Question:- Related to Regulating Transformers.

kVA kW

Pu= 1

source together Transforma a series impedance

Two transformers in paralled connect two voltage

of 0.01 + jo-1 pu. Transformer 2 has a series impedance

of 0.015+ jo.1 Spu. Transformer 2 is top changing

transformer

ZT1-(0.01+jo 1) pu

K-1 e jog

ZT2= 6.015 + j0.15/pu

V₂= 1e jode

A) Fird real A reactive power delivered to source

at Bus2 if the transformer top is normal (1.0).

(B) Refeat is transformer topis set to be 0.95 on the

side facing lus 2.

(C) Repeat if the transformer top is set to create

a phose shift such that

Ctr_c=1e2.5deg