A high efficiency PV micro-inverter with grid support functions

This paper presents a new photovoltaic (PV) micro-inverter topology. The topology is based on a partial power processing resonant front end dc-dc stage, followed by an interleaved inverter stage. The input stage provides high efficiency, and flexibility of design for wide input voltage range and the...

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Bibliographic Details
Published in2014 IEEE Energy Conversion Congress and Exposition (ECCE) pp. 4244 - 4250
Main Authors Harfman-Todorovic, M., Tao, F., Agamy, M., Dong, D., Liu, X., Garces, L., Zhou, R., Delgado, E., Marabell, D., Stephens, C., Steigerwald, R.
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.09.2014
Subjects
Frequency control
Grid Support
Inductors
Inverters
Micro-inverters
Photovoltaics
Pulse width modulation
Resonant converters
Resonant frequency
Topology
Voltage control
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Summary:This paper presents a new photovoltaic (PV) micro-inverter topology. The topology is based on a partial power processing resonant front end dc-dc stage, followed by an interleaved inverter stage. The input stage provides high efficiency, and flexibility of design for wide input voltage range and the output stage provides an effective switching ripple of twice the PWM frequency, which reduces the output filter requirement. The designed micro-inverter can also provide grid Volt/VAR support functions according to commands received by the grid. Circuit topology and operation are presented as well as experimental results for the micro-inverter. The overall micro-inverter efficiency is 96%.
ISSN:2329-3721
2329-3748
DOI:10.1109/ECCE.2014.6953979