linemodel.m

％ 该Matlab程序基于牛顿－拉夫逊算法

function [Y,Z]=LineModel(para_line,SB)
% LineModel computes the electrical model of power transistion line which
% input format is para_line=[1,n1,n2, r_unit, x_unit, b_unit, Len, UB]

r_unit=para_line(4); x_unit=para_line(5); b_unit=para_line(6);
Len=para_line(7); UB=para_line(8);

R=r_unit*Len;
X=x_unit*Len;
B=b_unit*Len;

Zb=UB^2/SB;
R=R/Zb;
X=X/Zb;
B=B*Zb;

Y=i*B/2;
Z=R+i*X;