基于拟连续互补滑模的储能变流器改进自抗扰控制OA

Due to the randomness and volatility of new energy power generation,this paper designs a sliding mode active disturbance rejection composite control strategy based on the quasi-continuous algorithm to ensure the stable operation of the power grid.This strategy is applied to the power conversion system(PCS)to improve the PCS operation performance.The proposed system has better transient characteristics in the face of different disturbances to ensure the stability of the DC bus voltage.PCS control adopts a PQ control strategy,which usually involves two control loops:a power outer loop and a current inner loop.The power outer loop adopts PI control to ensure the power conservation of the converter in the process of grid connection,and provides a reference value for the current inner loop of the later stage.The fixed-time disturbance observer(FTDO)is adopted in the inner current loop,which can quickly and accurately track and compensate for the system state and internal and external disturbances.At the same time,a quasi-continuous complementary sliding mode is designed as a feedback controller to ensure that the dynamic characteristics of the system are smooth and jitter-free,and the robustness of the system is guaranteed.Finally,an experimental platform is built to validate the feasibility of the proposed control strategy.The experimental results show that the control strategy proposed in this paper effectively improves the transient response performance and the operation stability of the system.