
Modern Power System Analysis with MATLAB Applications
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with a total series impedance of R + j X and total line charging admittance of j B, will be mod-
elled by the equivalent circuit as shown in Fig. 1.4. Here, j
B
is termed as ‘Half Line Charging
Admittance (HLCA)’.
1.3.3 Modelling of Transformer
Transformer is a static device which is used to step-up or step-down the voltage level. Power trans-
formers and distribution transformers are used in the power system network. While arriving the
equivalent circuit of a transformer, we refer all quantities to either the primary or the secondary
side of the transformer.
For instance, if we refer all v ...