Matrix Converter-Fed ASDs A Ride-Through Module for Matrix Converters

WITH THE RAPID INCREASE OF adjustable speed drives (ASDs) in commercial and industrial facilities, the susceptibility of ASDs for power disturbances such as sags, swells, transients, and short-term power interruption has become an important issue. According to recent survey results, power interruption for 0.5 ≃ 5 s and voltage sags of 10% ≃ 40% below normal grid voltage for 3 ≃ 30 cycles are the majority of power disturbances caused to costly industry process disruption [2}. Although several studies concerning ride-through capability under power disturbances have been proposed [2], [3], [7], these studies have focused on three-phase pulsewidth modulation (PWM) rectifiers and/or PWM inverters.