具有极低输入电流纹波的电流源型双有源桥DC-DC变换器
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摘要
针对新能源发电如光伏或者燃料电池的功率调节器电流输入纹波问题,本文提出了一种新颖的电流源型混合DAB拓扑。在稳态运行过程中输入侧开关管占空比始终为50%,在交错的作用下输入电流纹波极小。采用所提出的占空比补偿策略,可以进一步增加开关管的软开关范围。同时电压反馈采用陷波滤波器,减少了单相逆变器负载时的低频输入电流纹波。文中给出了拓扑模态分析、工作原理、ZVS条件和参数设计的原则。采用所提出的控制策略,所有功率器件都可以实现零电压(ZVS)开通,可以增加软开关的范围,同时实现高效率的功率变换。仿真结果和样机实验验证了所提出的变换器和控制策略的有效性。
In this paper, a novel current fed hybrid dual active bridge DC-DC converter is proposed, which is suitable to be used as power condition systems for fuel cell or PV with very low input current ripples.The high frequency input current ripple can be reduced to minimum because the input side switches are always switched at 50% duty cycles in spite of the fuel cell voltage and the load variation. The ZVS range can be extended with the proposed duty cycle extension. To minimize the double-line frequency as the load is single-phase inverter, a notch filter is added in the voltage feedback loop. The mode analysis, the operation principle, ZVS conditions and parameter design are given in this paper. In most working conditions, ZVS can be achieved while the input current ripple including both the high frequency and low frequency ones is low. The conversion efficiency is high. The effectiveness of the proposed converter employing the proposed control strategy is verified by simulation and experimental results of a prototype.
In this paper, a novel current fed hybrid dual active bridge DC-DC converter is proposed, which is suitable to be used as power condition systems for fuel cell or PV with very low input current ripples.The high frequency input current ripple can be reduced to minimum because the input side switches are always switched at 50% duty cycles in spite of the fuel cell voltage and the load variation. The ZVS range can be extended with the proposed duty cycle extension. To minimize the double-line frequency as the load is single-phase inverter, a notch filter is added in the voltage feedback loop. The mode analysis, the operation principle, ZVS conditions and parameter design are given in this paper. In most working conditions, ZVS can be achieved while the input current ripple including both the high frequency and low frequency ones is low. The conversion efficiency is high. The effectiveness of the proposed converter employing the proposed control strategy is verified by simulation and experimental results of a prototype.
引文
[1]Zhu G,Tan S,Chen Y,et al.Mitigation of low-frequency current ripple in fuel-cell inverter systems through waveform control[J].IEEE Transactions on Power Electronics,2013,28(2):779-792.
[2]Debenjak A,Petrovcic J,Boskoski P,et al.Fuel cell condition monitoring system based on interconnected DC-DC converter and voltage monitor[J].IEEE Transactions on Power Electronics,2015,62(8):5293-5305.
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[8]Dominic Gu J,Chen B,Zhang L,et al.Hybrid transformer ZVS/ZCS DC-DC converter with optimized magnetics and improved power devices utilization for photovoltaic module applications[J].IEEE Transactions on Power E-lectronics,2015,30(4):2127-2136.
[9]Shi Y,Li R,Xue Y,et al.Optimized operation of current-fed dual active bridge DC-DC converter for PV applications[J].IEEE Transactions on Power Electronics,2015,62(11):6986-6995.
[10]王跃,郭海平,高远(Wang Yue,Guo Haiping,Gao Yuan).双向全桥直流变换器的全功率范围软开关控制技术的研究(Research on full power range soft-switching control technology of dual active bridge DC-DC converter)[J].电工电能新技术(Advanced Technology of Electrical Engineering and Energy),2016,35(1):7-12.
[11]Kong X,Khambadkone A.Analysis and implementation of a high efficiency,interleaved current-fed full bridge converter for fuel cell system[J].IEEE Transactions on Power Electronics,2007,22(2):543-550.
