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  • Open Access


    Adaptive Reclosing Scheme Based on Traveling Wave Injection For Multi-Terminal dc Grids

    Peng Han1,*, Xinchen Zhao1, Yannan Wu1, Zhiyu Zhou2, Qi Qi3

    Energy Engineering, Vol.120, No.5, pp. 1271-1285, 2023, DOI:10.32604/ee.2023.027489

    Abstract The hybrid dc circuit breaker (HCB) has the advantages of fast action speed and low operating loss, which is an ideal method for fault isolation of multi-terminal dc grids. For multi-terminal dc grids that transmit power through overhead lines, HCBs are required to have reclosing capability due to the high fault probability and the fact that most of the faults are temporary faults. To avoid the secondary fault strike and equipment damage that may be caused by the reclosing of the HCB when the permanent fault occurs, an adaptive reclosing scheme based on traveling wave injection is proposed in this… More >

  • Open Access


    A Fault Current Limiting Hybrid DC Circuit Breaker

    Lei Huang*, Qian Zhang, Wenlei Liu, Ruixue Liu

    Energy Engineering, Vol.119, No.2, pp. 621-636, 2022, DOI:10.32604/ee.2022.016769

    Abstract Due to the low impedance characteristic of the high voltage direct current (HVDC) grid, the fault current rises extremely fast after a DC-side fault occurs, and this phenomenon seriously endangers the safety of the HVDC grid. In order to suppress the rising speed of the fault current and reduce the current interruption requirements of the main breaker (MB), a fault current limiting hybrid DC circuit breaker (FCL-HCB) has been proposed in this paper, and it has the capability of bidirectional fault current limiting and fault current interruption. After the occurrence of the overcurrent in the HVDC grid, the current limiting… More >

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