一种改进型Vv牵引变压器及其牵引供电系统仿真研究  

An Improved Vv Traction Transformer and the Simulation Study of Its Traction Power System

作　　者：许加柱[1] 白俊锋[1] 赵志宇[1] 罗隆福[1] 李建英[1] 

机构地区：[1]湖南大学电气与信息工程学院,湖南长沙410082

出　　处：《高压电器》2010年第8期43-47,51,共6页High Voltage Apparatus

摘　　要：针对目前电气化铁道牵引供电网存在谐波污染严重的问题,提出了一种具有谐波屏蔽功能的改进型Vv牵引变压器。首先介绍了基于传统Vv接线牵引变压器的牵引变电所接线方案;在此基础上,给出了改进型Vv接线牵引变压器的接线方案,并建立了谐波数学模型;基于谐波数学模型,分析求得滤波绕组的零阻抗设计和配套滤波器的全调谐设计是实现牵引侧谐波有效抑制的重要条件;最后,以某一牵引供电站实测数据为参考,建立了传统方案和改进方案的系统仿真模型。仿真结果表明:改进型Vv牵引变压器可将谐波电流有效地抑制在牵引侧,使得高压侧电流基本接近正弦波,谐波抑制效果显著,且滤波绕组电压等级较低,可有效降低滤波器的成本。An improved Vv traction transformer was developed to suppress heavy harmonic pollution in traction power grid. In this paper, the connection scheme of traction substation with conventional Vv traction transformer is introduced, a connection scheme of the improved Vv traction transformer is consequently proposed, and a mathematical harmonic model of the improved transformer is established. Based on the harmonic model, the implemental conditions of suppressing harmonics at the traction side are analyzed. Moreover, two simulation models of both conventional and improved Vv traction transformer systems are established according to the testing data in a traction substation, and the comparison of both simulation results shows that the improved Vv traction transformer can suppress the harmonics at its traction side effectively, and make the current waveform of grid side approach sinusoid with lower voltage degree of filter windings, which can decrease the cost of the traction system.

关 键 词：Vv牵引变压器 电气化铁道 谐波抑制 谐波数学模型 

分 类 号：U224[交通运输工程—道路与铁道工程]