BUS ADMITTANCE MATRIX - PART – 14 - MODIFICATION OF BUS ADMITTANCE MATRIX WHEN A TRANSFORMER IS ADDED IN A LINE

Let us assume that a transformer is connected in a line between p and q in a multibus system. The transformer is represented a series admittance Ypq. Nominal tap ratio 1 : a and 't' is the imaginary bus between the ratio and admittance of the transformer.