Study Of Modeling, Control And Simulation For Hybrid Electric Vehicle Power Distribution System

In this dissertation, the hybrid electric vehicle power distribution system modeling, control and simulation are systematically studied.Today, the design of low energy consumption and low emissions vehicle can abate the pressure of energy absence and improve the quality of environment. Hybrid electric vehicles (HEV) represent one of the most promising fuel-saving technologies in the short-term for improving fuel economy of ground vehicles. Their viability has been amply demonstrated in a few successful commercial models. Among the common configurations, the power-split (i.e., combined parallel/series) configuration offers superior design and control flexibility and achieves highest overall efficiency. Therefore, most of the full-hybrid vehicles planned for the near future from Toyota, GM, Chrysler, and Ford are all split hybrids.In this dissertation, Common power distribution system configurations and power flow concepts are investigated in order to illustrate the important position that this research currently plays in the power-split HEVs. Next two ways in which the fuel consumption of a given vehicle may be reduced and control optimization analysis of power-split HEV are presented. An integrated dynamic model of the planetary gear train was first developed for power-split HEV power distribution system, from this simulation model, other detailed models of each of the key power distribution system components are constructed based on efficiency mapping and fuel consumption that have been scaled to fit the application. After the model of power split hybrid electric vehicles power distribution system is built, we next introduce a system level vehicle simulation methodology and an energy management strategy to minimize long term fuel consumption and maintain battery charge. The strategy consists of a control based upon drive modes with dynamic control of battery SOC was developed.Finally, the fuel economy on the FTP-95 (Federal Test Procedure) and US-06 (Supplemental Federal Test Procedure) driving cycles are simulated. Simulations results illustrate the potential of the proposed power distribution system and control in terms of fuel economy and in keeping the deviations of SOC at a low level, compared with Toyota Prius and the software ADVISOR developed by U.S. Department of Energy's National Renewable Energy Laboratory (NREL)'s similar dynamic performance, This power distribution system simulation methodology allows design engineers to study power distribution system configurations more scientifically and efficiently.