function deltG=func_deltG(Busnum,PVi,PGi)
dg1_dPg=eye(size(PGi,1));
dg2_dPg=zeros(size(PGi,1),size(PVi,1));
dg3_dPg=zeros(size(PGi,1),Busnum);
%% 
dg1_dQr=zeros(size(PVi,1),size(PGi,1));
dg2_dQr=eye(size(PVi,1));
dg3_dQr=zeros(size(PVi,1),Busnum);
%% 
dg1_dx=zeros(2*Busnum,size(PGi,1));
dg2_dx=zeros(2*Busnum,size(PVi,1));
dg3_dx=zeros(2*Busnum,Busnum);
for I=1:Busnum
    %dg3_dx(2*I,I)=1;ÔÝʱ¸ÄÒ»ÏÂ
    dg3_dx(I,I)=1;
end
%% 
deltG=[dg1_dPg,dg2_dPg,dg3_dPg;
       dg1_dQr,dg2_dQr,dg3_dQr;
       dg1_dx,dg2_dx,dg3_dx;
];