diff --git a/FormG.m b/FormG.m
index 3c8ab70..24b84a8 100644
--- a/FormG.m
+++ b/FormG.m
@@ -1,6 +1,7 @@
 function Mat_G=FormG(Volt,PD,QD,Loadi,Vbi,mVolt,RealVolt,bigM,sigma)
 
 Mat_G=[
+    sparse(PD(Loadi));
     sparse(PD(Loadi));
     sparse(QD(Loadi));
     Volt'-bigM*Vbi-mVolt'-sigma*RealVolt';
diff --git a/FormLw.m b/FormLw.m
index 3a08974..8a311a7 100644
--- a/FormLw.m
+++ b/FormLw.m
@@ -17,7 +17,7 @@ realQD=QD0(Loadi);
 indQD=find(realQD>0);
 QDU(indQD(3:12:end))=1.55*realQD(indQD(3:12:end));
 QDU(indQD(9:12:end))=1.05*realQD(indQD(9:12:end));
-t1=([PDU',QDU',0*VoltU,50*ones(1,Busnum),1*ones(1,Busnum)])';
+t1=([PDU',PDU',QDU',0*VoltU,50*ones(1,Busnum),1*ones(1,Busnum)])';
 t2=Mat_G+Init_U'-t1;
 Lw=t2;
 
diff --git a/FormLz.m b/FormLz.m
index d6c46f8..996e03f 100644
--- a/FormLz.m
+++ b/FormLz.m
@@ -16,7 +16,7 @@ realQD=QD0(Loadi);
 indQD=find(realQD>0);
 QDL(indQD(3:12:end))=0.95*realQD(indQD(3:12:end));
 QDL(indQD(9:12:end))=0.95*realQD(indQD(9:12:end));
-t1=([PDL',QDL',-5000*ones(1,length(VoltL)),0*VoltL,0*ones(1,Busnum)])';
+t1=([PDL',PDL',QDL',-5000*ones(1,length(VoltL)),0*VoltL,0*ones(1,Busnum)])';
 t2=Mat_G-Init_L'-t1;
 Lz=t2;
 end
\ No newline at end of file
diff --git a/OPF.m b/OPF.m
index bf94e32..1e1310c 100644
--- a/OPF.m
+++ b/OPF.m
@@ -56,7 +56,7 @@ mQD=QD0;
 RealVolt=Volt0;
 mVolt=Volt0.*(1+normrnd(0,sigma,1,length(Volt0)));
 Vbi=sparse(0.1*ones(Busnum,1));
-bigM=50;
+bigM=10;
 while(abs(Gap)>Precision)
     if KK>kmax
         break;
diff --git a/OPF_Init.m b/OPF_Init.m
index b475997..824bfdf 100644
--- a/OPF_Init.m
+++ b/OPF_Init.m
@@ -1,7 +1,7 @@
 function [Volt,UAngel,Init_Z,Init_W,Init_L,Init_U,Init_Y,PG,QG,RestraintCount,wPG,wQG,wPD,wQD,PD,PD0,QD,randPDind,Loadi]=OPF_Init(Busnum,Balance,PG,QG,Volt,GenU,GenL,PVi,PGi,PVQU,PVQL,PD0,QD0,QD,PD)
 Loadi=find(QD~=0 | PD~=0);
 %Loadi=[1:Busnum]';
-RestraintCount=size(Loadi,1)*2+Busnum*2+Busnum; %约束条件数,放开所有QD
+RestraintCount=size(Loadi,1)*2+size(Loadi,1)+Busnum*2+Busnum; %约束条件数,放开所有QD
 t_Bal_volt=Volt(Balance);
 Volt=sparse(1*ones(1,Busnum));
 Volt(Balance)=t_Bal_volt;
diff --git a/func_deltG.m b/func_deltG.m
index d439ceb..ab97d12 100644
--- a/func_deltG.m
+++ b/func_deltG.m
@@ -1,18 +1,23 @@
 function deltG=func_deltG(Busnum,PVi,PGi,Loadi,PD,QD)
 sizeLoadi=size(Loadi,1);
+%dg3 PD-M*b-t-PD0
 dg3_dPD=sparse(1:size(Loadi,1),1:size(Loadi,1),ones(size(Loadi,1),1),size(Loadi,1),size(Loadi,1));
+%dg32 PD+M*B+t+PD0
+dg32_dPD=dg3_dPD;
 dg4_dPD=sparse(size(Loadi,1),length(Loadi));
 dg5_dPD=sparse(size(Loadi,1),Busnum);
 dg6_dPD=dg5_dPD;
 dg7_dPD=sparse(sizeLoadi,Busnum);
 %% 
 dg3_dQD=sparse(length(Loadi),length(Loadi));
+dg32_dQD=sparse(sizeLoadi,sizeLoadi);
 dg4_dQD=sparse(1:size(Loadi,1),1:size(Loadi,1),ones(size(Loadi,1),1),size(Loadi,1),size(Loadi,1));
 dg5_dQD=sparse(size(Loadi,1),Busnum);
 dg6_dQD=dg5_dQD;
 dg7_dQD=sparse(sizeLoadi,Busnum);
 %% 
 dg3_dx=sparse(2*Busnum,sizeLoadi);
+dg32_dx=sparse(2*Busnum,sizeLoadi);
 dg4_dx=sparse(2*Busnum,length(Loadi));
 dg5_dx=[sparse(1:Busnum,1:Busnum,ones(Busnum,1),Busnum,Busnum);
     sparse(Busnum,Busnum);
@@ -21,14 +26,15 @@ dg6_dx=dg5_dx;
 dg7_dx=sparse(2*Busnum,Busnum);
 %%
 dg3_dvbi=sparse(Busnum,sizeLoadi);
+dg32_dvbi=sparse(Busnum,sizeLoadi);
 dg4_dvbi=sparse(Busnum,length(Loadi));
 dg5_dvbi=sparse(-eye(Busnum,Busnum));
 dg6_dvbi=sparse(eye(Busnum,Busnum));
 dg7_dvbi=sparse(eye(Busnum,Busnum));
 %%
-deltG=[dg3_dPD,dg4_dPD,dg5_dPD,dg6_dPD,dg7_dPD;
-       dg3_dQD,dg4_dQD,dg5_dQD,dg6_dQD,dg7_dQD;
-       dg3_dx,dg4_dx,dg5_dx,dg6_dx,dg7_dx;
-       dg3_dvbi,dg4_dvbi,dg5_dvbi,dg6_dvbi,dg7_dvbi;
+deltG=[dg3_dPD,dg32_dPD,dg4_dPD,dg5_dPD,dg6_dPD,dg7_dPD;
+       dg3_dQD,dg32_dQD,dg4_dQD,dg5_dQD,dg6_dQD,dg7_dQD;
+       dg3_dx,dg32_dx,dg4_dx,dg5_dx,dg6_dx,dg7_dx;
+       dg3_dvbi,dg32_dvbi,dg4_dvbi,dg5_dvbi,dg6_dvbi,dg7_dvbi;
 ];
 end
\ No newline at end of file