This paper looks at the heavy-haul combined train composed of different types of locomotives and its distributed power control system with a combination of 800 MHz and TD-LTE wireless communication.It analyses some ke...This paper looks at the heavy-haul combined train composed of different types of locomotives and its distributed power control system with a combination of 800 MHz and TD-LTE wireless communication.It analyses some key characteristic parameters that affect the synchronism and communication of the differential wireless multi-traction synchronous control systems for heavy-haul combined trains.At the same time,in order to reduce the latency of instruction and information transfer between different types of locomotives,improve the time-limit certainty of wireless transmission and optimize the control quality of multi-traction control systems for heavy-haul combined trains,a synchronism optimization strategy based on the Markov decision process on the basis of Petri networkconstruction is proposed.Relevant experiments and tests are carried out to verify the effectiveness of the synchronism optimization of the control system,which provides a guarantee for improving the differential wireless multi-traction synchronous control system for combined trains and optimizing train control.展开更多
随着我国风电装机容量与高速铁路运营里程不断增长,部分地区出现风电场与电气化铁路共同接入电网公共连接点(point of common coupling,PCC)的情况,将会引发一系列谐波不稳定问题。针对此类问题,对风电场与多车接入牵引网耦合系统进行...随着我国风电装机容量与高速铁路运营里程不断增长,部分地区出现风电场与电气化铁路共同接入电网公共连接点(point of common coupling,PCC)的情况,将会引发一系列谐波不稳定问题。针对此类问题,对风电场与多车接入牵引网耦合系统进行稳定性研究(为便于阐述,将牵引变电所、接触网与列车视为一个整体,称为牵引供电系统),建立了电网-牵引供电系统-风电场耦合系统导纳模型,并结合阻抗扫频验证了模型的准确性。接着分析了传输线路长度对电网-牵引供电系统-风电场耦合系统谐波稳定性的影响,并基于风电场、牵引供电系统的导纳Bode图进一步揭示了风电场和牵引供电系统交互影响的产生机理,并探究了耦合系统临界稳定时机车数量与风机数量比例条件。最后,基于Matlab/Simulink仿真和Starsim/HIL硬件在环仿真平台,验证了所建模型对电网-牵引供电系统-风电场耦合系统谐波不稳定现象研究的有效性和正确性。展开更多
针对电动拖拉机牵引作业能量利用率低、速度稳定性不足等问题,本文提出一种基于四电机双耦合动力系统(Four-motor dual-coupled power system,FDPS)的节能控制方法。FDPS兼具前后桥分布式驱动与单桥轴耦合驱动特点,支持单电机、双电机...针对电动拖拉机牵引作业能量利用率低、速度稳定性不足等问题,本文提出一种基于四电机双耦合动力系统(Four-motor dual-coupled power system,FDPS)的节能控制方法。FDPS兼具前后桥分布式驱动与单桥轴耦合驱动特点,支持单电机、双电机、三电机及四电机多驱动模式。建立作业机组纵向动力学模型和轮胎-土壤互作模型,以及能够表征FDPS效率特性与动力特性的电机模型与传动系统模型。提出一种与牵引作业负载匹配的多驱动模式节能控制架构,上层基于混合罚函数粒子群算法,针对不同需求驱动力与作业速度,离线生成FDPS驱动模式切换与多电机最优转矩分配规则;下层结合模糊PID算法在线精准识别整机需求驱动力,并跟踪目标作业速度。基于田间实测牵引阻力数据开展900 s的节能控制台架试验。试验结果表明,所提方法较平均转矩分配控制策略电能消耗降低3.76%,速度均方根误差减少11.1%,提高了整机作业经济性和速度稳定性。本文所提动力系统可作为通用动力平台,所提节能控制方法可为电动拖拉机多动力源驱动控制研究提供参考。展开更多
基金supported by National Key R&D Programof China(Grand No.2017YFB1201302-13).
文摘This paper looks at the heavy-haul combined train composed of different types of locomotives and its distributed power control system with a combination of 800 MHz and TD-LTE wireless communication.It analyses some key characteristic parameters that affect the synchronism and communication of the differential wireless multi-traction synchronous control systems for heavy-haul combined trains.At the same time,in order to reduce the latency of instruction and information transfer between different types of locomotives,improve the time-limit certainty of wireless transmission and optimize the control quality of multi-traction control systems for heavy-haul combined trains,a synchronism optimization strategy based on the Markov decision process on the basis of Petri networkconstruction is proposed.Relevant experiments and tests are carried out to verify the effectiveness of the synchronism optimization of the control system,which provides a guarantee for improving the differential wireless multi-traction synchronous control system for combined trains and optimizing train control.
文摘随着我国风电装机容量与高速铁路运营里程不断增长,部分地区出现风电场与电气化铁路共同接入电网公共连接点(point of common coupling,PCC)的情况,将会引发一系列谐波不稳定问题。针对此类问题,对风电场与多车接入牵引网耦合系统进行稳定性研究(为便于阐述,将牵引变电所、接触网与列车视为一个整体,称为牵引供电系统),建立了电网-牵引供电系统-风电场耦合系统导纳模型,并结合阻抗扫频验证了模型的准确性。接着分析了传输线路长度对电网-牵引供电系统-风电场耦合系统谐波稳定性的影响,并基于风电场、牵引供电系统的导纳Bode图进一步揭示了风电场和牵引供电系统交互影响的产生机理,并探究了耦合系统临界稳定时机车数量与风机数量比例条件。最后,基于Matlab/Simulink仿真和Starsim/HIL硬件在环仿真平台,验证了所建模型对电网-牵引供电系统-风电场耦合系统谐波不稳定现象研究的有效性和正确性。
文摘针对电动拖拉机牵引作业能量利用率低、速度稳定性不足等问题,本文提出一种基于四电机双耦合动力系统(Four-motor dual-coupled power system,FDPS)的节能控制方法。FDPS兼具前后桥分布式驱动与单桥轴耦合驱动特点,支持单电机、双电机、三电机及四电机多驱动模式。建立作业机组纵向动力学模型和轮胎-土壤互作模型,以及能够表征FDPS效率特性与动力特性的电机模型与传动系统模型。提出一种与牵引作业负载匹配的多驱动模式节能控制架构,上层基于混合罚函数粒子群算法,针对不同需求驱动力与作业速度,离线生成FDPS驱动模式切换与多电机最优转矩分配规则;下层结合模糊PID算法在线精准识别整机需求驱动力,并跟踪目标作业速度。基于田间实测牵引阻力数据开展900 s的节能控制台架试验。试验结果表明,所提方法较平均转矩分配控制策略电能消耗降低3.76%,速度均方根误差减少11.1%,提高了整机作业经济性和速度稳定性。本文所提动力系统可作为通用动力平台,所提节能控制方法可为电动拖拉机多动力源驱动控制研究提供参考。
