摘要
针对太阳能光伏发电系统中蓄电池直接向直流负载供电时输出电压波动的问题,设计了一种基于非线性模型的Boost转换器。分析和建立了系统的状态空间平均模型及摄动模型,采用状态反馈和线性微分包含方法进行线性化,构建了闭环控制系统,并设计了线性矩阵不等式(LMI)优化控制方案。采用Simulink进行了仿真,并构建了实验电路。仿真和实验结果表明,当光伏蓄电池输出电压大范围波动以及直流负载电阻在大范围取不同的电阻值时,Boost转换器的输出电压能够很好地稳定在设定值。该转换器具有鲁棒稳定、体积小、转换效率高和输出电压纹波小等特点,完全能满足光伏蓄电池的应用要求。
According to the output voltage fluctuation of the DC load powered directly by the solar photovoltaic battery,a Boost converter is designed based on the nonlinear model. The state-space average model and perturbation model are analysed and established. The state feedback and linear differential inclusion are used for the linearization of the system. The closed-loop control system is built and the LMI optimal control scheme is designed. Simulation is processed by using simulink and the experiment circuit is constructed. The simulation and experimental results show that the output voltage of the Boost converter can be in a very good stability in tracking the desired voltage when the output voltage of photovoltaic battery is in a range of fluctuation and the DC load resistance is in different values with a wide range. The converter has characteristics such as robust stability,small volume,high efficiency and low ripple of output voltage,and can fully meet the application requirements of the photovoltaic battery.
出处
《自动化仪表》
CAS
2015年第12期81-86,共6页
Process Automation Instrumentation
基金
江苏省高等学校优秀科技创新团队基金资助项目(编号:苏教科(2013)10号)
江苏省高校优秀中青年教师境外研修基金资助项目(编号:苏经信经合(2012)565号)
