TY - GEN
T1 - A Cascaded Extended State Observer for Three-level Back-to-back Converter with Surface Mounted Permanent Magnet Synchronous Motor
AU - Lin, Guiying
AU - Wang, Fengxiang
AU - He, Yingjie
AU - Rodriguez, Jose
PY - 2019/8
Y1 - 2019/8
N2 - For better DC-link voltage response in three-level neutral point clamped (NPC) back-to-back converter, a cascaded extended state observer (CESO) is proposed in this paper. DC-link is the connection between active front ends (AFEs) and machines, whose stability is critical to both sides. However, the desired performance cannot be guaranteed when many disturbances occurred. Aiming to improve its response under disturbance, two extended state observers (ESOs) which estimate power and torque disturbance for the AFE and surface mounted permanent magnet synchronous motor (SPMSM), respectively, are realized in NPC back-to-back converter with model predictive control (MPC). Due to the cascaded structure of the back-to-back converter, power estimation in a conventional way takes a long time to converge. Thus, a CESO is proposed by introducing the torque reference to estimate power disturbance more quickly. With proper design of feedforward compensation, faster dynamic response is obtained, also, DC-link voltage barely changes when the working point of the SPMSM moves. The performance in both steady and transient states of the proposed scheme is verified by simulation results.
AB - For better DC-link voltage response in three-level neutral point clamped (NPC) back-to-back converter, a cascaded extended state observer (CESO) is proposed in this paper. DC-link is the connection between active front ends (AFEs) and machines, whose stability is critical to both sides. However, the desired performance cannot be guaranteed when many disturbances occurred. Aiming to improve its response under disturbance, two extended state observers (ESOs) which estimate power and torque disturbance for the AFE and surface mounted permanent magnet synchronous motor (SPMSM), respectively, are realized in NPC back-to-back converter with model predictive control (MPC). Due to the cascaded structure of the back-to-back converter, power estimation in a conventional way takes a long time to converge. Thus, a CESO is proposed by introducing the torque reference to estimate power disturbance more quickly. With proper design of feedforward compensation, faster dynamic response is obtained, also, DC-link voltage barely changes when the working point of the SPMSM moves. The performance in both steady and transient states of the proposed scheme is verified by simulation results.
KW - active front end
KW - Cascaded extended state observer
KW - model predictive control
KW - surface mounted permanent magnet synchronous motor
KW - three-level back-to-back converter
UR - http://www.scopus.com/inward/record.url?scp=85077109692&partnerID=8YFLogxK
U2 - 10.1109/ICEMS.2019.8922123
DO - 10.1109/ICEMS.2019.8922123
M3 - Conference contribution
T3 - 2019 22nd International Conference on Electrical Machines and Systems, ICEMS 2019
BT - 2019 22nd International Conference on Electrical Machines and Systems, ICEMS 2019
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 22nd International Conference on Electrical Machines and Systems, ICEMS 2019
Y2 - 11 August 2019 through 14 August 2019
ER -