串联和并联结构的多微网系统分层协调控制策略

Hierarchical Coordination Control Strategy for Multi-microgrid System with Series and Parallel Structure

根据多微网间的串联和并联组网结构,设计了串、并联不同结构的多微网系统两级分层控制方案。以多微网系统允许出现的有效运行状态为基础,依据其当前状态和触发事件制定微网运行状态的转换。针对多微网系统的联络线功率控制、并网和孤岛模式切换,提出串、并联结构的多微网中央控制器之间的协调配合策略。结合云电科技园智能微网的工程建设,利用MATLAB/Simulink软件搭建串联和并联结构的多微网模型;仿真分析联络线功率调节、不同模式转换和同步过程中微网的动态特性。仿真结果验证了控制策略的正确性和有效性。

According to the series and parallel structure of multi microgrid system, a two-level hierarchical control scheme is designed for multi-microgrid system with series and parallel structure. Based on the available operation states of multi microgrid system, a scheme of operation state transition is formulated in its current operation state and trigger event. Then the mierogrid central controller （MGCC） coordination strategy between multi-microgrid with series and parallel structure for the tie-line power control and mode switch of multi-microgrid system is proposed. By referring to the construction of the smart microgrid of Yunnan Electric Power Science Park, the MATLAB/Simulink software is used to build the multi microgrid system with series and parallel structure. The dynamic characteristics of tie-line power control and different operation status switching and synchronizing are analyzed. The results verify the effectiveness and correctness of the proposed control strategy.