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| author | prashantsinalkar | 2017-10-10 12:27:19 +0530 |
|---|---|---|
| committer | prashantsinalkar | 2017-10-10 12:27:19 +0530 |
| commit | 7f60ea012dd2524dae921a2a35adbf7ef21f2bb6 (patch) | |
| tree | dbb9e3ddb5fc829e7c5c7e6be99b2c4ba356132c /3574/CH8/EX8.2/EX8_2.sce | |
| parent | b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b (diff) | |
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initial commit / add all books
Diffstat (limited to '3574/CH8/EX8.2/EX8_2.sce')
| -rw-r--r-- | 3574/CH8/EX8.2/EX8_2.sce | 47 |
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diff --git a/3574/CH8/EX8.2/EX8_2.sce b/3574/CH8/EX8.2/EX8_2.sce new file mode 100644 index 000000000..78d9c790d --- /dev/null +++ b/3574/CH8/EX8.2/EX8_2.sce @@ -0,0 +1,47 @@ +// Example 8.2
+// Determine (a) The minimum value of excitation that will maintain
+// synchronism (b) Repeat (a) using eq.(8.16) (c) Repeat (a) using eq.(8.21)
+// (d) Power angle if the field excitation voltage is increased to 175% of the
+// stability limit determined in (c)
+// Page No. 322
+
+clc;
+clear;
+close;
+
+// Given data
+Pin=40; // Input power
+Pin1phase=40/3; // Single phase power
+Xs=1.27; // Synchronous reactnace
+VT=220/sqrt(3); // Voltage
+delta=-90; // Power angle
+
+f=60; // Operating frequency
+P=4; // Number of poles
+Pmech=100; // Mechanical power
+eta=0.96; // Efficiency
+FP=0.80; // Power factor leading
+V=460; // Motor voltage
+Xs_Mag=2.72; // Synchronous reactnace magnitude
+Xs_Ang=90; // Synchronous reactnace magnitude
+deltaPull=-90; // Pullout power angle
+
+// (a) The minimum value of excitation that will maintain synchronism
+Ef=98; // From the graph (Figure 8.13)
+
+// (b) The minimum value of excitation using eq.(8.16)
+Ef816=-Pin*Xs*746/(3*VT*sind(delta));
+
+
+// (c) The minimum value of excitation using eq.(8.21)
+Ef821=Xs*Pin1phase*746/(VT);
+
+// (d) Power angle if the field excitation voltage is increased to 175%
+delta2=Ef816*sind(delta)/(1.75*Ef816);
+delta2=asind(delta2);
+
+// Display result on command window
+printf("\n The minimum value of excitation = %0.0f V ",Ef);
+printf("\n The minimum value of excitation using eq.(8.16) = %0.0f V ",Ef816);
+printf("\n The minimum value of excitation using eq.(8.21) = %0.0f V ",Ef821);
+printf("\n Power angle = %0.0f deg ",delta2);
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