1. Power sources coordination through multivariable linear parameter‐varying/ H∞ control with application to multi‐source electric vehicles.
- Author
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Nwesaty, Waleed, Iuliana Bratcu, Antoneta, and Sename, Olivier
- Abstract
In this study, the problem of multi‐source power sharing strategy within electric vehicles is considered. Three different kinds of power sources – fuel cell, battery and supercapacitor – compose the power supply system, where all sources are current‐controlled and paralleled together with their associated DC–DC converters on a common DC link. The DC‐link voltage must be regulated regardless of load variations corresponding to the driving cycle. The proposed strategy is a robust control solution using a multiple‐input multiple‐output linear parameter‐varying (LPV)/ H∞; controller which provides the three current references with respect to source frequency characteristics. The selection of the weighting functions is guided by a genetic algorithm whose optimisation criterion expresses the frequency separation requirements. A reduced‐order version of the LPV / H∞ controller is also proposed to handle an embedded implementation with limited computational burden. The non‐linear multi‐source system is simulated in MATLAB ®/Simulink ® using two different types of driving cycles: the driving cycle of IFSTTAR (Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux) and a constant load profile used in order to illustrate system steady‐state behaviour. Simulation results show good performance in supplying the load at constant DC‐link voltage according to user‐configured frequency‐separation power sharing strategy. When assessed against the classical‐proportional–integral‐based filtering strategy taken as base‐line, the proposed strategy offers the possibility of integrating a variety of constraints into a systematic design procedure, whose result guarantees stability and performance robustness. [ABSTRACT FROM AUTHOR]
- Published
- 2016
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