分布式控制的多模块并联电流型双向直流—直流变换器
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摘要
针对并联多模块电流型双向直流—直流变换器,为了实现功率组合的灵活性及模块化设计,提出了一种改进模式的分布式控制策略。该策略通过采样高压侧电压和低压侧电流,实现下垂控制,同时采用电压补偿技术,改善了高压侧电压调整率。搭建了二台功率各为1.5 kW的样机进行了实验验证。实验结果表明:该方法无论在静态还是动态下,可以实现模块之间良好的功率均分;同时改善了电压调整率并能实现热插拔功能。
For bidirectional DC-DC converter of multi-module shunt current-mode,an improved distributed control strategy is proposed in order to achieve the flexible power architecture and modular design.The strategy achieves droop control by sensing the high-voltage side voltage and low-voltage side current,meanwhile,and improves the voltage regulation rate on the high voltage side by adopting voltage compensation technology.Two 1.5 kW prototypes are established to verify the effectiveness of the proposed control strategy.The experimental results show that excellent power sharing is obtained under both steady state and various dynamic states.Besides,improvement of voltage regulation and hot swapping can be realized.
For bidirectional DC-DC converter of multi-module shunt current-mode,an improved distributed control strategy is proposed in order to achieve the flexible power architecture and modular design.The strategy achieves droop control by sensing the high-voltage side voltage and low-voltage side current,meanwhile,and improves the voltage regulation rate on the high voltage side by adopting voltage compensation technology.Two 1.5 kW prototypes are established to verify the effectiveness of the proposed control strategy.The experimental results show that excellent power sharing is obtained under both steady state and various dynamic states.Besides,improvement of voltage regulation and hot swapping can be realized.
引文
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[16]SHI J J,LUO J,HE X N.Common-duty-ratio control of input-series output-parallel connected phase-shift fullbridge DC-DC converter modules[J].IEEE Transactions on Power Electronics,2011,26(11):3318-3329.
[17]陈武.多变换器模块串并联组合系统研究[D].南京:南京航空航天大学,2009.CHEN Wu.Modularization structure for series-parallel connected converters[D].Nanjing:Nanjing University of Aeronautics and Astronautics,2009.
[18]TODORCEVIC T,BAUER P,FERREIRA J A,et al.Bidirectional modular multilevel DC-DC converter control and efficiency improvements through separate module control method[C]//Energy Conversion Congress and Exposition(ECCE).[S.l.]:[s.n.],2013:2038-2043.
[19]FAN H,LI H.A novel phase-shift bidirectional dc-dc converter with an extended high-efficiency range for 20 k VAsolid state transformer[C]//Energy Conversion Congress and Exposition(ECCE).[S.l.]:[s.n.],2010:3870-3876.
[20]SUN L,XU D,CHEN M,et al.Dynamic model of PWMplus phase-shift(PPS)control bidirectional DC-DC converters[C]//IAS.[S.l.]:[s.n.],2005:614-619.
[2]RAJAGOPALAN J,XING K,GUO Y,et al.Modeling and dynamic analysis of paralleled dc/dc converters with masterslave current sharing control[C]//IEEE Application Power Electronics.Conference.[S.l.]:IEEE,1996:678-684.
[3]MAZUMDER S K,Tahir M,Acharya K.Master-slave currentsharing control of a parallel DC-DC converter system over an RF communication interface[J].IEEE Transactions on industrial Electronics,2008,55(1):59-66.
[4]PANOV Y,RAJAGOPALAN J,LEE F C.Analysis and design of N paralleled DC-DC converters with master-slave current-sharing control[C]//12th Annual IEEE APEC.[S.l.]:IEEE,1997:436-442.
[5]SHI J J,ZHOU L B,HE X N.Common-duty-ratio control of input-parallel output-parallel(IPOP)connected DC-DCconverter modules with automatic sharing of currents[J].IEEE Transactions on Power Electronics,2012,27(7):3277-3291.