[12]郭瑞,王磊,杨玉岗,等(Guo Rui,Wang Lei,Yang Yugang,et al.).一种多相交错并联磁耦合双向直流变换器效率优化策略(Research on light-load efficiency of bidirectional DC/DC converter)[J].电工电能新技术(Advanced Technology of Electrical Engineering and Energy),2016,35(9):48-54.
[13]王磊,王秋实,赵君君,等(Wang Lei,Wang Qiushi,Zhao Junjun,et al.).新能源发电系统用多相耦合交错型双向DC-DC变换器及控制研究(Research on staggered parallel magnetic DC-DC converters for new energy power generation system)[J].电工电能新技术(Advanced Technology of Electrical Engineering and Energy),2017,36(7):41-50.
[14]Choi J,Cha H,Han B M.A three-phase interleaved DC-DC converter with active clamp for fuel cells[J].IEEETransactions on Power Electronics,2010,25(8):2115-2123.
[15]Jang S,Won C,Lee B,et al.Fuel cell generation system with a new active clamping current-fed half-bridge converter[J].IEEE Transactions on Power Electronics,2007,22(2):332-340.
[16]Pan Xuewei,Rathore Akshay Kumar.Naturally clamped zero-current commutated soft-switching current-fed pushpull DC/DC converter:analysis,design,and experimental results[J].IEEE Transactions on Power Electronics,2015,30(3):1318-1327.
[17]Shi Y,Li R,Xue Y,et al.Optimized operation of current-fed dual active bridge DC-DC converter for PV applications[J].IEEE Transactions on Power Electronics,2015,62(11):6986-6995.
[18]Xiao H,Xie S.A ZVS bidirectional DC-DC converter with phase-shift plus PWM control scheme[J].IEEETransactions on Power Electronics,2008,23(2):813-823.
[19]Sha D,You F,Wang X.A high efficiency current fed semi dual active bridge DC-DC converter for low input voltage applications[J].IEEE Transactions on Power E-lectronics,2016,63(4):2155-2164.
[20]Li W,Wu H,Yu H,et al.Isolated winding-coupled bidirectional ZVS converter with PWM plus phase-shift(pps)control strategy[J].IEEE Transactions on Power Electronics,2011,26(12):3560-3570.
[21]Sha D,Zhang J,Wang X,et al.Dynamic response improvements of parallel-connected bidirectional DC-DCconverters for electrical drive powered by low-voltage battery employing optimized feedforward control[J].IEEETransactions on Power Electronics,2017,32(10):7783-7794.
[22]Sha D,Wang X,Chen D.High-efficiency current-fed dual active bridge DC-DC converter with ZVS achievement throughout full range of load using optimized switching patterns[J].IEEE Transactions on Power Electronics,2018,33(2):1347-1357.
[23]Choi J,Cha H,Han B M.A three-phase interleaved dcdc converter with active clamp for fuel cells[J].IEEETransactions on Power Electronics,2010,25(8):2115-2123.
[2]Debenjak A,Petrovcic J,Boskoski P,et al.Fuel cell condition monitoring system based on interconnected DC-DC converter and voltage monitor[J].IEEE Transactions on Power Electronics,2015,62(8):5293-5305.
[3]Kim J,Jang M,Cho B,et al.Characteristic analysis and modeling on PEMFC degradation associated with low frequency ripple current effects[A].2011 IEEE Energy Conversion Congress and Exposition(ECCE)[C].2011.3336-3342.
[4]Mazumder S K,Burra R K,Acharya K.A ripple-mitigating and energy-efficient fuel cell power-conditioning system[J].IEEE Transactions on Power Electronics,2007,22(4):1437-1452.
[5]Rathore A K.High-frequency soft-switching current-fed inverter for off-grid micro-generation:fuel cell application for rural electrification/development[A].Proceedings of the 2011 14th European Conference on Power Electronics and Applications[C].2011.1-10.
[6]Wang S,Kenarangu Y,Fahimi B.Impact of boost converter switching frequency on optimal operation of fuel cell systems[A].2006 IEEE Vehicle Power and Propulsion Conference[C].2006.1-5.
[7]Mazumder S K,Acharya K,Haynes C L.Solid-oxide-fuel-cell performance and durability:resolution of the effects of power-conditioning systems and application loads[J].IEEE Transactions on Power Electronics,2004,19(5):1263-1278.
