Compensador série de tens？o em onda quadrada para mitiga？？o de afundamentos de tens？o

the most known svc are the dvrtm (dynamic voltage re-storer) and dysctm (dynamic sag corrector), which are used to protect sensitive loads. the voltage injected by the dvr is sinusoidal, produced by an h-bridge inverter which is modulated using pulse width modulation (pwm) and a sinusoidal output filter. considering that voltage sags are fast phenomena that usually last hundreds of milliseconds, this paper proposes the use of square-wave voltages to compensate sags as well as the control strategy for the compensator. experimental results show the effectiveness of the injection of a square-wave voltage for the protection of electronic loads.