Secondary control for microgrid considering state constraint and consensus
In order to solve the deviation problem caused by the droop control of the AC microgrid,the secondary control is adopted to adjust the output voltage and frequency of the distributed generations.The microgrids are considered as distributed multi agent systems,and the agents communicate with each other through a sparse network.By using the multi agent consensus protocol,a secondary voltage and frequency controller based on the barrier Lyapunov function and an adaptive fuzzy system is proposed.The controller designed by the barrier Lyapunov function cannot only maintain the stability of the system,but also limit the output voltage and frequency within the prescribed range.The adaptive fuzzy system can be used to estimate the changes of some parameters in the system,which improves the robustness of the controller.The strict proof of stability is given.Through the simulation test of the load change and the change of the topology structure,the effectiveness of the proposed control scheme is verified.
万方数据
维普
