Control system design and stability analysis for a three phase SiC-based Filter-less grid-connected PV inverter

Shi, Yanjun; Wang, Lu; Li, Hui

doi:10.1109/APEC.2018.8341573

Title: Control system design and stability analysis for a three phase SiC-based Filter-less grid-connected PV inverter

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Abstract

In this paper, a control system of a filter-less grid-connected SiC inverter is designed. Stability analysis has been researched with a focus on grid disturbance rejection. The analysis shows that the conventional control method with instantaneous grid voltage feedforward (IGVF) will significantly limit the bandwidth or stability margin of a filter-less grid-connected inverter, thus make the inverter sensitive to grid disturbance. Two proposed grid voltage feedforward control methods, which require little additional computation resources, are presented to suppress the grid voltage disturbance. The design methods of control parameters are derived. The effects of the proposed feedforward methods are also compared with that of conventional IGVF. Lastly, the grid-connected experimental results of a three phase SiC based filter-less PV inverter are provided to verify and compare the proposed control methods.

Authors:

Shi, Yanjun ^[1]; Wang, Lu ^[1]; Li, Hui ^[1]

Florida State Univ., Tallahassee, FL (United States). The Center for Advanced Power Systems

Publication Date:: Thu Mar 01 00:00:00 EST 2018

Research Org.:: PowerAmerica, Raleigh, NC (United States)

Sponsoring Org.:: USDOE Office of Energy Efficiency and Renewable Energy (EERE), Energy Efficiency Office. Advanced Manufacturing Office

OSTI Identifier:: 1574432

Grant/Contract Number:: EE0006521

Resource Type:: Accepted Manuscript

Journal Name:: Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition (APEC)

Additional Journal Information:: Journal Name: Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition (APEC); Journal Volume: 2018; Conference: 2018 IEEE Applied Power Electronics Conference and Exposition (APEC), San Antonio, TX (United States), 4-8 Mar 2018; Journal ID: ISSN 1048-2334

Publisher:: IEEE

Country of Publication:: United States

Language:: English

Subject:: 30 DIRECT ENERGY CONVERSION; inverter; grid-connected; silicon carbide; MOSFET; filter-less; stability

Citation Formats


                    Shi, Yanjun, Wang, Lu, and Li, Hui. Control system design and stability analysis for a three phase SiC-based Filter-less grid-connected PV inverter.  United States: N. p., 2018. 
Web.  doi:10.1109/APEC.2018.8341573.

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                    Shi, Yanjun, Wang, Lu, & Li, Hui. Control system design and stability analysis for a three phase SiC-based Filter-less grid-connected PV inverter.  United States.  https://doi.org/10.1109/APEC.2018.8341573

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                    Shi, Yanjun, Wang, Lu, and Li, Hui. Thu .  
"Control system design and stability analysis for a three phase SiC-based Filter-less grid-connected PV inverter".  United States.  https://doi.org/10.1109/APEC.2018.8341573.  https://www.osti.gov/servlets/purl/1574432.

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@article{osti_1574432,

  title        = {Control system design and stability analysis for a three phase SiC-based Filter-less grid-connected PV inverter},

  author       = {Shi, Yanjun and Wang, Lu and Li, Hui},

  abstractNote = {In this paper, a control system of a filter-less grid-connected SiC inverter is designed. Stability analysis has been researched with a focus on grid disturbance rejection. The analysis shows that the conventional control method with instantaneous grid voltage feedforward (IGVF) will significantly limit the bandwidth or stability margin of a filter-less grid-connected inverter, thus make the inverter sensitive to grid disturbance. Two proposed grid voltage feedforward control methods, which require little additional computation resources, are presented to suppress the grid voltage disturbance. The design methods of control parameters are derived. The effects of the proposed feedforward methods are also compared with that of conventional IGVF. Lastly, the grid-connected experimental results of a three phase SiC based filter-less PV inverter are provided to verify and compare the proposed control methods.},

  doi          = {10.1109/APEC.2018.8341573},

  journal      = {Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition (APEC)},

  number       = ,

  volume       = 2018,

  place        = {United States},

  year         = {Thu Mar 01 00:00:00 EST 2018},

  month        = {Thu Mar 01 00:00:00 EST 2018}

}

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