摘要
针对大功率、高密度、多种类的机车群在小容量牵引供电网中带来的宽频域谐波和谐振问题,从交流机车的拓扑和调制出发对宽频域谐波产生的机理进行了分析,并结合对两种典型车型,对不同类型机车混跑线路的谐波分布多样性进行了分析.为此提出了基于H桥级联的有源电力滤波器(HCAPF)和高通滤波器(HPF)相结合的谐波抑制方案,利用HCAPF对无功功率进行控制并对低次谐波进行抑制,利用高通滤波器对高次进行吸收.结合示范工程,对参数设计、HCAPF性能测试进行了详细介绍,最后对整个补偿系统投入前、后24 h的电压畸变率等参数进行对比测试,结果表明补偿后电压总畸变率平均值从4.324%下降到2.934%,满足国标,其中各次谐波电压都有较大下降.同时电网电压的最大波动率从14.5%下降到10.7%.
Wide frequency domain harmonics and resonance often appear in small capacity of traction network while high power, high density, and different kinds of locomotives take power in the same power supply arm. The mechanism of wide frequency harmonic was provided by the analysis of locomotive converter topology and modulation of ac locomotive. The harmonic distribution diversity of different types of locomotive assembly was proved by testing the two typical locomotives. The new compensation scheme including a H-bridge cascaded active power filter（HCAPF） and a high-pass filter（HPF） was invented, The former compensates reactive power and restrains low order harmonics, and the latter absorbs high order harmonics and provides fixed capacitative reactive power. Combining the demonstration project, the parameter design and performance were introduced in detail. The object power quality parameters were compared by the 24 hours data before and after the proposed system put into operation. The results show that the voltage distortion rate average is decreases from 4.324% to 2.934%, and every harmonic voltage is improved obviously. The max volatility of network voltage reduce form 14.5% to 10.7%.
出处
《中国科学：技术科学》
EI
CSCD
北大核心
2014年第11期1185-1196,共12页
Scientia Sinica(Technologica)
基金
中国铁路总公司科技研究开发计划(批准号:2012J012-A)资助项目
关键词
牵引供电
交流机车
宽频域谐波
有源滤波器
高通滤波器
级联
traction power supply
AC locomotive
wide frequency domain harmonic
active power filter
high pass filter
cascades
