Distributed Adaptive Control Strategy for Microgrids Considering Disturbance Effects

The application of communication network and programmable controller not only facilitates the design of control strategy for microgrids, but also increases the possibility of system subjected to various types of disturbance. For the unknown disturbance in the control input channel, the adverse effects of the disturbance on the conventional consensus based secondary control strategy for microgrids are quantitatively analyzed. Furthermore, a distributed adaptive integral sliding mode secondary control strategy is proposed. The dynamic performance of the proposed strategy in the presence of disturbance is investigated, and theoretical analysis proves that the strategy can eliminate the influences of the unknown disturbance. The proposed strategy can adaptively compensate for the disturbance without any prior knowledge or assuming that the disturbance accords with certain distributions, so as to ensure the restoration of frequency and voltage and achieve accurately active power sharing of microgrids. The simulation results illustrate the correctness and effectiveness of the proposed strategy in a variety of scenarios.