YANG Mingjie,TONG Xiaoyang,ZHANG Guangxiao.Adaptive Single-end Protection for HVDC Transmission Line Based on Time Difference of Pole Wave Mode Components[J].Automation of Electric Power Systems,2020,44(23):117-124.
YANG Mingjie,TONG Xiaoyang,ZHANG Guangxiao.Adaptive Single-end Protection for HVDC Transmission Line Based on Time Difference of Pole Wave Mode Components[J].Automation of Electric Power Systems,2020,44(23):117-124. DOI: 10.7500/AEPS20200117004.
Adaptive Single-end Protection for HVDC Transmission Line Based on Time Difference of Pole Wave Mode Components
Aiming at the problem that the sensitivity of the single-end protection of high-voltage direct current (HVDC) transmission lines decreases when the far-end high-resistance grounding fault occurs
which may cause protection failure
an adaptive single-end protection scheme based on the time difference of pole wave mode components is proposed. By analyzing the boundary effect of the HVDC system and the propagation characteristics of the coupled line mode and ground mode in the pole wave
the different pole wave waveform characteristics in the case of internal faults and external faults are obtained. The reason for the decrease in sensitivity of traditional single-end protection in the case of far-end high-resistance grounding fault is analyzed
and an adaptive segmented protection criterion is constructed using the pole wave waveform slope and amplitude variation within the time difference of line mode and ground mode of the fault pole wave. The simulation results based on PSCAD/EMTDC software show that the proposed protection scheme can effectively detect internal and external faults and still maintain sufficient sensitivity
especially in the case of far-end high-resistance grounding faults.
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