Modelling and Optimization of Energy Range Extended Electric Bus Strategy Management System Using Dynamic Programming Gunawan D. Haryadi (a*), Septian N.I. Pramaishella (a), Ismoyo Haryanto (a), Sigit P. Santosa (b)
a)Department of Mechanical Engineering Diponegoro University *gunawan_dh[at]ft.undip.ac.id
b) Department of Mechanical and Aerospace Engineering Bandung Institute of Technology Bandung, Indonesia
The number of motor vehicle increases at each year in Indonesia involve much negative impact on human life such as traffic jam. People choose to go by bus to avoid the traffic jam. Another negative impact is an increase amount of carbon dioxide (CO2) emissions in the air. Replacing motor vehicle to electric vehicle is the better way to decrease amount of carbon dioxide emissions. Range extended electric bus is a type of electric bus which use electric and fuel for energy source. On the basis of a typical Japanese driving cycle, optimal control strategy is designed according to the state of charge (SOC) consumption trend, which is optimized by the dynamic programming (DP) algorithm. The SOC value determines the mileage and fuel consumption, it will be the main goal of energy management. The result show that when REEB go through distance as long as the distance of BRT UNDIP – UNNES bus route, the amount of Japanese driving cycle are 11 cycles. The energy and fuel consumption that optimized by DP strategy can reach 121.66 MJ and 0.0143 L/Km. Compared with the conventional bus, the fuel consumption reach 0.212 L/Km. The overarching objectives of this paper are to get the REEB energy management strategy model based on dynamic programming, to get the results of optimization of REEB fuel consumption based on dynamic programming, and REEB energy flow.
Keywords: range extended electric bus, state of charge, dynamic programming, fuel consumption, and energy management