blob: 198bc3153d6c438eb733c5ded8cfc38445d5a931 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
|
//Chapter 12
//Example 12.1
//page 448
//To calculate steady state power limit
clear;clc;
Xdg=1*%i; //generator's
Xdm=1*%i; //motor's
Xt=0.1*%i; //transformers
Xl=0.25*%i; //transmission line's
Xc=-1*%i; //static capacitor's
Xi=1*%i; //inductive reactor
Eg=1.2; //generator's internal voltage
Em=1; //motor's internal voltage
//case(i) steady state power limit without reactor
P1=(abs(Eg)*abs(Em))/(abs(Xdg+Xt+Xl+Xt+Xdm));
printf('\n\n Steady state power limit without reactor = %0.5f pu',P1);
//case(ii) steady state power limit with capacitive reactor
//three arms of star connected reactances are
Xa=Xdg+Xt+Xl; //from generator side
Xb=Xdm+Xt; //from load side
Xc=Xc; //from reactor side
//converting star to delta
//reactance between generator side to load side is
Xab=(Xa*Xb+Xb*Xc+Xc*Xa)/Xc;
//power limit is
P2=(abs(Eg)*abs(Em))/(abs(Xab));
printf('\n\n Steady state power limit with capacitive reactor = %0.5f pu',P2);
//case(iii) steady state power limit with inductive reactor
//three arms of star connected reactances are
Xa=Xdg+Xt+Xl; //from generator side
Xb=Xdm+Xt; //from load side
Xc=Xi; //from reactor side
//converting star to delta
//reactance between generator side to load side is
Xab=(Xa*Xb+Xb*Xc+Xc*Xa)/Xc;
//power limit is
P3=(abs(Eg)*abs(Em))/(abs(Xab));
printf('\n\n Steady state power limit with inductive reactor = %0.5f pu',P3);
|
