Pilot protection based on boundary characteristics of CLC tuned half-wavelength transmission line

被引：0
|
作者：
Shu H. [1 ]
Tang Y. [1 ,2 ]
Zhang Y. [1 ]
Han Y. [1 ]
Dai Y. [1 ]
Bo Z. [1 ]
机构：
[1] State Key Laboratory of Collaborative Innovation Center for Smart Grid Fault Detection, Protection and Control Jointly, Kunming University of Science and Technology, Kunming
[2] Faculty of Resources Engineering, Kunming University of Science and Technology, Kunming
来源：
Dianli Zidonghua Shebei/Electric Power Automation Equipment | 2023年 / 43卷 / 04期
基金：
中国国家自然科学基金;
关键词：
boundary characteristics; directional elements; half-wavelength transmission; pilot protection; tuned circuit;
D O I：
10.16081/j.epae.202210004
中图分类号：
学科分类号：
摘要：
When the fault occurs inside the line，the fault current collected at the line-side measuring point at the connection between the tuned circuit and the transmission line is rich in high-frequency components. When the external fault occurs，the high-frequency components collected from the line-side is in scarcity，this boundary characteristic is used to construct a directional element for half-wavelength transmission line. For the tuned circuit，the simulated current waveform is matched with the measured waveform using its faultless model，and if the match is successful，there is no fault inside the tuned circuit，otherwise，there is a fault inside the tuned circuit. The combination of the directional element and the tuned circuit protection constitutes its pilot protection scheme without the need of double-end data synchronization. A large number of RTDS real-time digital-analog hybrid tests show that the pilot protection scheme is effective over the full line length range and is not affected by current transformer saturation，and has good robustness. © 2023 Electric Power Automation Equipment Press. All rights reserved.
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页码：1 / 9
页数：8
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