应用于可再生能源系统的DAB变换器软开关调制策略
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摘要
双有源桥(DAB)直流变换器是理想的大功率双向DC/DC变换器,是电能路由器系统与储能单元实现能量双向传输的核心装置。为实现变换器软开关以达到改善开关器件工作条件和提升功率传输效率,文中分析了采用三重移相(TPS)调制的工作原理。通过分析TPS调制方法下DAB变换器的开关模式及工作波形,得到变换器实现软开关的条件,并与已有的电感电流有效值最优化控制算法结合,提出了一种全功率范围内实现全部器件软开关的调制策略。最后搭建实验平台进行验证,实验结果证明了所提出调制策略的有效性。
Dual active bridge(DAB) converter is an ideal high-power bidirectional DC/DC converter and a key equipment for bidirectional energy transmission between energy router system and energy storage units. In order to achieve the soft switching of converter and to improve the working conditions of switching device and power transmission efficiency, this paper analyzes the operation principle of triple phase shift(TPS) modulation for DAB converter. By analyzing the switching modes and opearation waveforms of DAB converter under TPS modulation method, the condition of soft switching of converter is obtained. By combining with the existing optimization control algorithm of inductor current RMS, a modulation strategy for implementing soft switching of all devices in full power range is proposed. Finally, a prototype of DAB is built, and the experimental results verify the validity of the theoretical analysis and the effectiveness of proposed modulation scheme.
Dual active bridge(DAB) converter is an ideal high-power bidirectional DC/DC converter and a key equipment for bidirectional energy transmission between energy router system and energy storage units. In order to achieve the soft switching of converter and to improve the working conditions of switching device and power transmission efficiency, this paper analyzes the operation principle of triple phase shift(TPS) modulation for DAB converter. By analyzing the switching modes and opearation waveforms of DAB converter under TPS modulation method, the condition of soft switching of converter is obtained. By combining with the existing optimization control algorithm of inductor current RMS, a modulation strategy for implementing soft switching of all devices in full power range is proposed. Finally, a prototype of DAB is built, and the experimental results verify the validity of the theoretical analysis and the effectiveness of proposed modulation scheme.
引文
[1] 李彬彬,张书鑫,程达,等.新型混合式高压直流输电DC/DC变换器[J].电力系统自动化,2018,42(7):116-122.DOI:10.7500/AEPS20171029002.LI Binbin,ZHANG Shuxin,CHENG Da,et al.Hybrid DC/DC converter for HVDC transmission system[J].Automation of Electric Power Systems,2018,42(7):116-122.DOI:10.7500/AEPS20171029002.
[2] ZHAN 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.
[3] 舒良才,陈武,王琛,等.基于混频调制的新型电力电子变压器[J].电力系统自动化,2018,42(7):146-152.DOI:10.7500/AEPS20171204006.SHU Liangcai,CHEN Wu,WANG Chen,et al.Power electronic transformer based on mixed-frequency modulation[J].Automation of Electric Power Systems,2018,42(7):146-152.DOI:10.7500/AEPS20171204006.
[4] 周路遥,姜久春.LCL谐振型双有源全桥双向DC-DC变换器分析与控制[J].电力系统自动化,2016,40(19):82-86.ZHOU Luyao,JIANG Jiuchun.Analysis and control of dual active bridge DC-DC converter based on LCL resonant network[J].Automation of Electric Power Systems,2016,40(19):82-86.
[5] 侯聂,宋文胜,武明义.全桥隔离DC/DC变换器的直接功率控制方法[J].电力系统自动化,2016,40(17):204-209.HOU Nie,SONG Wensheng,WU Mingyi.Direct power control scheme of full-bridge isolated DC/DC converters[J].Automation of Electric Power Systems,2016,40(17):204-209.
[6] KRISMER F,KOLAR J W.Accurate small-signal model for the digital control of an automotive bidirectional dual active bridge[J].IEEE Transactions on Power Electronics,2009,24(12):2756-2768.
[7] BAI H,NIE Z L,MI C C.Experimental comparison of traditional phase-shift,dual-phase-shift,and model-based control of isolated bidirectional DC-DC converters[J].IEEE Transactions on Power Electronics,2010,25(6):1444-1449.
