Abstract：Adaptive auto-reclosing in AC system discriminates fault properties using the coupling relationship between the faulty phase and sound phase. After the DC line fault is cleared, the electrical quantities of the DC system keep constant, and there is no coupling between the sound and faulty pole. On the basis of the coupling of the high voltage dc (HVDC) transmission lines and the high controllability of the converters, a fault property discrimination method is present by injecting characteristic signals into a DC faulty line. The electrode coupling characteristics of HVDC transmission lines, the principle of characteristic signal generation and the selection are first analyzed in detail. Then the characteristic signals are injected into the sound pole through the additional control strategy of the converter station. The faulty line couples the corresponding characteristic signal. This characteristic signal is used to identify the fault properties by the differences of the propagation characteristic between the two states, the fault existence and disappearance states. The simulation results verify the effectiveness of the proposed method in this paper.
宋国兵,王婷,张晨浩,吴磊. 利用健全极MMC注入特征信号的直流线路故障性质判别方法[J]. 电工技术学报, 2019, 34(5): 994-1003.
Song Guobing, Wang Ting, Zhang Chenhao, Wu Lei. DC Line Fault Identification Based on Characteristic Signal Injection Using the MMC of Sound Pole. Transactions of China Electrotechnical Society, 2019, 34(5): 994-1003.
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2019, Vol. 34 
