三相V/V接线牵引变压器供电系统的电能质量问题  

Research on problems of power quality of power supply system with three-phase V/V connected traction transformer

作　　者：刘鹏[1] 金庆忍[1] 邓俊杰[2] 时庆[2] 李朝晖[2] 刘会金[2] 

机构地区：[1]广西电网公司电力科学研究院,南宁广西530023 [2]武汉大学电气工程学院,湖北武汉430072

出　　处：《武汉大学学报（工学版）》2015年第1期92-96,101,共6页Engineering Journal of Wuhan University

基　　金：国家自然科学基金项目(编号:51177112)

摘　　要：牵引负荷是一种随机波动性很大的大功率单相负荷.实践证明其对电网有较大影响,尤其是在电能质量方面.为了治理牵引供电系统带来的电能质量问题,以典型的采用三相V/V接线牵引变压器的牵引供电系统和SS9交直型电力机车为例,首先分析了三相V/V接线牵引变压器带来的谐波和负序电流的特点,然后在PSCAD/EMTDC上建立了地区电网以及牵引供电系统模型,设定具体工况进行仿真,验证并分析整个牵引供电系统对电网带来的电能质量问题,为下一步选择和设计治理方案提供依据.Traction load is a kind of large-power, single-phase load which has strong random fluctuation. It has been found that it has a great effect on the grid of Guilin district, especially in the aspect of power quality. In order to solve the power quality problems brought by tractive power supply system, a typical tractive power supply system with three-phase V/V connected traction transformer and SS9 AC/DC elec- tric locomotive is taken for example; firstly the feature of the harmonic and negative sequence current brought by three-phase V/V connected traction transformer is analyzed; and then the mode[ of the grid of a district and the tractive power supply system is built with PSCAD/EMTDC. After that specific working condition is set and then move on the simulation. The power quality problems of the grid of a district brought by the whole tractive power supply system is verified and analyzed. The results provide a basis for choosing and designing the solving scheme as the next step.

关 键 词：牵引供电系统 电能质量 电力机车负荷 V/V接线牵引变压器 PSCAD/EMTDC 

分 类 号：TM922[电气工程—电力电子与电力传动]