[8] ZHAO B,SONG Q,LIU W.Power characterization of isolated bidirectional dual-active-bridge DC-DC converter with dual-phase-shift control[J].IEEE Transactions on Power Electronics,2012,27(9):4172-4176.
[9] ZHAO B,YU Q G,SUN W X.Extended-phase-shift control of isolated bidirectional DC-DC converter for power distribution in microgrid[J].IEEE Transactions on Power Electronics,2012,27(11):4667-4680.
[10] KRISMER F,KOLAR J W.Closed form solution for minimum conduction loss modulation of DAB converters[J].IEEE Transactions on Power Electronics,2012,27(1):174-188.
[11] TONG A P,HANG L J,LI G J,et al.Power flow and inductor current analysis of PWM control for dual active bridge converter[C]// 2016 IEEE 8th Power Electronics and Motion Control Conference,May 22-26,2016,Hefei,China.
[12] JAIN A K,AYYANAR R.PWM control of dual active bridge:comprehensive analysis and experimental verification[J].IEEE Transactions on Power Electronics,2011,26(4):1215-1227.
[13] 宋文胜,侯聂,武明义,等.双向全桥隔离DC/DC变换器最小峰值电流及其虚拟功率控制方法[J].中国电机工程学报,2016,36(18):4990-4998.SONG Wensheng,HOU Nie,WU Mingyi,et al.A current stress minimization strategy of dual-active-bridge DC/DC converters with virtual power control method[J].Proceedings of the CSEE,2016,36(18):4990-4998.
[14] 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 Industrial Electronics,2013,60(10):4458-4467.
[15] HOU N,SONG W,WU M.Minimum-current-stress scheme of dual active bridge DC-DC converter with unified phase-shift control[J].IEEE Transactions on Power Electronics,2016,31(12):8552-8561.
[16] 侯旭,曾正,冉立,等.基于扩展移相控制的双向有源桥变换器回流功率优化[J].中国电机工程学报,2018,38(23):7004-7014.HOU Xu,ZENG Zheng,RAN Li,et al.Backflow power optimization of dual active bridge converter based on extended-phase-shift control[J].Proceedings of the CSEE,2018,38(23):7004-7014.
[17] 侯聂,宋文胜,王顺亮.全桥隔离DC/DC变换器相移控制归一化及其最小回流功率控制[J].中国电机工程学报,2016,36(2):499-506.HOU Nie,SONG Wensheng,WANG Shunliang.Normalization of phase shift control and minimum reflux power control of full-bridge isolated DC/DC converters[J].Proceedings of the CSEE,2016,36(2):499-506.
[18] TONG A,HANG L,LI G,et al.Modeling and analysis of a dual-active-bridge-isolated bidirectional DC/DC converter to minimize RMS current with whole operating range[J].IEEE Transactions on Power Electronics,2018,33(6):5302-5316.
[19] OGGIER G,GARCIA O,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.
[20] EVERTS J,KRISMER F,KEYBUS J,et al.Optimal ZVS modulation of single-phase single-stage bidirectional DAB AC/DC converters[J].IEEE Transactions on Power Electronics,2014,29(8):3954-3970.
[21] 童安平,杭丽君,李国杰.三重移相控制下DAB变换器全局优化控制策略及分析[J].中国电机工程学报,2017,37(20):6037-6049.TONG Anping,HANG Lijun,LI Guojie.Global optimized control strategy of dual active bridge converter controlled by triple-phase-shift modulation scheme and its analysis[J].Proceedings of the CSEE,2017,37(20):6037-6049.
[2] ZHAN 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.
[3] 舒良才,陈武,王琛,等.基于混频调制的新型电力电子变压器[J].电力系统自动化,2018,42(7):146-152.DOI:10.7500/AEPS20171204006.SHU Liangcai,CHEN Wu,WANG Chen,et al.Power electronic transformer based on mixed-frequency modulation[J].Automation of Electric Power Systems,2018,42(7):146-152.DOI:10.7500/AEPS20171204006.
[4] 周路遥,姜久春.LCL谐振型双有源全桥双向DC-DC变换器分析与控制[J].电力系统自动化,2016,40(19):82-86.ZHOU Luyao,JIANG Jiuchun.Analysis and control of dual active bridge DC-DC converter based on LCL resonant network[J].Automation of Electric Power Systems,2016,40(19):82-86.
