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.
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.
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|Item Type:||Journal Article|
|Keywords:||Battery energy storage, Constant power instability, Model predictive control (MPC), Power buffer|
|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|
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