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Method for determining diffusion characteristics of SO2 in GIS equipment based on CFD technology

A technology of diffusion characteristics and determination methods, which is applied in the field of SO2 diffusion characteristics determination in GIS equipment, and can solve problems such as failure to provide reference for equipment failures

Active Publication Date: 2021-06-08
GUIZHOU POWER GRID CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention: provide a kind of SO in the GIS equipment based on CFD technology 2 Diffusion characteristics determination method to solve the characteristic decomposition product SO that no one has studied in the prior art 2 Diffusion characteristics in GIS equipment cannot provide reference for further judgment of equipment failure and other technical issues

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  • Method for determining diffusion characteristics of SO2 in GIS equipment based on CFD technology
  • Method for determining diffusion characteristics of SO2 in GIS equipment based on CFD technology
  • Method for determining diffusion characteristics of SO2 in GIS equipment based on CFD technology

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Embodiment Construction

[0047] SO in a GIS equipment based on CFD technology 2 A method for determining diffusion characteristics, which includes:

[0048] Step 1. Establish model and initial conditions

[0049] SF 6 Electrical equipment model ] Isometric modeling, the model is divided into two parts, the lower large cylinder is the equipment body, the upper small cylinder is the air intake, and the entire geometric model is in a closed structure. Considering the actual situation, SF 6 The high-voltage electrical equipment is in a high-pressure environment, so during the entire simulation process, the absolute pressure inside the model is selected as 0.4Mpa and 0.6Mpa, and the temperature is 300K. The simulation calculation is based on the ANSYS FLUENT software platform, and the grid is divided by the Ansys Fluent Meshing tool. The number of grids is 12843, and the grid quality is above 0.8, which meets the requirements.

[0050] Step 2. Determine the initial concentration vs. SO 2 Diffusion ef...

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Abstract

The invention discloses a method for determining diffusion characteristics of SO2 in GIS equipment based on a CFD technology. The method comprises the following steps of: performing equal-proportion modeling on an SF6 electrical equipment model; determining the influence of the initial concentration on SO2 diffusion; determining the influence of absolute pressure on SO2 diffusion; determining the SO2 concentration change condition of each monitoring point of the model; under the condition of the same pressure and different initial concentrations, the larger the initial concentration being, the longer the time for uniform diffusion being; the larger the absolute pressure is, the larger the diffusion rate of SO2 being, and the shorter the time required for uniform diffusion of SO2 being. The technical problems that in the prior art, the diffusion characteristic of the characteristic decomposition product SO2 in GIS equipment is not researched by people, and reference cannot be provided for further judging equipment faults are solved.

Description

technical field [0001] The invention belongs to the technical field of gas diffusion characteristics research, and in particular relates to SO in a GIS equipment based on CFD technology. 2 Diffusion properties determination method. Background technique [0002] Sulfur hexafluoride (SF 6 ) gas is widely used in electrical equipment such as gas-insulated switches (GIS) and high-voltage circuit breakers with voltage levels of 35kv and above because of its extremely stable chemical properties, excellent insulation properties, and arc-extinguishing properties. At normal temperature and pressure, pure SF 6 The gas has good stability. When internal failures such as discharge occur, the SF 6 The gas will decompose under the high temperature generated by the fault, and SF 6 A small amount of oxygen, moisture and solid insulating medium mixed in electrical equipment further react to generate SO 2 and H 2 Stable and iconic decomposition products such as S. Among them, SO 2 as S...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N13/00
CPCG01N13/00G01N2013/003
Inventor 张英贺毅张靖王为王明伟余鹏程赵世钦潘云
Owner GUIZHOU POWER GRID CO LTD