Corpus ID: 12837636

Evaluation of 3 Phase Dry Transformer under Non-Sinusoidal Load Currents and Unbalanced Voltage Supply

@inproceedings{KarimpourMouziraji2015EvaluationO3,
  title={Evaluation of 3 Phase Dry Transformer under Non-Sinusoidal Load Currents and Unbalanced Voltage Supply},
  author={Seyed Reza Karimpour-Mouziraji and I. Ahmadi},
  year={2015}
}
Unbalanced voltages can result in adverse effects on equipment, which is intensified by the fact that a small unbalance in the phase voltages can cause a disproportionately larger unbalance in the phase currents. In this paper a 15 kVA 3-phase dry transformer has been analyzed using theoretical modeling. Specifically, modeling the transformer under nonlinear and linear loads under un-balanced supply voltage in 3D has been investigated. Transformer loss under linear loads is compared with non… Expand

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References

SHOWING 1-10 OF 14 REFERENCES
No-load loss calculation of distribution transformers supplied by nonsinusoidal voltage using three-dimensional finite element analysis
Transformers are basically designed to operate under nominal voltage, rated frequency and also, pure sinusoidal load current. In recent decade, change in the type of loads and increasing use of powerExpand
Behavior of three-phase transformers supplying non linear loads using time domain representation and finite element analysis
This paper aims to present and discuss the magnetic and electrical results derived from three-phase power transformers modeling under nonlinear load conditions. The approach uses time-domainExpand
Modeling and simulation of transformer loading capability and hot spot temperature under harmonic conditions
Abstract Due to nonlinear loads, power frequency harmonics exist mainly in power systems so that they increase the losses and temperature inside the power transformer consequently. The hot spotExpand
Modeling critical overloading in 6–10/0.4 kV, 250–630 kVA power, oil-immersed transformers
This study was motivated by its critical importance to the current problem of electricity supplies in Armenia. The time duration for oil-immersed power transformers in both operating (heatingExpand
Transformer design and application considerations for nonsinusoidal load currents
The use of adjustable-speed drives requires transformers capable of withstanding high levels of harmonic currents under normal operating conditions. Experience has been that overheating problems areExpand
Modal analysis of power systems to mitigate harmonic resonance considering load models
To detect and alleviate harmonic resonance in a power system have been a delicate issue. In this paper, the effect of load modeling on resonance behavior of power systems employing eigenvalueExpand
Investigation of the harmonic behavior of three phase transformer under nonsinusoidal operation using finite element and wavelet packets
This paper investigates the harmonic behavior of three phase power transformers under nonsinusoidal operations. The terminal behavior of the transformer was obtained by coupling the transformerExpand
Energy efficiency optimization in distribution transformers considering Spanish distribution regulation policy
In transmission and distribution systems, the high number of installed transformers, a loss source in networks, suggests a good potential for energy savings. This paper presents how the SpanishExpand
Generic algorithm to select building-lighting technologies for minimizing total harmonic distortion
The proliferation of nonlinear loads has raised new concerns about the power quality in commercial buildings. Higher cost of repair, and the reduction in average life of equipment, both on the supplyExpand
Finite Element Method Magnetics
Acknowledgements Thanks to the following people for their valuable contributions to FEMM: • Si Hang, for writing fast point location routines that greatly increase the speed at which FEMM evaluatesExpand
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