[6]张晓峰,吕征宇.混合动力车用全数字电流控制型双向DC/DC变换器[J].电工技术学报,2009,24(8):84-89.ZHANG Xiaofeng,LYU Zhengyu.Digital-current-controlled bi-directional DC/DC converter in the hybrid electric vehicle[J].Transactions of China Electrotechnical Society,2009,24(8):84-89.
[7]任桂周,常思勤.一种基于超级电容器组串并联切换的储能系统[J].电工技术学报,2014,29(1):187-195.REN Guizhou,CHANG Siqin.An energy storage system based on series-parallel switchover of ultra-capacitor banks[J].Transactions of China Electrotechnical Society,2014,29(1):187-195.
[8]王冕,田野,李铁民,等.应用于储能系统的双向DC-DC变换器研究[J].电工技术学报,2013,28(8):66-71.WANG Mian,TIAN Ye,LI Tiemin,et al.Study of bidirectional DC-DC converters applied to energy storage system[J].Transactions of China Electrotechnical Society,2013,28(8):66-71.
[9]FAN Haifeng,HUI Li.A distributed control of input-seriesoutput-parallel bidirectional DC-DC converter modules applied for 20 kVA solid state transformer[J].IEEE Transactions on Power Electronics,2011,26(12):939-945.
[10]INOUE Shigenori,AKAGI Hirofumi.A bidirectional isolated DC-DC converter as a core circuit of the next-generation medium-voltage power conversion system[J].IEEETransactions on Power Electronics,2007,22(2):535-542.
[11]PENGFZ,LIH,SUGJ,etal.LawleranewZVSbidirectional DC-DC converter for fuel cell and battery application[J].IEEETransactionsonPowerElectronics,2007,19(1):54-65.
[12]XIAO H F,XIE S J.A ZVS bidirectional DC-DC converter with phase-shift plus PWM control scheme[J].IEEETransactions on Power Electronics,2008,23(2):813-823.
[13]LABELLA T,LAI J S.A hybrid resonant converter utilizing a bidirectional GaN AC switch for high-efficiency PV applications[J].IEEE Transaction on Industrial Electronics,2014,50(5):3468-3475.
[14]KONDRATIEV I,SANTI E,DOUGAL R.Nonlinear synergetic control for m parallel-connected DC-DC buck converters:Droop current sharing[C]//Power Electronics Specialists Conference.[S.l.]:[s.n.],2006:1-7.
[15]袁珊珊.中小功率DC/DC模块并联均流方案的优选及实现的研究[D].杭州:浙江大学,2006.YUAN Shanshan.Current sharing scheme selection and realization research for middle and low power level paralleled DC/DC converters[D].Hangzhou:Zhejiang University,2006.
[16]SHI J J,LUO J,HE X N.Common-duty-ratio control of input-series output-parallel connected phase-shift fullbridge DC-DC converter modules[J].IEEE Transactions on Power Electronics,2011,26(11):3318-3329.
[17]陈武.多变换器模块串并联组合系统研究[D].南京:南京航空航天大学,2009.CHEN Wu.Modularization structure for series-parallel connected converters[D].Nanjing:Nanjing University of Aeronautics and Astronautics,2009.
[18]TODORCEVIC T,BAUER P,FERREIRA J A,et al.Bidirectional modular multilevel DC-DC converter control and efficiency improvements through separate module control method[C]//Energy Conversion Congress and Exposition(ECCE).[S.l.]:[s.n.],2013:2038-2043.
[19]FAN H,LI H.A novel phase-shift bidirectional dc-dc converter with an extended high-efficiency range for 20 k VAsolid state transformer[C]//Energy Conversion Congress and Exposition(ECCE).[S.l.]:[s.n.],2010:3870-3876.
[20]SUN L,XU D,CHEN M,et al.Dynamic model of PWMplus phase-shift(PPS)control bidirectional DC-DC converters[C]//IAS.[S.l.]:[s.n.],2005:614-619.