TY - JOUR
T1 - Bifurcation Analysis of a Current-Mode-Controlled DC Cascaded System and Applications to Design
AU - Ding, Li
AU - Wong, Siu Chung
AU - Tse, Chi K.
N1 - Funding Information:
Manuscript received September 10, 2019; revised November 20, 2019 and December 27, 2019; accepted December 30, 2019. Date of publication January 8, 2020; date of current version November 5, 2020. This work was supported by Hong Kong Research Grant Council through General Research Fund under Grant 152096/17E. Recommended for publication by Associate Editor Jonathan W. Kimball. (Corresponding author: Li Ding.) Li Ding and Siu-Chung Wong are with the Department of Electronic and Information Engineering, The Hong Kong Polytechnic University, Hong Kong (e-mail: kenny.ding@connect.polyu.hk; enscwong@polyu.edu.hk).
Publisher Copyright:
© 2013 IEEE.
PY - 2020/12
Y1 - 2020/12
N2 - 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.
AB - 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.
KW - Border collision bifurcation
KW - dc distributed system
KW - fast-scale instability
KW - slow-scale instability
UR - http://www.scopus.com/inward/record.url?scp=85096032768&partnerID=8YFLogxK
U2 - 10.1109/JESTPE.2020.2964818
DO - 10.1109/JESTPE.2020.2964818
M3 - Journal article
AN - SCOPUS:85096032768
SN - 2168-6777
VL - 8
SP - 3214
EP - 3224
JO - IEEE Journal of Emerging and Selected Topics in Power Electronics
JF - IEEE Journal of Emerging and Selected Topics in Power Electronics
IS - 4
M1 - 8952640
ER -