Dynamic voltage restorer based on robust tracking control

In order to overcome the impact of parameter uncertainty on the performance of dynamic voltage restorer, dual closed loop robust tracking control strategy is proposed. This papar designs the controller based on the mixed sensitivity method, acquires high robustness tracking accuracy in the vicinity of fundamental frequencies in the face of system parameter variations by appropriate weighting function selection, At the same time, thanks to the regional pole placement strategy, the response speed of the system meets the needs of practical engineering, the conflict between the steady-state accuracy and response speed is solved partly. Controller design priors to consider environmental factors which lead to uncertainty parameter perturbations and improves the robustness of the system. The feasibility of the proposed controller is verified through theory analysis and simulation results.