A control strategy of microgrid voltage source inverter based on self‐learning sliding mode control

In island mode, voltage source inverter (VSI) supports the frequency and of microgrid. After complex load is connected, VSI control performance degraded, output has deviation, negative sequence, waveform distortion other problems, which further deteriorate power quality Different from traditional strategy that only focus on a single problem, proposed in this paper can deal with these three problems simultaneously. paper, self-learning sliding mode proposed. First, nonlinear smooth function used to design an expansion observer, estimate state internal uncertainties external disturbances system. Second, extended observer combined synovial technology realize disturbance rejection strategy. This improve stability under various working conditions without precise mathematical model. The simulation results show that, compared strategy, good robustness different conditions.