Half-Bridge Voltage Swing Inverter With Active Power Decoupling for Single-Phase PV Systems Supporting Wide Power Factor Range

Roy, Jinia; Xia, Yinglai; Ayyanar, Rajapandian

doi:10.1109/tpel.2018.2877652

Half-Bridge Voltage Swing Inverter With Active Power Decoupling for Single-Phase PV Systems Supporting Wide Power Factor Range

Journal Article · Wed Oct 24 00:00:00 EDT 2018 · IEEE Transactions on Power Electronics

DOI:https://doi.org/10.1109/tpel.2018.2877652· OSTI ID:2446679

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Arizona State University, Tempe, AZ (United States); PowerAmerica/NC State
Texas Instruments, Dallas, TX (United States)
Arizona State University, Tempe, AZ (United States)

Photovoltaic (PV) inverters form the backbone of PV generation. This paper proposes an all-film-capacitor, transformer-less single phase inverter for PV application. The topology is a combination of a front-end boost stage, a halfbridge (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 dclink thus reducing the capacitance requirement and converter volume. Being a HB derived inverter, the high frequency common mode leakage current through the PV parasitic capacitance is mitigated. Further, the dc-link average is optimally controlled to ensure a higher efficiency over wide operating load and power factor range. Furthermore, to validate its operation, a Silicon Carbide (SiC) based 1 kVA laboratory prototype is built and closed loop experimental results are provided at 100/75 kHz switching frequency over wide operating conditions.

View Accepted Manuscript (DOE)

Research Organization:: North Carolina State University, Raleigh, NC (United States)

Sponsoring Organization:: USDOE Office of Energy Efficiency and Renewable Energy (EERE)

Grant/Contract Number:: EE0006521

OSTI ID:: 2446679

Alternate ID(s):: OSTI ID: 1613356

Journal Information:: IEEE Transactions on Power Electronics, Journal Name: IEEE Transactions on Power Electronics Journal Issue: 8 Vol. 34; ISSN 0885-8993

Publisher:: IEEECopyright Statement

Country of Publication:: United States

Language:: English

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Related Subjects

42 ENGINEERING
Active power decoupling
adaptive dc-link
capacitance optimization
common mode leakage current
single phase transformer-less string inverter
wide bandgap devices

Half-Bridge Voltage Swing Inverter With Active Power Decoupling for Single-Phase PV Systems Supporting Wide Power Factor Range

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