Correction of Power Factor by Using Static Synchronous Compensator (STATCOM)

In this paper we introduced a new control scheme which uses one PFC Boost Converter connected in shunt with a diode rectifier to recover the harmonic current drawn by the single phase diode rectifier. The line current command is derived from a dc link voltage regulator and an output power estimator. The hysteresis current controller is used to track the line current command. In absence of diode rectifier (Non-linear Load), the PFC boost converter draws purely sinusoidal current from source. In presence of diode rectifier the PFC boost converter draws current in such a way that the total current drawn from source becomes purely sinusoidal. Merits of the proposed converters include higher power density, simpler control strategy, less harmonic control contents, nearly unity power factor and unidirectional power flow