Numerical Simulation and Modeling of Improved PI Controller Based DVR for Voltage Sag Compensation

Voltage sags are a common problem in power systems and can have a detrimental effect on the operation of electrical equipment. A voltage sag occurs when the voltage level drops below a certain threshold for a short period of time. This can cause equipment to malfunction or shut down, leading to significant economic losses. The Dynamic Voltage Restorer (DVR) is a widely used technology for mitigating voltage sags in power systems. The DVR works by injecting a voltage waveform into the system to compensate for the voltage sag. Voltage sags in power systems can cause disturbances in electrical equipment and result in significant economic losses. This research aims to develop an improved PI controller-based DVR (Dynamic Voltage Restorer) for voltage sag compensation in power systems. The proposed system utilizes numerical simulations and modeling techniques to study the performance of the controller under different operating conditions. The results show that the improved PI controller-based DVR effectively compensates for voltage sags and significantly improves the power quality of the system. Numerical simulations were performed using MATLAB/Simulink to analyze the performance of the controller under different operating conditions. The simulations were carried out on a three-phase power system. The voltage sag was induced using a fault generator. The performance of the improved PI controller-based DVR was evaluated based on various parameters, such as the compensation time, voltage sag magnitude, and load variation. The results were compared with those obtained using a conventional PI controller-based DVR.