直流牵引供电系统回流安全关键技术研究
发布时间：2019-07-10 10:35
【摘要】：城市轨道交通线路一般采用直流牵引供电系统为列车提供电能。直流牵引供电系统动态运行过程中,普遍存在钢轨电位、杂散电流等回流安全参数异常升高问题,对系统自身及周边埋地金属管线运行安全造成严重危害。目前,我国正处于城市轨道交通快速发展阶段,保证直流牵引供电系统运行安全具有重要研究意义。本文以直流牵引供电系统回流安全为研究对象,对回流安全参数仿真方法、回流安全参数异常升高机理及系统运行优化控制方法进行研究。本文针对直流牵引供电系统特性及回流安全参数特征开展研究。分析系统整流机组稳态调节特性,建立其多折线输出特性曲线。阐述回流系统分布参数与集中参数共存的混合参数特点,分析回流安全参数治理设备动作特性。建立列车牵引计算模型及再生制动能量吸收装置模型,仿真分析系统负荷变化特性。建立单区间供电下回流安全参数分布模型,理论分析单区间供电模型下回流安全参数分布规律,对比实际系统回流安全参数异常分布现象,阐明现有模型及理论无法有效仿真、控制回流安全参数异常升高问题。针对回流安全参数仿真方法,本文提出系统复杂运行工况下回流安全参数快速仿真模型,实现回流安全参数的快速、精确计算。建立回流系统混合参数模型等效及参数修正方法,实现回流系统模型精确等效。提出直流牵引供电系统统一链式电路模型,并基于该模型研究系统复杂运行工况下潮流计算方法。建立回流安全参数计算模型,基于潮流分布实现回流安全参数计算。针对系统交流侧网压对直流侧潮流影响,基于交替迭代法进行系统交直流潮流计算。仿真分析与实例验证结果表明,回流安全参数快速仿真方法可实现系统复杂工况下回流安全参数分析。同时,系统多牵引变电所多列车并列运行时广泛存在功率越区分配现象。本文针对回流安全参数异常升高机理开展研究。建立系统牵引电流越区传输与回流安全参数关联模型,分析两者关联变化规律。提出直流牵引供电系统潮流追踪解析计算方法,实现了系统多牵引所多列车运行时的功率分配计算。提出电流分配系数下回流安全参数分解方法,实现各电流分配分量对回流安全参数的影响分析。根据实际线路参数,仿真分析了系统功率分配对回流安全参数异常升高的影响,阐释实际系统回流安全参数异常升高机理。仿真分析了列车运行功率重合度及再生制动能量吸收启动阈值调节对回流安全参数的控制作用。通过现场实测分析,验证了系统功率越区分配对回流安全参数影响。本文针对再生制动能量优化管理的回流安全参数控制方法开展研究。阐述系统节能运行过程与回流安全参数关系,对比分析再生制动能量分配计算方法。提出系统再生制动能量管理优化目标与优化模型,实现系统回流安全与节能的综合优化控制。提出再生制动能量管理优化模型求解的改进混沌粒子群算法,引入混沌理论及动态惯性权重思想,避免寻优过程过早收敛,并提高寻优速度。实例分析结果表明,本文提出的再生制动能量优化管理方法在实现回流安全的基础上,可有效降低系统运行损耗。本文针对能馈型直流牵引供电系统回流安全及节能运行开展研究。建立了能馈型直流牵引供电系统双向变流机组潮流模型,实现系统交直流潮流计算接口的建模。提出了基于系统双向变流器供电的回流安全及节能运行解决方案,仿真分析了系统回流安全参数分布及能量损耗。分析结果表明双向变流器供电方式可有效实现系统供电自分区,控制系统功率越区分配,降低回流安全参数及系统损耗。设计了直流牵引供电系统2MW三电平双向变流器,通过现场实验验证了其输出特性。
文内图片：
图片说明：直流牵引供电系统钢轨电位与杂散电流示意图
[Abstract]:The urban rail traffic line generally uses the direct current traction power supply system to provide electric energy for the train. During the dynamic operation of the direct current traction power supply system, the problem of abnormal rise of the return safety parameters such as rail potential and stray current is common, and the operation safety of the system itself and the surrounding buried metal pipeline is seriously endangered. At present, China is in the rapid development stage of urban rail transit, and it is of great significance to ensure the operation safety of DC traction power supply system. In this paper, the return safety of the DC traction power supply system is the research object, and the simulation method of the return flow safety parameters, the abnormal raising mechanism of the return safety parameter and the control method of the system operation are studied. In this paper, the characteristics of the DC traction power supply system and the characteristics of the return safety parameters are studied. The steady state regulation characteristic of the rectifier unit of the system is analyzed, and the output characteristic curve of the multi-fold line is established. The characteristics of the mixed parameters of the distribution parameters of the reflux system and the co-existence of the lumped parameters are described, and the operating characteristics of the control equipment for the return safety parameters are analyzed. A train traction calculation model and a regenerative braking energy absorption device model are established to simulate and analyze the load change characteristics of the system. The distribution model of the return safety parameter under the single-section power supply is established, the distribution of the return safety parameters under the single-section power supply model is analyzed, the abnormal distribution of the return safety parameters of the actual system is compared, the existing model and the theory cannot be effectively simulated, And the problem of abnormal rise of the reflux safety parameter is controlled. According to the simulation method of the return flow safety parameter, this paper presents a fast simulation model of the return safety parameters under the complex operating conditions of the system, and the fast and accurate calculation of the return safety parameters is realized. The equivalent and parameter correction method of the mixed parameter model of the reflux system is established, and the exact equivalent of the model of the reflux system is realized. The unified chain circuit model of DC traction power supply system is put forward, and the method of