双管正激变换器的输入输出线性化控制研究
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摘要
针对传统双管正激变换器采用电压型PI控制策略时其动态响应速度较慢的问题,基于输入输出线性化方法,采用了一种新颖的非线性控制算法来改善其动态响应速度。该算法是在变换器的状态空间模型基础上建立其单输入单输出仿射非线性系统模型,采用输入输出线性化方法,通过适当的非线性坐标变换与状态反馈来推导出新的控制归律,由此得出电感电流与输出电容电压的解耦控制算法。用PSIM软件对得到的控制算法进行仿真,并通过搭建一台功率为250 W的实验装置对控制效果进行研究。结果表明,基于输入输出线性化控制的双管正激变换器具有更快的动态响应速度与较强的鲁棒性。
Aiming at the problems such as the slow dynamic response speed using PI control method for the traditional two-transistor forward converter. A novel non-linear control law based on inputoutput linearization method is adopted in the two-transistor forward converter to improve the dynamic response speed. The essential idea for the method is to establish a single input and single output affined nonlinear system model based on the state space model of the converter. Then by using input and output linearization method to derive the new control law by appropriate nonlinear coordinate transformation and state feedback. Thus the decoupling control algorithm of the inductor current and the output capacitor voltage is obtained. The control algorithm is simulated on PSIM software and verified by setting up a 250 W device. The results suggest that the two-transistor forward converter have the faster dynamic response speed and stronger robustness based on the input-output linearization method.
Aiming at the problems such as the slow dynamic response speed using PI control method for the traditional two-transistor forward converter. A novel non-linear control law based on inputoutput linearization method is adopted in the two-transistor forward converter to improve the dynamic response speed. The essential idea for the method is to establish a single input and single output affined nonlinear system model based on the state space model of the converter. Then by using input and output linearization method to derive the new control law by appropriate nonlinear coordinate transformation and state feedback. Thus the decoupling control algorithm of the inductor current and the output capacitor voltage is obtained. The control algorithm is simulated on PSIM software and verified by setting up a 250 W device. The results suggest that the two-transistor forward converter have the faster dynamic response speed and stronger robustness based on the input-output linearization method.
引文
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[14]丁志亮.双管正激同步整流变换器的研究[D].武汉:华中科技大学,2006.
[2]苏琦,陆益民,黄显峰.电压反馈性BOOST变换器闭环控制系统的分叉及混沌[J].广西大学学报(自然科学版),2015,40(5):1192-1200.
[3]高朝晖,林辉,张晓斌.Boost变换器带恒功率负载状态反馈精确线性化与最优跟踪控制技术研究[J].中国电机工程学报,2007,27(13):70-75.
[4]帅定新,谢运祥,王晓刚.基于状态反馈精确线性化Buck变换器的最优控制[J].中国电机工程学报,2008,28(33):1-5.
[5]邓卫华,张波,丘东元,等.CCM Boost变换器状态反馈精确线性化与非线性PID控制研究[J].中国电机工程学报,2004,24(8):45-50.
[6]邓卫华,张波,丘东元,等.三相电压型PWM整流器状态反馈精确线性化解耦控制研究[J].中国电机工程学报,2005,25(7):97-103.
[7]SIR R H,LISCHINSKY A P.Dynamical discontinuous feedback control of nonlinear systems[J].IEEE Transactions on Automatic Control,1990:35(12):1373-1378.
[8]LEE T S.Input-output linearization and zero-dynamics control of three-phase AC/DC voltage-source converters[J].IEEE Trans.on Power Electronics,2003,18(1):11-22.
[9]BYRNES C I,ISIDORI A,WILLIAMS J C.Passivity,feedback equivalence and the global stabilization of minimum phase nonlinear systems[J].IEEE Trans on Automatic Control,1991,36(11):1228-1240.
[10]帅定新,谢运祥,杨金明,等.基于状态反馈精确线性化单相全桥逆变器的最优控制[J].电工技术学报,2009,24(11):120-126.
[11]KATAOKA Y S.State feedback control of current type PWM ac-to-dc converters[J].IEEE Transactions on industrial application,1993:29(99):1090-1097.
[12]李啸骢.一种多指标非线性控制设计方法及其在电力系统中的应用[D].武汉:华中科技大学,2004.
[13]李啸骢,程时杰,韦化.输出函数在单输入单输出非线性控制系统设计中的重要作用[J].中国电机工程学报,2004,24(10):50-56.
[14]丁志亮.双管正激同步整流变换器的研究[D].武汉:华中科技大学,2006.