分布式电源接入配电网容量及保护研究

摘要

分析了分布式电源容量对配电网三段式电流保护的影响，介绍了现有含分布式电源配电网保护方案。提出了对三段式电流保护进行改进，分布式电源上游加装方向性元件，下游根据分布式电源接入容量修改电流保护整定值，并通过仿真验证了方法的可行性，其具有一定的实用价值。%Analysis was made to the capacity impact of distributed generation on the over-current protection of distribution network. Introduction was made to the existing distribution network protection schemes with distributed generation. This paper raised carrying out improvement of over-current protection, the distributed generation upstream equipped with directional element and the current protection setting value of distributed generation downstream modified according to the distributed generation access capacity. Simu-lation proves it is a feasible method with certain practical value.