| 一种宽工作范围Boost电路的滑模变结构控制策略研究 |
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| 引用本文： | 肖阔,段善旭,程华,陈昌松,万文超.一种宽工作范围Boost电路的滑模变结构控制策略研究[J].电源学报,2017,15(5):108-115. |
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| 作者姓名： | 肖阔 段善旭 程华 陈昌松 万文超 |
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| 作者单位： | 华中科技大学电气与电子工程学院, 强电磁工程与新技术国家重点实验室, 武汉 430074,华中科技大学电气与电子工程学院, 强电磁工程与新技术国家重点实验室, 武汉 430074,中国舰船研究设计中心, 武汉 430064,华中科技大学电气与电子工程学院, 强电磁工程与新技术国家重点实验室, 武汉 430074,华中科技大学电气与电子工程学院, 强电磁工程与新技术国家重点实验室, 武汉 430074 |
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| 基金项目： | 国家自然科学基金资助项目（51477067）；光宝电力电子技术科研基金资助项目（PRC20161047） |
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| 摘 要： | 由于Boost变换器自身非线性以及非最小相位的结构特点,传统PI控制器能够保证Boost变换器在所设计的额定工作点附近稳定工作,并取得良好的动态和稳态性能。当Boost变换器的工作状态与额定点发生较大偏差时,其稳定性就无法保证。因此针对Boost变换器在偏离额定工作状态下的稳定性以及动态性能不足的问题,提出了一种滑模变结构控制与PI控制器相结合的控制策略。内环为采用电感电流为反馈量的滑模控制器,外环采用以输出电容电压为反馈量的PI控制器,并在滑模控制器中引入指数趋近律改善性能,提高了Boost变换器在宽范围工作下的稳定性和动态性能。基于Boost变换器模型,针对所提出的控制策略进行控制器参数设计,最后通过仿真与实验验证了控制策略的可行性与有效性。
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| 关 键 词： | Boost变换器 滑模变结构控制 指数趋近律 宽范围 |
| 收稿时间： | 2017/5/30 0:00:00 |
| 修稿时间： | 2017/8/19 0:00:00 |
Sliding Mode Variable Structure Control Strategy of Boost Converter with Wide Working Range |
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| XIAO Kuo,DUAN ShanXu,CHENG Hu,CHEN Changsong and WAN Wenchao.Sliding Mode Variable Structure Control Strategy of Boost Converter with Wide Working Range[J].Journal of power supply,2017,15(5):108-115. |
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| Authors: | XIAO Kuo DUAN ShanXu CHENG Hu CHEN Changsong and WAN Wenchao |
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| Affiliation: | State Key Laboratory of Advanced Electromagnetic Engineering and Technology, School of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan 430074, China,State Key Laboratory of Advanced Electromagnetic Engineering and Technology, School of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan 430074, China,China Ship Development and Design Center, Wuhan 430064, China,State Key Laboratory of Advanced Electromagnetic Engineering and Technology, School of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan 430074, China and State Key Laboratory of Advanced Electromagnetic Engineering and Technology, School of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan 430074, China |
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| Abstract: | Due to the non-linearity and non-minimum phase structure of the Boost converter, the traditional PI controller ensures that the Boost converter is stable near the rated operating point and achieves good dynamic and steady-state performance. When working state has a large deviation from rated operating point, its stability can not be guaranteed. Aiming at the stability and dynamic performance of the Boost converter, a control strategy combining sliding mode variable structure control with PI controller is proposed in this paper. The inner loop is the inductor current feedback sliding mode controller while the outer loop adopts PI controller with output capacitor voltage as feedback. Exponential approach law is introduced into the sliding mode controller to improve its performance. The stability and dynamic performance of Boost converter under wide range of operation are improved. Based on the model of Boost converter, the controller parameters are designed for the proposed control strategy. Finally, the feasibility and validity of the control strategy are verified by simulation and experiment. |
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| Keywords: | Boost converter sliding mode variable structure control exponential approach law wide range |
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