Power System Design And Parameter Optimization For Hybrid Electric Bus

Today's social environment, the growing energy crisis, with the increase in car ownership in China and the strengthening of environmental regulations, hybrid cars are more and more attention. Car with hybrid drive has become an internationally recognized address environmental, energy, and sustainable development strategy in effective ways. Countries around the world have invested huge human, material and financial resources developing hybrid vehicles. In this paper, parallel hybrid electric bus for the study, its power, economy were studied.We first work on the principle of hybrid systems analysis, selection applied to urban buses parallel hybrid system for the study. And the study of hybrid bus design the overall program, according to the engine, motor, drive system and super-capacitor matching parameters, initially set the parameters of each component.Based on system theory and practical application of combining the basic idea, in the ADVISOR software, set up parallel hybrid electric bus in the simulation model, some of the major components of the model include: engine model, permanent magnet synchronous motor model, super-capacitor model and vehicle dynamic model. In the model based on the simulation results show that the established power system model is theoretically correct, the actual development work to meet basic needs.Power system parameter optimization is to improve the power of hybrid cars, fuel economy the key. This article in the MATLAB environment, based on genetic algorithm parallel hybrid bus powertrain parameters were optimized, and with the traditional optimization ADVISOR simulation results are compared, results showed that the genetic algorithm for parallel hybrid bus powertrain performance optimization is reasonable, and has good practicability. The algorithm can simulate the vehicle to maximize the operational status of various operating conditions and the actual vehicle engineering constraints, under laboratory conditions, to achieve parallel hybrid bus powertrain performance optimization.Finally, the hybrid electric bus-like vehicle road tests described, a prototype vehicle fuel economy and meet the design requirements of both. Parallel hybrid power system performance car matching and optimization in the practical application of engineering development and design, proven in the laboratory using a relatively short time on the hybrid system performance matching and optimization is feasible, and save a lot of time, human, material and financial resources, not only for the development of hybrid cars in China but also for business product design and development, has important academic significance and application value.