Fault section identification method for the UHV GIL-overhead hybrid line

The Journal of Engineering

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[1] The Key Laboratory of Smart Grid of Ministry of Education, Tianjin University, Tianjin, People's Republic of China;The State Key Laboratory for Security and Energy Saving, China Electric Power Research Institute, Beijing, People's Republic of China;

关键词: hybrid power systems;    power transmission faults;    gas insulated transmission lines;    power overhead lines;    UHV GIL-overhead hybrid transmission line;    fault section identification function method;    UHV waters;    China;    protection selective tripping;    electrical parameters;   

DOI  :  10.1049/joe.2018.8693

来源: publisher

【 摘 要 】

GIL-overhead hybrid transmission line is an essential way for UHV waters crossing power transmission over long distance in china. The fault section identification of the UHV GIL-overhead hybrid line is a previous work for the protection selective tripping and quick repair after fault. The characteristics of the electrical parameters in different sections of the UHV GIL-overhead hybrid line are analysed first. Regarding the joint of the UHV GIL-overhead hybrid line as the reference point, a fault section identification function is established. According to the characteristics of the complex plane derived from the function, a fault section identification method is proposed for the UHV GIL-overhead hybrid line. The accuracy of the fault section identification method is tested by simulation and the factors affecting the accuracy of the algorithm are analysed.

【 授权许可】

CC BY