Stress ball discharge voltage acquiring method and system

A technology of discharge voltage and acquisition method, applied in the direction of testing dielectric strength, etc., can solve problems such as low reliability

Active Publication Date: 2018-04-03
ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD +1
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Problems solved by technology

[0004] Based on this, it is necessary to provide a method and system for obtaining the discharge voltage of pressure equalizing balls in order to solve the problem of low reliability of the selection basis for the air gap and size between equalizing balls obtained based on empirical formulas

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  • Stress ball discharge voltage acquiring method and system
  • Stress ball discharge voltage acquiring method and system
  • Stress ball discharge voltage acquiring method and system

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Embodiment Construction

[0036] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0037] The method for obtaining the discharge voltage of the equalizing ball provided by the embodiment of the present invention can be applied to determine the air gap of the equalizing ball in the valve hall of the converter station in the high altitude area. Wherein, the air gap of the pressure equalizing ball in the valve hall includes the air gap between the pressure equalizing balls, the air gap between the pressure equalizing ball and the ground, and the air gap between the pressure equalizing ball and the wall. The empirical formula for the 50% discharge voltage corresponding to the air gap...

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Abstract

The invention relates to a stress ball discharge voltage acquiring method and system. By the stress ball discharge voltage acquiring method, discharge voltage of an air gap of a stress ball is acquired by establishing mathematical models of discharge voltage, altitude, stress ball diameter and stress ball height, selection basis for air gaps among stress balls and sizes is acquired further, the relation between stress ball air gap discharge voltage and the sizes of stress balls in a valve hall is established direction, compared with a traditional air gap empirical equation, the stress ball discharge voltage acquiring method is direct, considered working conditions are specific, and reliable basis for selection of air gaps among the stress balls in the valve hall in engineering constructionis provided.

Description

technical field [0001] The present invention relates to the technical field of direct current transmission, in particular to a method and system for obtaining voltage of equalizing ball discharge. Background technique [0002] In the process of high-voltage direct current transmission, the fittings of the valve hall of the converter station are responsible for the electrical connection, mechanical fixing and voltage equalization shielding of the power equipment. The equalizing ball is one of the main fittings used in the converter station. The selection of the air gap between the equalizing balls in the valve hall of the converter station is directly related to the safe and stable operation of the DC project and the project investment. [0003] At present, in the valve hall of a high-altitude converter station, the basis for the selection of the air gap between the pressure equalizing balls and the size design of the pressure equalizing balls is mainly based on the theoretic...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/12
CPCG01R31/12
Inventor 唐力刘磊李斌李敏厉天威项阳黄开天胡蓉孙帮新
Owner ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD
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