基于输入输出线性化方法实现BoostPFC带恒功率负载  

Realization of Boost PFC with Constant Power Load based on Input-Output Linearization

作　　者：李刚[1] 李舒维 邱伟 LI Gang;LI Shuwei;QIU Wei(Institute of Electric Engineering,Guangxi University,Nanning 530004,China)

机构地区：[1]广西大学电气学院,广西南宁530004

出　　处：《信阳师范学院学报（自然科学版）》2020年第2期298-304,共7页Journal of Xinyang Normal University(Natural Science Edition)

基　　金：广西自然科学基金重点项目,(2017GXNSFDA198042);广西自然科学基金项目(2017GXNSFAA198344)。

摘　　要：针对原有的输入输出线性化方法只能带纯电阻负载的情形提出一种新的算法,使其能在带恒功率负载时也能成立.该算法首先根据变换器的状态空间模型得到的非线性系统通过合适的非线性坐标变换得到新坐标系下的线性系统;再依据经典线性控制理论设计控制器;最后通过Boost PFC变换器输出功率、输出电压以及输出电流的关系避免输出电流出现在占空比的计算式中.解决了因输出电流的变化过大或者不连续导致算法失效的问题.经过PSIM数字仿真实验,表明该算法具有良好的动静态特性,在接不同负载时,都能做到响应至稳时间短,输出电压恒定,且输入电流精准跟踪输入电压,在负载功率发生突变时,也能做到稳定输出,电流波形光滑,对负载具有良好的鲁棒性.The algorithm is proposed for the case that the original input-output linearization method can only be used with pure resistance load,so that it can also be established with constant power load.In this algorithm,the nonlinear system obtained from the state space model of the converter is transformed into the linear system under the new coordinate system by the appropriate nonlinear coordinate transformation;then the controller is designed according to the classical linear control theory;finally,the output current is avoided from appearing in the calculation formula of duty cycle by the relationship between the output power,output voltage and output current of the boost PFC converter,which is successful to solve the problem of algorithm failure due to the change of output current is too large or discontinuous.The results of PSIM digital simulation showed that the algorithm has good dynamic and static characteristics.When different loads are connected,the response time is short,the output voltage is constant,and the input current accurately tracks the input voltage.When the load power changes,it also can achieve stable output current,and the current waveform is smooth,which shows that the algorithm has good robustness to the load.

关 键 词：电力电子 BOOST变换器 功率因数矫正 输入输出线性化 恒功率负载 鲁棒性 

分 类 号：TM461[电气工程—电器]