Transient Stability Analysis of Single Machine Power System

TRANSIENT STABILITY ANALYSIS OF SINGLE MACHINE POWER SYSTEM

PROGRAM:

clc;

clear all;

t=0;

tf=0;

tfinal=0.5;

tc=0.625;

tstep=0.05;

m=2.52/(180*50);

i=2;

delta=21.64*pi/180;

ddelta=0;

time(1)=0;

angle(1)=21.64;

pm=0.9;

pmaxbf=2.44;

pmaxdf=0.88;

pmaxaf=2.00;

while t<tfinal

if(t==tf)

paminus=0.9-pmaxbf*sin(delta);

paplus=0.9-pmaxdf*sin(delta);

paav=(paminus+paplus)/2;

pa=paav;

end

if(t==tc)

paminus=0.9-pmaxdf*sin(delta);

paplus=0.9-pmaxaf*sin(delta);

paav=(paminus+paplus)/2;

pa=paav;

end

if(t>tf&t<tc)

pa-pm-pmaxdf*sin(delta);

end

if(t>tc)

end

t,pa

ddelta=ddelta+(tstep*tstep*pa/m);

delta=(delta*180/pi+ddelta)*pi/180;

deltadeg=delta*180/pi;

    t=t+tstep;

time(i)=t;

ang(i)=deltadeg;

ang(i)=deltadeg;

    i=i+1;

end

axis([0 0.6 0 160])

plot(time,ang,'ko-')