柔性直流配电网保护策略综述

Overview of Protection Strategies for Flexible DC Distribution Network

摘要:

随着新能源的日益兴起，越来越多的分布式电源和储能器件集成到配电网中，推动了新兴直流系统的发展，也给传统交流配电系统的保护方案带来挑战。柔性直流配电系统安全稳定运行的关键在于如何对故障进行正确识别与快速隔离。针对几种柔性直流配电系统的典型拓扑结构，对常见的故障识别与保护方法进行了总结分析，并对柔性直流配电系统故障保护的未来发展提出了展望。

Abstract:

With the increasing rise of new energy, more and more distributed generation (DG) and energy storage devices are integrated into distribution network, which promotes the development of emerging DC systems and poses challenges to the protection schemes of traditional AC distribution systems. The key to safe and stable operation of flexible DC distribution systems lies in how to correctly identify and quickly isolate faults. Aiming at several typical topological structures of flexible DC distribution systems, the identification and protection method for common faults are summarized and analyzed. And then, the prospects for future development of fault protection in flexible DC distribution systems are proposed.