一种互联微电网群的频率分布式协调控制策略

A Frequency Distributed Coordinated Control Strategy for Interconnected Microgrid Clusters

多个微电网常常采用电压源型变流器(VSC)进行柔性互联,以增强系统运行的可靠性,但同时也带来了多个微电网间的频率解耦问题。为此,基于多智能体思想,提出了一种基于VSC互联的多微电网群频率的一致性控制策略。所提策略通过微电网间的电压源型变流器来实现多微电网间频率的相互支撑,并基于一致性控制理论来协调多个微电网内的可控单元,不仅能实现微电网频率的快速恢复,还能实现微电网内的扰动由多个微电网按容量承担,提高了系统的稳定系性。最后,通过实验验证了所提策略的可行性。

Multiple microgrids often use voltage source converters(VSC)for flexible interconnection to enhance the reliability of system operation,but it also brings about frequency decoupling issues between multiple microgrids.Therefore,a consistency control strategy for multi microgrid frequency is proposed based on VSC interconnection,based on the idea of multi-agent.The proposed strategy achieves mutual support of frequencies among multiple microgrids through voltage source converters between microgrids,and coordinates controllable units within multiple microgrids based on consistency control theory,this not only achieves rapid recovery of microgrid frequencies,but also enables disturbances within the microgrid to be borne by multiple microgrids according to their capacity,improving the stability of the system.Finally,the feasibility of the proposed strategy is verified through experiments.