应用于直流配电网的双向全桥直流变换器比较分析
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摘要
对电容缓冲式直流变换器采用死区时间移相控制。通过比较分析电容缓冲式直流变换器与非缓冲式直流变换器的开关特征,得出了缓冲电容对高频环节波形特征、功率传输特性以及回流功率特性的影响,并推导了可以统一描述这2种不同拓扑结构的传输功率表达式与功率因数表达式,进而得出两者之间的联系与区别。对缓冲电容的取值进行了理论分析,提出缓冲电容的选取方法。仿真与实验结果表明了理论分析的正确性与控制策略的有效性。
A phase-shift control with dead time is applied in capacitor-buffer dual-active-bridge DC/DC converter. By comparing the switching characteristic of DAB(Dual-Active-Bridge) DC/DC converter with and without buffer capacitor,the impacts of buffer capacitor on high frequency link waveform,power transmission,and circling power characteristic are obtained. Then,the transmission power and power factor expression for the two topologies are deduced,and the relation and difference between them are achieved. The value of buffer capacitor is analyzed theoretically,and the selection method of buffer capacitor is proposed. Results of simulation and prototype experiment verify the effectiveness of the proposed theory and control strategy.
A phase-shift control with dead time is applied in capacitor-buffer dual-active-bridge DC/DC converter. By comparing the switching characteristic of DAB(Dual-Active-Bridge) DC/DC converter with and without buffer capacitor,the impacts of buffer capacitor on high frequency link waveform,power transmission,and circling power characteristic are obtained. Then,the transmission power and power factor expression for the two topologies are deduced,and the relation and difference between them are achieved. The value of buffer capacitor is analyzed theoretically,and the selection method of buffer capacitor is proposed. Results of simulation and prototype experiment verify the effectiveness of the proposed theory and control strategy.
引文
[1]施婕,郑漳华,艾芊.直流微电网建模与稳定性分析[J].电力自动化设备,2010,30(2):86-90.SHI Jie,ZHENG Zhanghua,AI Qian.Modeling of DC micro and stability analysis[J].Electric Power Automation Equipment,2010,30(2):86-90.
[2]王毅,于明,张丽荣.环形直流微网短路故障分析及保护方法[J].电力自动化设备,2017,37(2):7-14.WANG Yi,YU Ming,ZHANG Lirong.Short circuit fault analysis and protection scheme for looped DC microgrid[J].Electric Power Automation Equipment,2017,37(2):7-14.
[3]宋强,赵彪,刘文华,等.智能直流配电网研究综述[J].中国电机工程学报,2013,33(25):9-20.SONG Qiang,ZHAO Biao,LIU Wenhua,et al.An overview of research on smart DC distribution power network[J].Proceedings of the CSEE,2013,33(25):9-20.
[4]周稳,戴瑜兴,毕大强,等.交直流混合微电网协同控制策略[J].电力自动化设备,2015,35(10):51-57.ZHOU Wen,DAI Yuxing,BI Daqiang,at el.Coordinative control strategy for hybrid AC-DC microgrid[J].Electric Power Automation Equipment,2015,35(10):51-57.
[5]杜翼,江道灼,尹瑞,等.直流配电网拓扑结构及控制策略[J].电力自动化设备,2015,35(1):139-145.DU Yi,JIANG Daozhuo,YIN Rui,et al.Topological structure and control strategy of DC distribution[J].Electric Power Automation Equipment,2015,35(1):139-145.
[6]李勋,龚庆武,胡元潮,等.智能配电网体系探讨[J].电力自动化设备,2011,31(8):108-111.LI Xun,GONG Qingwu,HU Yuanchao,et al.Discussion of smart distribution grid system[J].Electric Power Automation Equipment,2011,31(8):108-111.
[7]孙栩,王华伟,雷霄,等.架空线柔性直流电网的直流短路电流限制研究[J].电力自动化设备,2017,37(2):219-223.SUN Xu,WANG Weihua,LEI Xiao,et al.Restriction of DC short circuit current for overhead lines of flexible DC grid[J].Electric Power Automation Equipment,2017,37(2):219-223.
[8]彭克,张新慧,陈羽.适用于多端柔性互联的交直流配电网潮流计算方法[J].电力自动化设备,2017,37(1):22-27.PENG Ke,ZHANG Xinhui,CHEN Yu.Power flow calculation algorithm for AC-DC hybrid distribution network with multi-terminal flexible interconnection[J].Electric Power Automation Equipment,2017,37(1):22-27.
