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Engine On/Off Control for the Energy Management of a Serial Hybrid Electric Bus via Convex Optimization

Philipp Elbert ; Tobias Nüesch ; Andreas Ritter ; Nikolce Murgovski (Institutionen för signaler och system, Mekatronik) ; Lino Guzzella
IEEE Transactions on Vehicular Technology (0018-9545). Vol. 63 (2014), 8, p. 3549-3559.
[Artikel, refereegranskad vetenskaplig]

Convex optimization has recently been suggested for solving the optimal energy management problem of hybrid electric vehicles. Compared to dynamic programming, this approach can significantly reduce the computational time, but the price to pay are additional model approximations and heuristics for discrete decision variables such as engine on/off control. In this paper, the globally optimal engine on/off conditions are derived analytically. It is demonstrated that the optimal engine on/off strategy is to switch the engine on if and only if the requested power exceeds a certain non-constant threshold. By iteratively computing the threshold and the power split using convex optimization, the optimal solution to the energy management problem is found. The effectiveness of the presented approach is demonstrated in two sizing case studies. The first case study deals with high energy capacity batteries, while the second case study deals with supercapacitors that have much lower energy capacity. In both cases, the proposed algorithm yields optimal results much faster than the dynamic programming algorithm.

Nyckelord: Convex optimization; energy management; hybrid vehicles; sizing

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Denna post skapades 2014-03-21. Senast ändrad 2015-07-28.
CPL Pubid: 195408


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Institutioner (Chalmers)

Institutionen för signaler och system, Mekatronik (2005-2017)


Hållbar utveckling
Optimeringslära, systemteori

Chalmers infrastruktur