function deltF=func_deltF(PG,QG,PVi,PGi,wPG,wQG,wPD,wQD,PG0,QG0,PD0,PD,QD,QD0,Busnum,Loadi)

t1=2*wPG.*(PG(PGi) - PG0(PGi) );
t2=2*wQG.*(QG(PVi) - QG0(PVi) );
t3=2*wPD.*(PD(Loadi)-PD0(Loadi));
t4=2*wQD.*(QD(Loadi)-QD0(Loadi));
deltF=[
    sparse(t1);
    sparse(t3);
    sparse(t4);
    sparse(2*Busnum,1);
];

end