blob: 13610f8ae412343846be713d9984fc91e313232a (
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
|
// ELECTRIC POWER TRANSMISSION SYSTEM ENGINEERING ANALYSIS AND DESIGN
// TURAN GONEN
// CRC PRESS
// SECOND EDITION
// CHAPTER : 10 : PROTECTIVE EQUIPMENT AND TRANSMISSION SYSTEM PROTECTION
// EXAMPLE : 10.7 :
clear ; clc ; close ; // Clear the work space and console
// GIVEN DATA
Z_r1 = 0.0415692 + %i*0.4156922 ; // Required zone 1 setting . From result of exa 10.6
Z_r2 = 0.0623538 + %i*0.6235383 ; // Required zone 2 setting . From result of exa 10.6
Z_r3 = 0.1299038 + %i*1.2990381 ; // Required zone 3 setting . From result of exa 10.6
// CALCULATIONS
// For case (a)
theta1 = atand(imag(Z_r1),real(Z_r1)) ;
Z_1 = abs(Z_r1)/cosd(theta1 - 30) ; // Zone 1 setting of mho relay R_12
// For case (b)
theta2 = atand(imag(Z_r2),real(Z_r2)) ;
Z_2 = abs(Z_r2)/cosd(theta2 - 30) ; // Zone 2 setting of mho relay R_12
// For case (b)
theta3 = atand(imag(Z_r3),real(Z_r3)) ;
Z_3 = abs(Z_r3)/cosd(theta3 - 30) ; // Zone 3 setting of mho relay R_12
// DISPLAY RESULTS
disp("EXAMPLE : 10.7 : SOLUTION :-") ;
printf("\n (a) Zone 1 setting of mho relay R_12 = %.4f Ω(secondary) \n",Z_1) ;
printf("\n (b) Zone 2 setting of mho relay R_12 = %.4f Ω(secondary) \n",Z_2) ;
printf("\n (c) Zone 3 setting of mho relay R_12 = %.4f Ω(secondary) \n",Z_3) ;
|