[5] 侯聂,宋文胜,武明义.全桥隔离DC/DC变换器的直接功率控制方法[J].电力系统自动化,2016,40(17):204-209.HOU Nie,SONG Wensheng,WU Mingyi.Direct power control scheme of full-bridge isolated DC/DC converters[J].Automation of Electric Power Systems,2016,40(17):204-209.
[6] KRISMER F,KOLAR J W.Accurate small-signal model for the digital control of an automotive bidirectional dual active bridge[J].IEEE Transactions on Power Electronics,2009,24(12):2756-2768.
[7] BAI H,NIE Z L,MI C C.Experimental comparison of traditional phase-shift,dual-phase-shift,and model-based control of isolated bidirectional DC-DC converters[J].IEEE Transactions on Power Electronics,2010,25(6):1444-1449.
[8] ZHAO B,SONG Q,LIU W.Power characterization of isolated bidirectional dual-active-bridge DC-DC converter with dual-phase-shift control[J].IEEE Transactions on Power Electronics,2012,27(9):4172-4176.
[9] ZHAO B,YU Q G,SUN W X.Extended-phase-shift control of isolated bidirectional DC-DC converter for power distribution in microgrid[J].IEEE Transactions on Power Electronics,2012,27(11):4667-4680.
[10] KRISMER F,KOLAR J W.Closed form solution for minimum conduction loss modulation of DAB converters[J].IEEE Transactions on Power Electronics,2012,27(1):174-188.
[11] TONG A P,HANG L J,LI G J,et al.Power flow and inductor current analysis of PWM control for dual active bridge converter[C]// 2016 IEEE 8th Power Electronics and Motion Control Conference,May 22-26,2016,Hefei,China.
[12] JAIN A K,AYYANAR R.PWM control of dual active bridge:comprehensive analysis and experimental verification[J].IEEE Transactions on Power Electronics,2011,26(4):1215-1227.
[13] 宋文胜,侯聂,武明义,等.双向全桥隔离DC/DC变换器最小峰值电流及其虚拟功率控制方法[J].中国电机工程学报,2016,36(18):4990-4998.SONG Wensheng,HOU Nie,WU Mingyi,et al.A current stress minimization strategy of dual-active-bridge DC/DC converters with virtual power control method[J].Proceedings of the CSEE,2016,36(18):4990-4998.
[14] 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 Industrial Electronics,2013,60(10):4458-4467.
[15] HOU N,SONG W,WU M.Minimum-current-stress scheme of dual active bridge DC-DC converter with unified phase-shift control[J].IEEE Transactions on Power Electronics,2016,31(12):8552-8561.
[16] 侯旭,曾正,冉立,等.基于扩展移相控制的双向有源桥变换器回流功率优化[J].中国电机工程学报,2018,38(23):7004-7014.HOU Xu,ZENG Zheng,RAN Li,et al.Backflow power optimization of dual active bridge converter based on extended-phase-shift control[J].Proceedings of the CSEE,2018,38(23):7004-7014.
[17] 侯聂,宋文胜,王顺亮.全桥隔离DC/DC变换器相移控制归一化及其最小回流功率控制[J].中国电机工程学报,2016,36(2):499-506.HOU Nie,SONG Wensheng,WANG Shunliang.Normalization of phase shift control and minimum reflux power control of full-bridge isolated DC/DC converters[J].Proceedings of the CSEE,2016,36(2):499-506.
[18] TONG A,HANG L,LI G,et al.Modeling and analysis of a dual-active-bridge-isolated bidirectional DC/DC converter to minimize RMS current with whole operating range[J].IEEE Transactions on Power Electronics,2018,33(6):5302-5316.
[19] OGGIER G,GARCIA O,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.
[20] EVERTS J,KRISMER F,KEYBUS J,et al.Optimal ZVS modulation of single-phase single-stage bidirectional DAB AC/DC converters[J].IEEE Transactions on Power Electronics,2014,29(8):3954-3970.
[21] 童安平,杭丽君,李国杰.三重移相控制下DAB变换器全局优化控制策略及分析[J].中国电机工程学报,2017,37(20):6037-6049.TONG Anping,HANG Lijun,LI Guojie.Global optimized control strategy of dual active bridge converter controlled by triple-phase-shift modulation scheme and its analysis[J].Proceedings of the CSEE,2017,37(20):6037-6049.