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Power Quality Improvement of Distribution System Using DVR with H-bridge Topology and Differential Inverter Control

The research paper presents a novel Dynamic Voltage Restorer (DVR) with differential inverter topology. It is a new member of the Custom Power Device (CPD) family. The load voltage maintenance is difficult when the power system is subjected to faults, sags, swells etc. The advantages of this DVR, which uses differential topology, over conventional DVR are the reduction in filter size and improvement of power quality of load voltage and current. The voltage stability and its maintenance is very important in distribution systems. This ensures the smooth functioning of all equipment connected in the distribution network. A scaled down DVR model is implemented, and verified by simulation and experimentation.