电气化铁道对无功电能计量影响的研究  

Study of Influence of Electric Railway on Measurement of Reactive Electric Energy

作　　者：闵永智[1] 刘禾[2] 李晓东[1] 

机构地区：[1]兰州交通大学自动化与电气工程学院,兰州730070 [2]安康供电局,陕西安康725000

出　　处：《工业计量》2009年第3期1-3,10,共4页Industrial Metrology

基　　金：甘肃省自然基金(3ZB082-B25-031);兰州交大科研基金(207110)

摘　　要：电气化铁道为电网注入了大量谐波电流,降低了电网电能质量。而目前谐波对无功电能表计量特性影响的研究还不完善。文章在传统无功功率定义的基础上,按照C.Budeanu频域法,给出谐波下非正弦无功功率的定义,并且比较了电气化铁道中谐波对目前无功计量两种电能表的准确度影响,给出了电气化铁道中无功电能表的选择原则。In electric railway, a vast amount of harmonic current has been injected into electric grid, and power quality has been reduced. At present, research of influence of harmonies on measurement performance of reactive electric energy meter is unperfect. Based on definition of traditional reactive power, definition of nonsinusoidal reactive power is provided according to C. Budeanu frequency domain method. Inpluence of electric railway harmonic on two kinds of reactive electric energy meter in mar- ket is compared. Finally, selection principle of reactive electric energy meter in eleetric railway is proposed.

关 键 词：电气化铁道 谐波 无功 计量 

分 类 号：U223.63[交通运输工程—道路与铁道工程]