A robust three-phase active power-factor-correction and harmonic reductionscheme for high power

This paper proposes a robust three-phase active power-factor-correction (PF C) and harmonic reduction scheme suitable for higher power applications. Th e proposed system is a unique combination of a low-kilovoltampere 12-pulse rectifier system with a single-phase boost PFC scheme to shape the input cu rrent to near sinusoidal waveshape, The voltampere rating of the active PFC converter is 0.05 pu and is not exposed to line transients under varying l oad conditions. The proposed system is suitable for utility interface of hi gher power rectifiers employed in power supplies and adjustable-speed drive systems which demand clean input power characteristics in the range of 1-5 00 kW, The proposed system is rugged and, in the event the active control w ere to fail, the system reverts to 12-pulse operation with fifth and sevent h harmonic cancellation. Analysis and design of the system is examined in d etail, and simulation and experimental results on a 10-kVA prototype are sh own.