直流微电网内DC/DC变换器非线性控制策略研究
|
摘要
针对直流微电网内储能DC/DC变换器的非线性特性和输出电压扰动较大等问题。基于精确反馈线性化理论提出一种新颖的非线性级联控制器。在所提出的控制策略中,外部电压采用鲁棒性强的PI控制器,内部电流环采用非线性控制。在此基础上,对所提出的级联控制器策略进行Matlab/Simulink仿真,实验结果表明,所提方法具有良好的动态响应和鲁棒特性,在负载出现波动的情况下输出母线电压仍能保持恒定运行,并极大地提高了直流微电网内储能变换器的抗干扰能力。
Since the non-linear characteristic and large output voltage disturbance exist in DC/DC energy storage convert-ers in the DC microgrid,a novel nonlinear cascade controller is proposed based on the accurate feedback linearization theory.The PI controller with strong robustness and nonlinear control is adopted respectively for external voltage and the internal currentloop in the proposed control strategy. On this basis,the proposed cascade controller strategy was simulated with the software Mat-lab/Simulink. The experimental results show that the proposed method has a good dynamic response and robustness,and the out-put bus voltage still maintains stable operation in the case of load fluctuations,which can greatly improve the anti-interferenceability of energy storage converters in the DC microgrid.
Since the non-linear characteristic and large output voltage disturbance exist in DC/DC energy storage convert-ers in the DC microgrid,a novel nonlinear cascade controller is proposed based on the accurate feedback linearization theory.The PI controller with strong robustness and nonlinear control is adopted respectively for external voltage and the internal currentloop in the proposed control strategy. On this basis,the proposed cascade controller strategy was simulated with the software Mat-lab/Simulink. The experimental results show that the proposed method has a good dynamic response and robustness,and the out-put bus voltage still maintains stable operation in the case of load fluctuations,which can greatly improve the anti-interferenceability of energy storage converters in the DC microgrid.
引文
[1]孟明,陈世超,赵树军,等.新能源微电网研究综述[J].现代电力,2017,34(1):1?7.MENG Ming,CHEN Shichao,ZHAO Shujun,et al. Overviewon research of renewable energy microgrid[J]. Modern electricpower,2017,34(1):1?7.
[2]康家玉,刘甲琛,王素娥.户用型微电网恒功率控制方法的研究[J].现代电子技术,2017,40(24):151?153.KANG Jiayu,LIU Jiachen,WANG Su’e. Research on con?stant power control method for household microgrid[J] Modernelectronics technique,2017,40(24):151?153.
[3]李显国,戴瑜兴,周稳,等.光储直流微网分散式协调控制运行策略[J].现代电子技术,2017,40(12):1?5.LI Xianguo,DAI Yuxing,ZHOU Wen,et al. Decentralized co?ordination control operation strategy for DC microgrid of photo?voltaic and energy storage system[J]. Modern electronics tech?nique,2017,40(12):1?5.
[4]武伟,谢少军,张曌,等.基于MMC双向DC?DC变换器的超级电容储能系统控制策略分析与设计[J].中国电机工程学报,2014,34(27):4568?4575.WU Wei,XIE Shaojun,ZHANG Zhao,et al. Analysis and de?sign of control strategy for MMC?BDC based ultra?capacitors en?ergy storage systems[J]. Proceedings of the CSEE,2014,34(27):4568?4575.
[5]王冕,田野,李铁民,等.应用于储能系统的双向DC?DC变换器研究[J].电工技术学报,2013,28(8):66?71.WANG Mian,TIAN Ye,LI Tiemin,et al. Study of bidirection?al DC?DC converters applied to energy storage system[J].Transactions of China Electrotechnical Society,2013,28(8):66?71.
[6]杨晨,谢少军,毛玲,等.基于双管Buck?Boost变换器的直流微电网光伏接口控制分析[J].电力系统自动化,2012,36(13):45?50.YANG Chen,XIE Shaojun,MAO Ling,et al. Analysis on con?trol strategy of two?switch buck?boost converter for photovoltaicinterface in DC microgrid[J]. Automation of electric power sys?tems,2012,36(13):45?50.
[7]李玉梅,査晓明,刘飞,等.带恒功率负荷的直流微电网母线电压稳定控制策略[J].电力自动化设备,2014,34(8):57?64.LI Yumei,ZHA Xiaoming,LIU Fei,et al. Stability controlstrategy for DC microgrid with constant power load[J] Electricpower automation equipment,2014,34(8):57?64.
