Klemens Heumann

TL;DR: In this paper, a three-phase four-wire shunt active power filter using a conventional three-leg converter without the need of power supply at DC bus has been described.

Abstract: The power circuit of a general active power line conditioner (APLC) is based on series and shunt power converters that share a single DC link. In the present paper, a generic control concept for these series and shunt converters is proposed. It is based on the instantaneous real and imaginary power theory. In fact, the resulting equipment deals with the custom power and FACTS concepts. This equipment incorporates not only the compensation functions at the fundamental frequency like a unified power flow controller (UPFC), but also provides active harmonic mitigation capabilities. For these reasons, the compensator proposed here is called the universal active power line conditioner (UPLC). Simulation and experimental results are presented to confirm that the new approach has better performance than those obtained by controllers based on traditional concepts of active and reactive power.

TL;DR: In this paper, a combined system of a passive filter, using only one LC filter tuned to the lowest typical line current harmonic, and a shunt active power filter, sharing the filter capacitor to be decoupled from the fundamental line voltage, is proposed.

TL;DR: In this article, a combined series and shunt 3-phase 4-wire active power filter with two conventional 3-leg converters is proposed to compensate simultaneously the load current and the supply voltage such that the source current and voltage at load terminals become sinusoidal and in phase.

TL;DR: In this paper, a three-phase four-wire shunt active power filter using a conventional three-leg converter is presented, which needs no power supply at the d.c.-bus and the a.c.neutral wire is directly connected to...