Control system design and stability analysis for a three phase SiC-based Filter-less grid-connected PV inverter
- Florida State Univ., Tallahassee, FL (United States). The Center for Advanced Power Systems
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.
- Research Organization:
- PowerAmerica, Raleigh, NC (United States)
- Sponsoring Organization:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE), Energy Efficiency Office. Advanced Manufacturing Office
- Grant/Contract Number:
- EE0006521
- OSTI ID:
- 1574432
- Journal Information:
- Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition (APEC), Vol. 2018; Conference: 2018 IEEE Applied Power Electronics Conference and Exposition (APEC), San Antonio, TX (United States), 4-8 Mar 2018; ISSN 1048-2334
- Publisher:
- IEEECopyright Statement
- Country of Publication:
- United States
- Language:
- English
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