function deltF=func_deltF(wVolt,wPD,wQD,PD0,PD,QD,QD0,Volt,mVolt,Busnum,Loadi)
t3=2*wPD.*(PD(Loadi)-PD0(Loadi));
t4=2*wQD.*(QD(Loadi)-QD0(Loadi));
t5=2*wVolt.*(Volt-mVolt);
deltF=[sparse(t3);
sparse(t4);
sparse(t5);
sparse(1*Busnum*3,1);
];
end