[8]Dominic Gu J,Chen B,Zhang L,et al.Hybrid transformer ZVS/ZCS DC-DC converter with optimized magnetics and improved power devices utilization for photovoltaic module applications[J].IEEE Transactions on Power E-lectronics,2015,30(4):2127-2136.
[9]Shi Y,Li R,Xue Y,et al.Optimized operation of current-fed dual active bridge DC-DC converter for PV applications[J].IEEE Transactions on Power Electronics,2015,62(11):6986-6995.
[10]王跃,郭海平,高远(Wang Yue,Guo Haiping,Gao Yuan).双向全桥直流变换器的全功率范围软开关控制技术的研究(Research on full power range soft-switching control technology of dual active bridge DC-DC converter)[J].电工电能新技术(Advanced Technology of Electrical Engineering and Energy),2016,35(1):7-12.
[11]Kong X,Khambadkone A.Analysis and implementation of a high efficiency,interleaved current-fed full bridge converter for fuel cell system[J].IEEE Transactions on Power Electronics,2007,22(2):543-550.
[12]郭瑞,王磊,杨玉岗,等(Guo Rui,Wang Lei,Yang Yugang,et al.).一种多相交错并联磁耦合双向直流变换器效率优化策略(Research on light-load efficiency of bidirectional DC/DC converter)[J].电工电能新技术(Advanced Technology of Electrical Engineering and Energy),2016,35(9):48-54.
[13]王磊,王秋实,赵君君,等(Wang Lei,Wang Qiushi,Zhao Junjun,et al.).新能源发电系统用多相耦合交错型双向DC-DC变换器及控制研究(Research on staggered parallel magnetic DC-DC converters for new energy power generation system)[J].电工电能新技术(Advanced Technology of Electrical Engineering and Energy),2017,36(7):41-50.
[14]Choi J,Cha H,Han B M.A three-phase interleaved DC-DC converter with active clamp for fuel cells[J].IEEETransactions on Power Electronics,2010,25(8):2115-2123.
[15]Jang S,Won C,Lee B,et al.Fuel cell generation system with a new active clamping current-fed half-bridge converter[J].IEEE Transactions on Power Electronics,2007,22(2):332-340.
[16]Pan Xuewei,Rathore Akshay Kumar.Naturally clamped zero-current commutated soft-switching current-fed pushpull DC/DC converter:analysis,design,and experimental results[J].IEEE Transactions on Power Electronics,2015,30(3):1318-1327.
[17]Shi Y,Li R,Xue Y,et al.Optimized operation of current-fed dual active bridge DC-DC converter for PV applications[J].IEEE Transactions on Power Electronics,2015,62(11):6986-6995.
[18]Xiao H,Xie S.A ZVS bidirectional DC-DC converter with phase-shift plus PWM control scheme[J].IEEETransactions on Power Electronics,2008,23(2):813-823.
[19]Sha D,You F,Wang X.A high efficiency current fed semi dual active bridge DC-DC converter for low input voltage applications[J].IEEE Transactions on Power E-lectronics,2016,63(4):2155-2164.
[20]Li W,Wu H,Yu H,et al.Isolated winding-coupled bidirectional ZVS converter with PWM plus phase-shift(pps)control strategy[J].IEEE Transactions on Power Electronics,2011,26(12):3560-3570.
[21]Sha D,Zhang J,Wang X,et al.Dynamic response improvements of parallel-connected bidirectional DC-DCconverters for electrical drive powered by low-voltage battery employing optimized feedforward control[J].IEEETransactions on Power Electronics,2017,32(10):7783-7794.
[22]Sha D,Wang X,Chen D.High-efficiency current-fed dual active bridge DC-DC converter with ZVS achievement throughout full range of load using optimized switching patterns[J].IEEE Transactions on Power Electronics,2018,33(2):1347-1357.
[23]Choi J,Cha H,Han B M.A three-phase interleaved dcdc converter with active clamp for fuel cells[J].IEEETransactions on Power Electronics,2010,25(8):2115-2123.