function XX=SolveIt(deltdeltF,ddh,deltH,Init_Y,Ly,ContrlCount,Lx,Balance,Busnum,Loadi)
LxComa=FormLxComa(Lx);%Lx=deltF-deltH*Init_Y';
Lx=LxComa;
H=-deltdeltF+ddh;
aa=[
    H,deltH;
    deltH',zeros(size(Init_Y,2));
    ];
yy=[Lx;-Ly];
%% 平衡节点电压不变 
t=size(Loadi,1)*2;
aa(t+(Balance-1)*3+1,:)=0;
aa(t+(Balance-1)*3+2,:)=0;
aa(t+(Balance-1)*3+3,:)=0;
aa(:,t+(Balance-1)*3+1)=0;
aa(:,t+(Balance-1)*3+2)=0;
aa(:,t+(Balance-1)*3+3)=0;
%aa(t+Balance,t+Balance)=1;
aa=aa+sparse(t+(Balance-1)*3+1,t+(Balance-1)*3+1,ones(length(Balance),1),ContrlCount+2*Busnum*3,ContrlCount+2*Busnum*3);
aa=aa+sparse(t+(Balance-1)*3+2,t+(Balance-1)*3+2,ones(length(Balance),1),ContrlCount+2*Busnum*3,ContrlCount+2*Busnum*3);
aa=aa+sparse(t+(Balance-1)*3+3,t+(Balance-1)*3+3,ones(length(Balance),1),ContrlCount+2*Busnum*3,ContrlCount+2*Busnum*3);
%%
t=size(Loadi,1)*2+Busnum*3;
aa(t+(Balance-1)*3+1,:)=0;
aa(t+(Balance-1)*3+2,:)=0;
aa(t+(Balance-1)*3+3,:)=0;
aa(:,t+(Balance-1)*3+1)=0;
aa(:,t+(Balance-1)*3+2)=0;
aa(:,t+(Balance-1)*3+3)=0;
%aa(t+Balance,t+Balance)=1;
aa=aa+sparse(t+(Balance-1)*3+1,t+(Balance-1)*3+1,ones(length(Balance),1),ContrlCount+2*Busnum*3,ContrlCount+2*Busnum*3);
aa=aa+sparse(t+(Balance-1)*3+2,t+(Balance-1)*3+2,ones(length(Balance),1),ContrlCount+2*Busnum*3,ContrlCount+2*Busnum*3);
aa=aa+sparse(t+(Balance-1)*3+3,t+(Balance-1)*3+3,ones(length(Balance),1),ContrlCount+2*Busnum*3,ContrlCount+2*Busnum*3);
%%
dxdy=aa\yy;
%% KLU
%spy(aa)
%dxdy = klu(aa,'\',full(yy));
%%
dX=dxdy(1:ContrlCount);
dY=dxdy(ContrlCount+1:end);
XX=[
    dX;
    dY;    
];
end