电缆金属护套环流
ES2=2*w*I*10^(-7)*(sqrt(3)/2*log(m*S/GMRs)-j*1/2*log(S/m/GMRs));ES3=2*w*I*10^(-7)*(-sqrt(3)/2*log(m*S/GMRs)-j*1/2*log(n*n*S/m/GMRs));
E1=ES1*L1+ES2*L2+ES3*L3;
E2=ES1*L3+ES2*L1+ES3*L2;
E3=ES1*L2+ES2*L3+ES3*L1;
E1r=real(E1);E1f=imag(E1);
E2r=real(E2);E2f=imag(E2);
E3r=real(E3);E3f=imag(E3);%线芯电流引起的感应电势
XP=X1*L1+X1*L2+X2*L3;
XQ=X2*L1+X1*L2+X1*L3;
XR=X1*L1+X2*L2+X1*L3;
ZZ=zeros(6,6);%系数矩阵
ZZ(1,1)=RA;ZZ(1,2)=RB;ZZ(1,3)=RB;ZZ(1,4)=-X;ZZ(1,5)=-XP;ZZ(1,6)=-XQ;
ZZ(2,1)=RB;ZZ(2,2)=RA;ZZ(2,3)=RB;ZZ(2,4)=-X1;ZZ(2,5)=-X;ZZ(2,6)=-XR;
ZZ(3,1)=RB;ZZ(3,2)=RB;ZZ(3,3)=RA;ZZ(3,4)=-XQ;ZZ(3,5)=-XR;ZZ(3,6)=-X;
ZZ(4,1)=X;ZZ(4,2)=XP;ZZ(4,3)=XQ;ZZ(4,4)=RA;ZZ(4,5)=RB;ZZ(4,6)=RB;
ZZ(5,1)=XP;ZZ(5,2)=X;ZZ(5,3)=XR;ZZ(5,4)=RB;ZZ(5,5)=RA;ZZ(5,6)=RB;
ZZ(6,1)=XQ;ZZ(6,2)=XR;ZZ(6,3)=X;ZZ(6,4)=RB;ZZ(6,5)=RB;ZZ(6,6)=RA;
E=;
II=inv(ZZ)*E;
IS1=II(1,1)+j*II(4,1);
IS2=II(2,1)+j*II(5,1);
IS3=II(3,1)+j*II(6,1);
IS4=IS1+IS2+IS3;
abs(IS1)
abs(IS2)
abs(IS3)
abs(IS4)
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