摘要
为了提升微电网切换到孤岛状态时的稳定性,提出了一个两层的混合控制策略。第一层是由连续的本地控制器控制每个分布式电源,本地控制器的设计是基于李雅普洛夫理论的线性矩阵等式技术,通过调整分布式电源子系统的设定点,使其达到最好的性能和合适的运行指数;第二层是通过分散监控控制进行协调,分散监控控制是建立在信息融合基础上,也就是使用广域测量系统,在有大的扰动情况下转换分布式电源子系统进入一个合适的运转状态。仿真结果表明,在事先计划的或者偶然情况下微电网的暂态稳定性得到了较大提升。
To enhance the stability of the micro-grid when switching to an island state, a two-layer control strategy is studied. The first layer consisting of continuous local controllers controls each distributed power unit, which is designed by means of the linear matrix equation technique based on Lyapunov theory, and through adjusting the set point of distributed power subsystem, achieves the best performance and suitable running index. The second layer is coordinated through decentralized supervisory control, the decentralized supervisory control is built on the basis of information fusion, which used wide area measurement system, and in the case of large distribution, the subsystem is converted into a proper operating state. Simulation results show that the transient stability of microgrid in the pre-planned or accidental cases are greatly improved.
出处
《湖南工业大学学报》
2015年第1期52-58,共7页
Journal of Hunan University of Technology
基金
湖南省自然科学基金资助项目(2015JJ2045)
国家自然科学基金资助项目(61174075)
关键词
混合系统
分层控制
微电网
hybrid system
hierarchical control
microgrid
