【作者】 霍长龙；

【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， 2010， 硕士

【摘要】 由于电气化铁路牵引供电系统结构的特殊性,导致电气化铁道牵引供电系统存在大量的负序、谐波、无功,以及相邻供电区段分相绝缘器引起的列车速度和牵引力损失等问题,严重制约了高速铁路的发展。本文将YNvd平衡变压器和Vv接线变压器与综合潮流控制器相结合,构建新型同相牵引供电系统。该系统基本能够消除三相不平衡,并使谐波含量尽可能得好,能够从根本上解决了铁道部门与电力部门的主要矛盾。取消电分相环节,顺应了客运高速化、货运重载化的时代趋势。本文研究的是电气化铁路同相供电系统的方案,针对电气化铁路的直接供电方式,根据不同的牵引变压器接线方式,采用不同结构的的潮流控制器,进而提出若干不同的同相供电系统方案,最终通过仿真验证改造方案的可行性。本文首先介绍了同相供电系统,之后介绍了基于不同牵引变压器的同相供电方案,并基于两种不同的系统方案进行了理论分析。同相供电系统的核心内容就是综合潮流控制器,本文对潮流控制器的控制原理以及控制方案进行了详细的叙述。分析了潮流控制器的功率关系,容量关系。针对潮流控制器的指令电流生成方法和控制策略分别进行了详细的研究。本文采用MATLAB／SIMULINK中的电力系统仿真元件库对所提出同相供电系统方案进行了建模与仿真。仿真结果验证了本文给出的同相供电系统结构、平衡补偿方案、综合补偿电流检测方法等是正确可行的。更多还原

【Abstract】 Because of the special structure of electric traction power supply system of electrified railway.Cause a lot of problems exist in electric traction power supply system of electrified railway,such as abundant negative sequence、harmonics and reactive power, and the lost of traction speed and power which are restricted by the neutral section insulator between adjacent power supply sections. A new type of cophase traction power supply system is built by combining YNvd connection transformer and combining Vv connection transformer with IPFC(Integrated Power Flow Controller). The system can comb-out three-phase unbalance basically, and provides minimum harmonic content, thereby, the inconsistency between railway department and electric power department will be solved radically. The remove of the neutral section insulator conform to the trend of the High-Speed Passenger Service and the Heavy Cargo Service.The main research objective in this paper is the scheme of cophase traction power supply system. According to the different connection of transformer,using the different structures of IPFC.We can built the different scheme of cophase traction power supply system. The software simulation is carried out and results show the correnctness of system topology,detection method and control method.The proposed system is proved to be feasible by the simulation.In this paper,first introduce the different scheme of cophase traction power supply system.After that,introducing the scheme of cophase traction power supply system based on the different connection of transformer.Theoretical analysis is carried out based on the different scheme of cophase traction power supply system.The core content of cophase traction power supply system is IPFC,in this paper,there is a detailed description for the control principle and control scheme of IPFC. Power relations, capacity and capacity availability of system are analyzed; methods on detecting reference currents and controlling filters are researched.These two proposed systems are modeled and simulated under MATLAB/SIMULINK in this paper. The proposed configurations of cophase power supply systems, currents balance compensation methods, comprehensive detecting reference are proved to be true and feasible.更多还原