微网研究中的关键技术

微网技术的研究成为分布式能源系统研究领域的热点之一。文章介绍了微网的组成部分、体系架构和运行状态，从技术内涵角度综述了微网研究中关键技术的研究现状，包括新型电力电子技术，故障检测与保护、通信技术，系统规划设计、运行控制与能量管理所涉及的系统监控体系、控制策略及方法、辅助服务、运行标准，单元级、系统级的建模仿真研究，微网经济性评估等。文章还指出，微网系统网络拓扑的优化设计及分布式能源单元的优化配置对实现整个系统效益最大化具有重要作用，对微网进行有效的经济性评估是有待深入研究的课题。

Key Technologies for Microgrids Being Researched

The microgrid technologies become one of key spots in the research on distributed energy systems. In this paper, the components, systemic structure and operation modes of microgrid are presented. From the viewpoint of technical connotation, the present research situation of key technologies for the microgrid is reviewed. These technologies include new power electronic converter technologies, fault detection and protection, communication technologies, planning and design of microgrid, as well as issues related to operation control and energy management such as supervisory and control architecture, control strategies and approaches, ancillary services, operation specification, modeling and simulation research in system level and unit level and microgrid economic evaluation. The authors also point out that the optimal design of microgrid topology and optimal configuration of distributed energy units are of significance for the implementation of maximum benefit of the whole microgrid. Besides, the effective economic evaluation of microgrid is a topic to be researched in detail.