Electric generator outlet dry-type voltage transformer test model and manufacturing method thereof

Abstract

The invention discloses an electric generator outlet dry-type voltage transformer test model and a manufacturing method thereof. The test model comprises an iron core, a secondary coil insulation framework, a secondary coil, a secondary coil shielding layer, a primary coil insulation framework, a primary coil and an outer insulation layer; the secondary coil insulating framework, the secondary coil, the secondary coil shielding layer, the primary coil insulating framework, the primary coil and the outer insulating layer are sequentially wrapped layer by layer from inside to outside by taking an iron core as a central axis; the primary coil comprises a plurality of layers of coils and further comprises a high-voltage tail end interlayer tap, a high-voltage tail end turn-to-turn tap, a high-voltage middle interlayer tap, a high-voltage middle turn-to-turn tap, a high-voltage head end interlayer tap and a high-voltage head end turn-to-turn tap. The test model has the advantages that the test model is used for measuring the overall parameter change rule of a dry-type voltage transformer, and theoretical support is provided for research of fault diagnosis and insulation detection methods.

Description

technical field [0001] The invention relates to the field of PT longitudinal insulation fault diagnosis at a generator outlet, and more particularly relates to a generator outlet dry-type voltage transformer test model and a manufacturing method thereof. Background technique [0002] Dry-type voltage transformer (hereinafter referred to as "PT") is widely used in various power generation enterprises and power systems due to its simple structure, easy maintenance, and reasonable price. Provide generator voltage signals to dual configuration generator transformer protection, excitation regulator, remote control and metering devices respectively. Affected by factors such as design level, pouring process, wire quality and operating environment, in recent years, there have been many incidents of abnormal shutdown of generator units due to internal insulation failure of generator outlet PT in China. According to incomplete statistics, from 2010 to 2018, more than 30 PT primary wi...

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Problems solved by technology

It is not possible to copy the relevant regulations of the dry-type air-core reactor turn-to-turn insulation exponential decay oscillation test, and it is necessary to conduct research on the structure and parameter characteristics of the generator outlet PT

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