电气化铁道YNvd接线牵引供电系统的电气分析与计算  

Electrical Analysis and Calculation on the Traction Power Supply System of YNvd Connection for Electrified Railway

作　　者：陈民武[1,2] 宫衍圣[1] 李群湛[2] 张丽艳[2] 

机构地区：[1]中铁第一勘察设计院集团有限公司电气化处,陕西西安710043 [2]西南交通大学电气工程学院,四川成都610031

出　　处：《中国铁道科学》2011年第6期82-88,共7页China Railway Science

基　　金：国家"十一五"科技支撑计划项目(2007BAA12B05)

摘　　要：针对目前电气化铁路YNvd接线牵引供电系统设计中阻抗匹配、与电力系统的一体化以及牵引网电压的波动等问题,基于严格的YNvd变压器原次边电气量变换关系,推导出变压器二次侧两相端口电压输出方程,并定量分析阻抗匹配非理想情况下的变压器负序和谐波特性;基于三相分析法构建YNvd接线带无功、负序综合补偿和滤波装置的牵引供电系统三相等效模型,得到无功、负序综合补偿装置的三相导纳矩阵和等效滤波装置三相谐波导纳矩阵,实现与电力系统在三相拓扑结构上的统一。推导出牵引变电所各种负荷条件下等效三相和两相牵引母线的电压损失计算公式,分析再生制动工况对电压损失的影响。According to the problems of impedance matching,integration with power system and voltage fluctuation in the design of YNvd connection traction power supply system for electrified railway,the two-phase equivalent circuit in secondary side is derived based on the strict relation of the primary and secondary side in the electric transformation of the YNvd transformer,and the characteristics of negative phase-sequence and harmonic are analyzed quantitatively under nonideal impedance matching.Based on the three-phase analysis method,the three-phase equivalent model of YNvd connection traction power supply system with comprehensive compensator for reactive power and negative sequence as well as filter device is built.Then the three-phase admittance matrix of comprehensive compensator for reactive power and negative phase-sequence as well as the three-phase admittance matrix of equivalent filter for the harmonic are obtained,which can be integrated with three-phase topology of power system.Finally,the calculation equations of the equivalent three-phase and two-phase busbar voltage loss are derived under various load conditions of traction substation,and the influence of regenerative braking on the voltage loss is analyzed.

关 键 词：电气化铁路 YNvd变压器 三相等效模型 负序 谐波 电压损失 

分 类 号：U223.2[交通运输工程—道路与铁道工程]