The insertion of quadrature voltage v, into the line
voltage, will he at'$ maximum, for 50' degrees phase
shift, and it is equal to:
Ve =(138kV/&)*(2*siny) =67.33kV
The series unit ratio is calculated as K = 67.579kV /
53.387kV = 1.265, meaning that a voltage of 67.33kV /
1.265 = 53.22 kV must he applied to the secondary of
the series unit transformer, to produce 50" phase shlft. I
The Beaver Creek's PAR is equipped with 33 tap LTC,
which provides angle change of 3.125" degrees per tap
or quadrature voltage of 53.22/16 =3326 V per tap.