D-STATCOM for Voltage Sag and Swell Correction

In power systems, voltage stability is crucial as voltage fluctuations can damage electrical equipment and reduce its lifespan. D-STATCOM (Distribution Static Synchronous Compensator) technology serves as an effective solution for voltage stabilization control. Particularly, D-STATCOM can mitigate voltage sags and swells—common issues typically caused by transient events. The implementation typically involves real-time voltage monitoring using Phase-Locked Loop (PLL) algorithms to detect deviations, followed by reactive power injection/absorption through IGBT-based inverters. Control algorithms like Instantaneous Power Theory (p-q theory) or Synchronous Reference Frame (d-q theory) generate precise switching signals for voltage compensation. This makes D-STATCOM technology highly valuable for power system applications, with MATLAB/Simulink simulations often implementing PID controllers or fuzzy logic for dynamic response optimization.