摘要
电气化铁道牵引负载是电力系统中主要谐波源之一。由于电气化铁道牵引负载受线路条件等多种因素影响而波动剧烈,因此产生的谐波也具有随机波动性。该文基于大量牵引负载谐波实测数据,对牵引负载谐波的分布特征进行了分析,并采用最佳平方逼近法对牵引负载谐波概率密度函数进行了曲线拟合,得到了牵引负载谐波的概率模型。误差分析说明得到的牵引负载谐波概率模型是准确的。建立牵引负载谐波分布模型将对分析和研究牵引负载谐波起到关键帮助作用。
The traction load of electrified railway is one of main harmonic sources in power system. Traction load varies rapidly for multi-factors such as rail condition, so traction load harmonic also has random time-varying characteristic. This paper analyzes distribution characteristic of traction load harmonic based on a great deal recorded harmonic data. Curve fitting for probability density function of traction load harmonic is carried out using least squares approach, and probability model of traction load harmonic is obtained. The accuracy of the proposed model is verified by error analysis. The establishment of traction load harmonic model is helpful for studying on traction load harmonic.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2005年第16期79-83,共5页
Proceedings of the CSEE
关键词
电力电子
电气化铁道
谐波
模型
最佳平方逼近
Power electroncis
Electrified railway
Harmonic
Model
Least squares approach
