基于光伏并网的网源协调保护配合方法研究

针对光伏并网后对原电网结构的改变，对光伏电源本体保护在光伏电源接入后发生短路时的故障特性问题展开了一系列研究和分析，通过将理论和仿真结果结合，对光伏并网后对电网电流保护所产生的作用进行说明，深入研究了孤岛保护、光伏低电压穿越两者与自动重合闸间的配合关系，指出并网后故障位置的不同以及光伏并网位置差异对系统保护所产生的影响，最后给配电网保护提出配置方案。

Research on Coordination and Protection of Network Sources Based on Grid-Connection of Photovoltaic

In view of the change of the original grid structure after connection of photovoltaic power, a series of research and analysis are carried out on the fault characteristics of the photovoltaic power source protection when it is short circuited after the photovoltaic power is grid-connected. By combining the theory and simulation results, the effects of the photovoltaic power grid-connection on the current protection of the power grid are expounded. And the islanding protection, photovoltaic low-voltage crossing and their coordination with the automatic reclosing are deeply studied, the effects of fault location differences and connection location differences on the system protection with photovoltaic power grid-connected are pointed out. Finally, a configuration scheme for the distribution network protection is given.