直流电网潮流控制器研究与应用综述

Review on Research and Application of Power Flow Controller of DC Grid

多端直流输电与直流电网技术是解决新能源发电集中并网和远距离传输问题的有效方案。直流潮流控制器(DCPFC)是直流电网稳态潮流调节的核心装备,也可为直流短路暂态故障电流抑制提供限流能力。文中概述了直流电网的发展现状及其对DCPFC的需求,归纳对比了已有DCPFC的工作原理、优缺点和研究现状,着重分析了线间DCPFC的潮流转移原理、拓扑结构和样机进展,总结了故障限流型DCPFC的限流原理、拓扑结构和实验样机。最后,对DCPFC研发和应用中的关键问题进行了展望。

Multi-terminal DC transmission and DC power grid technology are effective schemes to solve the problems of centralized grid connection and long-distance transmission of renewable energy power generation. DC power flow controller(DCPFC) is the core equipment for DC power grid steady-state power flow regulation. It can also provide the current limiting capability for DC short-circuit transient fault current suppression. This paper summarizes the development status of DC power grid and its demand for DCPFC. It also summarizes and compares the working principle, advantages and disadvantages and research status of the existing DCPFC, emphatically analyzes the power flow transfer principle, topology and prototype progress of interline DCPFC,and summarizes the current limiting principle, topology and experimental prototype of fault current limiting DCPFC. Finally, the key problems in the research, development and application of DCPFC are prospected.