TY - JOUR
T1 - Positive feedforward control for multimodule output-series power-conversion systems with individual nonideal sources
AU - Lin, Ray Lee
AU - Liu, Wei Shih
AU - Chen, Jiann Fuh
AU - Chen, Ming Hsu
AU - Liu, Ching Hsiung
PY - 2013/1/1
Y1 - 2013/1/1
N2 - This paper presents a positive feedforward control (PFFC) for a multimodule output-series (MMOS) system with individual nonideal sources. By adding PFFC-loop regulation into the conventional negative feedback control loop, the power module can easily harvest the maximum power from the source, and the output voltage of the converter can be slowly decreased when the input voltage is kept constant. In MMOS applications, an automatic master-loop regulation (AMLR) control is proposed to achieve voltage allocation among the individual power modules; however, this scheme has some drawbacks because its output voltage and power decrease immediately when the power of any one source is insufficient for the converter's needs. By utilizing the characteristics of the PFFC loop, the output voltage of the individual modules can be effectively allocated for managing the output power of the MMOS system. In this paper, the characteristics of the PFFC-loop regulation are derived through dc analysis. An experimental prototype is implemented for three forward modules with individual nonideal sources, and the characteristics of the PFFC loop are verified. By adding the proposed PFFC loop to AMLR, the measured power rating of the experimental MMOS system can be increased by about 20%.
AB - This paper presents a positive feedforward control (PFFC) for a multimodule output-series (MMOS) system with individual nonideal sources. By adding PFFC-loop regulation into the conventional negative feedback control loop, the power module can easily harvest the maximum power from the source, and the output voltage of the converter can be slowly decreased when the input voltage is kept constant. In MMOS applications, an automatic master-loop regulation (AMLR) control is proposed to achieve voltage allocation among the individual power modules; however, this scheme has some drawbacks because its output voltage and power decrease immediately when the power of any one source is insufficient for the converter's needs. By utilizing the characteristics of the PFFC loop, the output voltage of the individual modules can be effectively allocated for managing the output power of the MMOS system. In this paper, the characteristics of the PFFC-loop regulation are derived through dc analysis. An experimental prototype is implemented for three forward modules with individual nonideal sources, and the characteristics of the PFFC loop are verified. By adding the proposed PFFC loop to AMLR, the measured power rating of the experimental MMOS system can be increased by about 20%.
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U2 - 10.1109/TIE.2010.2084977
DO - 10.1109/TIE.2010.2084977
M3 - Article
AN - SCOPUS:84870423089
SN - 0278-0046
VL - 60
SP - 1323
EP - 1334
JO - IEEE Transactions on Industrial Electronics
JF - IEEE Transactions on Industrial Electronics
IS - 4
M1 - 5595506
ER -