Stevenson J. Power system analysis

80 CHAPTER 2 TRANSFORMERS

When two transformers are in parallel, we can vary the distribution of reactive

power between the transformers by adjusting the voltage-magnitude ratios.

When two paralleled transformers of equal kilovoltamperes do not share the

kilovoltamperes equally because their impedances dier, the kilovoltamperes

may be more nearly equalized by adjustment of the voltage-magnitude ratios

through tap changing.

Example 2.14. Repeat Example 2.13 except that Th includes hoth a transformer

having the same turns ratio as Ta a

d a regulating transformer with a phase shift

of 3

(t =