Simulation of a Voltage Transformer with a Magnetic Core Made of Amorphous Steels

Bykovskaya, L. V.; Bykovskiyi, V. V.

doi:10.1109/icieam48468.2020.9111971

Cited by 7 publications

(3 citation statements)

References 3 publications

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“…It can cause damage to system equipment, insulation and consumer's distribution devices. Also, it results in misoperation of protection devices due to overvoltage and/or overcurrent of peak value that can exceed more than twice of the normal value [5]. This phenomenon, caused by abnormal operations, results in thermal and electrical stresses [6].…”

Section: Introductionmentioning

confidence: 99%

Elimination of ferroresonance in the distribution zone by high ohmic reactor-shunt limiter

Abdel-hamed

El-Shafhy²,

Badran³

2022

IJEECS

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Electrical network components catastrophically fail as a result of aberrant system oscillations. Also, consequently leads to saturation in the ferromagnetic core elements. These factors induce distortions in the voltage and current waveforms as well as a large rise in voltage or current. This paper presents the role of distributed generation (DG) in contributing to ferroresonance investigation reduction in the distribution sector. A high ohmic reactor-shunt limiter (HOR-SL) is introduced as a novel technique based on a negative sequence component to mitigate ferroresonance. The proposed HOR-SL reduces the ferroresonance in distribution system (DS) by no more than 10.5 msec. A PSCAD/EMTDC software is used to model the ferroresonance phenomenon. The simulation results strongly show the effectiveness of using the proposed HOR-SL for limiting ferroresonant oscillations and creating stable orbit in the distribution sector. Case studies verified the effectiveness of the proposed technique in mitigating ferroresonance oscillations and keeping the security of the distribution zone.

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Section: Introductionmentioning

confidence: 99%

Elimination of ferroresonance in the distribution zone by high ohmic reactor-shunt limiter

Abdel-hamed

El-Shafhy²,

Badran³

2022

IJEECS

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“…The advantages of using amorphous ferromagnetic alloys as a replacement for grain-oriented Si-steel in power transformers are widely reported owing to their low no-load core losses [6]. With the rapid development of amorphous alloy technology, the energy-saving advantages of amorphous alloy core distribution transformers have gradually been accepted by manufacturers and users [7,8]. Due to the shortcomings of amorphous alloy strips such as high hardness, poor short-circuit resistance, and high magnetostriction, the application and market promotion of amorphous alloy transformers are limited [9].…”

Section: Introductionmentioning

confidence: 99%

“…With a large number of amorphous alloy transformers in operation, oil-immersed amorphous alloy transformer faults caused by iron core debris of amorphous alloy are more and more common [7]. There are two sources of core debris of amorphous alloys.…”

Section: Introductionmentioning

confidence: 99%

Core Stress Analysis of Amorphous Alloy Transformer for Rail Transit under Different Working Conditions

Shao

Cheng

2020

Energies

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The rail transit system is a large electric vehicle system that is strongly dependent on the energy technologies of the power system. The use of new energy-saving amorphous alloy transformers can not only reduce the loss of rail transit power, but also help alleviate the power shortage situation and electromagnetic emissions. The application of the transformer in the field of rail transit is limited by the problem that amorphous alloy is prone to debris. this paper studied the stress conditions of amorphous alloy transformer cores under different working conditions and determined that the location where the core is prone to fragmentation, which is the key problem of smoothly integrating amorphous alloy distribution transformers on rail transit power supply systems. In this study, we investigate the changes in the electromagnetic field and stress of the amorphous alloy transformer core under different operating conditions. The finite element model of an amorphous alloy transformer is established and verified. The simulation results of the magnetic field and stress of the core under different working conditions are given. The no-load current and no-load loss are simulated and compared with the actual experimental data to verify practicability of amorphous alloy transformers. The biggest influence on the iron core is the overload state and the maximum value is higher than the core stress during short circuit. The core strain caused by the side-phase short circuit is larger than the middle-phase short circuit.

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High Ohmic Reactor as a Shunt Limiter (HOR-SL) Method for Ferroresonance Elimination in the Distribution System

2022

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Simulation of a Voltage Transformer with a Magnetic Core Made of Amorphous Steels

Cited by 7 publications

References 3 publications

Elimination of ferroresonance in the distribution zone by high ohmic reactor-shunt limiter

Elimination of ferroresonance in the distribution zone by high ohmic reactor-shunt limiter

Core Stress Analysis of Amorphous Alloy Transformer for Rail Transit under Different Working Conditions

High Ohmic Reactor as a Shunt Limiter (HOR-SL) Method for Ferroresonance Elimination in the Distribution System

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