[9]江道灼,郑欢.直流配电网研究现状与展望[J].电力系统自动化,2012,36(8):98-104.JIANG Daozhuo,ZHENG Huan.Research status and developing prospect of DC distribution network[J].Automation of Electric Power Systems,2012,36(8):98-104.
[10]ENGEL S P,SOLTAU N,STAGGE H,et al.Dynamic and balanced control of three-phase high-power dual-active bridge DC-DC converter in DC-grid applications[J].IEEE Transactions on Power Electronics,2013,28(4):1880-1889.
[11]赵成勇,李路遥,翟晓萌,等.新型模块化高压大功率DC/DC变换器[J].电力系统自动化,2014,38(4):72-78.ZHAO Chengyong,LI Luyao,ZHAI Xiaomeng,et al.A new type of modular high-voltage high-power DC-DC converter[J].Automation of Electric Power Systems,2014,38(4):72-78.
[12]ZHAO B,SONG Q,LIU W,et al.Overview of dual-active-bridge isolated bidirectional DC-DC converter for high-frequency-link power conversion system[J].IEEE Transactions on Power Electronics,2014,29(8):4091-4106.
[13]赵彪,宋强,刘文华,等.用于柔性直流配电的高频链直流固态变压器[J].中国电机工程学报,2014,34(25):4295-4303.ZHAO Biao,SONG Qiang,LIU Wenhua,et al.High-frequencylink DC solid state transformers for flexible DC distribution[J].Proceedings of the CSEE,2014,34(25):4295-4303.
[14]BIELA J,SCHWEIZER M,WAFFLER S,et al.Si C versus sievaluation of potentials for performance improvement of inverter and DC-DC converter systems by Si C power semiconductors[J].IEEE Transactions on Industrial Electronics,2011,58(7):2872-2882.
[15]XIE Y,SUN J,FREUDENBERG J S.Power flow characterization of a bidirectional galvanically isolated high-power DC-DC converter over a wide operating range[J].IEEE Transactions on Power Electronics,2010,25(1):54-66.
[16]ZHAO B,SONG Q,LIU W,et al.Current-stress-optimized switching strategy of isolated bidirectional DC-DC converter with dual-phase-shift control[J].IEEE Transactions on Power Electronics,2013,60(10):4458-4467.
[17]ZHAO B,SONG Q,LIU W,et al.Dead-time effect of the high frequency isolated bidirectional full-bridge DC-DC converter:comprehensive theoretical analysis and experimental verification[J].IEEE Transactions on Power Electronics,2014,29(4):1667-1680.
[18]GERMAN,GARCíA,OLIVA A R.Modulation strategy to operate the dual active bridge DC-DC converter under soft switching in the whole operating range[J].IEEE Transactions on Power Electronics,2011,26(4):1228-1236.
[19]SHIGENORI I,HIROFUMI A.A bidirectional DC-DC converter for an energy storage system with ga lvanic isolation[J].IEEE Transactions on Power Electronics,2007,22(6):2299-2306.
[20]SIDDHARTH K,RAJAPANDIAN A.Analysis,design,and experimental results of the semidual-active-bridge converter[J].IEEE Transactions on Power Electronics,2014,29(10):5136-5147.
[21]NAAYAGI R T,FORSYTH A J,SHUTTLEWORTH R.High-power bidirectional DC-DC converter for aerospace applications[J].IEEE Transactions on Power Electronics,2012,27(11):4366-4379.
[2]王毅,于明,张丽荣.环形直流微网短路故障分析及保护方法[J].电力自动化设备,2017,37(2):7-14.WANG Yi,YU Ming,ZHANG Lirong.Short circuit fault analysis and protection scheme for looped DC microgrid[J].Electric Power Automation Equipment,2017,37(2):7-14.
[3]宋强,赵彪,刘文华,等.智能直流配电网研究综述[J].中国电机工程学报,2013,33(25):9-20.SONG Qiang,ZHAO Biao,LIU Wenhua,et al.An overview of research on smart DC distribution power network[J].Proceedings of the CSEE,2013,33(25):9-20.
[4]周稳,戴瑜兴,毕大强,等.交直流混合微电网协同控制策略[J].电力自动化设备,2015,35(10):51-57.ZHOU Wen,DAI Yuxing,BI Daqiang,at el.Coordinative control strategy for hybrid AC-DC microgrid[J].Electric Power Automation Equipment,2015,35(10):51-57.
[5]杜翼,江道灼,尹瑞,等.直流配电网拓扑结构及控制策略[J].电力自动化设备,2015,35(1):139-145.DU Yi,JIANG Daozhuo,YIN Rui,et al.Topological structure and control strategy of DC distribution[J].Electric Power Automation Equipment,2015,35(1):139-145.
