Transmission Attenuation of 110kv Asymmetric Transmission Lines Based on Measured Data

2019 4th Asia Conference on Power and Electrical Engineering

能源学;电工学

Pang, Songling^1 ; Tan, Fali^2 ; Zhao, Hailong^1 ; Zhang, Meng^2 ; Liao, Jian^2 ; Peng, Yang^2

Electric Power Research Institute, Hainan Power Grid Co., Ltd., Haikou

570100, China^1

Wuhan Sunshine Power Science AndTechnology Co., Ltd, Wuhan

430074, China^2

关键词: Asymmetric transmissions;    Attenuation characteristics;    Coupling component;    Location precision;    Research object;    Transmission attenuations;    Transmission distances;    Traveling wave;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/486/1/012125/pdf
DOI  :  10.1088/1757-899X/486/1/012125

来源: IOP

【 摘 要 】

The characteristic of traveling wave transmission has great influence on the location precision of the fault point. In order to accurately evaluate the transmission and attenuation characteristic of actual traveling wave on transmission lines, a typical asymmetric arrangement 110kV transmission line is selected as the research object. First, the parameters of the transmission line are calculated, and the traveling wave decoupling algorithm is derived. Then, the traveling wave current collected by the distributed traveling wave monitoring system on the line is analyzed. The results show that for a short distance asymmetric 110kV line, it can be decoupled by the conventional decoupling balance line method, and the coupling component ratio is less than 2% after decoupling. With the increase of transmission distance, the attenuation degree of traveling wave increases. When the transmission distance is 60km, the attenuation of line mode is 21.2% and the zero mode attenuation is 50.4%.