Secondary Voltage Control Strategy of Microgrid with Wind Power Based on Distributed Multi-Agent System

Microgrid is an effective means to achieve flexible management and control of distributed power sources. Compared with the traditional centralized secondary control mode, the distributed coordinated secondary control strategy has higher flexibility and reliability. A secondary voltage control strategy of isolated island microgrid for distributed multi-agent system is proposed. Think of distributed power as an agent in the system, and secondary voltage control is equivalent to the tracking synchronization problem of a multi-agent system. Based on linear state feedback, a distributed controller is designed, in which the output of the state estimator is used instead of the actual state of the system, and then the event trigger controller is used to update the system state. Using a certain communication network, each agent uses the information of local and adjacent agents to coordinate with each other to ensure that the voltage of the microgrid recovers the rated value, avoiding the dependence on the centralized controller. This control strategy allows agents to exchange information only at the moment of event triggering rather than continuous exchange in real time, reducing the amount of information exchanged for data and reducing the requirements for communication networks. The island microgrid test system was used to verify the effectiveness of the proposed control strategy.