A LC Parameter Identification Method for Boost Converter Based on Modified Hybrid System Model

被引:0
作者
Ren L. [1 ]
Gong C. [1 ]
机构
[1] College of Automation Engineering, Nanjing University of Aeronautics & Astronautics, Nanjing, 211106, Jiangsu Province
来源
Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering | 2018年 / 38卷 / 22期
基金
中国国家自然科学基金;
关键词
Boost converter; Feature parameter extraction; Hybrid model; Model modification; Parameter identification; Prognostics and health management (PHM);
D O I
10.13334/j.0258-8013.pcsee.170746
中图分类号
学科分类号
摘要
The prognostics and health management (PHM) is of great significance to enhance the system reliability and improve the system maintainability. The wide use of power electronic equipment is now making the PHM technology for power electronics in urgent need. LC parameter identification method based on hybrid system model is an advanced implementation means due to its noninvasive way. However, the existing hybrid model is not fit for boost-derived converters for its ignorance of the suddenly-change in the diode current caused by switching actions. To solve this problem, a correction term was introduced to modify the existing model. In order to verify the modified model, a parameter identification method based on wavelet transform denoising and recursive least squares arithmetic was proposed. The proposed method was analyzed by simulation on Matlab/Simulink and validated by experimentation. The results show that the parameter identification accuracy is over 95%, which verifies the effectiveness of the modified model. © 2018 Chin. Soc. for Elec. Eng.
引用
收藏
页码:6647 / 6654
页数:7
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