【作者】 肖楚鹏；

【导师】 李群湛；

【作者基本信息】 西南交通大学 ， 电力系统及其自动化， 2012， 硕士

【摘要】 我国高原地区幅员辽阔,但由于多年冻土、高寒缺氧、生态脆弱等较为恶劣的自然环境,使得高原地区经济发展缓慢。为促进高原地区经济、社会发展,减小我国东西部经济发展不平衡度,建立东西部便利的交通运输通道,在高原地区修建电气化铁路势在必行。电缆牵引供电方式有着牵引网阻抗小、供电距离长、对外部电源适应性强、钢轨电位小等优异特点,可以为高原电气化铁路所选择使用。本文分析了电缆牵引供电方式牵引网结构,推导了牵引网等值电路模型。利用等值模型计算了单复线牵引网短路阻抗、电压损失理论公式。文中进一步对牵引网进行研究,推导了牵引网电流分布、电缆电流分配系数、牵引网单位阻抗、钢轨电位和电流等电气参数,初步建立电缆牵引供电方式的系统理论。本文运用平行多导体原理,利用MATLAB/SIMULINK软件建立了电缆牵引供电方式牵引网仿真模型。通过仿真模型验证了等值电路推导的正确性,并对电缆分配系数、牵引网空负载电压分布、钢轨电位和电流等电气参数进行了仿真研究。本文还分别对带回流线直接供电方式、AT供电方式及电缆牵引供电方式进行了比较分析。参考电缆牵引供电方式牵引网建模方法,建立了AT供电方式和带回流线直接供电方式仿真模型,从牵引网短路阻抗、电压损失、钢轨电位、供电质量、外部电源适应性、工程建设投资及运营维护成本等角度进行了技术经济性比较,分析各供电方式的优缺点。最后,本文对电缆牵引供电方式在高原地区应用于电气化铁路的可行性进行了分析。更多还原

【Abstract】 China’s plateau is a vast territory, but there is permafrost, alpine hypoxia, ecologically fragile harsh natural environment.So the economic of plateau develops slowly. In order to improve the economic development of plateau region, reduce the imbalance degree of economic development between eastern and western China, set up the convenient transport channel between eastern and western China, it is very necessary to build electrified railway. Cable traction power supply has excellent characteristics that, network impedance is small, the distance of power supply is long, power supply adaptability is external, rail voltage is low and so on. So that it could be selected to use in the electrified railway of plateau region.The paper analyzes the network structure of cable traction power supply, derived the equivalent circuit model of the traction network. Calculate the theoretical formula of single and double-track traction network short-circuit impedance and voltage loss.The paper researchs the traction network further more, derived the electrical parameters of current distribution of network, distribution coefficient of cable’s current, rail voltage and current, establish the system theory of cable traction power supply preliminarily.The paper establishes the simulation model of cable traction power supply using the principle of parallel multi-conductor transmission line and MATLAB/SIMULINK software.Using the simulation model to verify the correctness of the derivation of equivation circuit, and simulation study on the electrical parameters of distribution coefficient of cable’s current, voltage distribution of no-load and load of traction network, rail voltage and current.The paper also comparative analysises the direct power supply with return line, AT power supply and cable traction power supply. Reference the way of establishing simulation model of cable traction power supply, establish the simulation of AT power supply and direct power supply with return line, and conducts a technical and economic comparison such as network short-circuit impedance, voltage loss, rail voltage, quality of power supply, adaptability of external power supply, construction investment, operation and maintenace costs.Finally, analyzes the feasibility of cable traction power supply using the electrified railway in plateau region.更多还原