[8]刘卓然,许海平,张祖之,等.Buck类DC/DC变换器状态反馈精确线性化恒流控制方法[J].中国电机工程学报,2017,37(2):628?634.LIU Zhuoran,XU Haiping,ZHANG Zuzhi,et al. A novelscheme of constant current control strategy based on state feed?back linearization for buck?derived DC/DC converter[J]. Pro?ceedings of the CSEE,2017,37(2):628?634.
[9]刘锦波,明文龙.一种基于输入/输出反馈线性化的Boost型DC/DC变换器非线性控制方案[J].中国电机工程学报,2010,30(27):55?61.LIU Jinbo,MING Wenlong. A novel scheme of nonlinear con?trol strategy based on input?output linerization for Boost typeDC/DC converter[J]. Proceedings of the CSEE,2010,30(27):55?61.
[10]郭昊天,戚栋,苑长富,等.超级电容储能系统的滑模变结构控制算法研究[J].电源技术,2016,40(10):2026?2029.GUO Haotian,QI Dong,YUAN Changfu,et al. Research ofsliding mode control strategy in supercapacitor?based energystorage system[J]. Chinese journal of power sources,2016,40(10):2026?2029.
[2]康家玉,刘甲琛,王素娥.户用型微电网恒功率控制方法的研究[J].现代电子技术,2017,40(24):151?153.KANG Jiayu,LIU Jiachen,WANG Su’e. Research on con?stant power control method for household microgrid[J] Modernelectronics technique,2017,40(24):151?153.
[3]李显国,戴瑜兴,周稳,等.光储直流微网分散式协调控制运行策略[J].现代电子技术,2017,40(12):1?5.LI Xianguo,DAI Yuxing,ZHOU Wen,et al. Decentralized co?ordination control operation strategy for DC microgrid of photo?voltaic and energy storage system[J]. Modern electronics tech?nique,2017,40(12):1?5.
[4]武伟,谢少军,张曌,等.基于MMC双向DC?DC变换器的超级电容储能系统控制策略分析与设计[J].中国电机工程学报,2014,34(27):4568?4575.WU Wei,XIE Shaojun,ZHANG Zhao,et al. Analysis and de?sign of control strategy for MMC?BDC based ultra?capacitors en?ergy storage systems[J]. Proceedings of the CSEE,2014,34(27):4568?4575.
[5]王冕,田野,李铁民,等.应用于储能系统的双向DC?DC变换器研究[J].电工技术学报,2013,28(8):66?71.WANG Mian,TIAN Ye,LI Tiemin,et al. Study of bidirection?al DC?DC converters applied to energy storage system[J].Transactions of China Electrotechnical Society,2013,28(8):66?71.
[6]杨晨,谢少军,毛玲,等.基于双管Buck?Boost变换器的直流微电网光伏接口控制分析[J].电力系统自动化,2012,36(13):45?50.YANG Chen,XIE Shaojun,MAO Ling,et al. Analysis on con?trol strategy of two?switch buck?boost converter for photovoltaicinterface in DC microgrid[J]. Automation of electric power sys?tems,2012,36(13):45?50.
[7]李玉梅,査晓明,刘飞,等.带恒功率负荷的直流微电网母线电压稳定控制策略[J].电力自动化设备,2014,34(8):57?64.LI Yumei,ZHA Xiaoming,LIU Fei,et al. Stability controlstrategy for DC microgrid with constant power load[J] Electricpower automation equipment,2014,34(8):57?64.
[8]刘卓然,许海平,张祖之,等.Buck类DC/DC变换器状态反馈精确线性化恒流控制方法[J].中国电机工程学报,2017,37(2):628?634.LIU Zhuoran,XU Haiping,ZHANG Zuzhi,et al. A novelscheme of constant current control strategy based on state feed?back linearization for buck?derived DC/DC converter[J]. Pro?ceedings of the CSEE,2017,37(2):628?634.
[9]刘锦波,明文龙.一种基于输入/输出反馈线性化的Boost型DC/DC变换器非线性控制方案[J].中国电机工程学报,2010,30(27):55?61.LIU Jinbo,MING Wenlong. A novel scheme of nonlinear con?trol strategy based on input?output linerization for Boost typeDC/DC converter[J]. Proceedings of the CSEE,2010,30(27):55?61.
[10]郭昊天,戚栋,苑长富,等.超级电容储能系统的滑模变结构控制算法研究[J].电源技术,2016,40(10):2026?2029.GUO Haotian,QI Dong,YUAN Changfu,et al. Research ofsliding mode control strategy in supercapacitor?based energystorage system[J]. Chinese journal of power sources,2016,40(10):2026?2029.