Critical Clearing Angle with Loss of Transmission Capacity

[@vivael18]

in the final expression, nominator is: Pm( dmax + d0) + Pmax2*cos(d0) - Pmax3*cos(dmax). Denominator is: Pmax2 - Pmax3

[@harendrakumarjatav6726]

sir graph Pmax3 and Pmax2 wrong liya..according to formula