TL;DR: In this article , a three level H-bridge topology cascaded multilevel inverter based DSTATCOM is used to compensate the reactive power with the injection of shunt current.
Abstract: In modern information society requirements and expectations associated with power quality have become increasingly important. Among the different disturbances affecting the power quality, the voltage sag are considered as a most important power quality problem faced by utilities & industrial consumer & equipment like PLC (Programmable Logic Controller), ASD (Adjustable Speed Drives) which need to be fully investigated. Custom power device are effective means for mitigating the voltage related issues prominently voltage sag, unbalanced load voltage, voltage regulation, sag/ swell etc. by compensating the reactive power with the injection of shunt current. In this paper by using three level H-bridge topology cascaded multilevel inverter based DSTATCOM the Power Quality issues are compensated effectively.