Assessing harmonic impedance/admittance for unbalanced three-phase power system contains traction load on the basis of recorded data

Due to the random and unbalanced characteristic of electrified railway load, it is hard to get satisfactory results for the assessment of system harmonic impedance/admittance by using the single- phase model that accepted widely. In this paper, a versatile matrix model for assessing system side harm...

Full description

Saved in:
Bibliographic Details
Main Authors: Hui Zhou, Xinyin Xiong, Yaowu Wu, Suhua Lou
Format: Conference Proceeding
Language:English
Subjects:
Algebra
Power supply quality and harmonics
Transportation
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Due to the random and unbalanced characteristic of electrified railway load, it is hard to get satisfactory results for the assessment of system harmonic impedance/admittance by using the single- phase model that accepted widely. In this paper, a versatile matrix model for assessing system side harmonic impedance/admittance in unbalanced three- phase power system is derived through the analysis on the two system models with different connections of star and delta. On the basis of recorded harmonic voltages and currents data at the connection point of the load and the system, using multivariate linear regression, each value of the harmonic impedance/admittance matrix elements is assessed to get the harmonic impedance/admittance matrix of this power system. Through the simulation experiments and the error analysis on the results of assessments, the model is proved to be correct and effectual. The results of this study may be used as the basic work in assessing the emission limits for nonlinear loads and also for sizing harmonic filters under unbalanced three-phase situation. (6 pages)
DOI:10.1049/cp:20062194