Mathematical Modelling Of DVR with Two Stage Feedback Controller

In the last decade significant use of CPDs (Custom Power Devices) utilization is drastically increased due to awareness of PQ(Power Quality) problems and as per statics of power grid and power, the shortage is reduced from 10% to 0.5% in the period 2009-10 to 2019-2020. Now the focus shifted to the most attractive area reliability of power supply. The major hazards in the reliable power supply, power quality issues harmonics, voltage profile instability due to voltage sag, voltage swells. Voltage sag is the most common as well as critical problem in the transmission and distribution division. After 2012 north grid failure in India shows the failure of the voltage of profile importance and in this case directly and indirectly above 30 corers of people affected in India. This article deals with mathematical modeling of DVR (Dynamic Voltage Restorer) using a feed forward network (artificial neural networks) and the power quality improvements when it is integrated with the grid system to reduce the impact of issues like voltage sag and swell which are occurred in the grid connected system. The response of open loop and closed loop DVR voltage profile is also discussed in this paper and all these conditions are tested on the MATLAB platform.