C. Sharmeela∗ and M.R. Mohan∗∗
Custom power, D-STATCOM, SSC, multi-level inverter, SPWM, PSCAD/EMTDC
The main purpose of the Distribution STATic COMpensator (D- STATCOM) and Static Series Compensator (SSC) commercially called as Dynamic Voltage Restorer (DVR) is that it injects reactive power in shunt and series, respectively, with a distribution feeder to reduce the effect of short-term voltage sags, swells and momentary interruptions in the distribution system. This paper presents a Voltage Source Converter (VSC) based multi-level D-STATCOM and DVR controlled by sinusoidal PWM for the mitigation of voltage sag/swell and voltage sag respectively. The modelling and transient simulation have been carried out by PSCAD/EMTDC. The effectiveness of multi-level D-STATCOM for the mitigation of voltage sag/swell and DVR for the mitigation of voltage sag has been demonstrated by case studies.
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