Phase voltage from unbalancd line voltages symmetrical components
Ean= Ea1(+ve seq)+ Ea2(-ve seq)+Ea0(zero seq)

Where Ea1= -j Eab1/√3
           Ea2= -j Eab2/√3
           Eao= -j Eabo/√3

Where Eab1 = 1/3 *( Eab + α Ebc+ α^2 Eca)