基于小信号模型的Buck-Boost变换器控制策略研究
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摘要
为了解决电动汽车上电池端电压经常出现的大范围波动以及电压型逆变器的降压特性问题,用状态空间平均法建立了Buck-Boost电路的交流小信号数学模型,设计了控制系统补偿器、系统的硬件电路和软件,得到了交流小信号的线性传递函数和buck-boost变换器的线性控制策略。实验结果表明,控制系统在输入电压以及负载出现阶跃扰动的情况下,能够有效抑制低频扰动并迅速跟随给定电压实现对输出电压的闭环控制,满足电动汽车对电源系统的要求。
In order to solve the problem that large range fluctuation often occurred on the terminal voltage of the electric vehicle batteries and the problem of pressure drop characteristics of voltage source converter,state-space averaging method was used to build the mathematical model of AC small signal of Buck-Boost circuit,to design compensator of control system,hardware circuit and software of the system,and to obtain linear transfer function of AC small signal and linear control strategy of Buck-Boost converter. The experimental results show that the control system of the input voltage and load step disturbance can effectively restrain the low frequency disturbance and quickly follow the given voltage,thus realizing the closed-loop control to output voltage and satisfying the requirement of battery system of electronic vehicle.
In order to solve the problem that large range fluctuation often occurred on the terminal voltage of the electric vehicle batteries and the problem of pressure drop characteristics of voltage source converter,state-space averaging method was used to build the mathematical model of AC small signal of Buck-Boost circuit,to design compensator of control system,hardware circuit and software of the system,and to obtain linear transfer function of AC small signal and linear control strategy of Buck-Boost converter. The experimental results show that the control system of the input voltage and load step disturbance can effectively restrain the low frequency disturbance and quickly follow the given voltage,thus realizing the closed-loop control to output voltage and satisfying the requirement of battery system of electronic vehicle.
引文
[1]吴宇,皇甫宜耿,张琳,等.大扰动Buck-Boost变换器的鲁棒高阶滑模控制[J].中国电机工程学报,2015,35(7):1740-1748.WU Yu,HUANGFU Yigeng,ZHANG Lin,et al.A robust high order sliding mode for Buck-Boost converters with large disturbances[J].Proceedings of the CSEE,2015,35(7):1740-1748.
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[4]张旭辉,温旭辉,赵峰.电机控制器直流侧前置双向Buck/Boost变换器的直接功率控制策略研究[J].中国电机工程学报,2012,32(33):15-22.ZHANG Xuhui,WEN Xuhui,ZHAO Feng.A direct power control scheme for bi-directional Buck/Boost converters in motor drive systems[J].Proceedings of the CSEE,2012,32(33):15-22.
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[7]敖志勇,张加胜,陈荣.滞环电流控制双Buck-Boost逆变器[J].电测与仪表,2014,51(5):87-90.AO Zhiyong,ZHANG Jiasheng,CHEN Rong.Hysteresis current controlled dual Buck-Boost inverter[J].Electric Measurement and Instrument,2014,51(5):87-90.
[8]Luis Matinez-Salamero,Marcos Orellana,Bruno Estibals.Start-Up control and voltage regulation in a Boost converter under slidingmode operation[J].Industrial Electronic IEEE Transaction on,2013,60(10):4637-4649.
[9]周宏林,肖帅,杨耕.一种双向级联式Buck-Boost逆变器的建模与分析[J].电源学报,2012(3):18-22.ZHOU Honglin,XIAO Shuai,YANG Geng.Modeling and analysis of a new bi-directional Buck-Boost cascade inverter[J].Journal of Power Supply,2012(3):18-22.
[10]袁雷,沈建清,肖飞.电流模式控制Buck-Boost变换器建模及非线性现象仿真[J].中南大学学报(自然科学版),2012,43(2):972-976.YUAN Lei,SHEN Jianqing,XIAO Fei.Modeling and nonlinear phenomena simulation of current-mode controlled Buck-Boost converter[J].Journal of Central South University(Science and Technology),2012,43(2):972-976.
[11]张哲,专祥涛,于炎娟.基于状态空间平均法的逆变器建模与控制策略的研究[J].自动化与仪表,2015(8):58-63.ZHANG Zhe,ZHUAN Xiangtao,YU Yanjuan.Study on modeling and control of inverter system based on the state space average method[J].Automation and Instrumentation.2015(8):58-63.
