TY - GEN
T1 - The influence of internal current loop on transient response performance of I-V droop controlled paralleled DC-DC converters
AU - Wang, Haojie
AU - Han, Minxiao
AU - Guerrero, Josep M.
AU - Quintero, Juan Carlos Vasquez
AU - Han, Renke
PY - 2017/10
Y1 - 2017/10
N2 - The external droop control loop of I-V droop control is designed as a voltage loop with embedded virtual impedance, so the internal current loop plays a major role in the system bandwidth. Thus, in this paper, the influence of internal current loop on transient response performance of I-V droop controlled paralleled dc-dc converters is analyzed, which is guided and significant for its industry application. The model which is used for dynamic analysis is built, and the root locus method is used based on the model to analyze the dynamic response of the system by shifting different control parameters. Analysis results show that any converter's inner current loop can influence all converters' dynamic responses in the system and the one with larger Virtual Resistance (VR) has greater effect. Increasing the proportional terms can decrease the fluctuations of current and voltage, and key parts of errors can be reduced more rapidly during dynamical process, but adverse effect on completely eliminating errors can be caused; increasing integral terms can enlarge current fluctuations during dynamical process, but the errors can be eliminated more rapidly. The experiments are performed to verify the analysis.
AB - The external droop control loop of I-V droop control is designed as a voltage loop with embedded virtual impedance, so the internal current loop plays a major role in the system bandwidth. Thus, in this paper, the influence of internal current loop on transient response performance of I-V droop controlled paralleled dc-dc converters is analyzed, which is guided and significant for its industry application. The model which is used for dynamic analysis is built, and the root locus method is used based on the model to analyze the dynamic response of the system by shifting different control parameters. Analysis results show that any converter's inner current loop can influence all converters' dynamic responses in the system and the one with larger Virtual Resistance (VR) has greater effect. Increasing the proportional terms can decrease the fluctuations of current and voltage, and key parts of errors can be reduced more rapidly during dynamical process, but adverse effect on completely eliminating errors can be caused; increasing integral terms can enlarge current fluctuations during dynamical process, but the errors can be eliminated more rapidly. The experiments are performed to verify the analysis.
KW - Paralleled dc-dc converters
KW - I-V droop control
KW - Transient response performance
KW - Internal current loop
U2 - 10.1109/IECON.2017.8216860
DO - 10.1109/IECON.2017.8216860
M3 - Article in proceeding
T3 - Proceedings of the Annual Conference of the IEEE Industrial Electronics Society
SP - 4982
EP - 4987
BT - Proceedings of 43rd Annual Conference of the IEEE Industrial Electronics Society, IECON 2017
PB - IEEE Press
T2 - 43rd Annual Conference of the IEEE Industrial Electronics Society, IECON 2017
Y2 - 29 October 2017 through 1 November 2017
ER -