Fault location of cable hybrid transmission lines based on energy attenuation characteristics of traveling waves

被引：0
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作者：
Wen Huo
Zhenbing Qu
Zirong Ao
Yongjun Zhang
Erleng Zhao
Chen Zhang
Hao Jiang
机构：
[1] Zhunneng Power Supply Company,School of Computer Science and Technology
[2] Shenhua Group Zhungeer Energy Co. Ltd,School of Electrical Engineering
[3] China University of Mining and Technology,undefined
[4] China University of Mining and Technology,undefined
来源：
Scientific Reports | / 12卷
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摘要：
The overhead-cable hybrid transmission lines are alternately connected by two types of lines, with a more complex structure and higher difficulty in fault location. This paper presents an ac-curate fault location method for overhead-cable hybrid lines based on traveling wave energy. Firstly, the basic concept of traveling wave energy is defined. Based on the attenuation charac-teristics of the traveling wave, the mapping relationship between traveling wave energy and fault location is analyzed. Secondly, considering the influence of S-transform error on the traveling wave energy propagation law, the traveling wave energy attenuation characteristics of common A-type and B-type hybrid lines are analyzed. Then, for the overhead-cable hybrid lines with different structures, the mapping relationship between the traveling wave energy at both ends of the line and the fault distance is quantitatively derived, and an accurate fault location method based on the initial traveling wave energy ratio at the same frequency at both ends of the line is proposed. Finally, a 110 kV hybrid transmission line fault simulation model is built in PSCAD/EMTDC, and the faults under different conditions are simulated in different line sections. The effectiveness and robustness of the proposed method are verified through the simulation.
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