TY - JOUR
T1 - Nonisolated switching-capacitor-integrated three- port converters with seamless PWM/PFM modulation
AU - Xu, Peichao
AU - Wen, Huiqing
AU - Hao, Wanjun
AU - Yang, Yong
AU - Ma, Jieming
AU - Wang, Yiwang
AU - Zhou, Jiafeng
N1 - Publisher Copyright:
© 2021 International Solar Energy Society
PY - 2021/8
Y1 - 2021/8
N2 - Efficiency and power density of power converters for interfacing photovoltaic panels, energy storage components such as batteries, and loads in photovoltaic (PV) systems become more and more important. Compared with individual converter design for different terminals, power-integrated multiport converters shows obvious advantages in simplifying the system structure, reducing the component count, and improving the operation reliability. Originated from the high power-density switched capacitor topology, a nonisolated switching-capacitor-integrated three-port converter (SCI-TPC) is presented to achieve single-stage direct power conversion among three ports. In order to minimize the cross-regulation effect, pulse-width-modulation (PWM) and pulse-frequency-modulation (PFM) are adopted to realize the flexible power regulation and achieve power balance among three ports. Main operation modes, power flow distribution, and power transfer characteristic are analyzed. With the seamless PWM and PFM hybrid modulation, the current stress can be reduced and the overall conversion efficiency over a full operating range can be improved. Main experimental results are provided to validate the effectiveness of the proposed concept.
AB - Efficiency and power density of power converters for interfacing photovoltaic panels, energy storage components such as batteries, and loads in photovoltaic (PV) systems become more and more important. Compared with individual converter design for different terminals, power-integrated multiport converters shows obvious advantages in simplifying the system structure, reducing the component count, and improving the operation reliability. Originated from the high power-density switched capacitor topology, a nonisolated switching-capacitor-integrated three-port converter (SCI-TPC) is presented to achieve single-stage direct power conversion among three ports. In order to minimize the cross-regulation effect, pulse-width-modulation (PWM) and pulse-frequency-modulation (PFM) are adopted to realize the flexible power regulation and achieve power balance among three ports. Main operation modes, power flow distribution, and power transfer characteristic are analyzed. With the seamless PWM and PFM hybrid modulation, the current stress can be reduced and the overall conversion efficiency over a full operating range can be improved. Main experimental results are provided to validate the effectiveness of the proposed concept.
KW - PWM/PFM modulation
KW - Soft-switching
KW - Switched capacitor converter (SCC)
KW - Three-port converter (TPC)
UR - http://www.scopus.com/inward/record.url?scp=85107776265&partnerID=8YFLogxK
U2 - 10.1016/j.solener.2021.04.023
DO - 10.1016/j.solener.2021.04.023
M3 - Article
AN - SCOPUS:85107776265
SN - 0038-092X
VL - 224
SP - 160
EP - 174
JO - Solar Energy
JF - Solar Energy
ER -
