TY - GEN
T1 - Research on the parallel technique for the direct-drive wind power converter
AU - Meng, Li
AU - Yong, Wang
PY - 2011
Y1 - 2011
N2 - At present, the parallel back-to-back PWM converters which adopt the parallel mode of sharing DC bus are used in megawatt-level high-power wind generation system. However, there will be circular current when the switch states of two parallel converters are not the same and this circular current will increase system wastage and decrease system efficiency. This paper adopts a novel control strategy that adds a zero sequence circuiting current (ZSCC) control loop to the total output current loop and ameliorates PWM pulse drive method of parallel converters. This control strategy assures that the on-off times of two parallel converters are totally the same and consequently the impact of circular current will be eliminate. The simulations and experiments show that the converter can satisfy the system demands of reliability, circular current control and the hardware implementation.
AB - At present, the parallel back-to-back PWM converters which adopt the parallel mode of sharing DC bus are used in megawatt-level high-power wind generation system. However, there will be circular current when the switch states of two parallel converters are not the same and this circular current will increase system wastage and decrease system efficiency. This paper adopts a novel control strategy that adds a zero sequence circuiting current (ZSCC) control loop to the total output current loop and ameliorates PWM pulse drive method of parallel converters. This control strategy assures that the on-off times of two parallel converters are totally the same and consequently the impact of circular current will be eliminate. The simulations and experiments show that the converter can satisfy the system demands of reliability, circular current control and the hardware implementation.
UR - https://www.scopus.com/pages/publications/83355172166
U2 - 10.1109/ICEMS.2011.6073596
DO - 10.1109/ICEMS.2011.6073596
M3 - 会议稿件
AN - SCOPUS:83355172166
SN - 9781457710445
T3 - 2011 International Conference on Electrical Machines and Systems, ICEMS 2011
BT - 2011 International Conference on Electrical Machines and Systems, ICEMS 2011
T2 - 2011 International Conference on Electrical Machines and Systems, ICEMS 2011
Y2 - 20 August 2011 through 23 August 2011
ER -