Transactions of China Electrotechnical Society  2016, Vol. 31 Issue (9): 92-100    DOI:
Current Issue| Next Issue| Archive| Adv Search |
A Dual Closed Loop Control Strategy of the Multi-Level Rectifier Using Capacitor Energy as the Outer Loop Variable
Ni Shuangwu1,2, Su Jianhui1
1.Energy Research Institute of Hefei University of Technology Hefei 230009 China
2.School of Electrical Engineering and Automation Anhui University Hefei 230039 China

Download: PDF (2553 KB)   HTML (1 KB) 
Export: BibTeX | EndNote (RIS)      
Abstract  On the basis of analyzing the mathematical model of three-level rectifiers and the theory of instantaneous power,an energy-current dual closed loop control strategy is proposed in this paper.By analyzing the instantaneous power of the system,the relationship of the power and the DC voltage can be found.Thus the energy storage of the DC bus capacitor can be taken as the controlling variable of the outer loop to regulate the DC voltage indirectly.In order to control the active current and the reactive current independently,the current feed-forward decoupling method is adopted by the inner current loop.Parameters of the energy-current loops are also designed in this paper.The SPWM modulation strategy based on the zero-sequence voltage component injection is adopted for balancing the neutral-point-potential of the three-level rectifier.Correctness of the theoretical analysis is proved by the experiment.By comparing the results of the energy-current control strategy and the voltage-current control strategy,the former demonstrates better dynamic performance.
Key wordsThree-level rectifier      square of voltage      current feed-forward decoupling control      double loop control      zero-sequence     
Received: 04 March 2015      Published: 07 July 2016
PACS: TM461  
Service
E-mail this article
Add to my bookshelf
Add to citation manager
E-mail Alert
RSS
Articles by authors
Ni Shuangwu
Su Jianhui
Cite this article:   
Ni Shuangwu,Su Jianhui. A Dual Closed Loop Control Strategy of the Multi-Level Rectifier Using Capacitor Energy as the Outer Loop Variable[J]. Transactions of China Electrotechnical Society, 2016, 31(9): 92-100.
URL:  
https://dgjsxb.ces-transaction.com/EN/     OR     https://dgjsxb.ces-transaction.com/EN/Y2016/V31/I9/92
Copyright © Transactions of China Electrotechnical Society
Supported by: Beijing Magtech