【作者】 裴延涛；

【导师】 朱明星；

【作者基本信息】 安徽大学 ， 模式识别与智能系统， 2013， 硕士

【摘要】 城市轨道交通包括三种类型的交通方式：地铁、高架和轻轨。地铁是在地下运行,不占用地面空间,再加上有专门的轨道,所以和城市轨道交通的其他方式相比,地铁具有巨大的优越性。例如,地铁具有速度快、不会拥堵、安全、舒适、干扰小等优点。地铁在给我们带来便利的同时,也带来了一些负面影响,这主要表现在对电能质量的污染方面。本文将围绕地铁带来的电能质量问题和解决方案展开讨论,并结合城市轨道交通的具体实例进行研究,从而探讨解决这些电能质量问题的有效途径。本文的具体研究内容如下：(1)从理论和仿真两个方面阐述了24脉波整流产生谐波的原因,通过对实测数据进行分析,验证了理论研究的正确性。(2)结合实测数据,从谐波特性和功率特性两个方面说明城市轨道交通负荷的用电特点。(3)在对电压波动的测量和计算方面,采取一种新颖的理解思路,从而使可操作性和精确度得到提高。(4)给出无功和谐波问题解决方案,仿真验证了方案的可行性。更多还原

【Abstract】 Urban rail transit includes three types of transportation:metro,elevated road and light rail.The metro travels under the ground and doesn’t occupy the ground space.What’s more,compared to other types of communications,the metro has great superiority owes to its special tracks.For instance,The metro has advantages in many aspects,such as fast running,less chances for traffic jams,safe,comfortable and less interference.The metro brings us many benefits, at the same time causes negative effects, for instance, the metro pollutes the power quality. This article will discuss the power quality problem brought by metro and the solution, and finally, a better method of improve and harness power quality is mentioned after analyzing the examples in a certain city railway system.This mainly discussed the following contents:(1) This paper analyzes the reason for the harmonic in24pulse rectifier unit from two aspects——the theory and the silulation.The result is proved to be correct by calculating the effective data.(2) This artice reveals the characters of the power quality in the urban rail transit load by calculating the effective data from two aspects——the harmonic character and the power character.(3) This paper uses a new method to measure and calculate the voltage fluctuation,which improves the maneuverability and the precision.(4) A method of solving the harmonic and reactive power problems is goven.The method is proved to be feasible by simulating.更多还原