双重移相控制的双主动全桥变换器全局电流应力分析及优化控制策略
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摘要
为了减小双主动全桥(DAB)变换器的功率损耗,考虑全局范围内不同传输功率及输入输出电压调节比,提出一种双重移相电流应力优化控制策略,通过分段优化两侧全桥内移相角和桥间外移相角,保证变换器全局范围内电流应力最优。首先对比分析传统单移相、扩展移相和双重移相传输功率特性,得出双重移相功率传输范围及灵活性优势明显,进一步建立双重移相控制所有运行模态的电感电流应力与电压调节比、传输功率及移相角之间的数学关系。在此基础上,推导得出所有模态下变换器工作在最优电流应力状态的移相角条件,并研究优化控制策略的实现方案。搭建5kW实验样机,进行全功率范围内应力与效率对比实验,实验结果验证了所提控制策略的可行性和优越性。
To minimize the power loss of the dual-active full bridge(DAB) converter, based on the different transmission power and input/output voltage conversion ratio in global range, a dual-phase-shift(DPS) current stress optimal control strategy is proposed. By means of segmentation optimization of the inner/outer phase-shift angle in two sides of full bridge, this strategy ensures the optimal current stress in the global range of converter. Firstly, the traditional single-phase-shift(SPS),extended-phase-shift(EPS) and dual-phase-shift transmission power characteristics are compared and analyzed, which shows the significant advantage of DPS in transmission range and flexibility.Furthermore, the mathematical relationship among the inductance current stress, voltage conversion ratio, transmission power and phase-shift angle in all modes is established. On this basis, the phase-shift angle conditions, which are all mode converter processing in the optimal current stress state and the realization scheme of the optimal control strategy, are obtained. A 5 kW experimental prototype is set up, and the contrast experiments of the stress and efficiency are carried out in full power range.The feasibility and significant advantage of the proposed control strategy are verified.
To minimize the power loss of the dual-active full bridge(DAB) converter, based on the different transmission power and input/output voltage conversion ratio in global range, a dual-phase-shift(DPS) current stress optimal control strategy is proposed. By means of segmentation optimization of the inner/outer phase-shift angle in two sides of full bridge, this strategy ensures the optimal current stress in the global range of converter. Firstly, the traditional single-phase-shift(SPS),extended-phase-shift(EPS) and dual-phase-shift transmission power characteristics are compared and analyzed, which shows the significant advantage of DPS in transmission range and flexibility.Furthermore, the mathematical relationship among the inductance current stress, voltage conversion ratio, transmission power and phase-shift angle in all modes is established. On this basis, the phase-shift angle conditions, which are all mode converter processing in the optimal current stress state and the realization scheme of the optimal control strategy, are obtained. A 5 kW experimental prototype is set up, and the contrast experiments of the stress and efficiency are carried out in full power range.The feasibility and significant advantage of the proposed control strategy are verified.
引文
[1]童亦斌,吴峂,金新民,等.双向DC/DC变换器的拓扑研究[J].中国电机工程学报,2007,27(13):81-86.Tong Yibin,Wu Tong,Jin Xinmin,et al.Study of bi-directional DC/DC converter[J].Proceedings of the CSEE,2007,27(13):81-86.
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[7]Wen Huiqing,Su Bin.Reactive power and softswitching capability analysis of dual-active-bridge DC-DC converters with dual-phase-shift control[J].Journal of Power Electronics,2015,15(1):18-30.
[8]Zhao Biao,Yu Qingguang,Sun Weixin.Extendedphase-shift control of isolated bidirectional DC-DCconverter for power distribution in microgrid[J].IEEE Transactions on Power Electronics,2012,27(11):4667-4680.
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[10]程红,高巧梅,朱锦标,等.基于双重移相控制的双向全桥DC-DC变换器动态建模与最小回流功率控制[J].电工技术学报,2014,29(3):245-253.Cheng Hong,Gao Qiaomei,Zhu Jinbiao,et al.Dynamic modeling and minimum backflow power controlling of the bi-directional full-bridge DC-DCconverters based on dual-phase-shifting control[J].Transactions of China Electrotechnical Society,2014,29(3):245-253.
