TY - JOUR
T1 - Half-Bridge Voltage Swing Inverter with Active Power Decoupling for Single-Phase PV Systems Supporting Wide Power Factor Range
AU - Roy, Jinia
AU - Xia, Yinglai
AU - Ayyanar, Raja
N1 - Funding Information:
Manuscript received June 14, 2018; revised September 5, 2018; accepted October 12, 2018. Date of publication October 23, 2018; date of current version May 22, 2019. This work was supported in part by the Office of Energy Efficiency and Renewable Energy and in part by the U.S. Department of Energy with North Carolina State University, PowerAmerica Institute, under Award DE-EE0006521. Recommended for publication by Associate Editor Y. Xing. (Corresponding author: Jinia Roy.) J. Roy was with Arizona State University, Tempe, AZ 85287 USA. She is now with the Power Systems Engineering Center, National Renewable Energy Laboratory, Golden, CO 80401 USA (e-mail:,jinia.roy@asu.edu).
Publisher Copyright:
© 1986-2012 IEEE.
PY - 2019/8
Y1 - 2019/8
N2 - Photovoltaic (PV) inverters form the backbone of PV generation. This paper proposes an all-film-capacitor, transformerless single-phase inverter for PV application. The topology is a combination of a front-end boost stage, a half-bridge (HB) inverter stage, and a buck-boost power decoupling stage. The grid ripple power is decoupled by a large swing of the HB capacitors along with a limited ripple on the dc link, thus reducing the capacitance requirement and converter volume. Being an HB-derived inverter, the high-frequency common mode leakage current through the PV parasitic capacitance is mitigated. Furthermore, the dc-link average is optimally controlled to ensure a higher efficiency over wide operating load and power factor range. To validate its operation, a Silicon Carbide based 1-kVA laboratory prototype is built and closed-loop experimental results are provided at 100/75 kHz switching frequency over wide operating conditions.
AB - Photovoltaic (PV) inverters form the backbone of PV generation. This paper proposes an all-film-capacitor, transformerless single-phase inverter for PV application. The topology is a combination of a front-end boost stage, a half-bridge (HB) inverter stage, and a buck-boost power decoupling stage. The grid ripple power is decoupled by a large swing of the HB capacitors along with a limited ripple on the dc link, thus reducing the capacitance requirement and converter volume. Being an HB-derived inverter, the high-frequency common mode leakage current through the PV parasitic capacitance is mitigated. Furthermore, the dc-link average is optimally controlled to ensure a higher efficiency over wide operating load and power factor range. To validate its operation, a Silicon Carbide based 1-kVA laboratory prototype is built and closed-loop experimental results are provided at 100/75 kHz switching frequency over wide operating conditions.
KW - Active power decoupling
KW - adaptive dc link
KW - capacitance optimization
KW - common mode leakage current
KW - single-phase transformerless string inverter
KW - wide bandgap devices
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U2 - 10.1109/TPEL.2018.2877652
DO - 10.1109/TPEL.2018.2877652
M3 - Article
AN - SCOPUS:85055722142
VL - 34
SP - 7450
EP - 7461
JO - IEEE Transactions on Power Electronics
JF - IEEE Transactions on Power Electronics
SN - 0885-8993
IS - 8
M1 - 8506447
ER -