Abstract：In the flexible DC system, ship DC system and rail transit system, the amplitude and rise rate of the short-circuit fault current are very high. It is difficult for the existing DC circuit breaker to cut off the fault quickly and reliably. Using the high temperature superconducting tape with fast current limiting characteristic, the superconducting current limiting DC switching can react within 1 ms automatically. Then it can limit the fault current to a very low level, which greatly reduces the difficulty and burden of the DC circuit breaker. In this paper, the characteristics of the superconducting current limiter were introduced first. Then three kinds of the superconducting current limiting DC switching technologies were analyzed: superconducting current limiting passive oscillation DC circuit breaker, superconducting current limiting active current injection DC circuit breaker, and superconducting current limiting hybrid DC circuit breaker. The interruption process of 200kV/30kA superconducting current limiting passive oscillation DC circuit breaker was simulated. The 10kV/10kA superconducting current limiting active current injection DC circuit breaker interruption test and the 55V/55A superconducting current limiting hybrid DC circuit breaker interruption test were completed.
王建华, 项彬, 杨騉, 高磊, 刘志远. 超导限流直流开断技术研究[J]. 电工技术学报, 2019, 34(20): 4196-4207.
Wang Jianhua, Xiang Bin, Yang Kun, Gao Lei, Liu Zhiyuan. Superconducting Fault Current Limiting DC Current Interrupting Technology. Transactions of China Electrotechnical Society, 2019, 34(20): 4196-4207.
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