电力系统继电保护中方向阻抗型继电器仿真，在分布参数下构造“0接线”阻抗继电器模块，可对三相短路、两相短路和单相短路的出口故障、末端故障和外部故障进行仿真，得到各相继电器的相位，是研究阻抗保护的有效工具。-Power system protection in the direction of the impedance relay simulation, the distribution parameters structure " 0 Connection"　impedance relay module, the simulation of three-phase short circuit, two-phase short-circuit and export single-phase short circuit fault, the end of the fault and external fault, the phase of each phase relay is an effective tool to study the impedance protection.