Title

Phase Skipping Control To Improve Light Load Efficiency Of Three Phase Micro-Inverters

Keywords

Light load efficiency; micro-inverters; phase skipping

Abstract

Incident solar power on a PV panel is highly variable due its dependence on weather, time of the day and shading which forces the micro-inverter to operate at light loads for a significant period of its operation time. Poor light load efficiency of power converters further reduces the effective power available. This paper proposes a control technique - Phase Skipping Control, to improve light load efficiency of DC-AC stage of Grid Tied-Three Phase Micro-Inverters. This control technique is independent of the underlying topology; however, to establish its proof of concept, Phase Skipping Control, is implemented on a 400W Three Phase Half Bridge PWM Inverter. Improvement in light load efficiency with Phase Skipping Control is calculated theoretically using a proposed loss model for Half Bridge PWM Inverter. Furthermore, a prototype for 400W Three Phase Half Bridge PWM Inverter is developed for experimental verification of light load efficiency improvement using Phase Skipping Control. Experimental results shows 5.43% increase in efficiency at 10% load and 0.46% increase in CEC efficiency of the Three Phase Half Bridge PWM Inverter. © 2014 IEEE.

Publication Date

1-1-2014

Publication Title

Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC

Number of Pages

2944-2949

Document Type

Article; Proceedings Paper

Personal Identifier

scopus

DOI Link

https://doi.org/10.1109/APEC.2014.6803723

Socpus ID

84900438573 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/84900438573

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