DESIGN OF LOW-VOLTAGE DYNAMIC
REACTIVE POWER COMPENSATION DEVICE
Abstract : Thyristor switching capacitor(TSC) is a new application in the field of static compensation(SUC) technology.Based on the engineering design experience. The present status of reactive power compensation technique in electric power industry is reviewed . Reactive power and harmonic will decrease power network quality and compensators with contact switch have some drawback , one new thyristor switching capacitor equipment for reactive power compensation are introduced ,the 80196KB single-chip microcomputer is adopted as the core of the controller . Based on the reactive compensation theorem , an optimal control method for automatic capacitor compensation is set up . The thyristors are applied for the fast automatic contactless switching of capacitor sets . It detects the voltage across the SCR and takes zero voltage as its necessary condition of triggering . The hardware locking protection avoids the over compensation and the component damage by rush current from improper triggering .