PERFORMANCE AND OPERATION OF DVR (DYNAMIC VOLTAGE RESTORER) UNDER FAULT CONDITION USING PI CONTROLLER

Abstract

The chief objective this research paper holds are improvement of the quality of power. One of the important characteristics for improving the quality of power is the THD i.e., Total Harmonic Distortion. A THD analysis with various injection transformer ratings of DVR is shown in Fig 16. With the help of the Fast Fourier Transform (FFT) analysis for the voltage signal to analyse the Total harmonic distortion (THD). Before moderation we have 24.12% THD, while after moderation, for PI controller it is 2.77 % THD and 2.15% for ANN controller. We have also learnt about various devices which are used for this purpose and further we investigated about the dynamic voltage restorer it’s constructional features. It’s working principle and various operating mode by which it improves the power quality in the supply and distribution network. All this work is shown by using MATLAB/ SIMULATION to observe real time operation of the DVR