基于分布式电源的含新能源配电网自适应保护方法

Adaptive Protection Method of Distribution Network Including New Energy Based on Distributed Generator

传统配电网原有的三段式电流保护已不适用于含新能源配电网系统,为了解决分布式电源接入原有配电网后产生的继电保护问题,在最大程度上保证能源的有效利用,配电网平稳安全运行。引入自适应保护的概念并在此基础上加以改进,提出了含新能源配电网自适应保护方法,根据含新能源配电网的故障特性,分别在DG上、下游,相邻馈线位置配置保护方案。最后通过仿真验证了自适应保护方法的可靠性。

The original three-stage current protection of the traditional distribution network is no longer suitable for the distribution network system with new energy,in order to solve the problem of relay protection after the distributed generator connected to the original distribution network,and in the maximum extent to ensure the effective use of energy,distribution network can run smoothly and safely.In this paper,the concept of adaptive protection is introduced and improved on the basis,and proposes an adaptive protection method for distribution network with new energy.According to the fault characteristics,protection method is configured respectively in the upstream,downstream and adjacent feeder locations of DG.Finally,the reliability of the adaptive protection method is verified by simulation.