Influence of the Test Current on Dynamic Resistance Measurements of SF6 Circuit Breakers

2019 2nd International Conference of Green Buildings and Environmental Management

生态环境科学

Lu, Yufeng^1 ; Su, Yi^1 ; Liang, Zhaoting^2 ; Y., Lu

Electric Power Research Institute of Guangxi Power Grid, Nanning, China^1

Hezhou Power Supply Bureau, Guangxi Power Grid Co. Ltd., Hezhou, China^2

关键词: Arcing contact;    Contact erosion;    Degree of erosion;    Dynamic resistance;    ON dynamics;    SF6 circuit breakers;    Simulated erosions;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/310/4/042006/pdf
DOI  :  10.1088/1755-1315/310/4/042006

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

In order to study the influence of the test current on the dynamic resistance measurement of the SF6 circuit breaker with different erosion degrees, simulated erosion experiment was carried on 126 kV SF6 circuit breaker. The result shows, that the higher the test current is, the smaller the resistance of arcing contact when the circuit breaker is of any degree of erosion, but there is always no obvious link between the arcing contact travel and the test current. In addition, the dispersion of the test results decreases with the increase of the test current. However, when the erosion of the circuit breaker is very serious, the dispersion of results will be great regardless of the value of the test current. Therefore, considering the influence of test current on contact resistance, in order to obtain actualarcing contact resistance and to reduce the dispersion of test results considering the influence of test current on contact resistance, the larger dynamic resistance test current should be chosen as much as possible, and the dynamic resistance test must be carried on many times when contact erosion is extremely serious, so that the state of arcing contact can be obtained according to the distribution of test results.