Alternating current, direct current and impulse joint superposition test method for extra-high voltage transmission level equipment used in high-altitude area

Abstract

The invention provides an alternating current, direct current and impulse joint superposition test method for extra-high voltage transmission level equipment used in a high-altitude area. In the method, an alternating current power supply device (1), a direct current power supply device (2) and an impulse power supply device (3) are jointly superposed and applied to areas with the altitude of between 1,800 and 2,200m; and under an alternating current, direct current and impulse joint superposition voltage testing work condition, the alternating current power supply device outputs a power frequency voltage of between 0 and -900kV, the direct current power supply device outputs a direct current voltage of between 0 and + / -1,200kV, and the impulse power supply device outputs the highest 3.5MV standard lightning impulse voltage or 2.5MV standard operation impulse voltage, so that the requirement for jointly superposed voltage test of super high voltage power transmission level electrical equipment can be met. The method is an effective alternating current, direct current and impulse joint superposition test method for extra-high voltage transmission level equipment used in the high-altitude area, and has the unique advantages that the power supply can output high electrical parameter level, tested equipment can be subjected to superposition tests and joint tests, equivalent external insulation in high altitude areas of the test is checked strictly and the like.

Description

technical field [0001] The invention belongs to the high-voltage technical field of power systems, and is especially suitable for the single, combined or superimposed external insulation withstand voltage test of electrical equipment of UHV transmission level and below in high-altitude areas. Background technique [0002] As the highest voltage AC 1000kV and DC ±800kV UHV power transmission system that has been put into commercial operation in the world, it has become a reality in my country. Due to the actual needs of commercial operation, the research, development, application and deeper theoretical, basic and supporting research contents and directions of related UHV power transmission equipment basically lead the trend and trend in the world. [0003] Due to my country's vast territory and uneven energy distribution, EHV and UHV transmission systems are characterized by long-distance, large-capacity, and point-to-point energy transmission. Climate, climate, temperature a...

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Problems solved by technology

[0005] In the existing joint superposition test research of AC, DC and impulse voltage, the low voltage level and low altitude area are its most important characteristics. In addition, due to the arrangement of power supply equipment and site requirements, no AC-DC combined voltage test has been seen. Based on the research method and related research content of superimposing an impulse voltage on the AC or DC voltage receiving side

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