FREQUENCY-DEPENDENT EDDY-CURRENT MODELS FOR NONLINEAR IRON CORES

被引：48

作者：

TARASIEWICZ, EJ ^{[1
]}

MORCHED, AS ^{[1
]}

NARANG, A ^{[1
]}

DICK, EP ^{[1
]}

机构：

[1] ONTARIO HYDRO,DIV RES,TORONTO,ONTARIO,CANADA

来源：

IEEE TRANSACTIONS ON POWER SYSTEMS | 1993年 / 8卷 / 02期

关键词：

EDDY CURRENTS; TRANSFORMER; EMTP; FREQUENCY DEPENDENT EDDY CURRENT MODELS;

D O I：

10.1109/59.260823

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Frequency dependent representations of eddy currents in laminated cores of power transformers are developed. One representation is based on a continued fraction expansion for the frequency dependent magnetizing impedance while the other is based on a discretization of flux distribution within the lamination. Both models are low order and reproduce the frequency characteristics of the transformer magnetizing branch up to 200 kHz with less than 5% error. The importance of modeling the frequency dependence of eddy currents for the calculation of the transient recovery voltage across a low voltage transfomer breaker interrupting a nearby fault is demonstrated.

引用

页码：588 / 597

页数：10

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