TY - GEN
T1 - Direct Model Predictive Control of a Single-Phase Grid-Connected Siwakoti-H Inverter
AU - Begh, Mirza Abdul Waris
AU - Liegmann, Eyke
AU - Karamanakos, Petros
AU - Kennel, Ralph
N1 - Publisher Copyright:
© 2020 IEEE.
PY - 2020/10/18
Y1 - 2020/10/18
N2 - The Siwakoti-H flying-capacitor inverter (sFCI) is a recent member of the family of transformerless inverters. Due to its minimal design, it presents a favorable alternative to conventional transformerless topologies. One of the major challenges in the control of the sFCI is to maintain the flying capacitor voltage within prescribed limits. To address this issue, a direct model predictive control (MPC) scheme is proposed for a single phase grid-connected sFCI. A discrete-time switched nonlinear model of the converter is derived, which captures the dynamics of the flying capacitor and the LCL filter. The nonlinear model enables the accurate prediction of the system behavior over the whole operating range. The proposed MPC strategy is tasked to work in two different modes, i.e., grid-disconnected mode and grid-connected mode, with specific control objectives. The presented results demonstrate the flying capacitor voltage control in grid-disconnected mode, and also illustrate the steady-state and dynamic performance of the controller in grid-connected mode.
AB - The Siwakoti-H flying-capacitor inverter (sFCI) is a recent member of the family of transformerless inverters. Due to its minimal design, it presents a favorable alternative to conventional transformerless topologies. One of the major challenges in the control of the sFCI is to maintain the flying capacitor voltage within prescribed limits. To address this issue, a direct model predictive control (MPC) scheme is proposed for a single phase grid-connected sFCI. A discrete-time switched nonlinear model of the converter is derived, which captures the dynamics of the flying capacitor and the LCL filter. The nonlinear model enables the accurate prediction of the system behavior over the whole operating range. The proposed MPC strategy is tasked to work in two different modes, i.e., grid-disconnected mode and grid-connected mode, with specific control objectives. The presented results demonstrate the flying capacitor voltage control in grid-disconnected mode, and also illustrate the steady-state and dynamic performance of the controller in grid-connected mode.
UR - http://www.scopus.com/inward/record.url?scp=85097772232&partnerID=8YFLogxK
U2 - 10.1109/IECON43393.2020.9255091
DO - 10.1109/IECON43393.2020.9255091
M3 - Conference contribution
AN - SCOPUS:85097772232
T3 - IECON Proceedings (Industrial Electronics Conference)
SP - 3045
EP - 3050
BT - Proceedings - IECON 2020
PB - IEEE Computer Society
T2 - 46th Annual Conference of the IEEE Industrial Electronics Society, IECON 2020
Y2 - 19 October 2020 through 21 October 2020
ER -