中国电气工程学报（英文） ›› 2021, Vol. 7 ›› Issue (1): 27-36.doi: 10.23919/CJEE.2021.000002

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  • 收稿日期:2020-09-10 修回日期:2020-10-14 接受日期:2021-02-24 发布日期:2021-04-19

Review of General Modeling Approaches of Power Converters*

Dong Yan1, Chenglin Yang2, Lijun Hang1,*, Yuanbin He1, Ping Luo1, Lei Shen1, Pingliang Zeng1   

  1. 1. Department of Electrical Engineering, Hangzhou Dianzi University, Hangzhou 310000, China;
    2. INVT Power System(Shenzhen)Co., Ltd., Shenzhen 518055, China
  • Received:2020-09-10 Revised:2020-10-14 Accepted:2021-02-24 Published:2021-04-19
  • Contact: * E-mail: ljhang@hdu.edu.cn
  • About author:Dong Yan received his B.S. degree from the School of Electrical Engineering, Henan University of Technology, Zhengzhou, China, in 2018. He is currently working towards his Ph.D. degree at the School of College of Automation, Hangzhou Dianzi University, Hangzhou, China. His research interests include modeling and analysis of power electronic systems. Chenglin Yang is a senior engineer at INVT Power System (Shenzhen) Co., Ltd. His research interest is power electronics.He obtained his master degree in electrical engineering from Zhejiang University in 2004. Upon attaining his master degree, he joined Emerson Network Power Company, where he held a number of important positions as a software manager. In 2008,he joined Guangdong East Power Supply Company as R&D director where he led the team to achieve remarkable success. He joined INVT Power System (Shenzhen) Co., Ltd. As chief R&D engineer and deputy general manager in July 2010. He is mainly responsible for products development of UPS. Lijun Hang received the B.S. and Ph.D. degrees in electrical engineering from Zhejiang University, Hangzhou, China, in 2002 and 2008, respectively. From 2008 to 2011, she was a postdoctoral researcher with Zhejiang University. From 2011 to September 2013, she was a research assistant professor with CURENT, University of Tennessee, Knoxville, TN, USA. From 2013 to 2015, she was an associate professor at the Department of Electrical Engineering, Shanghai Jiao Tong University, Shanghai, China. Since 2015, she has been a professor at Hangzhou Dianzi University. Her research interests include digital control of power electronics for grid-connected converters, bidirectional DC-DC converters for microgrids, and renewable energy systems. She has authored or co-authored more than 110 published technical papers.Yuanbin He received the Ph.D. degree in electrical engineering from the City University of Hong Kong, Hong Kong, China, in 2017. He also worked as a research assistant with the City University of Hong Kong from April 2013 to August 2013, and also as a postdoctoral research fellow from February 2017 to July 2017. From July 2011 to March 2013, he worked as an associate researcher with Nanjing FSP-Powerland Technology Inc., Nanjing, China, where he has been involved in research and development of DC-DC and DC-AC converters. From February 2016 to June 2016, he was a visiting scholar at the University of Manitoba, Winnipeg, MB, Canada. Since May 2017, he has been with the Hangzhou Dianzi University, Hangzhou, China, where he is currently a research associate professor with the Department of Electrical Engineering and Automation. His current research interests include renewable energy-generation systems, power quality, and smart grids.Ping Luo received the B.S. and Ph.D. degrees in electrical engineering from Zhejiang University, Hangzhou, China, in 2000 and 2006, respectively. From 2014 to 2015, she was a research assistant professor with Carnegie Mellon University, USA. Since 2006, she has been an associate professor at Hangzhou Dianzi University. Her research interests include the energy Internet and smart grid, active distribution network optimization scheduling, and the engineering electromagnetic field inverse problem.Lei Shen received the B.S. degree and Ph.D. degree in electrical engineering from Zhejiang University, Hangzhou, China, in 2007 and 2012, respectively. From 2012 to 2014, he was a research fellow in the Department of Electrical and Electronic Engineering, The University of Nottingham, Nottingham, UK. He is currently a senior research fellow in the University of Nottingham, Zhejiang, China. His current research interests include the integration of power electronics with electric machines and power grids.Pingliang Zeng is a professor at Hangzhou Dianzi University, Hangzhou, China, and a national special expert. He is a Chartered Engineer (CEng), Fellow of the IET, senior member of IEEE, and a member of IEC TC122 and TC8.He obtained his bachelor and PhD degrees, both in electrical engineering, respectively from Huazhong University of Science and Technology, China, in1984, and Strathclyde University, UK, in 1990. Upon attaining doctorate degree, he joined National Grid Company (NGC), UK, where he held a number of important positions including system operator incentives and strategy manager, and network design manager.In 2012, he joined China Electric Power Research Institute as the chief expert in Power System Analysis and Planning, where he led a research team undertaking a number of key projects including National High Technology Development (“863” Plan), SGCC special projects, and key Sino-UK joint research projects funded by National Natural Science Foundation of China on integration of EV and energy storage in power systems. He joined Hangzhou Dianzi University in August 2017. He has published one book and about 100 academic papers.His current research interest includes power system planning under uncertainty, system operations, renewable energy integration, electric vehicle and energy storage, and multi-energy systems.
  • Supported by:
    * National Natural Science Foundation of China (51777049, 51707051).

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关键词: State-space average model, generalized average model, linearization techniques, averaged small-signal model, describing function method

Abstract: The modeling approaches of power converters occupy an important position in power electronic systems and have made considerable progress over the past years. Continuous modeling approaches and linearization techniques are reviewed, including the state-space average model, generalized average model, averaged small-signal model, and describing function method. A Buck converter with PWM modulation and voltage-mode control is taken as an example to compare the advantages and disadvantages of different methods through simulation analysis. Moreover, the corresponding equivalent circuit with an intuitive physical meaning of state-space average model, generalized average model, and averaged small-signal model is given. The results point out that the generalized average model can improve the modeling accuracy based on the state-space average model. In the linearization techniques, the averaged small-signal model reflects accuracy at low frequencies, but introduces phase lag in the high-frequency region. The describing function method is derived from harmonic linearization, which takes into account the sideband effect and improves the modeling accuracy at high frequencies.

Key words: State-space average model, generalized average model, linearization techniques, averaged small-signal model, describing function method