基于双主动桥输入输出电流协调控制的二次纹波电压抑制策略
|
摘要
单相电力电子变压器(PET)隔离级传输二次脉动功率较少且不可控,使其直流侧出现较大幅度的二次纹波电压,将影响系统供电质量以及供电可靠性。在传统双主动桥(DAB)降阶等效模型中加入开关电阻、变压器磁化电感和铜耗电阻,提升了二次脉动功率传输的准确性;在DAB控制中,电流内环采用比例-积分-谐振(PIR)控制,并引入低压直流侧二次纹波电流前馈,使高低压直流侧二次脉动功率向负载侧稳定传输,高低压直流侧二次纹波电压幅值显著减小;为加快控制器动态响应速度,对控制器关键参数进行优化设计,最后通过仿真和实验验证了所提方法的有效性。
The secondary ripple power transmission of isolation stage of single-phase PET(Power Electronic Transformer) is small and uncontrollable. As a result,a large amplitude secondary ripple voltage appears on the DC side,which could negatively impact the quality and reliability of the power supply system. The switch resistance,transformer magnetizing inductance and copper loss resistance are added to the traditional dual active bridge reduced-order equivalent model,which can improve the accuracy of secondary ripple power transmission. Moreover,in the control of DAB(Double Active Bridge),PIR(Proportional-Integral-Resonant) control is employed in the inner cur-rent-loop,and the secondary ripple current on the low voltage side is used as feed-forward compensation. Consequently,stable transmission of secondary ripple power from high and low voltage DC side to load side can be achie-ved,which enables greatly reduced secondary ripple voltage amplitude at high and low voltage DC sides. To improve the dynamic response of the controller,the critical parameters of the controller are optimized. Finally,the effectiveness of the proposed method is verified by simulation and experiment.
The secondary ripple power transmission of isolation stage of single-phase PET(Power Electronic Transformer) is small and uncontrollable. As a result,a large amplitude secondary ripple voltage appears on the DC side,which could negatively impact the quality and reliability of the power supply system. The switch resistance,transformer magnetizing inductance and copper loss resistance are added to the traditional dual active bridge reduced-order equivalent model,which can improve the accuracy of secondary ripple power transmission. Moreover,in the control of DAB(Double Active Bridge),PIR(Proportional-Integral-Resonant) control is employed in the inner cur-rent-loop,and the secondary ripple current on the low voltage side is used as feed-forward compensation. Consequently,stable transmission of secondary ripple power from high and low voltage DC side to load side can be achie-ved,which enables greatly reduced secondary ripple voltage amplitude at high and low voltage DC sides. To improve the dynamic response of the controller,the critical parameters of the controller are optimized. Finally,the effectiveness of the proposed method is verified by simulation and experiment.
引文
[1] 赵争鸣,冯高辉,袁立强,等. 电能路由器的发展及其关键技术[J]. 中国电机工程学报,2017,37(13):3823-3834.ZHAO Zhengming,FENG Gaohui,YUAN Liqiang,et al. The deve-lopment and key technologies of electric energy router[J]. Procee-dings of the CSEE,2017,37(13):3823-3834.
[2] 丁明,陈中,张国荣,等. 级联H桥储能变换器直流纹波电流的无源与有源抑制策略[J]. 电力自动化设备,2016,36(4):19-24,61. DING Ming,CHEN Zhong,ZHANG Guorong,et al. Passive and active schemes of DC ripple suppression for cascaded H-bridge converter of energy storage system[J]. Electric Power Automation Equipment,2016,36(4):19-24,61.
[3] WANG J,JI B,LU X,et al. Steady-state and dynamic input current low-frequency ripple evaluation and reduction in two-stage single-phase inverters with back current gain model[J]. IEEE Tran-sactions on Power Electronics,2014,29(8):4247-4260.
[4] 王浩然,朱国荣,伏潇斌,等. 无电解电容单相电力变换器直接脉动功率控制方法[J]. 中国电机工程学报,2016,36(13):3573-3581,3376.WANG Haoran,ZHU Guorong,FU Xiaobin,et al. A directly pulsation power control strategy for single-phase power converters with E-cap free[J]. Proceedings of the CSEE,2016,36(13):3573-3581,3376.
[5] 汪飞,雷志方,梁东,等. 单相逆变器低频脉动电流抑制机理分析与方法综述[J]. 电力自动化设备,2017,37(2):184-191,198.WANG Fei,LEI Zhifang,LIANG Dong,et al. Analysis of mecha-nism and review of methods for low-frequency ripple current suppression of single-phase inverter[J]. Electric Power Automation Equipment,2017,37(2):184-191,198.
