Modeling the saturation processes of a power-transformer core under simultaneous direct and alternating current passing through the winding

A mathematical model of a three-phase two-winding step-up power transformer with the winding circuit Δ/ Yo with simultaneous ac and dc currents passed through the grounded winding has been developed. The proposed model is represented by a system of differential equations, which are nonlinear because...

Full description

Saved in:
Bibliographic Details
Published in:Russian electrical engineering 2017-04, Vol.88 (4), p.223-228
Main Authors: Vakhnina, V. V., Kuznetsov, V. N., Shapovalov, V. A., Samolina, O. V.
Format: Article
Language:English
Subjects:
Alternating current
Asymmetry
Circuits
Climatology
Differential equations
Direct current
Disturbances
Engineering
Machines
Magnetization
Manufacturing
Nonlinearity
Phase transitions
Processes
Saturation
Thunderstorms
Transformers
Weather
Winding
Citations: Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:A mathematical model of a three-phase two-winding step-up power transformer with the winding circuit Δ/ Yo with simultaneous ac and dc currents passed through the grounded winding has been developed. The proposed model is represented by a system of differential equations, which are nonlinear because of the nonlinearity of the inductive resistances of the magnetization curve. The calculation results for a TDTs-400000/242/20 shell–core transformer are given. The model takes into account the effect of dc on the saturation of the power-transformer core, which is especially important under asymmetrical modes that can occur during thunderstorms, seismic activities, or space-weather disturbances.
ISSN:1068-3712
1934-8010
DOI:10.3103/S1068371217040137