Novel PFC converter suitable for engine-driven generator-interactive three-phase power systems

In recent years, discontinuous current mode control implementation for three-phase AC-DC converters with active power filtering and power factor correction schemes has attracted special interest in industrial and telecommunication energy systems. This control strategy has practical advantages since it has a simple and cost-effective configuration. However, for emergency engine-driven generators, most three-phase PFC converters with discontinuous current mode control have not been effectively adopted in practice because the conventional PFC circuit configuration has some disadvantages for engine-driven generators connected to three-phase AC mains. A new conceptual PFC converter circuit and system configuration operating with discontinuous current mode control and suitable for engine-driven generators connected to threephase AC mains is proposed. The operating principle and unique features of the proposed PFC converter is discussed in terms of harmonic currents and PFC converter performance evaluations on the basis of simulation results from two types of conventional three-phase PFC converters.