How can I model an autotransformer through a Three-Phase OLTC Regulating Transformer ?

I want to model a 62.5/50 MVA auto transformer how can I model it by Three-Phase OLTC Regulating Transformer?

Answer 1

[Kothuri]

Hi ,

I understand that you would like to model an auto transformer using a “Three-phase OLTC Regulating Transformer”. This block is used to model a three-phase two-winding transformer or autotransformer using an on-load tap changer (OLTC) for regulating voltage on a transmission or distribution system. You can configure the block by

• Double-click on the “Three-Phase OLTC Regulating Transformer” block to open its parameters dialog.
• Set the parameters according to the transformer's specifications such as
• Nominal Power: Set this to the higher of the two ratings, which is 62.5 MVA in this scenario. This ensures that the transformer is rated for the maximum power.
• Tap Changer Settings: Configure the OLTC settings, including the number of taps, tap step size, and the voltage regulation range.
• And configure the other parameters of the OLTC block as per the rated values.

You refer the below documentation link for more information on Three-phase OLTC Regulating Transformer

https://www.mathworks.com/help/sps/powersys/ref/threephaseoltcregulatingtransformerphasortype.html