[12]于月森,戚文艳.Buck-Boost变换器的环路补偿与仿真[J].电测与仪表,2014,51(8):91-94.YU Yuesen,QI Wenyan.Loop compensation and simulation of Buck-Boost converter[J].Electric Measurement and Instrument,2014,51(8):91-94.
[13]乔辉,华泽玺,李佩军.基于MLX91205电流传感器的电机驱动系统[J].仪表技术与传感器,2015(6):77-79.QIAO Hui,HUA Zexi,LI Peijun.Design of motor drive system based on current sensor MLX91205[J].Instrumentation Technique and Sensor,2015(6):77-79.
[2]刘平.电动汽车双向准Z源逆变器系统及控制研究[D].重庆:重庆大学,2013.LIU Ping.Development and control of bi-directional quasi-Zsource inverter for electric vehicles[D].Chongqing:Chongqing University,2013.
[3]夏正鹏,汪兴兴,倪红军,等.电动汽车电池管理系统研究进展[J].电源技术,2012,36(7):1052-1054.XIA Zhengpeng,WANG Xingxing,NI Hongjun,et al.Research progress of battery management system for electric vehicle[J].Journal of power sources,2012,36(7):1052-1054.
[4]张旭辉,温旭辉,赵峰.电机控制器直流侧前置双向Buck/Boost变换器的直接功率控制策略研究[J].中国电机工程学报,2012,32(33):15-22.ZHANG Xuhui,WEN Xuhui,ZHAO Feng.A direct power control scheme for bi-directional Buck/Boost converters in motor drive systems[J].Proceedings of the CSEE,2012,32(33):15-22.
[5]Loh,P.C Buck-boost thyristor-based PWM current-source inverter[J].Electric Power Applications,IEE Proceedings,2006,153(5):664-672.
[6]易灵芝,何东,王书颢,等.面向直流楼宇供电技术的新型多输入Buck-Boost变换器[J].电力自动化设备,2014,34(5):86-92.YI Lingzhi,HE Dong,WANG Shuhao,et al.Multi-input BuckBoost converter for DC building power supply[J].Electric Power Automation Equipment,2014,34(5):86-92.
[7]敖志勇,张加胜,陈荣.滞环电流控制双Buck-Boost逆变器[J].电测与仪表,2014,51(5):87-90.AO Zhiyong,ZHANG Jiasheng,CHEN Rong.Hysteresis current controlled dual Buck-Boost inverter[J].Electric Measurement and Instrument,2014,51(5):87-90.
[8]Luis Matinez-Salamero,Marcos Orellana,Bruno Estibals.Start-Up control and voltage regulation in a Boost converter under slidingmode operation[J].Industrial Electronic IEEE Transaction on,2013,60(10):4637-4649.
[9]周宏林,肖帅,杨耕.一种双向级联式Buck-Boost逆变器的建模与分析[J].电源学报,2012(3):18-22.ZHOU Honglin,XIAO Shuai,YANG Geng.Modeling and analysis of a new bi-directional Buck-Boost cascade inverter[J].Journal of Power Supply,2012(3):18-22.
[10]袁雷,沈建清,肖飞.电流模式控制Buck-Boost变换器建模及非线性现象仿真[J].中南大学学报(自然科学版),2012,43(2):972-976.YUAN Lei,SHEN Jianqing,XIAO Fei.Modeling and nonlinear phenomena simulation of current-mode controlled Buck-Boost converter[J].Journal of Central South University(Science and Technology),2012,43(2):972-976.
[11]张哲,专祥涛,于炎娟.基于状态空间平均法的逆变器建模与控制策略的研究[J].自动化与仪表,2015(8):58-63.ZHANG Zhe,ZHUAN Xiangtao,YU Yanjuan.Study on modeling and control of inverter system based on the state space average method[J].Automation and Instrumentation.2015(8):58-63.
[12]于月森,戚文艳.Buck-Boost变换器的环路补偿与仿真[J].电测与仪表,2014,51(8):91-94.YU Yuesen,QI Wenyan.Loop compensation and simulation of Buck-Boost converter[J].Electric Measurement and Instrument,2014,51(8):91-94.
[13]乔辉,华泽玺,李佩军.基于MLX91205电流传感器的电机驱动系统[J].仪表技术与传感器,2015(6):77-79.QIAO Hui,HUA Zexi,LI Peijun.Design of motor drive system based on current sensor MLX91205[J].Instrumentation Technique and Sensor,2015(6):77-79.