TY - GEN
T1 - Parallel-connected three-phase inverters for railway auxiliary power supply without sensing output currents
AU - Wu, Dan
AU - Guo, Zhiqiang
AU - Sha, Deshang
AU - Qin, Zian
AU - Liao, Xiaozhong
PY - 2012
Y1 - 2012
N2 - This paper presents the implementation of a wireless controlled three-phase parallel-connected inverter system which supplies auxiliary power for railway facilities. In order to implement droop method without the use of output currents sensors, a power computation scheme based on the virtual output currents establishment is proposed in this paper. The overall control scheme consists of an inner loop for three-phase output-voltage regulation and an outer loop for the automatic loads sharing. For the outer loop, the Proportional-Derivative droop controller is adopted in order to deal with trade-off between the good dynamic performance and small deviation of frequency and amplitude. For the inner loop regulation, repetitive controller is employed in the system under d-q frame supplying power to nonlinear loads. The whole system is described, and the simulations as well as experimental results of a two 15kVA-parallel-connected inverters prototype are presented to demonstrate the validity of the proposed system.
AB - This paper presents the implementation of a wireless controlled three-phase parallel-connected inverter system which supplies auxiliary power for railway facilities. In order to implement droop method without the use of output currents sensors, a power computation scheme based on the virtual output currents establishment is proposed in this paper. The overall control scheme consists of an inner loop for three-phase output-voltage regulation and an outer loop for the automatic loads sharing. For the outer loop, the Proportional-Derivative droop controller is adopted in order to deal with trade-off between the good dynamic performance and small deviation of frequency and amplitude. For the inner loop regulation, repetitive controller is employed in the system under d-q frame supplying power to nonlinear loads. The whole system is described, and the simulations as well as experimental results of a two 15kVA-parallel-connected inverters prototype are presented to demonstrate the validity of the proposed system.
UR - http://www.scopus.com/inward/record.url?scp=84860126831&partnerID=8YFLogxK
U2 - 10.1109/APEC.2012.6165809
DO - 10.1109/APEC.2012.6165809
M3 - Conference contribution
AN - SCOPUS:84860126831
SN - 9781457712159
T3 - Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC
SP - 136
EP - 140
BT - APEC 2012 - 27th Annual IEEE Applied Power Electronics Conference and Exposition
T2 - 27th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2012
Y2 - 5 February 2012 through 9 February 2012
ER -