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| author | priyanka | 2015-06-24 15:03:17 +0530 |
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| committer | priyanka | 2015-06-24 15:03:17 +0530 |
| commit | b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b (patch) | |
| tree | ab291cffc65280e58ac82470ba63fbcca7805165 /1820/CH6/EX6.5 | |
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| -rwxr-xr-x | 1820/CH6/EX6.5/Example6_5.sce | 45 |
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diff --git a/1820/CH6/EX6.5/Example6_5.sce b/1820/CH6/EX6.5/Example6_5.sce new file mode 100755 index 000000000..919af5d8a --- /dev/null +++ b/1820/CH6/EX6.5/Example6_5.sce @@ -0,0 +1,45 @@ +// ELECTRIC POWER TRANSMISSION SYSTEM ENGINEERING ANALYSIS AND DESIGN
+// TURAN GONEN
+// CRC PRESS
+// SECOND EDITION
+
+// CHAPTER : 6 : DIRECT-CURRENT POWER TRANSMISSION
+
+// EXAMPLE : 6.5 :
+clear ; clc ; close ; // Clear the work space and console
+
+// GIVEN DATA
+X_C = 6.2292017 ; // commutating reactance when all 3 breakers are closed
+E_LN = 53.418803 * 10^3 ; // Wye-side volt rating
+V_d0 = 125 * 10^3 ; // voltage rating of bridge rectifier in V
+V_dr0 = V_d0 ; // Max continuos no-load direct voltage in V
+I = 1600 ; // current rating of bridge rectifier in A
+I_d = I ; // Max continuous current
+nom_kV = sqrt(3) * E_LN ; // Nominal kV_L-L
+X_tr = 0.10 ; //impedance of rectifier transformer in pu Ω
+alpha = 0 ; // delay angle α = 0 degree
+
+// CALCULATIONS
+// For case (a)
+E_m = sqrt(2) * E_LN ;
+u = acosd(1 - (2*X_C*I_d)/(sqrt(3)*E_m)); // overlap angle when delay angle α = 0 degree
+
+// For case (b)
+R_C = (3/%pi) * X_C ; // Equ commutation resistance per phase
+V_d = V_d0 * cosd(alpha) - R_C * I_d ; // dc voltage of rectifier in V
+
+// For case (c)
+cos_theta = V_d/V_d0 ; // Displacement or power factor of rectifier
+
+// For case (d)
+Q_r = V_d * I_d * tand( acosd(cos_theta) ) ; // magnetizing var I/P
+
+// DISPLAY RESULTS
+disp("EXAMPLE : 6.5 : SOLUTION :-") ;
+printf("\n (a) Overlap angle u of rectifier, u = %.2f degree\n",u) ;
+printf("\n (b) The dc voltage V_dr of rectifier, V_dr = %.2f V \n",V_d) ;
+printf("\n (c) Displacement factor of rectifier, cosθ = %.3f \n",cos_theta) ;
+printf("\n and θ = %.1f degree \n ",acosd(cos_theta)) ;
+printf("\n (d) Magnetizing var input to rectifier, Q_r = %.4e var \n",Q_r) ;
+
+printf("\n NOTE : In case(d) 7.6546e+07 var is same as 7.6546*10^7 var = 76.546 Mvar \n") ;
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