Frequency Control of Electric Power Microgrids Using Distributed Cooperative Control of Multi-agent Systems

Distributed cooperative control of multi-agent systems is used to implement the secondary frequency control of microgrids. The proposed control synchronizes the frequency of distributed generators (DG) to the nominal frequency and shares the active power among DGs based on their ratings. This frequency control is implemented through a communication network with one-way communication links, and is fully distributed such that each DG only requires its own information and the information of its neighbors on the communication network graph. Due to the distributed structure of the communication network, the requirements for a central controller and complex communication network are obviated, and the system reliability is improved. Simulation results verify the effectiveness of the proposed secondary control for a microgrid test system.