Abshocl-Many industrial plants rcly on Adjustable Speed Driver (ASD) for critical process applications. However, most ASD are susceptible to power disturbances, specially voltage sags and momentary interruptions. ASD tripping in industrial process can he very costly due to defective units produced BP well as production down time.This paper presents an Ultracapaeitor-Based Ride-Through System for Adjustable Speed Drives Applied to critical Process. The complete system is composed by an Unificld Power Qualyti Conditioner (UPQC) and a two-quadrant Chopper.
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