| 引用本文: | 颜湘武,王 杨,葛小凤,张 波.双管Buck-Boost变换器的带输入电压前馈双闭环控制策略[J].电力自动化设备,2016,36(10): |
| YAN Xiangwu,WANG Yang,GE Xiaofeng,ZHANG Bo.Dual-loop control with input voltage feedforward for dual-switch Buck-Boost converter[J].Electric Power Automation Equipment,2016,36(10): |
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| 摘要: |
| 针对宽范围输入的双管Buck-Boost变换器，在Buck和Boost两模式之间进行切换和输入电压发生波动时，电感电流和输出电压存在较大波动的问题，提出了带输入电压前馈的两模式平均电流控制策略。该策略通过将具有电压电流双闭环结构的平均电流控制与单载波-双调制的调制方法相结合，来提高变换器的动态响应性能，实现变换器两模式的自动近似平滑切换，同时对电感电流进行有效控制，保护设备安全。为了克服传统双闭环前馈函数实现和化简困难的缺点，提出将输入电压前馈引入电流内环从而大幅提高了变换器的输入动态响应性能。最后建立了MATLAB／Simulink仿真模型和硬件试验平台，验证了所提控制方法的有效性。 |
| 关键词: 宽范围输入DC／DC 平均电流法 单载波-双调制 输入电压前馈 双管Buck-Boost变换器 |
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| 基金项目:国家高技术研究发展计划（863计划）资助项目（2015AA050603）；河北省自然科学基金资助项目（E2014502109）；河北省科技计划项目（15214307D） |
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| Dual-loop control with input voltage feedforward for dual-switch Buck-Boost converter |
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YAN Xiangwu1, WANG Yang2, GE Xiaofeng2, ZHANG Bo1
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1.State Key Laboratory of New Energy Power System，North China Electric Power University，Baoding 071003，China;2.Zhangjiakou Wind and Solar Power Energy Demonstration Station Co.，Ltd.，State Grid Xin Yuan Company，Zhangjiakou 075000，China
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| Abstract: |
| A strategy of two-mode average current control combined with input voltage feedforward is proposed for the wide input-range dual-switch Buck-Boost converter to suppress the big fluctuation of its inductive current and output voltage during the mode switching and when the input voltage fluctuates，which combines the single-carrier dual-modulation method with the average current control in the voltage-current dual close-loop configuration to improve the dynamic response performance of the converter，realize the approximately smooth and automatic switching between Buck and Boost modes，and effectively control the inductive current for the safety of equipments. The input voltage is fed forward to the inner current loop to avoid the troublesome simplification and implementation of feedforward function for traditional dual close-loop control and greatly improve the dynamic response performance of converter input. A MATLAB／Simulink model and a hardware test platform are established to verify the validity of the proposed control strategy. |
| Key words: wide input-range DC／DC average current control method single-carrier dual-modulation input voltage feedforward two-switch Buck-Boost converter |
