Backstepping Super-twisting Sliding Mode Control for Photovoltaic Inverter of Master-slave Microgrid
In order to improve the robust performance of photovoltaic power generation control system,an adaptive backstepping super-twisting sliding mode controller with high-order sliding mode differentiator is proposed.Firstly,the sliding mode differentiator is employed as the virtual control variable filter,which avoids the difficulty of obtaining the derivative and the saturation of the controller in the traditional backstepping method.Secondly,by designing the filtering error compensation signal,the control of two state variables with a single input is realized.Thirdly,for the parameter perturbation of inverter-side filter,an improved adaptive estimation algorithm is used to obtain real-time estimated values of parameters.Finally,in order to suppress the disturbance of the inner loop of the current,super-twisting sliding mode control is introduced,and the Lyapunov theorem of stability is used to prove that the control system is stable and the estimation error converges.The simulation results based on the master-slave island photovoltaic and energy-storage microgrid system show that the proposed controller has better transient performance and chattering suppression effect than the terminal sliding mode control.
Super-twisting algorithmparameter estimationhigh-order sliding mode differentiatorphotovoltaic and energy-storage microgrid
万方数据
维普
