TY - GEN
T1 - Comparative evaluation of modulation strategies for a single-phase PV micro-inverter with high-frequency transformer
AU - Kinas, Jonatas Rodrigo
AU - Acevedo-Bueno, Diego A.
AU - Rodrigues, Gabriel Sales Lins
AU - Vitorino, Montie Alves
AU - Oliveira, Alexandre Cunha
AU - Lima, Antonio Marcus Nogueira
N1 - Publisher Copyright:
© 2018 IEEE.
PY - 2018/4/18
Y1 - 2018/4/18
N2 - Micro-inverter topologies have several advantages for grid-connected photovoltaic (PV) power generation systems, such as: flexible system design, simplified installation and enhanced safety characteristics. In this paper, a single-phase micro-inverter with a high-frequency transformer is introduced. The micro-inverter is composed by: an isolated high-frequency full bridge dc-dc converter, an inverter and LCL filter. Performance evaluation of the converter using three modulation strategies are analyzed by comparing harmonic distortion of injected current and semiconductor losses. The aforementioned modulation strategies (MS) are: phase-shift with unipolar PWM (MS1), phase-shift with hybrid PWM (MS2), and sinusoidal phase-shift with unfolding stage (MS3). Simulation results using PSIM corroborate the feasibility of the micro-inverter adopting different modulation strategies, being MS2 more equilibrated between semiconductor losses and injected current THD. Finally, a 250 W prototype was manufactured to validate the performance of the micro-inverter.
AB - Micro-inverter topologies have several advantages for grid-connected photovoltaic (PV) power generation systems, such as: flexible system design, simplified installation and enhanced safety characteristics. In this paper, a single-phase micro-inverter with a high-frequency transformer is introduced. The micro-inverter is composed by: an isolated high-frequency full bridge dc-dc converter, an inverter and LCL filter. Performance evaluation of the converter using three modulation strategies are analyzed by comparing harmonic distortion of injected current and semiconductor losses. The aforementioned modulation strategies (MS) are: phase-shift with unipolar PWM (MS1), phase-shift with hybrid PWM (MS2), and sinusoidal phase-shift with unfolding stage (MS3). Simulation results using PSIM corroborate the feasibility of the micro-inverter adopting different modulation strategies, being MS2 more equilibrated between semiconductor losses and injected current THD. Finally, a 250 W prototype was manufactured to validate the performance of the micro-inverter.
UR - http://www.scopus.com/inward/record.url?scp=85046945784&partnerID=8YFLogxK
U2 - 10.1109/APEC.2018.8341566
DO - 10.1109/APEC.2018.8341566
M3 - Conference contribution
AN - SCOPUS:85046945784
T3 - Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC
SP - 3238
EP - 3243
BT - APEC 2018 - 33rd Annual IEEE Applied Power Electronics Conference and Exposition
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 33rd Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2018
Y2 - 4 March 2018 through 8 March 2018
ER -
