A fast series compensator for voltage sag correction

This paper shows a fast active and reactive power series compensator applied to voltage sag correction. This disturbance is common in longer distribution lines, such as rural electrical systems, or in transmission ones. To analyse the voltage sag, this study is centralized in a low voltage effect during an induction motor start-up fed through a weak line. The control methodology is based on active and reactive power compensation in the line. A PWM voltage converter is used for the voltage sag correction. The simulated results confirm the excellent performance for the studied case.