transformer may be damaged when lifting the body and leading out the short-circuit lead. After the installation, it is necessary to dehumidify the transformer oil, which will cost a lot of money

[0006] (2) Long-term short-circuit test increases the winding current and temperature, which may damage the insulation performance of the transformer winding, which is not conducive to the long-term operation of the transformer

[0007] (3) It is not possible to remove the inter-turn short circuit fault quickly and conveniently, and observe the working state of the transformer in normal operation

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