Low-pass filtered power-flow control in series hybrid electric vehicle

This paper presents a low-pass filtered power-flow control strategy for a series hybrid electric vehicle (S-HEV) with an energy buffer. The proposed control aims to decrease the maximum power values from the primary energy source and, secondly, to reduce the engine-generator dynamics at sudden load changes (from low loads at low speed to high loads). In case of variable speed diesel generator (VSDG) set downsizing reduces the emissions and the fuel consumption. The proposed control strategy is introduced with two different driving cycles, both, for the urban and the sub-urban areas. The energy losses, caused by the energy buffering, and the sizing of heavy duty vehicle's series hybrid drive train are gained as a result