Performance analysis of UPQC with heterogeneous control during load power factor variation (pages 937–960)

摘要

This paper deals with the analysis of a unified power quality conditioner (UPQC) with a new heterogeneousncontrol applied to its active power filters (APF). This control, when applied to the APFs of UPQC, relievesncompletely the reactive power burden of the source and makes the input power factor unity. The proposedncontrol, termed as heterogeneous control, utilizes sinusoidal pulse width modulation (SPWM) for seriesnAPF (SAPF) and hysteresis PWM for parallel APF (PAPF). No transformation is used in this control forngenerating the reference quantities for both voltage and current. The performance of UPQC with thenproposed control is compared with other transformation less homogeneous control schemes which includenhysteresis and SPWM for both APFs. The heterogeneous control performance is found superior in terms ofncomplete reactive power support from the PAPF with reduced APF ratings. PSCAD/EMTDC simulationnresults are presented to show the effectiveness of the proposed control. Copyright © 2011 John Wiley &nSons, Ltd.