利用磁环构造配电线路边界的单端量全线速动保护(2)：基于电压行波峰值时间的保护原理

Taking the AC and DC distribution network as research objects, the steepness and the peak time of the mode voltage traveling wave are analyzed in the case of the internal and external faults. The peak time of the mode voltage traveling wave-based single-ended high-speed protection principle is proposed. The impacts of the fault types, the fault resistance, the fault inception angles, the branches, the neutral grounding modes and the transient interfaces on the proposed protection criteria are analyzed and the countermeasures are proposed. The theoretical analysis, simulation and experiment results show that the method is able to reliably identify the internal and external faults of the AC and DC distribution lines with the advantages of protecting the whole line at a fast speed without any simulation setting but only using the single-ended voltage.