Analysis and comparison of optimal power management strategies for a series plug-in hybrid school bus via dynamic programming Online publication date: Fri, 20-Nov-2015
by Wei Zhou; Chengning Zhang; Junqiu Li
International Journal of Vehicle Design (IJVD), Vol. 69, No. 1/2/3/4, 2015
Abstract: This paper examines two optimal power management strategies, i.e., blending (BL) strategy and charge-depleting/charge-sustaining (CD/CS) strategy, for a series plug-in school bus. The minimum fuel consumption results of these two strategies are compared and the pattern of the globally optimal battery state of charge (SoC) trajectories is analysed. Dynamic programming (DP) approach which is able to achieve global optimisation is applied in this study to guarantee a fair comparison. More specifically, to overcome interpolation leakage in traditional DP algorithms, a level-set algorithm is utilised. Simulation results show that: 1) The globally optimal way to control is to linearly deplete the battery SoC to its minimum allowable value when the vehicle reaches to the end of the journey; 2) The difference between the optimal fuel economy that can be achieved by the BL and CD/CS strategies is very marginal for a series plug-in powertrain, which is in the order of 1-2%.
Existing subscribers:
Go to Inderscience Online Journals to access the Full Text of this article.
If you are not a subscriber and you just want to read the full contents of this article, buy online access here.Complimentary Subscribers, Editors or Members of the Editorial Board of the International Journal of Vehicle Design (IJVD):
Login with your Inderscience username and password:
Want to subscribe?
A subscription gives you complete access to all articles in the current issue, as well as to all articles in the previous three years (where applicable). See our Orders page to subscribe.
If you still need assistance, please email subs@inderscience.com
Our Blog 
Follow us on Twitter 
Visit us on Facebook