Probability Model of Traction Load Harmonics Based on Least Square Approximation

Author

Xie, Shao-Feng

Author_Institution

Southwest Jiaotong Univ., Chengdu

Volume

1

fYear

2007

fDate

3-5 May 2007

Firstpage

503

Lastpage

507

Abstract

Mostly traction loads are AC/DC type loads. A great lot of harmonic produced by electrified locomotive (mainly including order 3, 5 and 7) is directly injected into utility. The effect of harmonic to utility must not be ignored. But traction loads have different characteristics from normal loads in power system, such as random and unbalance. So traction load harmonic also has random time-varying characteristic. The distribution characteristics of traction load harmonic are analyzed based on a great deal recorded harmonic data in this paper. Curve fitting for distribution characteristics based on least square approximation is carried out, and probability density function of traction load harmonic is obtained. The accuracy of the proposed model is verified by error analysis. The exact traction load harmonic model is helpful for studying on traction load harmonic.

Keywords

curve fitting; electric locomotives; least squares approximations; probability; AC/DC type loads; curve fitting; electrified locomotive; least square approximation; probability density function; random time-varying characteristic; traction load harmonics; Least squares approximation; Load modeling; Power quality; Power system analysis computing; Power system harmonics; Power system modeling; Probability density function; Rail transportation; Railway electrification; Random processes;

fLanguage

English

Publisher

ieee

Conference_Titel

Electric Machines & Drives Conference, 2007. IEMDC '07. IEEE International

Conference_Location

Antalya

Print_ISBN

1-4244-0742-7

Electronic_ISBN

1-4244-0743-5

Type

conf

DOI

10.1109/IEMDC.2007.382718

Filename

4270691