考虑谐波因素的电铁无功功率计量及其LabVIEW实现  

Electrical Railway Reactive Power Computation Considering Harmonic Components and Its Realization with LabVIEW

作　　者：拜润卿 夏岩[2] 郑伟[1] 

机构地区：[1]甘肃电力科学研究院,甘肃兰州730050 [2]兰州理工大学,甘肃兰州730050

出　　处：《电气自动化》2011年第4期83-85,共3页Electrical Automation

摘　　要：电铁供电系统中谐波含量较高,对无功功率计算产生不可忽略的影响。考虑各次谐波无功的无功功率定义,提出基于小波包变换的谐波总无功功率算法,以小波包变换重构各次谐波波形,并通过LabVIEW搭建虚拟总无功功率测量仪。仿真结果表明了虚拟无功测量仪能有效提高谐波干扰下的无功电能计量准确性。High level harmonics in electrical railway power supply system affected the accuracy of reactive power measurement,so a new reactive power definition which considers the harmonics was adopted.In this article,a method analysis based on wavelet packet was proposed and applied in virtual instrument software LabVIEW.The simulation results show that the method is efficient in measuing reactive power of electrified railway precisely.

关 键 词：电铁谐波 小波包变换 无功功率计量 LABVIEW 

分 类 号：TP29[自动化与计算机技术—检测技术与自动化装置]