微电网运行控制技术要点及展望

Key Points and Prospect of Microgrid Operation and Control Technologies

近年来,微电网技术作为提高新能源接入稳定性和可靠性的重要技术手段得到了广泛关注。聚焦微电网运行控制技术的最新进展,对国内外相关研究进行了梳理归纳,包括微电网拓扑结构的多元化、源荷不确定性、功率变换器的多样性以及通信方式的取舍等技术难点,微电网运行控制策略与规划方案耦合设计、微电网内部及单元间交互稳定性、虚拟同步控制与频率调节以及先进功率变换等技术关键,以及典型的微电网运行控制技术及其优缺点。最后,对下一步微电网运行控制的研究动向等进行了分析,以期充分展示该技术领域的最新研究成果,并对后续研究进行探讨和展望。

In recent years, microgrid technologies have been widely concerned as an important technical means to improve the stability and reliability of new-energy connected system. The latest development in microgrid operation and control is presented, with the relevant research domestic and abroad summarized. The technical difficulties are fully discussed, such as the topology variety, uncertainty in both source and load, power conversion diversity and communication mode design. Meanwhile, the key issues in microgrid control are explored in detail, including coupling design between the control strategy and planning scheme, stability in a single microgird and between each other, virtual synchronous control and frequency regulation, and power converter control as well. Then, the typical technologies on microgrid operation and control are analyzed. Finally, the research trend of microgrid operation and control is discussed, so as to show the latest works and provide a prospect of this technology.