To improve the dynamic performance and robustness of a distribution static synchronous compensator (D-STATCOM) control system

an input-output feedback linearization technique combined with integral sliding mode control method for D-STATCOM is presented. Input-output feedback linearization technique enables the active current and reactive current decoupling for D-STATCOM

and eliminates the non-linear dynamics on capacitor voltage at DC side

which makes it much stable. The integral sliding mode control is also adopted to improve the D-STATCOM control robustness. The simulation and physical experimental results show that the voltages at point of common coupling (PCC) and DC voltage of D-STATCOM could track their references quickly and accurately. This control strategy is insensitive to external disturbances and parameter variations. This work is supported by Ph.D. Programs Foundation of Ministry of Education of China (No. 20110181120007).