交直流混合微电网拓扑与基本控制策略综述

Overview on Topologies and Basic Control Strategies for Hybrid AC/DC Microgrid

交直流混合微电网综合了交流微电网和直流微电网的优点,是未来智能微电网的可能发展方向之一。从交直流混合微电网典型拓扑分析、控制方式间的切换、互联变流器的控制等三方面对国内外的最新进展进行了介绍,并重点对典型拓扑的组网特点、适用性和优缺点,主从控制、对等控制和分层控制等不同控制方式下交直流微电网间的切换策略,互联变流器的传统控制方法与"网–网"新型控制方法等进行评述,最后给出了未来交直流混合微电网在微电网群之间的互联控制技术、并/离网切换技术以及互联变流器电路结构设计、容量选取和最优控制策略设计等的研究方向。

Hybrid AC/DC microgrid combines the advantages of AC and DC microgrids, and it is one of the furore development directions for microgrid. We introduced the latest progress in research on hybrid AC/DC microgrid at home and abroad, covering the analysis of typical topologies, transition of control modes under master/slave control, peer-to-peer control and hierarchical control, and the control strategies of interlinking converters. Moreover, we emphatically reviewed the networking features, suitability, advantages and disadvantages of the typical topologies, transition strategies between different control modes of the hybrid AC/DC microgrid, the traditional control methods and new grid to grid control methods of the interlinking converters. Finally, we proposed some proposals on the interlinking technolo- gies of hybrid microgrids, transition strategies between grid-connected and off-grid, and circuit structures design, capacity selection and optimal control strategy of the interlinking converters.