[11]张勋,王广柱,商秀娟,等.双向全桥DC-DC变换器回流功率优化的双重移相控制[J].中国电机工程学报,2016,36(4):1090-1097.Zhang Xun,Wang Guangzhu,Shang Xiujuan,et al.An optimized strategy based on backflow power of bi-directional dual-active-bridge DC-DC converters with dual-phase-shifting control[J].Proceedings of the CSEE,2016,36(4):1090-1097.
[12]于德,付超,王毅,等.隔离型双向直流变换器的最小回流功率移相控制方法[J].电工技术学报,2017,32(24):126-138.Yu De,Fu Chao,Wang Yi,et al.The phase-shifted control method of isolated bidirectional DC-DCconverter with minimum backflow power[J].Transactions of China Electrotechnical Society,2017,32(24):126-138.
[13]王聪,沙广林,王俊,等.基于双重移相控制的双有源桥DC-DC变换器的软开关[J].电工技术学报,2015,30(12):106-113.Wang Cong,Sha Guanglin,Wang Jun,et al.The analysis of zero voltage switching dual active bridge DC-DC converters based on dual-phase-shifting control[J].Transactions of China Electrotechnical Society,2015,30(12):106-113.
[14]Liu Xu,Zhu Z Q,Stone D A,et al.Novel dualphase-shift control with bidirectional inner phase shifts for a dual-active-bridge converter having low surge current and stable power control[J].IEEETransactions on Power Electronics,2017,32(5):4095-4106.
[15]Zhao Biao,Song Qiang,Liu Wenhua,et al.Currentstress-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.
[16]Li Jingxin,Wang Dongzhi,Wang Wei,et al.Minimize current stress of dual-active-bridge DC-DCconverters for electric vehicles based on lagrange multipliers method[J].Energy Procedia,2017,105:2733-2738.
[17]张勋,王广柱,王婷.双向全桥DC-DC变换器基于电感电流应力的双重移相优化控制[J].电工技术学报,2016,31(22):100-106.Zhang Xun,Wang Guangzhu,Wang Ting.Optimized control based on current-stress of bi-directional full-bridge DC-DC converters with dual-phaseshifting control[J].Transactions of China Electrotechnical Society,2016,31(22):100-106.
[18]王玉斌,王杉杉,封波,等.基于双重移相控制的双有源DC-DC变换器的最优电流控制[J].电工技术学报,2015,30(14):488-496.Wang Yubin,Wang Shanshan,Feng Bo,et al.Optimal current control strategy of dual-active-bridge DC-DC converter based on dual-phase-shift control[J]Transactions of China Electrotechnical Society,2015,30(14):488-496.
[2]涂春鸣,孟阳,肖凡,等.一种交直流混合微网能量路由器及其运行模态分析[J].电工技术学报,2017,32(22):176-188.Tu Chunming,Meng Yang,Xiao Fan,et al.An AC-DC hybrid microgrid energy router and operational modal analysis[J].Transactions of China Electrotechnical Society,2017,32(22):176-188.
[3]Shi Jianjiang,Gou Wei,Yuan Hao,et al.Research on voltage and power balance control for cascaded modular solid-state transformer[J].IEEE Transactions on Power Electronics,2011,26(4):1154-1166.
[4]陈彬,李琳,赵志斌.双向全桥DC-DC变换器中大容量高频变压器绕组与磁心损耗计算[J].电工技术学报,2017,32(22):123-133.Chen Bin,Li Lin,Zhao Zhibin.Calculation of high-power high-frequency transformer's copper loss and magnetic core loss in dual-active-bridge DC-DCconverter[J].Transactions of China Electrotechnical Society,2017,32(22):123-133.
[5]谷庆,袁立强,聂金铜,等.基于开关组合规律的双主动桥DC-DC变换器传输功率特性[J].电工技术学报,2017,32(13):69-79.Gu Qing,Yuan Liqiang,Nie Jintong,et al.Transmission power characteristics of dual-activebridge DC-DC converter based on the switching combination rules[J].Transactions of China Electrotechnical Society,2017,32(13):69-79.
