Performance of D-STATCOM for Voltage Sag and Swell Mitigation

Power quality is actually the quality of the voltage that is being addressed in most cases. Power quality disturbances such as voltage sag, voltage swell have been identified as the major sources of power quality problems. This book involves in-depth analysis of power quality improvement device called as Distribution Static Synchronous Compensator (DSTATCOM) to alleviate voltage sags and swells. In this book, a Synchronous Reference Frame (SRF) theory, Instantaneous Active and Reactive Current (IARC) theory, and Proportional-Integral (PI) controller are used to generates a reference signals and control the operation of DSTATCOM, aimed at power quality improvement. The performance of these control techniques has been analyzed using time-domain MATLAB/Simulink software under three-phase linear and nonlinear load conditions. The obtained MATLAB simulation results from SRF, IARC and PI control schemes are excellent or even slightly better in IARC control in compared with SRF and PI control.