Improved Voltage Regulation in Hybrid Photovoltaic/Wind Using Modified Dynamic Voltage Restorer with Hybrid Control Scheme

The end-user load connected to micro-grid the highly sensitive to voltage disturbances. This study analyzed the improvement in the voltage regulation of hybrid PV/wind systems using Without Energy Storage (WES)-based Dynamic Voltage Restorer (DVR) by inserting voltage at a common point of the network to maintain the supply value at the load side. However, the controller of WES-based DVR is more important to improve the voltage regulation and Fault Ride through (FRT) capability in the hybrid network. The hybrid feedforward/feedback hysteresis control of WES-based DVR verifies the better response during various fault conditions as compared to open-loop control which is the novelty of this research. The positivity of the modified DVR and controller is verified through a test system modeled in MATLAB/Simulink-based simulation measures. The simulation results show better response during the transient and steady-state period and better voltage regulation during several three-phase fault conditions.