| 附加电感电流线性反馈控制的级联DC-DC变换器稳定性提升方法 |
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| 引用本文： | 李虹,郭钟雅,刘晨,赵洋洋,苏文哲,张波.附加电感电流线性反馈控制的级联DC-DC变换器稳定性提升方法[J].电源学报,2019,17(3):103-110. |
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| 作者姓名： | 李虹 郭钟雅 刘晨 赵洋洋 苏文哲 张波 |
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| 作者单位： | 北京交通大学电气工程学院;华南理工大学电力学院 |
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| 基金项目： | 国家自然科学基金资助面上项目（51577010，51777012） |
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| 摘 要： | 源变换器和负载变换器的相互作用会导致级联DC-DC变换器的不稳定问题,因此,提升级联系统的稳定性很有必要。针对上述问题,将特征值灵敏度应用到级联DC-DC变换器的时域模型中,无需计算源变换器输出阻抗和负载变换器输入阻抗,从时域角度提出了附加电感电流线性反馈控制的级联DC-DC变换器稳定性提高控制方法。同时,基于时域模型直观分析了新引入的控制变量对系统稳定性的影响。最后,通过仿真和实验验证了所提控制方法的有效性。
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| 关 键 词： | 级联DC-DC变换器 稳定性提升 时域建模 特征值灵敏度 |
| 收稿时间： | 2019/3/6 0:00:00 |
| 修稿时间： | 2019/4/16 0:00:00 |
Stability Improvement Method for Cascaded DC-DC Converters with Additional Inductor Current Linear Feedback Control |
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| LI Hong,GUO Zhongy,LIU Chen,ZHAO Yangyang,SU Wenzhe and ZHANG Bo.Stability Improvement Method for Cascaded DC-DC Converters with Additional Inductor Current Linear Feedback Control[J].Journal of power supply,2019,17(3):103-110. |
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| Authors: | LI Hong GUO Zhongy LIU Chen ZHAO Yangyang SU Wenzhe and ZHANG Bo |
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| Affiliation: | School of Electrical Engineering, Beijing Jiaotong University, Beijing 100044, China,School of Electrical Engineering, Beijing Jiaotong University, Beijing 100044, China,School of Electrical Engineering, Beijing Jiaotong University, Beijing 100044, China,School of Electrical Engineering, Beijing Jiaotong University, Beijing 100044, China,School of Electrical Engineering, Beijing Jiaotong University, Beijing 100044, China and School of Electric Power, South China University of Technology, Guangzhou 510641, China |
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| Abstract: | The interaction between a source converter and a load converter may cause the instability problem to arise in cascaded DC-DC converters. Therefore, it is necessary to improve the stability of the cascaded system. To solve the above problem, eigenvalue sensitivity is applied to the time-domain model of cascaded DC-DC converters. Without calculating the output impedance of the source converter and the input impedance of the load converter, a stability improvement method for cascaded DC-DC converters with additional inductor current linear feedback control is proposed from the aspect of time domain. At the same time, the influences of the newly introduced control variable on the system''s stability are intuitively analyzed based on the time-domain model. At last, the effectiveness of the proposed control method was verified by simulations and experiments. |
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| Keywords: | cascaded DC-DC converter stability improvement time-domain modeling eigenvalue sensitivity |
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