Voltage Regulation -- Transformer

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SUMMARY

The discussion focuses on the voltage regulation of a 415V to 11 kV transformer rated at 200 kVA, specifically addressing two problems. The first problem requires calculating the percentage regulation at a 0.8 power factor lagging, using a winding resistance of 0.014 Ω and leakage reactance of 0.057 Ω. The second problem involves determining the maximum allowable secondary winding resistance to achieve 2% regulation at unity power factor, given a primary winding resistance of 10 mΩ.

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  • Understanding of transformer voltage regulation concepts
  • Familiarity with power factor calculations
  • Knowledge of electrical resistance and reactance
  • Ability to apply Ohm's Law and related equations in electrical engineering
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Electrical engineers, students studying power systems, and professionals involved in transformer design and analysis will benefit from this discussion.

peppa
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Homework Statement



5. A 415V to 11 kV transformer has a rating of 200 kVA. The winding resistance and leakage reactance when referred to the primary are 0.014 Ω and 0.057 Ω respectively.

(a) Determine the % regulation of the transformer at 0.8 power factor lagging.

(b) In designing a particular 415V to 11 kV, 200 kVA transformer, the primary winding resistance is to be 10 mΩ. Find the maximum winding resistance of the secondary winding if the transformer is to have 2% regulation at unity power factor.

Homework Equations





The Attempt at a Solution



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I think I'm on the right track with a) but a little lost with part b)

Any help will be much appreciated
 
Could you please paste your work from the PDF file here into the forum window? That will make it much easier for folks to check your work and comment on it. Thank you.
 

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