Comparative Evaluation of Conventional Fuzzy and Type-2 fuzzy Controllers to Offset Sag and Swell in Voltage for Power Quality Improvement

Abstract

Voltage sag and swell impact sensitive equipment in commercial and industrial environments, posing a serious risk to power systems performance and stability. A compensator is the ideal use for a dynamic voltage restorer (DVR) in order to lessen the effects of voltage sag and swell. In this work, the load terminal voltage is managed using proportional and integral (PI) controllers while the source voltage experiences a 20% voltage sag and swell. The reference load voltage for voltage source converter switching is produced using the synchronous reference frame algorithm. Conventional FLC and Type-2 FLC are used to obtain optimal settings for the gains of PI controllers. The usage of fuzzy logic controllers (FLC) and Type-2 fuzzy logic controllers (T2FLC) in Dynamic Voltage Restorers (DVR) to reduce the impact of voltage sag and swell is examined in this study. The goal of the research is to find improvements in voltage stability and power quality by contrasting the performance of these two control systems. With the aid of MATLAB software, the DVR's control approach is simulated for both controllers, and their performance is examined.