[6]Bai Hua,Nie Ziling,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.
[7]Wen Huiqing,Su Bin.Reactive power and softswitching capability analysis of dual-active-bridge DC-DC converters with dual-phase-shift control[J].Journal of Power Electronics,2015,15(1):18-30.
[8]Zhao Biao,Yu Qingguang,Sun Weixin.Extendedphase-shift control of isolated bidirectional DC-DCconverter for power distribution in microgrid[J].IEEE Transactions on Power Electronics,2012,27(11):4667-4680.
[9]赵彪,于庆广,孙伟欣.双重移相控制的双向全桥DC-DC变换器及其功率回流特性分析[J].中国电机工程学报,2012,32(12):43-50.Zhao Biao,Yu Qingguang,Sun Weixin.Bi-directional full-bridge DC-DC converters with dual-phaseshifting control and its backflow power characteristic analysis[J].Proceedings of the CSEE,2012,32(12):43-50.
[10]程红,高巧梅,朱锦标,等.基于双重移相控制的双向全桥DC-DC变换器动态建模与最小回流功率控制[J].电工技术学报,2014,29(3):245-253.Cheng Hong,Gao Qiaomei,Zhu Jinbiao,et al.Dynamic modeling and minimum backflow power controlling of the bi-directional full-bridge DC-DCconverters based on dual-phase-shifting control[J].Transactions of China Electrotechnical Society,2014,29(3):245-253.
[11]张勋,王广柱,商秀娟,等.双向全桥DC-DC变换器回流功率优化的双重移相控制[J].中国电机工程学报,2016,36(4):1090-1097.Zhang Xun,Wang Guangzhu,Shang Xiujuan,et al.An optimized strategy based on backflow power of bi-directional dual-active-bridge DC-DC converters with dual-phase-shifting control[J].Proceedings of the CSEE,2016,36(4):1090-1097.
[12]于德,付超,王毅,等.隔离型双向直流变换器的最小回流功率移相控制方法[J].电工技术学报,2017,32(24):126-138.Yu De,Fu Chao,Wang Yi,et al.The phase-shifted control method of isolated bidirectional DC-DCconverter with minimum backflow power[J].Transactions of China Electrotechnical Society,2017,32(24):126-138.
[13]王聪,沙广林,王俊,等.基于双重移相控制的双有源桥DC-DC变换器的软开关[J].电工技术学报,2015,30(12):106-113.Wang Cong,Sha Guanglin,Wang Jun,et al.The analysis of zero voltage switching dual active bridge DC-DC converters based on dual-phase-shifting control[J].Transactions of China Electrotechnical Society,2015,30(12):106-113.
[14]Liu Xu,Zhu Z Q,Stone D A,et al.Novel dualphase-shift control with bidirectional inner phase shifts for a dual-active-bridge converter having low surge current and stable power control[J].IEEETransactions on Power Electronics,2017,32(5):4095-4106.
[15]Zhao Biao,Song Qiang,Liu Wenhua,et al.Currentstress-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.
[16]Li Jingxin,Wang Dongzhi,Wang Wei,et al.Minimize current stress of dual-active-bridge DC-DCconverters for electric vehicles based on lagrange multipliers method[J].Energy Procedia,2017,105:2733-2738.
[17]张勋,王广柱,王婷.双向全桥DC-DC变换器基于电感电流应力的双重移相优化控制[J].电工技术学报,2016,31(22):100-106.Zhang Xun,Wang Guangzhu,Wang Ting.Optimized control based on current-stress of bi-directional full-bridge DC-DC converters with dual-phaseshifting control[J].Transactions of China Electrotechnical Society,2016,31(22):100-106.
[18]王玉斌,王杉杉,封波,等.基于双重移相控制的双有源DC-DC变换器的最优电流控制[J].电工技术学报,2015,30(14):488-496.Wang Yubin,Wang Shanshan,Feng Bo,et al.Optimal current control strategy of dual-active-bridge DC-DC converter based on dual-phase-shift control[J]Transactions of China Electrotechnical Society,2015,30(14):488-496.
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