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| author | priyanka | 2015-06-24 15:03:17 +0530 |
|---|---|---|
| committer | priyanka | 2015-06-24 15:03:17 +0530 |
| commit | b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b (patch) | |
| tree | ab291cffc65280e58ac82470ba63fbcca7805165 /1092/CH8/EX8.13 | |
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| -rwxr-xr-x | 1092/CH8/EX8.13/Example8_13.sce | 59 |
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diff --git a/1092/CH8/EX8.13/Example8_13.sce b/1092/CH8/EX8.13/Example8_13.sce new file mode 100755 index 000000000..3ddf06d9b --- /dev/null +++ b/1092/CH8/EX8.13/Example8_13.sce @@ -0,0 +1,59 @@ +// Electric Machinery and Transformers
+// Irving L kosow
+// Prentice Hall of India
+// 2nd editiom
+
+// Chapter 8: AC DYNAMO TORQUE RELATIONS - SYNCHRONOUS MOTORS
+// Example 8-13
+
+clear; clc; close; // Clear the work space and console.
+
+// Ex.8-12 PF
+cos_theta = 0.6 ; // PF lagging
+
+// Given data
+S_conjugate = 1000 ; // Apparent complex power in kVA
+cos_theta_f = 1.0 ; // unity PF
+sin_theta_f = sqrt( 1 - (cos_theta_f)^2 );
+
+// Calculated values from Ex.8-11
+P_o = 600 ; // Active power dissipated by the load in kW
+Q_o = 800 ; // Inductive reactive quadrature power -
+// - drawn from and returned to the supply
+
+// Calculations :
+
+// case a
+P_f = S_conjugate * cos_theta_f ; // Active power dissipated by the load in kW
+
+// case b
+Q_f = S_conjugate * sin_theta_f ; // Reactive quadrature power drawn from -
+// - and returned to the supply
+
+// case c
+P_a = P_f - P_o ; // Additional active power in kW that may be supplied to -
+// - new customers
+
+// case d
+jQ_a = %i * ( Q_f ) - %i * ( Q_o ); // Correction kvar required to raise PF -
+// -from 0.6 to o.8 lagging
+Q_a = -abs(jQ_a); //
+
+// case e
+S_c_conjugate = 0 - jQ_a ; // Rating of correction capacitors needed for case d
+
+// Display the results
+
+disp("Example 8-13 Solution : ");
+printf(" \n a: P_f = %d kW \n ", P_f );
+printf(" \n b: +jQ_f in kvar = ");disp(%i*Q_f);
+printf(" \n c: P_a = %d kW \n ", P_a );
+printf(" \n d: jQ_a in kvar = ");disp(jQ_a)
+printf(" \n e: S_c_conjugate = %d kVA \n ", abs(S_c_conjugate) );
+printf(" \n f: The power tabulation grid is shown below.\n");
+printf(" \n \t\t P \t ±jQ \t S* ");
+printf(" \n \t\t(kW) \t(kvar) \t(kVA) \t cosӨ ");
+printf(" \n ___________________________________________");
+printf(" \n Original : \t %d \t +j%d \t %d \t %.1f ",P_o ,Q_o ,S_conjugate,cos_theta);
+printf(" \n Added : \t %d \t %dj \t __ \t __",P_a ,Q_a );
+printf(" \n Final : \t %d \t +j%d \t %d \t %.1f",P_f ,Q_f ,S_conjugate,cos_theta_f);
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