A New Distribution System Power Quality Mitigation Method Using Recursive Least Squares Controlled Dynamic Voltage Restorer

Nonlinear loads are one of the main reasons why power quality problems happen in modern power distribution networks. These loads cause problems, including voltage sag, imbalance, and harmonics, which make the electrical network less reliable and less efficient. This study suggests a new architecture that includes a Dynamic Voltage Restorer (DVR) control method to help fix these problems with power quality. The control technique uses a Recursive Least Squares (RLS) method to get accurate and changing phasor estimates, which let the DVR respond better to changes in power quality in real time. The IEEE-13 node test feeder is used to test how well the planned system works by simulating different failure scenarios and load conditions, including voltage sag, imbalance, and harmonic distortion. Also, the DVR's performance with and without a filter is compared to see how well it can compensate for sagging when the load is not linear. MATLAB/Simulink is used for simulation and modelling, which gives a full picture of how the DVR works at different points in the system. The results show that adding the RLS-based control mechanism greatly enhances the quality of the voltage and keeps the system stable. This shows that the proposed method can improve the resilience and power quality of distribution systems that are exposed to nonlinear and defective operation situations.