__author__ = 'dmy'

import numpy

def getPowerflowEquation(y,Vm,Va,Pd,Qd,Pg,Qg):
    cmpV=Vm*numpy.exp(1j*Va)#复数电压
    S=cmpV*(numpy.dot(y.toarray(),cmpV).conj())
    P=numpy.real(S)+Pd-Pg
    Q=numpy.imag(S)+Qd-Qg
    return (P,Q)