Design Consideration for High Step-Up Nonisolated Multicellular dc-dc Converter for PV Micro Converters

High step-up nonisolated multicellular dc-dc converter has been newly proposed for PV microconverters. The multicellular converter consists of the nonisolated step-up cell converters using bidirectional semiconductor switches, and these cell converters are connected in Input Parallel Output Series (IPOS). The voltage transformation ratio of the step-up converter is in case all the transistors in cell converters are operated at the duty ratio of . The proposed multicellular dc-dc converter also accomplishes high efficiency because of no magnetic coupling such as the high frequency transformer and the coupled inductor. Laboratory prototype has been fabricated to show the feasibility of the proposed converter. Design consideration for the 20 V–40 V to 384 V, 240 W nonisolated multicellular dc-dc converter has been also conducted, and the potential to achieve the efficiency of 98% has been shown. The proposed multicellular converter contributes to realizing the environmentally aware data centers for future low carbon society.

[1]  Volker Pickert,et al.  Overview of maximum power point tracking control methods for PV systems , 2014 .

[2]  Govindasamy Sundar,et al.  High Step-Up DC—DC Converter for AC Photovoltaic Module with MPPT Control , 2014 .

[3]  M. Tech.  ADVANCED HYBRID TRANSFORMER HIGH BOOST DC – DC CONVERTER FOR PHOTOVOLTAIC MODULE APPLICATIONS , 2017 .

[4]  Yan-Fei Liu,et al.  A high voltage-gain LLC micro-converter with high efficiency in wide input range for PV applications , 2014, 2014 IEEE Applied Power Electronics Conference and Exposition - APEC 2014.

[5]  K. Takao,et al.  High Power Density Design Methodology , 2007, 2007 Power Conversion Conference - Nagoya.

[6]  Robert W. Erickson,et al.  Fundamentals of Power Electronics , 2001 .

[7]  Fred C. Lee,et al.  High-efficiency high-power-density 48/1V sigma converter voltage regulator module , 2017, 2017 IEEE Applied Power Electronics Conference and Exposition (APEC).

[8]  A. Nakajima,et al.  GaN Power Transistor Modeling for High-Speed Converter Circuit Design , 2013, IEEE Transactions on Electron Devices.

[9]  Hayashi,et al.  Analysis and Prototyping of Multicellular DC-DC Transformer for Environmentally Friendly Data Centers , 2016 .

[10]  Slobodan Cuk,et al.  A general unified approach to modelling switching-converter power stages , 1976, 1970 IEEE Power Electronics Specialists Conference.

[11]  Yasuyuki Sugiyama.  Green ICT toward Low Carbon Society , 2012 .

[12]  Tadatoshi Babasaki,et al.  Developing of higher voltage direct-current power-feeding prototype system , 2009, INTELEC 2009 - 31st International Telecommunications Energy Conference.

[13]  R. Stephenson.  A and V , 1962, The British journal of ophthalmology.

[14]  Zhan Wang,et al.  High-efficiency True Bridgeless Totem Pole PFC based on GaN HEMT: Design Challenges and Cost-effective Solution , 2015 .

[15]  Cheng-Tao Tsai,et al.  PV Power-Generation System with a Phase-Shift PWM Technique for High Step-Up Voltage Applications , 2012 .

[16]  Keiichi Hirose,et al.  HVDC power distribution systems for telecom sites and data centers , 2010, The 2010 International Power Electronics Conference - ECCE ASIA -.

[17]  H. Matsuo,et al.  650 V 3.1 mΩcm2 GaN-based monolithic bidirectional switch using normally-off gate injection transistor , 2007, 2007 IEEE International Electron Devices Meeting.

[18]  Yusuke Hayashi,et al.  Highly Efficient dc–dc Transformer Based on Multicell Converter Topology for Next Generation dc Distribution System , 2017 .

[19]  Saurav Satpathy.  Photovoltaic power control using MPPT and boost converter , 2012 .

[20]  Chuang Liu,et al.  High boost ratio hybrid transformer DC-DC converter for photovoltaic module applications , 2012, 2012 Twenty-Seventh Annual IEEE Applied Power Electronics Conference and Exposition (APEC).

[21]  Jain Sachin,et al.  High gain resonant boost converter for PV micro-converter system , 2016 .