power flow calculation under complex operating conditions of the system is studied. And a reflux safety parameter calculation model is established, and the reflux safety parameter calculation is realized based on the power flow distribution. In view of the influence of the system AC side network pressure on the flow of the DC side, the AC/ DC power flow calculation is carried out on the basis of the alternative iteration method. The simulation analysis and the example verification result show that the rapid simulation method of the return flow safety parameter can realize the analysis of the return safety parameters under the complex working conditions of the system. At the same time, there is a wide range of power handover in the multi-train parallel operation of the multi-traction substation in the system. In this paper, the mechanism of abnormal rise of reflux safety parameters is studied. The correlation model of the system traction current handoff and the return safety parameter is established, and the association rule of the two parameters is analyzed. The calculation method of the power flow tracing and analysis of the direct current traction power supply system is put forward, and the power distribution calculation in the multi-traction of the system is realized. The method for decomposing the return flow safety parameter under the current distribution coefficient is put forward, and the influence of each current distribution component on the return safety parameter is realized. Based on the actual line parameters, the influence of the system power distribution on the abnormal rise of the return safety parameters is analyzed, and the mechanism of the abnormal increase of the return safety parameter of the actual system is explained. The simulation and analysis of the operation power coincidence degree and the regenerative braking energy absorption start-up threshold adjust the control effect on the return safety parameters. The effect of system power handoff on the security parameters of the return flow is verified through the on-site measurement and analysis. In this paper, the method of return safety parameter control for regenerative braking energy optimization management is studied. The relationship between the energy-saving operation process and the return safety parameter of the system is described, and the calculation method of regenerative braking energy distribution is compared. The optimal objective and optimization model of the system regenerative braking energy management are put forward, and the comprehensive optimization control of the system return safety and energy saving is realized. In this paper, an improved hybrid particle swarm optimization algorithm for regenerative braking energy management optimization model is proposed, which is introduced into the theory of mixing and dynamic inertia weight, so as to avoid the premature convergence of the optimization process and to improve the optimization speed. The results of the example show that the regenerative braking energy optimization management method proposed in this paper can effectively reduce the running loss of the system on the basis of realizing the return flow safety. This paper studies the return safety and energy-saving operation of the energy-fed direct-current traction power supply system. The power flow model of the two-way converter unit of the energy-feed type DC traction power supply system is established, and the modeling of the AC/ DC power flow calculation interface is realized. The return safety and energy-saving operation solution based on the power supply of the two-way converter of the system are put forward, and the distribution and energy loss of the system return safety parameters are simulated and analyzed. The results show that the two-way converter power supply mode can effectively realize the self-zoning of the system power supply, the power hand-off of the control system, and reduce the return flow safety parameter and the system loss. The 2 MW three-level two-way converter of DC traction power supply system is designed, and its output characteristics are verified by field experiment.
