Voltage sag mitigation employing dynamic voltage restorer with minimum energy requirements: Analysis and implementation

Abstract

The objective of this paper is to design and implement an economical and efficient single phase dynamic voltage restorer (DVR) that compensates for voltage sag conditions. In this paper, different techniques of voltage sag detection are compared according to their advantages and disadvantages. Root-Mean-Square (RMS) technique is employed to detect the voltage sag event, due to its simplicity and fast detection. In addition, different compensation methods have been addressed and in order to minimize the energy storage requirements, energy optimization method is employed. The presented concept has been validated experimentally using 1kVA SiC MOSFET-based inverter with a switching frequency of 50kHz, where the output voltage and current are 100V and 10 A, respectively. 2016, Institution of Engineering and Technology. All rights reserved.