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diff --git a/3872/CH3/EX3.1/Ex3_1.jpg b/3872/CH3/EX3.1/Ex3_1.jpg Binary files differnew file mode 100644 index 000000000..15f9d1395 --- /dev/null +++ b/3872/CH3/EX3.1/Ex3_1.jpg diff --git a/3872/CH3/EX3.1/Ex3_1.sce b/3872/CH3/EX3.1/Ex3_1.sce new file mode 100644 index 000000000..bbb2f21ef --- /dev/null +++ b/3872/CH3/EX3.1/Ex3_1.sce @@ -0,0 +1,32 @@ +//Book - Power system: Analysisi & Design 5th Edition
+//Authors - J. Duncan Glover, Mulukutla S. Sarma, and Thomas J.Overbye
+//Chapter-3 ;Example 3.1
+//Scilab Version - 6.0.0; OS - Windows
+
+clc;
+clear;
+
+Sr=20 //rated input power in kVA
+E1rated=480 //Rated voltage across winding 1 in Volts
+E2rated=120 //Rated voltage across winding 2 in Volts
+F=60 //frequency in Hertz
+Sl=15 //Load power in kVA
+pf = 0.8 // power factor lagging
+E2=118 //Load voltage in Volts
+
+at=E1rated/E2rated // Calculation of turns ratio
+E1=at*E2 // voltage across winding 1 in Volts
+theta=acos(pf)
+S2=Sl*exp(%i*theta)*1000 //complex load power in VA
+I2=conj(S2)/conj(E2) // Load current in Ampere
+Z2=E2/I2 // Load impedance in Ohms
+Z2r=at^2*Z2 //Load impedance referred to the 480V in Ohms
+S1=S2 //since complex power entering winding 1 is equal to the complex power leaving winding 2
+P1=real(S1)
+Q1=imag(S1)
+
+printf('The voltage across the 480V winding is %d Volts\n',E1);
+printf('The magnitude of load impedance is %.4f Ohms and its angle is %.4f degree\n',abs(Z2),atand(imag(Z2),real(Z2)));
+printf('The magnitude of load impedance referred to the 480V winding is %.4f Ohms and its angle is %.4f degree\n',abs(Z2r),atand(imag(Z2r),real(Z2r)));
+printf('The real power supplied to the 480V winding is %d W\n',P1);
+printf('The reactive power supplied to the 480V winding is %d VAR\n',Q1);
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