Bifurcation Analysis of a Current-Mode-Controlled DC Cascaded System and Applications to Design
Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review
Author(s)
Related Research Unit(s)
Detail(s)
Original language | English |
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Article number | 8952640 |
Pages (from-to) | 3214-3224 |
Journal / Publication | IEEE Journal of Emerging and Selected Topics in Power Electronics |
Volume | 8 |
Issue number | 4 |
Online published | 8 Jan 2020 |
Publication status | Published - Dec 2020 |
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Abstract
In an electrical system, dc-dc converters are the major constituents that control the power flow among various terminals including power sources, buses, and loadings. Stability of these constituent converters under all operating conditions is vital to the operation of the electrical system. In this article, a simple dc cascaded system consisting of two cascading averaged current-mode-controlled dc-dc converters is considered. Application of the impedance criteria allows fast and decoupled design of a stable cascaded system. However, the usual impedance criteria fail to predict the stability of the system correctly. Slow-scale instability has been observed from full-circuit simulations, discrete-Time analysis, and experimental measurements. The complex behavior caused by the slow-scale instability such as border collision has been analyzed in depth based on the discrete-Time model. Stability boundaries are derived in practical parameter space. Finally, effective methods for ensuring the stable design of current-mode-controlled cascaded dc converter systems are discussed.
Research Area(s)
- Border collision bifurcation, dc distributed system, fast-scale instability, slow-scale instability
Citation Format(s)
Bifurcation Analysis of a Current-Mode-Controlled DC Cascaded System and Applications to Design. / Ding, Li; Wong, Siu-Chung; Tse, Chi K.
In: IEEE Journal of Emerging and Selected Topics in Power Electronics, Vol. 8, No. 4, 8952640, 12.2020, p. 3214-3224.
In: IEEE Journal of Emerging and Selected Topics in Power Electronics, Vol. 8, No. 4, 8952640, 12.2020, p. 3214-3224.
Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review