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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 /3760/CH5/EX5.58/Ex5_58.sce | |
| parent | b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b (diff) | |
| download | Scilab-TBC-Uploads-7f60ea012dd2524dae921a2a35adbf7ef21f2bb6.tar.gz Scilab-TBC-Uploads-7f60ea012dd2524dae921a2a35adbf7ef21f2bb6.tar.bz2 Scilab-TBC-Uploads-7f60ea012dd2524dae921a2a35adbf7ef21f2bb6.zip | |
initial commit / add all books
Diffstat (limited to '3760/CH5/EX5.58/Ex5_58.sce')
| -rw-r--r-- | 3760/CH5/EX5.58/Ex5_58.sce | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/3760/CH5/EX5.58/Ex5_58.sce b/3760/CH5/EX5.58/Ex5_58.sce new file mode 100644 index 000000000..70efa2c40 --- /dev/null +++ b/3760/CH5/EX5.58/Ex5_58.sce @@ -0,0 +1,17 @@ +clc;
+p=3*10^6; // rated power of alternator
+v=11000; // rated voltage of alternator
+r=0.4; // per phase effective resistance
+vl=12370; // line to line voltage at zero leading power factor
+i=100; // load current at zero power factor
+pf=0.8; // lagging power factor at which voltage regulation has to be determined
+vt=vl/sqrt(3); // per phase terminal voltage
+Ef=v/sqrt(3); // per phase excitation EMF
+ia=p/(sqrt(3)*v); // full load phase current
+// for zero power factor load angle=0
+zs=(vt-Ef)/i; // synchronous impedance
+xs=sqrt(zs^2-r^2); // synchronous reactance
+// From phasor diagram
+Ef1=sqrt((Ef*pf+ia*r)^2+(Ef*sqrt(1-pf^2)+ia*xs)^2); // excitation EMF at 0.8 power factor
+vr=((Ef1-Ef)/Ef)*100;
+printf('Voltage regulation at %f lagging power factor is %f percent',pf,vr);
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