Equality Constraints
The equality constraints (2) are the typical nonlinear power flow
equations.
(7)
(8)
where, i =1, …, NB; NB is the number of busses;PD is the load active power,QD is the load reactive power,δij is voltage angle between busses i andj , Gij and Bij are
the real and imaginary terms of bus admittance matrix corresponding toi- th row and j- th column, respectively.