光伏系统中ASI Boost变换器的稳定性分析与控制  

Stability analysis and control of Boost converter based on active switched-inductor in photovoltaic system

作　　者：顾志铭 周宇飞[1] 熊向晖 GU Zhiming;ZHOU Yufei;XIONG Xianghui(School of Electrical Engineering and Automation,Anhui University,Hefei Anhui 230601,China)

机构地区：[1]安徽大学电气工程与自动化学院,安徽合肥230601

出　　处：《电源技术》2021年第6期786-790,共5页Chinese Journal of Power Sources

基　　金：国家自然科学基金资助项目(61071023);安徽省自然科学基金资助项目(1708085MF155)。

摘　　要：有源开关电感(active switched-inductor,ASI)Boost变换器因其高电压增益,低开关应力等优点在光伏系统领域具有广阔的应用前景。对此光伏系统高增益变换器在峰值电流模式控制下的稳定性进行研究,建立其离散映射模型并分析电路参数变化对变换器稳定性的影响,通过Jacobian矩阵分析特征值揭示系统失稳机理。基于参数共振微扰原理,设计了一种适用于峰值电流模式控制的稳定控制方案——单周期复位积分补偿,研究结果表明此方案不仅使失稳系统重回稳态,在瞬态响应速度、输入电流及输出电压纹波等性能上也优于斜坡补偿、正弦补偿等控制。Boost converter based on active switched-inductor(ASI)has a broad application prospect in photovoltaic system due to its advantages of high voltage gain and low switching stress.The stability of the high gain converter of photovoltaic system under peak current mode control was studied.The discrete mapping model was established and the influence of circuit parameters on the stability of the converter was analyzed,and the instability mechanism of the system was revealed by analyzing the eigenvalues of Jacobian matrix.Based on the principle of parametric resonance perturbation,a stable control scheme for peak current mode control,one-cycle reset integral compensation,was designed.The results show that the scheme not only makes the unstable system return to steady state,but also outperforms some control methods such as slope compensation and sinusoidal compensation in terms of transient response speed,input current and output voltage ripple.

关 键 词：有源开关电感Boost变换器 稳定性分析 峰值电流模式控制 单周期复位积分补偿 

分 类 号：TM46[电气工程—电器]