ZHANG Guoju,PEI Wei,SHEN Lei,et al.Delta AC/AC Converter for Three-port Flexible Interconnection of Distribution Network[J].Automation of Electric Power Systems,2021,45(8):32-40.
ZHANG Guoju,PEI Wei,SHEN Lei,et al.Delta AC/AC Converter for Three-port Flexible Interconnection of Distribution Network[J].Automation of Electric Power Systems,2021,45(8):32-40. DOI: 10.7500/AEPS20200702004.
Delta AC/AC Converter for Three-port Flexible Interconnection of Distribution Network
A three-port delta AC/AC converter is proposed for the three-port flexible interconnection of distribution networks. Firstly
the topology of the three-port delta AC/AC converter is described. Compared with the three-port back-to-back modular multilevel converter (MMC)
the number of bridge arms in the proposed topology is reduced by half. Secondly
the working principle of the three-port delta AC/AC converter is analyzed
and its mathematical model is established
while its operation characteristics are studied by phasor diagram method. Thirdly
the control strategy is designed according to the application requirements of flexible multi-state switch (FMSS). According to the current regulation characteristics of the third bridge arm
the flexible power distribution between the two input feeders is realized based on the power demand of the output feeder. Finally
the validity of the proposed topology of the three-port delta AC/AC converter and the mathematical model
as well as the effectiveness of the control strategy
WANG Chengshan , SONG Guanyu , LI Peng , et al . Research and prospect for soft open point based flexible interconnection technology for smart distribution network [J]. Automation of Electric Power Systems , 2016 , 40 ( 22 ): 168 - 175 .
HUO Qunhai , LI Mengfei , SU Menghan , et al . Analysis on application scenarios of flexible multi-state switch [J]. Automation of Electric Power Systems , 2021 , 45 ( 8 ): 13 - 21 .
WANG Chengshan , SUN Chongbo , LI Peng , et al . FMS-based operation optimization and analysis of distribution network [J]. Automation of Electric Power Systems , 2015 , 39 ( 9 ): 82 - 87 .
PENG Yuanquan , MAI Zhiyuan , AI Wei , et al . Active and reactive power coordinated dynamic optimization for active distribution network with flexible distribution switch [J]. Automation of Electric Power Systems , 2020 , 44 ( 14 ): 54 - 61 .
ZHANG Shizhong , YANG Yanhong , PEI Wei , et al . Research and comparative analysis of different port flexible multi-state switches for regulation and control of distribution network operation [J]. High Voltage Engineering , 2019 , 45 ( 10 ): 3120 - 3129 .
OUYANG S , LIU J , YANG Y , et al . DC voltage control strategy of three-terminal medium-voltage power electronic transformer-based soft normally open points [J]. IEEE Transactions on Industrial Electronics , 2020 , 67 ( 5 ): 3684 - 3695 .
ZHU Xuhuan , TONG Ning , LIN Xiangning , et al . Flexible multi-state switch based online emergency load transferring strategy for active distribution network [J]. Automation of Electric Power Systems , 2019 , 43 ( 24 ): 87 - 95 .
ZHOU Jianqiao , ZHANG Jianwen , SHI Gang , et al . Exploration on power converter topologies applied in flexible interconnection of distribution system [J]. Proceedings of the CSEE , 2019 , 39 ( 1 ): 277 - 288 .
YANG Huan , CAI Yunyi , QU Zisen , et al . Key techniques and development trend of soft open point for distribution network [J]. Automation of Electric Power Systems , 2018 , 42 ( 7 ): 153 - 165 .
HUANG Renle , PU Tianjiao , LIU Kewen , et al . Design of hierarchy and functions of regional Energy Internet and its demonstration applications [J]. Automation of Electric Power Systems , 2015 , 39 ( 9 ): 26 - 33 .
KHAMPHAKDI P , SEKIGUCHI K , HAGIWARA M , et al . A transformerless back-to-back (BTB) system using modular multilevel cascade converters for power distribution systems [J]. IEEE Transactions on Power Electronics , 2015 , 30 ( 4 ): 1866 - 1875 .
CAI Guowei , ZHANG Hanwen , LIU Chuang , et al . Topology and control of direct AC-AC type soft open point [J]. Proceedings of the CSEE , 2020 , 40 ( 7 ): 2091 - 2101 .
NADEMI H , NORUM L E , SOGHOMONIAN Z , et al . Low frequency operation of modular multilevel matrix converter using optimization-oriented predictive control scheme [C]// IEEE 17th Workshop on Control and Modeling for Power Electronics (COMPEL) , June 27 - 30 , 2016 , Trondheim, Norway: 6p .
KARWATZKI D , BARRUSCHKA L , HOFEN M , et al . Branch energy control for the modular multilevel direct converter Hexverter [C]// IEEE Energy Conversion Congress and Exposition (ECCE) , September 14 - 18 , 2014 , Pittsburgh, USA: 1613 - 1622 .
LIU Bo , MENG Yongqing , BAI Senge , et al . A novel high-power AC/AC modular multilevel converter in Y configuration and its control strategy [J]. Proceedings of the CSEE , 2017 , 37 ( 6 ): 1764 - 1776 .
WAN Y , LIU S , JIANG J . Multivariable optimal control of a direct AC/AC converter under rotating d / q frames [J]. Journal of Power Electronics , 2013 , 13 ( 3 ): 419 - 428 .
TSURUTA R , HOSAKA T , FUJITA H . A new power flow controller using six multilevel cascaded converters for distribution systems [C]// International Power Electronics Conference , May 18 - 21 , 2014 , Hiroshima, Japan: 1350 - 1356 .
PEREDA J , GREEN T C . Direct modular multilevel converter with six branches for flexible distribution networks [J]. IEEE Transactions on Power Delivery , 2016 , 31 ( 4 ): 1728 - 1737 .
SONG H S , NAM K . Dual current control scheme for PWM converter under unbalanced input voltage conditions [J]. IEEE Transactions on Industrial Electronics , 1999 , 46 ( 5 ): 953 - 959 .