The influence of coke aging on electrical performance of double rings DC grounding electrode

2018 3rd International Conference on Insulating Materials, Material Application and Electrical Engineering

材料科学;无线电电子学;电工学

Su, Lisha^1 ; Liu, Lianguang^1 ; Liu, Hongzheng^2 ; Zhu, Wenbing^2

School of North China Electric Power University, Beijing

102206, China^1

Institute of Electricity Science, State Grid Corporation, SHANDONG

250003, China^2

关键词: DC grounding electrodes;    Electrical performance;    HVDC;    HVdc grounding electrode;    Normal operations;    Operation and maintenance;    Research results;    Stable operation;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/452/3/032072/pdf
DOI  :  10.1088/1757-899X/452/3/032072

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

The long-time work of the HVDC grounding electrode leads to the degradation of electrical performance, which not only affects the normal operation of the grounding electrode, but also may affect the safe and stable operation of the HVDC system. It is an important task to study the effect of the aging of coke bed and the corrosion of grounding electrode for the operation and maintenance of grounding electrode. Aiming at Xintian grounding electrode of Tianguang HVDC project, which has been running for 17 years, this paper analyzes the structure of double rings grounding electrode and the mechanism of aging of the coke, derived the algorithm with the consideration of coke bed to calculate the electrical performance indexes of ring grounding electrode, then use the design date of Xintian grounding electrode to verify it, finally, analyze the effect on the electrical performance of double rings grounding electrode which contributed by the aging of coke. The research results and conclusions can be used as reference for maintenance and overhaul of double rings grounding electrodes.