Cascaded Fuzzy Logic Controller for DVR Based Power Quality Improvement Voltage Sag/Swell Mitigation

Customers' demands for excellent power quality have greatly grown recently. Conventional electrical gadgets, sometimes referred to as D-FACTS devices, that guards sensitive loads against voltage fluctuations in distribution networks includes D-STATCOM, DVR, and UPQC. Two types of manufacturing procedure repercussions may be distinguished: increased sensitivity to intermittent failures (such voltage sag in distribution systems) and nonlinear and unbalanced loads. The DVR is a piece of equipment that was linked in series and controls the loading voltage by supplying the system with voltage. DVRs are typically placed in networks of distribution between sources and feeders of sensitive loads. The primary responsibility is to prevent any disconnections during disturbances by quickly supporting the load voltage (using a fast detection algorithm). The cascaded fuzzy logic controller techniques presented in this study are widely employed in voltage transmission and distribution systems to compensate for voltage sag and swell. This project describes a dynamic voltage restorer based on the average identifying methodology for single-phase power systems, in addition to discussing the usage of DVR to restore voltage sag and swell in distribution infrastructure using an alternative per-unit value approach (average detection). The results of the three-phase voltage sag and swell simulation have been given by SIMULINK/MATLAB. The Settling time obtained using Cascaded FLC controller is 0.15s and overall efficiency of the paper is 91.9%.