期刊
IEEE TRANSACTIONS ON POWER DELIVERY
卷 31, 期 3, 页码 973-981出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TPWRD.2014.2364547
关键词
DC line protection; di/dt limiting inductor; fault detection with ROCOV; high-voltage direct-current (HVDC) grid; hybrid dc breaker; voltage-source converter (VSC) HVDC
资金
- Electranix Corporation
Different HVDC grid types and the respective protection options are discussed. An earthed bipole HVDC grid was modeled in PSCAD, and using simulation results, the necessity of di/dt limiting inductors to contain the rise of fault currents within the capacity of current hybrid dc breakers is demonstrated. The impact of different inductor sizes on current rise was studied. A fault detection and localization scheme using the rate of change of voltage measured at the line side of the di/dt limiting reactors is proposed. The protection system was modeled and tested under different fault types and locations. The results show that the proposed method of HVDC grid protection is feasible using the current hybrid dc breaker technology. A systematic procedure for setting the necessary protection threshold values is also demonstrated.
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