TY - GEN
T1 - Input Impedance and Stability Analysis of VSC in Integrated On-Board Chargers for Electric Vehicles
AU - Faiz, Muhammad Talib
AU - Liu, Junwei
AU - Hei, Leung Ka
AU - Khan, Muhammad Mansoor
AU - Loo, K. H.
N1 - Publisher Copyright:
© 2024 IEEE.
PY - 2024/8
Y1 - 2024/8
N2 - This paper deals with a three-phase integrated on-board charger of electric vehicles (EVs) that reutilize the traction motor's stator winding as part of the input filter to form an LCL filter for the front-end voltage source converter (VSC) in dual-stage chargers. This approach imposes additional constraints on the selection of one filter inductance, based on motor specifications, which may affect the control loop stability dynamics, particularly under grid impedance variations. To examine this, the small signal model of the LCL-filtered VSC is developed and its d-q frame based impedance model is derived. The control loops, including the active damping, current, and voltage, are designed, and overall input impedance characteristics are analysed and compared with typical LCL filter based VSC. The system's stability is further assessed through generalized Nyquist criterion under grid impedance variations, and analytical findings are validated in realtime Hardware-in-the-Loop testing.
AB - This paper deals with a three-phase integrated on-board charger of electric vehicles (EVs) that reutilize the traction motor's stator winding as part of the input filter to form an LCL filter for the front-end voltage source converter (VSC) in dual-stage chargers. This approach imposes additional constraints on the selection of one filter inductance, based on motor specifications, which may affect the control loop stability dynamics, particularly under grid impedance variations. To examine this, the small signal model of the LCL-filtered VSC is developed and its d-q frame based impedance model is derived. The control loops, including the active damping, current, and voltage, are designed, and overall input impedance characteristics are analysed and compared with typical LCL filter based VSC. The system's stability is further assessed through generalized Nyquist criterion under grid impedance variations, and analytical findings are validated in realtime Hardware-in-the-Loop testing.
KW - Electric vehicles
KW - Impedance model
KW - In-tegrated on-board charger
KW - LCL filter
KW - Stability
KW - Voltage source converter
UR - http://www.scopus.com/inward/record.url?scp=85202433652&partnerID=8YFLogxK
U2 - 10.1109/COMPEL57542.2024.10614024
DO - 10.1109/COMPEL57542.2024.10614024
M3 - Conference article published in proceeding or book
AN - SCOPUS:85202433652
T3 - 2024 IEEE 25th Workshop on Control and Modeling for Power Electronics, COMPEL 2024
BT - 2024 IEEE 25th Workshop on Control and Modeling for Power Electronics, COMPEL 2024
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 25th IEEE Workshop on Control and Modeling for Power Electronics, COMPEL 2024
Y2 - 24 June 2024 through 27 June 2024
ER -