Application of a Modified Single-Phase P-Q Theory in the Control of Shunt and Series Active Filters in a 400 Hz Microgrid

This paper presents a 400 Hz microgrid, suitable for integration of alternative energy sources in a distributed generation system. The utilization of a higher frequency can bring some advantages, such as weight and size reduction of passive components. To compensate for voltage and current harmonics, present in the microgrid bus, this paper proposes a modified p-q theory, which is suitable for application in control of single-phase active filters and unified power quality conditioners (UQPC). The UPQC can compensate for current and voltage harmonics and also for reactive power. Practical and simulated results show the ability of the proposed method to obtain the harmonic contents of voltage and current, independently of one each other