TY - JOUR
T1 - Multi-port high voltage gain modular power converter for offshore wind farms
AU - Song, Sen
AU - Hu, Yihua
AU - Ni, Kai
AU - Yan, Joseph
AU - Chen, Guipeng
AU - Wen, Huiqing
AU - Ye, Xianming
N1 - Publisher Copyright:
© 2018 by the authors.
PY - 2018/6/26
Y1 - 2018/6/26
N2 - In high voltage direct current (HVDC) power transmission of offshore wind power systems, DC/DC converters are applied to transfer power from wind generators to HVDC terminals, and they play a crucial role in providing a high voltage gain, high efficiency, and high fault tolerance. This paper introduces an innovative multi-port DC/DC converter with multiple modules connected in a scalable matrix configuration, presenting an ultra-high voltage step-up ratio and low voltage/current rating of components simultaneously. Additionally, thanks to the adoption of active clamping current-fed push-pull (CFPP) converters as sub-modules (SMs), soft-switching is obtained for all power switches, and the currents of series-connected CFPP converters are auto-balanced, which significantly reduce switching losses and control complexity. Furthermore, owing to the expandable matrix structure, the output voltage and power of a modular converter can be controlled by those of a single SM, or by adjusting the column and row numbers of the matrix. High control flexibility improves fault tolerance. Moreover, due to the flexible control, the proposed converter can transfer power directly from multiple ports to HVDC terminals without bus cable. In this paper, the design of the proposed converter is introduced, and its functions are illustrated by simulation results.
AB - In high voltage direct current (HVDC) power transmission of offshore wind power systems, DC/DC converters are applied to transfer power from wind generators to HVDC terminals, and they play a crucial role in providing a high voltage gain, high efficiency, and high fault tolerance. This paper introduces an innovative multi-port DC/DC converter with multiple modules connected in a scalable matrix configuration, presenting an ultra-high voltage step-up ratio and low voltage/current rating of components simultaneously. Additionally, thanks to the adoption of active clamping current-fed push-pull (CFPP) converters as sub-modules (SMs), soft-switching is obtained for all power switches, and the currents of series-connected CFPP converters are auto-balanced, which significantly reduce switching losses and control complexity. Furthermore, owing to the expandable matrix structure, the output voltage and power of a modular converter can be controlled by those of a single SM, or by adjusting the column and row numbers of the matrix. High control flexibility improves fault tolerance. Moreover, due to the flexible control, the proposed converter can transfer power directly from multiple ports to HVDC terminals without bus cable. In this paper, the design of the proposed converter is introduced, and its functions are illustrated by simulation results.
KW - DC/DC converter
KW - High voltage direct current (HVDC)
KW - High voltage gain
KW - Modular
KW - Multi-port
KW - Power transmission
UR - http://www.scopus.com/inward/record.url?scp=85049204121&partnerID=8YFLogxK
U2 - 10.3390/su10072176
DO - 10.3390/su10072176
M3 - Article
AN - SCOPUS:85049204121
SN - 2071-1050
VL - 10
JO - Sustainability (Switzerland)
JF - Sustainability (Switzerland)
IS - 7
M1 - 2176
ER -