[6]李勋,龚庆武,胡元潮,等.智能配电网体系探讨[J].电力自动化设备,2011,31(8):108-111.LI Xun,GONG Qingwu,HU Yuanchao,et al.Discussion of smart distribution grid system[J].Electric Power Automation Equipment,2011,31(8):108-111.
[7]孙栩,王华伟,雷霄,等.架空线柔性直流电网的直流短路电流限制研究[J].电力自动化设备,2017,37(2):219-223.SUN Xu,WANG Weihua,LEI Xiao,et al.Restriction of DC short circuit current for overhead lines of flexible DC grid[J].Electric Power Automation Equipment,2017,37(2):219-223.
[8]彭克,张新慧,陈羽.适用于多端柔性互联的交直流配电网潮流计算方法[J].电力自动化设备,2017,37(1):22-27.PENG Ke,ZHANG Xinhui,CHEN Yu.Power flow calculation algorithm for AC-DC hybrid distribution network with multi-terminal flexible interconnection[J].Electric Power Automation Equipment,2017,37(1):22-27.
[9]江道灼,郑欢.直流配电网研究现状与展望[J].电力系统自动化,2012,36(8):98-104.JIANG Daozhuo,ZHENG Huan.Research status and developing prospect of DC distribution network[J].Automation of Electric Power Systems,2012,36(8):98-104.
[10]ENGEL S P,SOLTAU N,STAGGE H,et al.Dynamic and balanced control of three-phase high-power dual-active bridge DC-DC converter in DC-grid applications[J].IEEE Transactions on Power Electronics,2013,28(4):1880-1889.
[11]赵成勇,李路遥,翟晓萌,等.新型模块化高压大功率DC/DC变换器[J].电力系统自动化,2014,38(4):72-78.ZHAO Chengyong,LI Luyao,ZHAI Xiaomeng,et al.A new type of modular high-voltage high-power DC-DC converter[J].Automation of Electric Power Systems,2014,38(4):72-78.
[12]ZHAO B,SONG Q,LIU W,et al.Overview of dual-active-bridge isolated bidirectional DC-DC converter for high-frequency-link power conversion system[J].IEEE Transactions on Power Electronics,2014,29(8):4091-4106.
[13]赵彪,宋强,刘文华,等.用于柔性直流配电的高频链直流固态变压器[J].中国电机工程学报,2014,34(25):4295-4303.ZHAO Biao,SONG Qiang,LIU Wenhua,et al.High-frequencylink DC solid state transformers for flexible DC distribution[J].Proceedings of the CSEE,2014,34(25):4295-4303.
[14]BIELA J,SCHWEIZER M,WAFFLER S,et al.Si C versus sievaluation of potentials for performance improvement of inverter and DC-DC converter systems by Si C power semiconductors[J].IEEE Transactions on Industrial Electronics,2011,58(7):2872-2882.
[15]XIE Y,SUN J,FREUDENBERG J S.Power flow characterization of a bidirectional galvanically isolated high-power DC-DC converter over a wide operating range[J].IEEE Transactions on Power Electronics,2010,25(1):54-66.
[16]ZHAO B,SONG Q,LIU W,et al.Current-stress-optimized switching strategy of isolated bidirectional DC-DC converter with dual-phase-shift control[J].IEEE Transactions on Power Electronics,2013,60(10):4458-4467.
[17]ZHAO B,SONG Q,LIU W,et al.Dead-time effect of the high frequency isolated bidirectional full-bridge DC-DC converter:comprehensive theoretical analysis and experimental verification[J].IEEE Transactions on Power Electronics,2014,29(4):1667-1680.
[18]GERMAN,GARCíA,OLIVA A R.Modulation strategy to operate the dual active bridge DC-DC converter under soft switching in the whole operating range[J].IEEE Transactions on Power Electronics,2011,26(4):1228-1236.
[19]SHIGENORI I,HIROFUMI A.A bidirectional DC-DC converter for an energy storage system with ga lvanic isolation[J].IEEE Transactions on Power Electronics,2007,22(6):2299-2306.
[20]SIDDHARTH K,RAJAPANDIAN A.Analysis,design,and experimental results of the semidual-active-bridge converter[J].IEEE Transactions on Power Electronics,2014,29(10):5136-5147.
[21]NAAYAGI R T,FORSYTH A J,SHUTTLEWORTH R.High-power bidirectional DC-DC converter for aerospace applications[J].IEEE Transactions on Power Electronics,2012,27(11):4366-4379.