Power buffer with model predictive control for stability of vehicular power systems with constant power loads

Zhang, Xinan, Vilathgamuwa, D. Mahinda, Tseng, King-Jet, Bhangu, Bikramjit Singh, & Gajanayake, Chandana Jayampathi (2013) Power buffer with model predictive control for stability of vehicular power systems with constant power loads. IEEE Transactions on Power Electronics, 28(12), pp. 5804-5812.

View at publisher


Electrification of vehicular systems has gained increased momentum in recent years with particular attention to constant power loads (CPLs). Since a CPL potentially threatens system stability, stability analysis of hybrid electric vehicle with CPLs becomes necessary. A new power buffer configuration with battery is introduced to mitigate the effect of instability caused by CPLs. Model predictive control (MPC) is applied to regulate the power buffer to decouple source and load dynamics. Moreover, MPC provides an optimal tradeoff between modification of load impedance, variation of dc-link voltage and battery current ripples. This is particularly important during transients or starting of system faults, since battery response is not very fast. Optimal tradeoff becomes even more significant when considering low-cost power buffer without battery. This paper analyzes system models for both voltage swell and voltage dip faults. Furthermore, a dual mode MPC algorithm is implemented in real time offering improved stability. A comprehensive set of experimental results is included to verify the efficacy of the proposed power buffer.

Impact and interest:

14 citations in Scopus
Search Google Scholar™
9 citations in Web of Science®

Citation counts are sourced monthly from Scopus and Web of Science® citation databases.

These databases contain citations from different subsets of available publications and different time periods and thus the citation count from each is usually different. Some works are not in either database and no count is displayed. Scopus includes citations from articles published in 1996 onwards, and Web of Science® generally from 1980 onwards.

Citations counts from the Google Scholar™ indexing service can be viewed at the linked Google Scholar™ search.

ID Code: 72263
Item Type: Journal Article
Refereed: Yes
Keywords: Battery energy storage, Constant power instability, Model predictive control (MPC), Power buffer
DOI: 10.1109/TPEL.2012.2233761
ISSN: 1941-0107
Divisions: Current > Schools > School of Electrical Engineering & Computer Science
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: Copyright 2013 Institute of Electrical and Electronics Engineers
Deposited On: 01 Jun 2014 22:45
Last Modified: 03 Jun 2014 22:50

Export: EndNote | Dublin Core | BibTeX

Repository Staff Only: item control page