[6] 李红波,张凯,赵晖,等. 基于功率解耦的高功率密度单相整流器[J]. 电工技术学报,2011,26(增刊1):77-82.LI Hongbo,ZHANG Kai,ZHAO Hui,et al. A high power density single rectifier with power decoupling function[J]. Transactions of China Electrotechnical Society,2011,26(Supplement 1):77-82.
[7] 李红波,张凯,赵晖. 高功率密度单相变换器的直流有源滤波器研究[J]. 中国电机工程学报,2012,32(15):40-47.LI Hongbo,ZHANG Kai,ZHAO Hui. Researches on DC active power filters for high power density single phase converters[J]. Procee-dings of the CSEE,2012,32(15):40-47.
[8] 殷晓东,罗登,李祖勇,等. 一种双向隔离DC-DC变换器二次纹波电压抑制方法[J]. 电工技术学报,2018,33(6):1356-1363.YIN Xiaodong,LUO Deng,LI Zuyong,et al. A second-order ripple voltage suppression algorithm of bidirectional isolation DC-DC converter[J]. Transactions of China Electrotechnical Society,2018,33(6):1356-1363.
[9] 候虚虚,秦岭,茅靖峰,等. 两级式单相光伏并网逆变器输入电压PI+QPR鲁棒控制器设计[J]. 电网技术,2017,41(9):2910-2918. HOU Xuxu,QIN Ling,MAO Jingfeng,et al. Design of input voltage robust PI+QPR controller for two-stage single-phase PV grid-connected inverter[J]. Power System Technology,2017,41(9):2910-2918.
[10] 祝国平,阮新波,王学华,等. 两级式单相逆变器二次纹波电流的抑制与动态特性的改善[J]. 中国电机工程学报,2013,33(12):72-80,188.ZHU Guoping,RUAN Xinbo,WANG Xuehua,et al. Suppression of the second harmonic current and improvement of the dynamic performance for two-stage single-phase inverters[J]. Proceedings of the CSEE,2013,33(12):72-80,188.
[11] 张力,任小永,阮新波. 基于虚拟阻抗且提高系统带宽的抑制两级式逆变器中二次谐波电流的控制策略[J]. 电工技术学报,2014,29(6):136-144.ZHANG Li,REN Xiaoyong,RUAN Xinbo. Control strategy to improve the bandwidth and reduce the second harmonic current in the two-stage inverter based on virtual impedance[J]. Transactions of China Electrotechnical Society,2014,29(6):136-144.
[12] KSIAZEK P F,ORDONEZ M. Swinging bus technique for ripple current elimination in fuel cell power conversion[J]. IEEE Tran-sactions on Power Electronic,2014,29(1):170-178.
[13] 郭晓瑞,王培良,郭吉丰,等. 光伏并网逆变器母线电压纹波的分析与控制[J]. 电力自动化设备,2017,37(5):48-53.GUO Xiaorui,WANG Peiliang,GUO Jifeng,et al. Analysis and control of bus voltage ripples for grid-connected photovoltaic inverter[J]. Electric Power Automation Equipment,2017,37(5):48-53.
[14] 李红波. 大功率交直交牵引变流器相关问题研究[D]. 武汉:华中科技大学,2012.LI Hongbo. Study of high power AC-DC-AC traction converter[D]. Wuhan:Huazhong University of Science and Technology,2012.
[15] ZHANG K,SHAN Z,JATSKEVICH J. Large- and small-signal ave-rage-value modeling of dual-active-bridge DC-DC converter consi-dering power losses[J]. IEEE Transactions on Power Electronics,2017,32(3):1964-1974.
[16] 秦世耀,刘其辉,宋诗雨,等. 考虑转子电压电流耦合全补偿的双馈感应发电机改进PI-R电流控制策略[J]. 电力自动化设备,2017,37(7):198-204,212.QIN Shiyao,LIU Qihui,SONG Shiyu,et al. Improved PI-R current control strategy with complete compensation for coupled harmonic voltage and current of DFIG rotor[J]. Electric Power Automation Equipment,2017,37(7):198-204,212.
[2] 丁明,陈中,张国荣,等. 级联H桥储能变换器直流纹波电流的无源与有源抑制策略[J]. 电力自动化设备,2016,36(4):19-24,61. DING Ming,CHEN Zhong,ZHANG Guorong,et al. Passive and active schemes of DC ripple suppression for cascaded H-bridge converter of energy storage system[J]. Electric Power Automation Equipment,2016,36(4):19-24,61.
[3] WANG J,JI B,LU X,et al. Steady-state and dynamic input current low-frequency ripple evaluation and reduction in two-stage single-phase inverters with back current gain model[J]. IEEE Tran-sactions on Power Electronics,2014,29(8):4247-4260.
