function Lw=FormLw(Mat_G,Init_U,Busnum,Loadi)
VoltU=sparse(1.2*ones(Busnum,1));
PDU=sparse(2*ones(length(Loadi),1));
QDU=sparse(2*ones(length(Loadi),1));
t1=[PDU;
    QDU;
    VoltU];
t2=Mat_G+Init_U-t1;
Lw=t2;
end