Control of nonlinearity and two outputs variables decoupling in cascade STATCOM
大容量链式静止同步补偿器的非线性双输出解耦控制

High power cascade static synchronous compensator(STATCOM) is a typical nonlinear system; the control theory and algorithm of which are complex and abstract. Based on the dynamic mathematical model of the active and the reactive currents in a cascade STATCOM, we develop a nonlinear dynamic control strategy for the reactive power; and using the control method of two-input two-output linearization, we achieve the decoupling control for the output variables. The simulation and experimental results show that this nonlinear and two-output decoupling controller has a desirable dynamic performance, when a short circuit fault occurs or a high-power load abruptly changes.