Mitigation of Different Type Voltage Sags in Low Voltage Distribution Systems Using Dynamic Voltage Restorer

The main problems of the voltage sag in low voltage distribution systems due to sensitive loads. Voltage sags can caused malfunction in the distribution system. In order to protect voltage sags in the network a device which called Dynamic Voltage Restorer (DVR) is installed between the incoming supply and the sensitive loads. It is found that the DVR is an effective solution for the protection of sensitive loads from voltages sags. This paper discusses a DVR operation as a protection device, analysis of its controller and the active power injection requirements in the system. In this paper also highlights the different types of fault in both single phase and three phase fault. The experimental results validate the effectiveness of the device acts a protection scheme.