High-voltage electrical equipment insulation strength calculation method based on gas decomposition product

A high-voltage electrical equipment and gas decomposition technology, applied in the high-voltage electrical field, can solve the problems of not considering the non-equilibrium effect, inaccurate assessment of the insulation running state of high-voltage electrical equipment and inaccurate online monitoring, and achieve the effect of saving test costs and universal applicability

Active Publication Date: 2020-06-19
XIAN UNIV OF TECH
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Problems solved by technology

[0005] The purpose of the present invention is to provide a method for calculating the insulation strength of high-voltage electrical equipment based on gas decomposition products, which solves the problem that the non-equilibrium effect is not considered in the study of t...

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  • High-voltage electrical equipment insulation strength calculation method based on gas decomposition product
  • High-voltage electrical equipment insulation strength calculation method based on gas decomposition product
  • High-voltage electrical equipment insulation strength calculation method based on gas decomposition product

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Embodiment Construction

[0043] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0044] The invention relates to a method for calculating the insulation strength of high-voltage electrical equipment based on gas decomposition products. The principles involved are as follows: first, the density functional method is used to simplify the solution The equation obtains electron impact ionization, electron impact decomposition, electron attachment and recombination, positive and negative ion recombination, and the reaction between neutral particles; secondly, model and calculate the evolution law of gas decomposition products in different discharge regions of partial discharge; finally, solve the description The Boltzmann equation of the electron transport process, calculate the electric field strength (E / N) when the reduced ionization reaction coefficient and the reduced adsorption coefficient are equal cr .

[0045] The tec...

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Abstract

The invention discloses a high-voltage electrical equipment insulation strength calculation method based on a gas decomposition product. The method comprises the steps of firstly, calculating a molecular structure S of gas charged into the high-voltage electrical equipment and an elastic collision and non-elastic collision reaction system R of the gas in a partial discharge process; then, according to the reaction system R, calculating an evolution law of the gas decomposition product under partial discharge; and finally, calculating the insulation strength (E/N) cr of the gas according to theevolution law of the gas decomposition product. According to the method, the problems that in the prior art, the non-equilibrium effect is not considered in the insulation characteristic research ofthe high-voltage electrical equipment, and particles with incomplete electron collision cross section data are ignored, so that insulation operation state evaluation and online monitoring of the high-voltage electrical equipment are inaccurate are solved.

Description

technical field [0001] The invention belongs to the technical field of high-voltage electrics, and in particular relates to a method for calculating the insulation strength of high-voltage electric equipment based on gas decomposition products. Background technique [0002] As an important guarantee for the safe operation of the power system, SF 6 The number of high-voltage electrical equipment (circuit breakers, GIS, etc.) that replaces gas as an insulating and arc-extinguishing medium increases at a rapid rate with the increasing capacity of the power system, but factors such as partial discharge promote the decomposition of the gas-insulating medium, resulting in The product with low dielectric strength and active chemical properties will lead to a decrease in the dielectric strength of the equipment and seriously threaten the safe operation of the equipment. [0003] The gas insulation strength can be converted to the critical breakdown field strength (E / N) cr Indicate...

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Application Information

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IPC IPC(8): G01R31/12G16C10/00
CPCG01R31/1281G16C10/00
Inventor 付钰伟
Owner XIAN UNIV OF TECH
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