Dynamic Voltage Restorer along with Active and Passive Filter for Power Quality Improvement in Distribution Network

As the time flies in past few decades there is rapid growth in the standard of electronic power devices, which are not linear, impacts in low quality of power. Low power quality manifests itself in uncommon current, frequency or voltage that can cause severe harm to the equipment used in customers premises. This article discusses some of the parameters that lead to low power quality such as instant voltage drop, voltage surge and current harmonics these are cancelled with combination of Dynamic Voltage Restorer (DVR) and Hybrid Active Power Filter (HAPF) which is very effective as well as more efficient custom power device used in electrical distribution networks. This paper also analyzes design of DVR with LC output filter and extract the result showing how HAPF is better than LC filter. Its appeal lies in rapid dynamic response to interference. The simulation of DVR alone and combination with LC and HAPF filter is done in this paper using MATLAB. The article outlines the efficiency of Dynamic Voltage Restorer (DVR) and HAPF filter device to eliminate voltage swells, voltage sags and harmonics in voltage distribution networks. The system deals with improvement in voltage profile and decrease in harmonics which is done with the help of regulator proposed, its work is to give voltage signal to the inverter in result of which switches of inverter get triggered (inverter comprises of Pulse Width Modulation techniques). The complete procedure of this system is presented in this paper.