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

A technology of superimposed voltage and impulse voltage, which is applied in the direction of testing dielectric strength, etc., can solve the problem of superimposed impulse voltage that has never been seen, and achieve the effect of strict evaluation of equivalent external insulation and high level of electrical parameters

Active Publication Date: 2011-11-23
ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD +1
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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 s

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

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Embodiment Construction

[0021] High-altitude transmission level AC, DC, and impulse combined superimposed voltage test method. This method uses AC power supply unit 1, DC power supply unit 2, and impulse power supply unit 3. Under combined superimposed voltage test conditions, AC power supply unit 1 outputs 0-900kV power frequency voltage, DC power supply unit 2 outputs 0-±1200kV DC voltage, and impulse power supply unit 3 outputs the highest 3.5MV standard lightning impulse voltage or 2.5MV standard operating impulse Voltage, to meet the joint superposition voltage test requirements of UHV transmission level electrical equipment; the voltage test method for joint superposition of AC power supply unit 1, DC power supply unit 2), and impulse power supply unit 3 is as follows:

[0022] a. The AC voltage and the DC voltage respectively act on the first terminal 7 and the second terminal of the device under test 6 insulated from the ground through the first protection resistor 4 at the outlet of the AC po...

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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...

Claims

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Application Information

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IPC IPC(8): G01R31/12
Inventor 李锐海王科马仪高超廖永利
Owner ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD
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