为准确有效地对燃-燃联合动力(Combined gas turbine and gas turbine,COGAG)装置的运行特性和控制方法进行研究,设计了一种半物理仿真方法。建立了具备实时求解能力的燃气轮机模型作为代理模型,采用模型驱动电机的方法等效代替燃气轮机...为准确有效地对燃-燃联合动力(Combined gas turbine and gas turbine,COGAG)装置的运行特性和控制方法进行研究,设计了一种半物理仿真方法。建立了具备实时求解能力的燃气轮机模型作为代理模型,采用模型驱动电机的方法等效代替燃气轮机,将电机与传动装置及负载进行机械连接,组成半物理仿真试验台。对转子动力学特性相似原理进行研究,证明了半物理仿真方法的合理性。基于建立的试验台对COGAG系统的并车及负荷分配过程进行了研究,研究结果表明:设计的半物理仿真方法可以实现对COGAG系统的并车过程以及不同比例负荷分配过程的控制,当使两台燃气轮机各承担50%负荷时,双机功率的平均不平衡度为2.7%,验证了半物理仿真方法的有效性。展开更多
A series-parallel hydraulic hybrid system applied to public buses is put torwaro, ano parameters of key components are analyzed and determined. Energy management strategy based on logic thresh- old is designed which i...A series-parallel hydraulic hybrid system applied to public buses is put torwaro, ano parameters of key components are analyzed and determined. Energy management strategy based on logic thresh- old is designed which is aimed at efficient operation of the overall system considering the operational characteristic of the components and taking the curves of engine, hydraulic pump/motor and hydrau- lic pump as the main design basis; regenerative control strategy which makes regenerative brake sys- tem and frictional brake system work harmoniously is designed to raise recovery rate of regenerative brake energy. System dynamic modeling and simulation results show that the energy control strategy designed here is able to adapt system to changes of working condition and switch the operating mode reasonably. The regenerative braking control strategy is effective in raising the utilization of energy and improving fuel economy.展开更多
For a series plug-in hybrid electric vehicle,higher working efficiency can be achieved by the drive system with two small motors in parallel than that with one big motor alone.However,the overly complex structure will...For a series plug-in hybrid electric vehicle,higher working efficiency can be achieved by the drive system with two small motors in parallel than that with one big motor alone.However,the overly complex structure will inevitably lead to a substantial increase in the development cost.To improve the system price-performance ratio,a new kind of series-parallel hybrid system evolved from the series plug-in hybrid system is designed.According to the technical parameters of the selected components,the system model is established,and the vehicle dynamic property and pure electric drive economy are evaluated.Based on the dynamic programming,the energy management strategy for the drive system under the city driving cycle is developed,and the superiority validation of the system is completed.For the studied vehicle driven by the designed series-parallel plug-in hybrid system,compared with the one driven by the described series plug-in hybrid system,the dynamic property is significantly improved because of the multi-power coupling,and the fuel consumption is reduced by 11.4%with 10 city driving cycles.In a word,with the flexible configuration of the designed hybrid system and the optimized control strategy of the energy management,the vehicle performance can be obviously improved.展开更多
文摘为准确有效地对燃-燃联合动力(Combined gas turbine and gas turbine,COGAG)装置的运行特性和控制方法进行研究,设计了一种半物理仿真方法。建立了具备实时求解能力的燃气轮机模型作为代理模型,采用模型驱动电机的方法等效代替燃气轮机,将电机与传动装置及负载进行机械连接,组成半物理仿真试验台。对转子动力学特性相似原理进行研究,证明了半物理仿真方法的合理性。基于建立的试验台对COGAG系统的并车及负荷分配过程进行了研究,研究结果表明:设计的半物理仿真方法可以实现对COGAG系统的并车过程以及不同比例负荷分配过程的控制,当使两台燃气轮机各承担50%负荷时,双机功率的平均不平衡度为2.7%,验证了半物理仿真方法的有效性。
基金Supported by the National Natural Science Foundation of China(No.50875054)Weihai Science and Technology Development Plan Project(No.2012DXGJ13)
文摘A series-parallel hydraulic hybrid system applied to public buses is put torwaro, ano parameters of key components are analyzed and determined. Energy management strategy based on logic thresh- old is designed which is aimed at efficient operation of the overall system considering the operational characteristic of the components and taking the curves of engine, hydraulic pump/motor and hydrau- lic pump as the main design basis; regenerative control strategy which makes regenerative brake sys- tem and frictional brake system work harmoniously is designed to raise recovery rate of regenerative brake energy. System dynamic modeling and simulation results show that the energy control strategy designed here is able to adapt system to changes of working condition and switch the operating mode reasonably. The regenerative braking control strategy is effective in raising the utilization of energy and improving fuel economy.
基金supported by the National Natural Science Foundation of China(Grant No.51405259)China Postdoctoral Science Foundation funded project(Grant Nos.2014T70072&2013M530608)Colleges and Universities in Hebei Province Science and Technology Research Project(Grant No.QN2015056)
文摘For a series plug-in hybrid electric vehicle,higher working efficiency can be achieved by the drive system with two small motors in parallel than that with one big motor alone.However,the overly complex structure will inevitably lead to a substantial increase in the development cost.To improve the system price-performance ratio,a new kind of series-parallel hybrid system evolved from the series plug-in hybrid system is designed.According to the technical parameters of the selected components,the system model is established,and the vehicle dynamic property and pure electric drive economy are evaluated.Based on the dynamic programming,the energy management strategy for the drive system under the city driving cycle is developed,and the superiority validation of the system is completed.For the studied vehicle driven by the designed series-parallel plug-in hybrid system,compared with the one driven by the described series plug-in hybrid system,the dynamic property is significantly improved because of the multi-power coupling,and the fuel consumption is reduced by 11.4%with 10 city driving cycles.In a word,with the flexible configuration of the designed hybrid system and the optimized control strategy of the energy management,the vehicle performance can be obviously improved.
