Numerical simulation of 3D stray field and short circuit impedance for a phase-shifting rectifier transformer

This paper deals with the problem of the leakage inductance calculations in power transformers. Commonly, the leakage flux in the air zone is represented by short-circuit inductance, which determines the short-circuit voltage, which is a very important factor for power transformers. That inductance is a good representation of the typical power transformer windings, but it is insufficient for multi-winding ones. This paper presents simple formulae for self- and mutual leakage inductance calculations for an arbitrary pair of windings. It follows from a simple 1D approach to analyzing the stray field using a discrete differential operator, and it was verified by the finite element method (FEM) calculation results.

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Study on Characteristic Parameters of Short-Circuit Impedance for a Four-Winding Inductive Filtering Transformer in Power System Supplying Nonlinear Loads

IEEE Access ◽

10.1109/access.2019.2930829 ◽

2019 ◽

Vol 7 ◽

pp. 115273-115280 ◽

Cited By ~ 1

Author(s):

Zhao Huang ◽

Yuehui Chen ◽

Saimei Shi ◽

Longfu Luo

Keyword(s):

Power System ◽

Short Circuit ◽

Characteristic Parameters ◽

Nonlinear Loads ◽

Circuit Impedance

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Study on Short-Circuit Impedance Characteristics in DN Traction Electric Lines

IOP Conference Series Earth and Environmental Science ◽

10.1088/1755-1315/310/3/032053 ◽

2019 ◽

Vol 310 ◽

pp. 032053

Author(s):

Yang Liu ◽

Zijian Yin ◽

Qiang Gao ◽

Xingjun Tian ◽

Xiaoxuan Yang

Keyword(s):

Short Circuit ◽

Impedance Characteristics ◽

Circuit Impedance

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Leakage Inductances of Transformers at Arbitrarily Located Windings

Energies ◽

10.3390/en13236464 ◽

2020 ◽

Vol 13 (23) ◽

pp. 6464

Author(s):

Marcin Jaraczewski ◽

Tadeusz Sobczyk

Keyword(s):

Differential Operators ◽

Short Circuit ◽

The Self ◽

Power Transformers ◽

Stray Field ◽

The Finite Element Method ◽

Leakage Inductance ◽

Leakage Flux ◽

Partial Differential Operators ◽

Internal Asymmetry

The article presents the calculation of the leakage inductance in power transformers. As a rule, the leakage flux in the transformer window is represented by the short-circuit inductance, which affects the short-circuit voltage, and this is a very important factor for power transformers. This inductance reflects the typical windings of power transformers well, but is insufficient for special transformers or in any case of the internal asymmetry of windings. This paper presents a methodology for calculations of the self- and mutual-leakage inductances for windings arbitrarily located in the air window. It is based on the 2D approach for analyzing the stray field in the air zone only, using discrete partial differential operators. That methodology is verified with the finite element method tested on real transformer data.

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