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Lecture 17 - UCF Non-ideal Transformer in Per Unit System...

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CF Non-ideal Transformer in Per Unit System UCF Or

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CF Voltage Regulation in Per Unit System UCF % 100 / % 100 × = × = Sfl Sfl P Sfl Sfl Snl V V n V V V V VR Voltage regulation: pu S pu eq pu S pu P Z _ _ , , I V V + = Voltage regulation in per unit: % 100 , , , × = pu S pu S pu P V V V VR
CF Autotransformer (1) UCF

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CF Autotransformer (2) UCF n n C SE SE C = = I I V V , SE C H C L V V V V V = + = = 1 1 ' 1 n n n n E SE C C H L + + = + = + = I I I V V V V V ' = n n SE H SE C L I I I I I = + ' n n SE SE C H L = = = I I 1 + n
CF Autotransformer (3) UCF ' 1 , ' n n H L H L = = I I V V SE C L C L I I I V V + = = , , n n C SE SE C = = I I V V 1 ' + = n n n * * * * ) ' ( ' , L L L L L H H H L L L n n S I V I V I V S I V S = = = = = * * * * ) 1 ( ) ( ) ( C C C C C SE C C L L L n n I V I I V I I V I V S + = + = + = = ows the apparent power rating advantage of an autotransformer shows the apparent power rating advantage of an autotransformer over a conventional transformer

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CF Three Phase Transformer (1) UCF Three phase transformer bank composed of independent transformers
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Lecture 17 - UCF Non-ideal Transformer in Per Unit System...

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