Transmission characteristic simulation method and system for partial discharge ultrahigh-frequency electromagnetic wave signal of transformer

Abstract

The invention relates to a transmission characteristic simulation method and system for partial discharge ultrahigh-frequency electromagnetic wave signals of a transformer. The method is characterized by comprising the following steps: (1) conducting self-adaptive grid dividing on a transformer model constructed in advance; (2) setting a stimulated partial discharge signal source; (3) setting more than one data collection point in different positions of a transformer; and (4) obtaining respective collection results of all data collection points after a preset period of time for stimulation, and obtaining the ultrahigh-frequency transmission characteristics of local discharge signals in the transformer according to analysis of collection results of the data collection points. The application proves that the research on the transmission characteristics of partial discharge ultrahigh frequency electromagnetic wave signals is effectively and accurately achieved through a simulation mode. The transmission characteristic simulation method and system can be used for researching the transmission characteristics, such as attenuation rules and frequency spectrum distribution rules, of partial discharge ultrahigh frequency electromagnetic wave signals in a transformer.

Description

technical field [0001] The invention relates to a method and system for simulating propagation characteristics of ultra-high frequency electromagnetic wave signal of transformer partial discharge. Background technique [0002] Transformer is a key equipment in the power grid, and its safe operation is related to the safe operation of the entire power grid. During the manufacturing process, small air gap defects will appear inside the transformer due to poor insulation impregnation; moisture, impurities, etc. will also intrude into the insulation during operation, which will cause partial discharge signals in the transformer insulation, and long-term Partial discharges can cause insulation breakdown, thereby affecting the operation of the grid. Therefore, it is necessary to study the propagation characteristics of the electromagnetic wave signal generated by partial discharge in the transformer, and combine the research results with engineering practice to realize engineerin...

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Problems solved by technology

Since the transformer has iron core, winding, main insulation and other components, the structure is complex, which will cause the refraction and reflection of the electromagnetic wave signal, resulting in complex propagation characteristics of the electromagnetic wave signal in it. Therefore, it is necessary to study the partial discharge UHF electromagnetic wave signal in the transformer. Propagation characteristics in the field, such as attenuation law, spectrum distribution law, etc., and combine the research results with engineering practice to realize engineering results, such as providing guidance for the reasonable selection of detection positions in on-site detection

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