Application of distributed predictive control in coordinated control of microgrid

This paper proposes a distributed coordinated predictive control scheme for the power balance and economic dispatch problems of microgrid systems. We design the distributed coordinated predictive controllers for the wind power generation subsystem and solar power generation subsystem by minimizing a suitable objective function, respectively. The objective function is chosen based on the principle that the wind power subsystem is operated as the primary generation system, the solar power subsystem is considered as the auxiliary generation system, and the battery bank is only activated when the wind and solar power subsystem can't satisfy the power demand. The output of the distributed predictive controller is regarded as the reference input of each subsystem, so that it can respond to the load change in full operation condition, and distribute the output power of each subsystem reasonably. The simulation results show that the proposed distributed coordinated predictive control scheme can allocate the output power of subsystems reasonably under varying environment conditions, which not only can satisfy the load demand but also attenuate excessive fluctuations of output power to protect the power generation equipment. © 2020, Jilin University Press. All right reserved.