To obtain steady state transient and sub transient short circuit currents of a three phase alternator.

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Published on March 14, 2014

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To obtain steady state transient and sub transient short circuit currents of a three phase alternator.

EXPERIMENT – 3 OBJECT: - To obtain steady state transient and sub transient short circuit currents of a three phase alternator. CODE:- clc; clear all; f=50; w=2*pi*f; Xd1=0.5; Xd2=0.4; Xd=1.2; E=1.0; delta=0; Td1=0.35; Td2=1.0; id2=(sqrt(2)*E)/Xd2 id1=(sqrt(2)*E)/Xd1 id=(sqrt(2)*E)/Xd for t=0:0.0001:1 i=sqrt(2)*E*((1/Xd2-1/Xd1)*exp(-t/Td2)+(1/Xd1-1/Xd)*exp(-t/Td1)+(1/Xd))*sin(w*t+delta); hold all plot(t,i) end xlabel(' t(sec) ')

ylabel('i(amp)') RESULT :- id2 =3.5355 , id1 =2.8284 , id =1.1785 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 -4 -3 -2 -1 0 1 2 3 4 t(sec) i(amp)

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