Voltage Optimization Control Strategy for Islanded Microgrid Source-Grid-Load Active-Reactive Power Coordination Based on Collaborative Di-MPC

To cope with the volatility and randomness of wind power, photovoltaic (PV) load demands in islanded microgrid, also to ensure safety economic operation microgrid system. A collaborative Distributed model predictive control (Di-MPC) based voltage optimization strategy is proposed, which considers strong coupling characteristic active reactive power due impedance ratio requirements real-time robustness as well. By coordinating controllable devices source-grid-load side proposed aims make full use regulation capability each device. Firstly, by considering different operating characteristics devices, a multi-time scale distributed optimal established. It divides process into long-time short-time optimizes for respective objective functions variables time scales. Secondly, Di-MPC-based proposed. With collaboration mechanism, output increments generators (DGs) are solved scale, errors fixed. Finally, simulation results show that compared traditional method centralized (CMPC) method, can effectively reduce deviation fluctuation at node while ensuring