MATLAB-Based DSTATCOM and DVR System for Voltage Sag and Swell Mitigation

The MATLAB-based DSTATCOM and DVR system has demonstrated exceptional effectiveness in addressing voltage sags and swells within power systems. The system operates through continuous monitoring of power supply parameters and injects precisely calculated reactive power components to compensate for voltage irregularities. The implementation utilizes MATLAB R2009a's Simulink environment with custom control blocks including Phase-Locked Loop (PLL) synchronization, dq0 transformation algorithms for instantaneous power calculation, and PWM (Pulse Width Modulation) controllers for precise voltage injection timing. Key functional components include voltage sag detection algorithms that compare measured voltages with reference values using RMS calculation methods, and reactive current injection logic based on instantaneous power theory. The system architecture incorporates proportional-integral (PI) controllers for maintaining DC-link voltage stability and ensures fast response times through optimized sampling rates and discrete-time implementation. The robust platform provided by MATLAB R2009a facilitates reliable system operation with advanced numerical computation capabilities, enabling rapid identification and resolution of power quality issues. As power quality becomes increasingly critical in modern infrastructure, this MATLAB-based solution serves as an essential tool for maintaining stable power supply to sensitive equipment and critical facilities through its sophisticated simulation models and real-time compensation capabilities.