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A Calculation Method of Dielectric Strength of High-Voltage Electrical Equipment Based on Gas Decomposition Products

A high-voltage electrical equipment and gas decomposition technology, applied in the high-voltage electrical field, can solve the problems of not considering the unbalanced effect, the evaluation of the insulation operation status of high-voltage electrical equipment, and inaccurate online monitoring, and achieve the effect of saving test costs and universal applicability

Active Publication Date: 2022-04-22
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 the insulation characteristics of high-voltage electrical equipment in the prior art, and the electron collision cross-section data is ignored. Intact particles lead to inaccurate evaluation of insulation operation status of high-voltage electrical equipment and online monitoring

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  • A Calculation Method of Dielectric Strength of High-Voltage Electrical Equipment Based on Gas Decomposition Products
  • A Calculation Method of Dielectric Strength of High-Voltage Electrical Equipment Based on Gas Decomposition Products
  • A Calculation Method of Dielectric Strength of High-Voltage Electrical Equipment Based on Gas Decomposition Products

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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 method for calculating the insulation strength of high-voltage electrical equipment based on gas decomposition products. First, the molecular structure S of the gas filled in the high-voltage electrical equipment and its elastic collision and inelastic collision reaction system R in the process of partial discharge are calculated; and then According to the reaction system R, calculate the evolution law of the gas decomposition products under partial discharge; finally, according to the evolution law of the gas decomposition products, calculate the insulation strength of the gas (E / N) cr . The invention solves the problems in the prior art that the non-equilibrium effect is not considered in the research on the insulation characteristics of high-voltage electrical equipment, and particles with incomplete electron collision cross-section data are ignored, resulting in inaccurate evaluation and online monitoring of the insulation operation status of high-voltage electrical equipment .

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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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/12G16C10/00
CPCG01R31/1281G16C10/00
Inventor 付钰伟
Owner XIAN UNIV OF TECH
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