[4] 王浩然,朱国荣,伏潇斌,等. 无电解电容单相电力变换器直接脉动功率控制方法[J]. 中国电机工程学报,2016,36(13):3573-3581,3376.WANG Haoran,ZHU Guorong,FU Xiaobin,et al. A directly pulsation power control strategy for single-phase power converters with E-cap free[J]. Proceedings of the CSEE,2016,36(13):3573-3581,3376.
[5] 汪飞,雷志方,梁东,等. 单相逆变器低频脉动电流抑制机理分析与方法综述[J]. 电力自动化设备,2017,37(2):184-191,198.WANG Fei,LEI Zhifang,LIANG Dong,et al. Analysis of mecha-nism and review of methods for low-frequency ripple current suppression of single-phase inverter[J]. Electric Power Automation Equipment,2017,37(2):184-191,198.
[6] 李红波,张凯,赵晖,等. 基于功率解耦的高功率密度单相整流器[J]. 电工技术学报,2011,26(增刊1):77-82.LI Hongbo,ZHANG Kai,ZHAO Hui,et al. A high power density single rectifier with power decoupling function[J]. Transactions of China Electrotechnical Society,2011,26(Supplement 1):77-82.
[7] 李红波,张凯,赵晖. 高功率密度单相变换器的直流有源滤波器研究[J]. 中国电机工程学报,2012,32(15):40-47.LI Hongbo,ZHANG Kai,ZHAO Hui. Researches on DC active power filters for high power density single phase converters[J]. Procee-dings of the CSEE,2012,32(15):40-47.
[8] 殷晓东,罗登,李祖勇,等. 一种双向隔离DC-DC变换器二次纹波电压抑制方法[J]. 电工技术学报,2018,33(6):1356-1363.YIN Xiaodong,LUO Deng,LI Zuyong,et al. A second-order ripple voltage suppression algorithm of bidirectional isolation DC-DC converter[J]. Transactions of China Electrotechnical Society,2018,33(6):1356-1363.
[9] 候虚虚,秦岭,茅靖峰,等. 两级式单相光伏并网逆变器输入电压PI+QPR鲁棒控制器设计[J]. 电网技术,2017,41(9):2910-2918. HOU Xuxu,QIN Ling,MAO Jingfeng,et al. Design of input voltage robust PI+QPR controller for two-stage single-phase PV grid-connected inverter[J]. Power System Technology,2017,41(9):2910-2918.
[10] 祝国平,阮新波,王学华,等. 两级式单相逆变器二次纹波电流的抑制与动态特性的改善[J]. 中国电机工程学报,2013,33(12):72-80,188.ZHU Guoping,RUAN Xinbo,WANG Xuehua,et al. Suppression of the second harmonic current and improvement of the dynamic performance for two-stage single-phase inverters[J]. Proceedings of the CSEE,2013,33(12):72-80,188.
[11] 张力,任小永,阮新波. 基于虚拟阻抗且提高系统带宽的抑制两级式逆变器中二次谐波电流的控制策略[J]. 电工技术学报,2014,29(6):136-144.ZHANG Li,REN Xiaoyong,RUAN Xinbo. Control strategy to improve the bandwidth and reduce the second harmonic current in the two-stage inverter based on virtual impedance[J]. Transactions of China Electrotechnical Society,2014,29(6):136-144.
[12] KSIAZEK P F,ORDONEZ M. Swinging bus technique for ripple current elimination in fuel cell power conversion[J]. IEEE Tran-sactions on Power Electronic,2014,29(1):170-178.
[13] 郭晓瑞,王培良,郭吉丰,等. 光伏并网逆变器母线电压纹波的分析与控制[J]. 电力自动化设备,2017,37(5):48-53.GUO Xiaorui,WANG Peiliang,GUO Jifeng,et al. Analysis and control of bus voltage ripples for grid-connected photovoltaic inverter[J]. Electric Power Automation Equipment,2017,37(5):48-53.
[14] 李红波. 大功率交直交牵引变流器相关问题研究[D]. 武汉:华中科技大学,2012.LI Hongbo. Study of high power AC-DC-AC traction converter[D]. Wuhan:Huazhong University of Science and Technology,2012.
[15] ZHANG K,SHAN Z,JATSKEVICH J. Large- and small-signal ave-rage-value modeling of dual-active-bridge DC-DC converter consi-dering power losses[J]. IEEE Transactions on Power Electronics,2017,32(3):1964-1974.
[16] 秦世耀,刘其辉,宋诗雨,等. 考虑转子电压电流耦合全补偿的双馈感应发电机改进PI-R电流控制策略[J]. 电力自动化设备,2017,37(7):198-204,212.QIN Shiyao,LIU Qihui,SONG Shiyu,et al. Improved PI-R current control strategy with complete compensation for coupled harmonic voltage and current of DFIG rotor[J]. Electric Power Automation Equipment,2017,37(7):198-204,212.