Simulation Analysis of Main and Arcing Contact Current Commutation Process in SF6 Circuit Breaker

2019 5th International Conference on Energy Materials and Environment Engineering

能源学;生态环境科学

Lu, Yufeng^1 ; Su, Yi^1 ; Liang, Zhaoting^2 ; Lu, Yifan^2 ; Huang, Jinjian^1

Electric Power Research Institute of Guangxi Power Grid, Minzhu road 6-2, Nanning, China^1

Hezhou Power Supply Bureau of Guangxi Power Grid Company, Hezhou, China^2

关键词: Calculation parameters;    Commutation process;    High voltage circuit breaker;    Resistance variations;    SF6 circuit breakers;    Simulation analysis;    Theoretical modeling;    Variation characteristics;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/295/4/042002/pdf
DOI  :  10.1088/1755-1315/295/4/042002

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

In order to study the current variation characteristic and its influencing factors of the main and arcing contact during switching and opening process of high voltage circuit breaker, it is necessary to calculate the current commutation process. Firstly, the current formula in the commutation process was obtained based on the circuit model of current commutation. Secondly,based on the theoretical model of switching arc, the MODELS module and language were used to simulate the resistance variation characteristics of piecewise time-varying arc model. Finally, a simplified model of the SF6 circuit breaker arc quenching chamber was established in ATP-EMTP, and each calculation parameter was selected. The current commutation process was calculated by comparing the effect of main contact resistance and arcing contact resistance on current commutation time. It was found that the effect of the contact resistance on the current commutation time was consistent with the contact variation trend. But the effect of main contact resistance on current commutation time was small, while that of arcing contact was large.