基于逆变型分布式电源微电网保护的研究

Research on Micro-Grid Protection About Inverter Based on Distributed Generation

针对逆变型分布式电源的微电网不同于传统电源的控制方式、短路故障电流小和电流双向潮流流通等特点,讨论了微电网保护与传统电网保护的区别及分布式电源的接入对配电网的影响。通过介绍逆变型分布式电源的控制特点,总结了2种不同类型的微电网保护方法,即基于传统过电流保护方法和基于现代通信、计算机技术的数字网络化保护方法。

Considering the difference about controlling technology between traditional power and inverter based on distributed generation in which short circuit-current was limited, this paper discussed the difference between micro-grid protection and traditional power network protection and the influence of the distribution network when the distributed generation was inserted. By introducing the controlling characteristics of inverter based on distributed generation, two different kinds of micro-grid protection were summarized ： one was based on traditional over-current protection and the other was digital network protection based on modern communication and computer technology.