Stability analysis of the shunt regulator with nonlinear controller in PCU based on describing function method

Li, H, Wang, S, Lu, J, You, X and Yu, X 2017, 'Stability analysis of the shunt regulator with nonlinear controller in PCU based on describing function method', IEEE Transactions on Industrial Electronics, vol. 64, no. 3, 7727999, pp. 2044-2053.


Document type: Journal Article
Collection: Journal Articles

Title Stability analysis of the shunt regulator with nonlinear controller in PCU based on describing function method
Author(s) Li, H
Wang, S
Lu, J
You, X
Yu, X
Year 2017
Journal name IEEE Transactions on Industrial Electronics
Volume number 64
Issue number 3
Article Number 7727999
Start page 2044
End page 2053
Total pages 9
Publisher Institute of Electrical and Electronics Engineers
Abstract The shunt regulator is a key part of the power conditioning unit, which is becoming more and more important in the spacecrafts. Due to the nonlinear link, the switch operating with hysteresis control, the shunt regulator is a nonlinear system; however, the stability analysis method for the system is still grounded on the approximate linearization method, which neglects some of the ac and dc characteristics. In this paper, a novel stability analysis method for the nonlinear systems is proposed based on the describing function, which can be used to model the nonlinear link in the shunt regulator system. Further, the different conclusion of the shunt regulator system stability are drawn, by the approximate linearization method and the stability analysis method proposed in this paper, respectively. Finally, the simulation and experimental results prove the correctness of the stability analysis method with describing function and discover the incompletion of the approximate linearization methods on the stability analysis. Therefore, this paper provides a new way to analyze the stability of the nonlinear systems.
Subject Information and Computing Sciences not elsewhere classified
Keyword(s) Describing function (DF)
hysteresis control
nonlinear system
power conditioning unit (PCU)
stability
DOI - identifier 10.1109/TIE.2016.2623579
ISSN 0278-0046
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