From b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b Mon Sep 17 00:00:00 2001
From: priyanka
Date: Wed, 24 Jun 2015 15:03:17 +0530
Subject: initial commit / add all books

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 1820/CH6/EX6.4/Example6_4.sce | 49 +++++++++++++++++++++++++++++++++++++++++++
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+// ELECTRIC POWER TRANSMISSION SYSTEM ENGINEERING ANALYSIS AND DESIGN
+// TURAN GONEN
+// CRC PRESS
+// SECOND EDITION
+
+// CHAPTER : 6 : DIRECT-CURRENT POWER TRANSMISSION
+
+// EXAMPLE : 6.4 :
+clear ; clc ; close ; // Clear the work space and console
+
+// GIVEN DATA
+E_LN = 53.418803 ; // Wye-side kV rating . From exa 6.3
+I = 1600 ; // current rating of bridge rectifier in A
+I_d = I ; // Max continuous current in A
+X_tr = 0.10 ; // impedance of rectifier transformer in pu Ω
+
+// For case (a)
+sc_MVA1 = 4000 ; // short-ckt MVA
+
+// For case (b)
+sc_MVA2 = 2500 ; // short-ckt MVA
+
+// For case (c)
+sc_MVA3 = 1000 ; // short-ckt MVA
+
+// CALCULATIONS
+nom_kV = sqrt(3) * E_LN ; // Nominal kV_L-L
+I_1ph = sqrt(2/3) * I_d ; // rms value of wye-side phase current
+E_LN1 = E_LN * 10^3 ; // Wye-side rating in kV
+X_B = (E_LN1/I_1ph) ; // Associated reactance base in Ω
+
+// For case (a)
+X_sys1 = nom_kV^2/sc_MVA1 ; // system reactance in Ω
+X_tra = X_tr * X_B ; // Reactance of rectifier transformer
+X_C = X_sys1 + X_tra ; // Commutating reactance in Ω
+
+// For case (b)
+X_sys2 = nom_kV^2/sc_MVA2 ; // system reactance in Ω
+X_C2 = X_sys2 + X_tra ; // Commutating reactance in Ω
+
+// For case (b) When breaker 1 & 2 are open
+X_sys3 = nom_kV^2/sc_MVA3 ; // system reactance in Ω
+X_C3 = X_sys3 + X_tra ; // Commutating reactance in Ω
+
+// DISPLAY RESULTS
+disp("EXAMPLE : 6.4 : SOLUTION :-") ;
+printf("\n (a) Commutating reactance When all three breakers are closed, X_C = %.4f Ω \n",X_C) ; 
+printf("\n (b) Commutating reactance When breaker 1 is open, X_C = %.4f Ω \n",X_C2) ;
+printf("\n (c) Commutating reactance When breakers 1 and 2 are open, X_C = %.4f Ω \n",X_C3) ;
-- 
cgit