A novel decoupling control based on D-statcom

At present series decoupling and state feedback decoupling are commonly used decoupling control methods. In the three-phase voltage-source converter, decoupling control can effectively improve the dynamic and steady-state performance, but the performance of decoupling controller has great relations with the system parameters detection precision, and the robustness and dynamic performance of series decoupling is superior to that of state feedback decoupling. First in the paper the mathematical model of Distribution Static Synchronous Compensator (D-STATCOM) is established under synchronous rotation coordinates, then a controller is designed based on series decoupling control, also a comparison and analysis of robustness and dynamic performance between series decoupling and state feedback decoupling is made, finally the correctness and effectiveness of the theory is validated through simulation.