TY - JOUR
T1 - A 3-kW Two-Stage Transformerless PV Inverter with Resonant DC Link and ZVS-PWM Operation
AU - Chen, Yenan
AU - Chen, Minjie
AU - Xu, Dehong
N1 - Funding Information:
Manuscript received May 2, 2020; revised July 20, 2020 and November 10, 2020; accepted November 29, 2020. Date of publication December 9, 2020; date of current version March 17, 2021. Paper 2020-IPCC-0787.R2, presented at the 2018 IEEE Applied Power Electronics Conference and Exposition, San Antonio, TX, USA, Mar. 4–8, and approved for publication in the IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS by the Industrial Power Converter Committee of the IEEE Industry Applications Society. This work was supported by the National Science Foundation of China under Grant 51337009. (Corresponding author: Dehong Xu.) Yenan Chen and Minjie Chen are with the Department of Electrical Engineering and the Andlinger Center for Energy and Environment, Princeton University, Princeton, NJ 08540 USA (e-mail: yenanc@princeton.edu; minjie@princeton.edu).
Publisher Copyright:
© 1972-2012 IEEE.
PY - 2021/3/1
Y1 - 2021/3/1
N2 - Photovoltaic (PV) inverters play important roles in renewable energy integration. Reducing the switching loss is a main challenge in improving the efficiency and power density. This article presents the design, implementation, and field test of a 3-kW two-stage commercial-ready transformerless PV inverter with resonant dc link and zero-voltage-switching pulsewidth modulation (ZVS-PWM) operation. The ZVS-PWM operation periodically resonates the dc-link voltage of the inverter to zero for ZVS of the inverter switches, which enables higher switching frequency and significantly reduced magnetic component size. A 30-kW distributed PV system comprising ten ZVS-PWM PV inverters was built and tested for more than 100 days to evaluate the long-term performance of the PV inverter. The key figure-of-merits for grid-interface operation, such as efficiency, power density, total harmonic distortion, and leakage current, are measured, analyzed, and reported.
AB - Photovoltaic (PV) inverters play important roles in renewable energy integration. Reducing the switching loss is a main challenge in improving the efficiency and power density. This article presents the design, implementation, and field test of a 3-kW two-stage commercial-ready transformerless PV inverter with resonant dc link and zero-voltage-switching pulsewidth modulation (ZVS-PWM) operation. The ZVS-PWM operation periodically resonates the dc-link voltage of the inverter to zero for ZVS of the inverter switches, which enables higher switching frequency and significantly reduced magnetic component size. A 30-kW distributed PV system comprising ten ZVS-PWM PV inverters was built and tested for more than 100 days to evaluate the long-term performance of the PV inverter. The key figure-of-merits for grid-interface operation, such as efficiency, power density, total harmonic distortion, and leakage current, are measured, analyzed, and reported.
KW - Inverter
KW - photovoltaic (PV)
KW - renewable energy
KW - resonant dc link
KW - zero voltage switching (ZVS)
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U2 - 10.1109/TIA.2020.3043218
DO - 10.1109/TIA.2020.3043218
M3 - Article
AN - SCOPUS:85097946336
SN - 0093-9994
VL - 57
SP - 1495
EP - 1506
JO - IEEE Transactions on Applications and Industry
JF - IEEE Transactions on Applications and Industry
IS - 2
M1 - 9289017
ER -