Finite time robust control of STATCOM systems based on higher order sliding mode

To improve the dynamic performance and robustness of the static synchronous compensator (STATCOM) control system, this paper proposes a STATCOM finite time robust control method based on higher order sliding mode control. Firstly, the strong coupling, nonlinear STATCOM system was linear decoupled by inverse system method. According to the system state after decoupling, twisting algorithm and super-twisting algorithm were adopted in reactive power compensation current and DC side capacitor voltage, respectively. These two control methods not only compensated reactive power current and DC side capacitor voltage rapidly in limited time but also had some robustness to the system uncertainties. Simulation results show the effectiveness of the proposed method.