SVPWM Switched DSTATCOM for Power Factor and Voltage Sag Compensation

In a power distribution network of a power utility or industry, the reactive power management plays a major role in reducing distribution loss and maintaining constant distribution voltage. Voltage source PWM inverter based reactive power generator has fast response to reactive power demand and hence can be used for power factor improvement and voltage support. With the availability of new generation DSPs with inbuilt event manager module, the space vector PWM (SVPWM) switching patterns can be generated easily. This paper proposes SVPWM switched DSTATCOM for power factor and voltage sag compensation. The paper presents the simulation studies on SVPWM switched DSTATCOM in power factor control mode. It also gives the mathematical model of DSTATCOM in voltage sag compensation mode. The simulation results show that the space vector PWM strategy can be used for power factor and voltage compensation. Further, experimental studies on SVPWM switched DSTATCOM have been presented to validate the control philosophy.