Aiming at the complex coordinated control problems among numerous distributed generators (DGs) of wind turbines (WTs)

diesel generators (DSs) and battery storage system (BT) in an islanded microgrid

a hybrid control strategy combined peer-to-peer control and centralized control is proposed. In peer-to-peer control mode

an “economic output power limit (EOPL)” module and its control algorithm are designed to improve the power and frequency characteristics of DSs

and also improve their economic and flexible property for their parallel operations. The central controller of microgrid central control center (MGCC) implements the whole system optimization for various DGs discrete control activities like start-stop of WTs and DSs

charging-discharging of BT

and ensures economic stability

flexible and efficient operation control of the islanded microgrid. Simulations have shown its operation control performances under various conditions

and results have proved the validity of the proposed method. This work is supported by National High Technology Research and Development Program of China (863 Program) (No. 2014AA052001) and National Natural Science Foundation of China (No. 61273172).