examples of successful simulation in the development cycly of kolektor etra

dr. Nikola Jakšić

2016 ANSYS Convergence ConferenceLjubljana, Slovenia, 25 May 2016

Examples of successful simulation in the development cycle of Kolektor Etra

KOLEKTOR ETRA d.o.o.

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• About Kolektor Etra• Main transformer parts• Noise

– TrafoS application:• Transformer core dynamics• Winding dynamics• Complete transformer dynamics

– Winding magnetic forces• Design optimization

Overview

2016 ANSYS Convergence conferenceLjubljana, Slovenia, 25 May 2016

• Type of enterprise: Limited Liability Company• Total company area: 44.769 m2• Buildings: 19.638 m2• Employees: 330• Technical sector: 72

Kolektor ETRA


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Main transformer parts


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Transformer core

Winding

Drying of active part.

Electrical tests in laboratory.

• TrafoS was developed in cooperation with UL FS LADISK.• MATLAB GUI application runs ANSYS in background.• Prediction of transformer noise.

TrafoS


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TrafoS application.

TrafoS – transformer core


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Static analysis for determining normal pressure due to core

clamping.

Modal analysis of laminated core with

inclusion of interlaminar friction effects*.

* Pirnat, M., Čepon, G., Boltežar, M. (2013), Introduction of the linear contact model in the dynamic model of laminated structure dynamics: an experimental and numerical identification, Mech. mach. theory, vol. 64, pp. 144-154.

TrafoS – windings


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Winding model. Winding harmonic response due to magnetic forces.

TrafoS – transformer dynamics


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Creo 3D model for technical drawings.

Finished ANSYS model with core, windings and oil. Solid-fluid

interaction included.

Harmonic analysis of the model.

• Calculation of electromagnetic forces

Winding magnetic forces


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Magnetic flux density.

Magnetic forces.2D axisymmetric model.

Magnetic core

Air

Low voltage winding

High voltage winding

Design optimization(Virtual prototyping)


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Structural integrity is ensured by the numerical modelling

Design optimization(Virtual prototyping)


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m=323000kg

crane lifting

hydraulic jacks lifting

railway transport

Fmax = m*g/2

• The Expert System

Design optimization (Automatic)


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• Wall of the transformer tank with ribs – parametric model



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• Wall of the transformer tank with ribs – APDL created model



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EXCEL

• Input data• Output data

PYTHON

• Process driver• Outer optimization loop

ANSYS

• Solver for the mechanical model• Main optimization driver

LATEX• Report creator



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• Resulting report



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•R

esul

ting

repo

rt

• 3D models Ansys WB• Parametric modelling Ansys APDL

• Both approaches are used!• Both approaches are needed!

Conclusion


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Thank you for your attention.

examples of successful simulation in the development cycly of kolektor etra

Engineering