【学位授予单位】：中国矿业大学
【学位级别】：博士
【学位授予年份】：2017
【分类号】：U223.6
，
本文编号：2512548
文内图片：
图片说明：直流牵引供电系统钢轨电位与杂散电流示意图
[Abstract]:The urban rail traffic line generally uses the direct current traction power supply system to provide electric energy for the train. During the dynamic operation of the direct current traction power supply system, the problem of abnormal rise of the return safety parameters such as rail potential and stray current is common, and the operation safety of the system itself and the surrounding buried metal pipeline is seriously endangered. At present, China is in the rapid development stage of urban rail transit, and it is of great significance to ensure the operation safety of DC traction power supply system. In this paper, the return safety of the DC traction power supply system is the research object, and the simulation method of the return flow safety parameters, the abnormal raising mechanism of the return safety parameter and the control method of the system operation are studied. In this paper, the characteristics of the DC traction power supply system and the characteristics of the return safety parameters are studied. The steady state regulation characteristic of the rectifier unit of the system is analyzed, and the output characteristic curve of the multi-fold line is established. The characteristics of the mixed parameters of the distribution parameters of the reflux system and the co-existence of the lumped parameters are described, and the operating characteristics of the control equipment for the return safety parameters are analyzed. A train traction calculation model and a regenerative braking energy absorption device model are established to simulate and analyze the load change characteristics of the system. The distribution model of the return safety parameter under the single-section power supply is established, the distribution of the return safety parameters under the single-section power supply model is analyzed, the abnormal distribution of the return safety parameters of the actual system is compared, the existing model and the theory cannot be effectively simulated, And the problem of abnormal rise of the reflux safety parameter is controlled. According to the simulation method of the return flow safety parameter, this paper presents a fast simulation model of the return safety parameters under the complex operating conditions of the system, and the fast and accurate calculation of the return safety parameters is realized. The equivalent and parameter correction method of the mixed parameter model of the reflux system is established, and the exact equivalent of the model of the reflux system is realized. The unified chain circuit model of DC traction power supply system is put forward, and the method of power flow calculation under complex operating conditions of the system is studied. And a reflux safety parameter calculation model is established, and the reflux safety parameter calculation is realized based on the power flow distribution. In view of the influence of the system AC side network pressure on the flow of the DC side, the AC/ DC power flow calculation is carried out on the basis of the alternative iteration method. The simulation analysis and the example verification result show that the rapid simulation method of the return flow safety parameter can realize the analysis of the return safety parameters under the complex working conditions of the system. At the same time, there is a wide range of power handover in the multi-train parallel operation of the multi-traction substation in the system. In this paper, the mechanism of abnormal rise of reflux safety parameters is studied. The correlation model of the system traction current handoff and the return safety parameter is established, and the association rule of the two parameters is analyzed. The calculation method of the power flow tracing and analysis of the direct current traction power supply system is put forward, and the power distribution calculation in the multi-traction of the system is realized. The method for decomposing the return flow safety parameter under the current distribution coefficient is put forward, and the influence of each current distribution component on the return safety parameter is realized. Based on the actual line parameters, the influence of the system power distribution on the abnormal rise of the return safety parameters is analyzed, and the mechanism of the abnormal increase of the return safety parameter of the actual system is explained. The simulation and analysis of the operation power coincidence degree and the regenerative braking energy absorption start-up threshold adjust the control effect on the return safety parameters. The effect of system power handoff on the security parameters of the return flow is verified through the on-site measurement and analysis. In this paper, the method of return safety parameter control for regenerative braking energy optimization management is studied. The relationship between the energy-saving operation process and the return safety parameter of the system is described, and the calculation method of regenerative braking energy distribution is compared. The optimal objective and optimization model of the system regenerative braking energy management are put forward, and the comprehensive optimization control of the system return safety and energy saving is realized. In this paper, an improved hybrid particle swarm optimization algorithm for regenerative braking energy management optimization model is proposed, which is introduced into the theory of mixing and dynamic inertia weight, so as to avoid the premature convergence of the optimization process and to improve the optimization speed. The results of the example show that the regenerative braking energy optimization management method proposed in this paper can effectively reduce the running loss of the system on the basis of realizing the return flow safety. This paper studies the return safety and energy-saving operation of the energy-fed direct-current traction power supply system. The power flow model of the two-way converter unit of the energy-feed type DC traction power supply system is established, and the modeling of the AC/ DC power flow calculation interface is realized. The return safety and energy-saving operation solution based on the power supply of the two-way converter of the system are put forward, and the distribution and energy loss of the system return safety parameters are simulated and analyzed. The results show that the two-way converter power supply mode can effectively realize the self-zoning of the system power supply, the power hand-off of the control system, and reduce the return flow safety parameter and the system loss. The 2 MW three-level two-way converter of DC traction power supply system is designed, and its output characteristics are verified by field experiment.
【学位授予单位】：中国矿业大学
【学位级别】：博士
【学位授予年份】：2017
【分类号】：U223.6
，
本文编号：2512548
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