期刊
IEEE TRANSACTIONS ON POWER DELIVERY
卷 31, 期 5, 页码 2159-2168出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TPWRD.2016.2571438
关键词
Faulty line selection; high resistance fault; line main protection; time domain; traveling wave; UHVDC system
资金
- National Natural Science Foundation Committee of China [51277143]
The UHVDC transmission system has been increasingly used because of the advantages in long distance and large capacity transmission. However, the existing traveling-wave-based protection for UHVDC transmission lines is not sensitive enough to properly detect the internal fault with high fault resistance. A novel traveling-wave-based protection scheme for bipolar UHVDC lines is proposed in this paper. The discriminative characteristic between the internal and external fault, embodied in the backward traveling wave, is extracted to formulate the main protection criterion. The faulty line is identified by the polarity of the voltage fault component. In addition, only the single-pole voltage and current of rectifier side are required for the proposed protection scheme. The simulation and field data tests show that the proposed protection scheme can make a correct identification of the fault section and selection of the faulty line in the +/- 800 kV UHVDC system and +/- 500 kV HVDCsystem. Besides, the proposed protection can correctly detect the grounding fault with fault resistance up to 500 Omega.
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