| Abstract: |
The increasing integration of nonlinear loads and renewable energy sources in modern electrical distribution systems has significantly deteriorated power quality, manifesting as voltage fluctuations, harmonic distortions, and reactive power imbalances. This research investigates the design and modeling of a Distribution Static Synchronous Compensator (DSTATCOM) employing Pulse Width Modulation (PWM) switching and Hysteresis Current Control (HCC) techniques to enhance grid power quality. The study hypothesizes that the combined implementation of PWM and HCC will effectively mitigate voltage sags, reduce Total Harmonic Distortion (THD), and improve power factor to meet IEEE 519 standards. A comprehensive simulation model was developed using MATLAB/Simulink for a three-phase distribution system with various load conditions. The methodology encompasses system design, controller implementation, and comparative performance analysis. Results demonstrate that the proposed DSTATCOM achieves voltage regulation within ±2%, reduces THD from 28.4% to 3.2%, and improves power factor from 0.72 to 0.98 under varying load scenarios. The hysteresis current controller exhibits superior transient response with settling time below 40ms compared to conventional PI controllers. This research validates the efficacy of advanced control strategies in DSTATCOM applications for sustainable power distribution networks. |
