TY - GEN
T1 - Dual sequence current controller without current sequence decomposition implemented on DSRF for unbalanced grid voltage conditions
AU - Zhou, Sizhan
AU - Liu, Jinjun
AU - Zhou, Linyuan
AU - She, Hongwei
N1 - Publisher Copyright:
© 2014 IEEE.
PY - 2014/11/11
Y1 - 2014/11/11
N2 - Dual sequence current control is the key technique for grid-connected voltage source converter to ensure the performance or fulfill grid requirement under unbalanced grid voltage conditions. In this paper, after reviewing and analyzing the existing dual sequence current controller (DSCC), a simple DSCC is proposed based on double synchronous reference frame (DSRF) without the need of current sequence decomposition. The positive-sequence current is controlled in the positive SRF with a PI controller, while the negative-sequence current is controlled in the negative SRF only with an integrator controller. To avoid the ineffectiveness of the inductor current feed-forward (ICFF) decoupling technique in DSRF, only the decoupling components in the positive SRF is performed. This ensures the same performance with the conventional current controller under normal grid voltage conditions. Further, a new decoupling technique with reference current feed-forward can be optionally employed to provide decouple effect for both positive-sequence and negative-sequence current control. Simulation results will demonstrate the validity of the proposed DSCC.
AB - Dual sequence current control is the key technique for grid-connected voltage source converter to ensure the performance or fulfill grid requirement under unbalanced grid voltage conditions. In this paper, after reviewing and analyzing the existing dual sequence current controller (DSCC), a simple DSCC is proposed based on double synchronous reference frame (DSRF) without the need of current sequence decomposition. The positive-sequence current is controlled in the positive SRF with a PI controller, while the negative-sequence current is controlled in the negative SRF only with an integrator controller. To avoid the ineffectiveness of the inductor current feed-forward (ICFF) decoupling technique in DSRF, only the decoupling components in the positive SRF is performed. This ensures the same performance with the conventional current controller under normal grid voltage conditions. Further, a new decoupling technique with reference current feed-forward can be optionally employed to provide decouple effect for both positive-sequence and negative-sequence current control. Simulation results will demonstrate the validity of the proposed DSCC.
UR - https://www.scopus.com/pages/publications/84934299149
U2 - 10.1109/ECCE.2014.6953376
DO - 10.1109/ECCE.2014.6953376
M3 - 会议稿件
AN - SCOPUS:84934299149
T3 - 2014 IEEE Energy Conversion Congress and Exposition, ECCE 2014
SP - 60
EP - 67
BT - 2014 IEEE Energy Conversion Congress and Exposition, ECCE 2014
PB - Institute of Electrical and Electronics Engineers Inc.
ER -