Acquisition method for inter-phase operation shock-insulation level altitude modified value of 2-4km-altitude 500kV-substation electrical equipment

Abstract

The invention discloses an acquisition method for inter-phase operation shock-insulation level altitude modified value of 2-4km-elevation 500kV-substation electrical equipment, and relates to the field of high-altitude ultrahigh-pressure transmission and transformation projects. The technical scheme includes the steps of 1), calculating the inter-phase operation shock-insulation level altitude modified value of flexible busbars at optional areas located at the altitude ranging from 2000m to 4000m or a grading ring; 2), inquiring the inter-phase operation shock-insulation level altitude modified value of the flexible busbars and the grading ring corresponding to the altitude of 0; 3), multiplying the inter-phase operation shock-insulation level altitude modified value of the flexible busbars and the grading ring corresponding to the altitude of 0 by the correction factor Ka to acquire the inter-phase operation shock-insulation level altitude modified value of the flexible busbars when the altitude is H.

Description

technical field [0001] The invention relates to the field of high-altitude ultra-high voltage power transmission and transformation engineering. Background technique [0002] The area with an altitude above 1,000 meters in China accounts for about two-thirds of the country's land area. The average elevation of the four major plateaus is above 1,000 meters. The West-to-East power transmission substation inevitably passes through high-altitude areas. In high-altitude areas, the air is thin, the air pressure is low, and the air insulation performance is reduced. It is necessary to correct the external insulation of the equipment. [0003] At present, at an altitude below 2000m, a large number of experiments and researches have been done at home and abroad on the air gap discharge characteristics and equipment pollution external insulation, and a relatively mature high-altitude equipment external insulation correction method has been obtained, and correction standards and specif...

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Problems solved by technology

[0003] At present, at an altitude below 2000m, a large number of experiments and researches have been done at home and abroad on the air gap discharge characteristics and equipment pollution external insulation, and a relatively mature high-altitude equipment external insulation correction method has been obtained, and correction standards and specifications have been formed, but for 2000m and In the above areas, especially for areas with an altitude of 2000m-4000m in western my country, there is a lack of systematic research on the air gap discharge characteristics of substation electrical equipment at home and abroad, and it is not clear how to choose the appropriate external insulation level of electrical equipment

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