Energy Efficient Distribution Transformer Solutions

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Energy Efficient Distribution Transformer
Solutions

• Raymond Van Schevensteen
• Pauwels Trafo Belgium

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Design concepts

• Optimised design parameters are determined by
• Technical specifications
• Base material prices
• Transformer load profile
• Loss-values or loss-evaluation
• Iron/copper balance
• Labour cost

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Design concepts improve efficiency

• Improve efficiency via no-load losses (Po)
• Selection of type of Magnetic Steel
• Selection of Cutting Pattern
• Reduce Flux density (increase section)
• Improve efficiency via load losses (Pk)
• Selection of conductor material Cu-Al and shape
• Reduce Current Density (increase section)
• More or better material - extra cost

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Historical evolution in the production of
magnetic steel
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Domain refining of HiB saves 15 core loss(ZDKH,
PJ, PDR, Trancor-H, )
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Multi step-lap (automated)
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The Ultimate Performer

• Amorphous Metal

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Hysteresis curves CGO versus amorphous metal
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Technical comparison
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Production of amorphous metal
Production of a single-phase amorphous transformer
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Three-phase transformer with 4 wound cores (4
cores / 5 legs)
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Results of using amorphous metal cores
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8-core assembly completed
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Wrapped core joint LV-side
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Active part seen from HV side
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Evans- design
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