Tao Tian
ABSTRACT
In humid and dirty environment, it is easy for high voltage switchgear to trigger insulation fault. To improve the stability of high voltage switchgear, the minimum discharge distance of high voltage switchgear under micro environment has been studied. Based on COMSOL simulation software, the Multi-physical field finite element simulation model for 40.5 kV bus chamber of high voltage switchgear is established, and the temperature and humidity distribution in the bus chamber of the switchgear are obtained. The characteristics of electric field distribution in the presence or absence of microenvironment, especially in the area of bus tip and the surface of insulating partition board, are studied by numerical analysis method. At the same time, based on the air streamer discharge initiation criterion, the minimum discharge distance in micro environment is calculated by COMSOL and MATLAB software. The results show that in the micro environment, the electric field at the bus tip decreases and the minimum discharge distance decreases, but the surface electric field increases and the flashover probability increases.
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Index Terms
- Calculation of Electric Field Distribution and Minimum Discharge Distance in Micro Environment of High Voltage Switchgear: High Voltage and Insulation Technology
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