轻轨供电系统谐波的测量与仿真分析  

Effects of Power System in Urban Traction Transportation on Harmonics of Public Electricity Grid

作　　者：黄友聪[1] 周凯[1] 李旭涛[1] 赵威[1] 陶霰韬[1] 

机构地区：[1]四川大学智能电网四川省重点实验室,成都610065

出　　处：《电测与仪表》2011年第7期50-54,共5页Electrical Measurement & Instrumentation

摘　　要：轻轨供电系统采用直流牵引,具有波动性强、系统谐波含量丰富等特点,极可能威胁到电力系统的安全稳定运行。本文研究轻轨供电系统在不同运行状态下对公共电网谐波的影响规律。依据机车、牵引供电系统和公共电网的实际参数,搭建包括公共电网在内的城市轨道交通牵引供电系统整体仿真模型,并通过实际的现场谐波测试数据加以验证。以此模型为平台,得出该供电系统向公共电网注入谐波主要是24脉波整流导致的特征谐波(23次、25次)和逆变器开断导致(11次、13次)。谐波含量在单端供电极限运行情况下较为严重,在列车启动瞬间其总谐波畸变率可达到17%。尽管在极端运行情况下,但各次谐波含量都未超过国家标准允许值。这些研究可为调查城市轨道交通供电系统的影响提供理论支持。The effects of harmonic caused by electric locomotive in urban transportation are investigated in this paper.According to main connections and parameters of the practical traction power system in urban transportation,it established a complete model including traction motor and public power system.In order to verify the simulation model,the measurement on-site is also performed and the results of measurement can well support the simulation model.Depending on the model,a principle and characteristics of harmonic injection can be obtained at different operating condition.Under the severe condition of single power source,the harmonic is still lower than stated in the national standard.However,at the moment of start of traction motor,the total harmonics can even reach 17%.The research can provide a support to understand the effects of traction power supply on public electricity grid.

关 键 词：轨道交通 谐波 公共电网 电能质量 仿真 

分 类 号：TM712[电气工程—电力系统及自动化]