基于高阶滑模的STATCOM系统有限时间鲁棒控制

摘要

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.%为提高静止同步补偿器(static synchronous compensator,STATCOM)控制系统的动态性能和鲁棒性,提出一种基于高阶滑模控制的STATCOM有限时间鲁棒控制方法.该方法首先对强耦合、非线性的STATCOM 系统采用逆系统的方法进行线性化解耦,根据解耦后的系统状态特性,对无功补偿电流与直流侧电容电压分别采用超螺旋与螺旋算法进行控制器设计,这2种控制方法不仅在有限时间内分别快速稳定无功补偿电流与直流侧电压,还对系统不确定性具有一定的鲁棒性.仿真结果验证了所提出方法的有效性.