diff options
Diffstat (limited to '1319/CH3/EX3.10/3_10.sce')
-rw-r--r-- | 1319/CH3/EX3.10/3_10.sce | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/1319/CH3/EX3.10/3_10.sce b/1319/CH3/EX3.10/3_10.sce new file mode 100644 index 000000000..c5e3f0cde --- /dev/null +++ b/1319/CH3/EX3.10/3_10.sce @@ -0,0 +1,57 @@ +// Two wattmeter power dertermination for a delta system
+
+clc;
+clear;
+
+V=250; // Phase Voltage
+
+// Phase Voltage in RYB sequnce
+Vry=V*(expm(%i*0));
+Vyb=V*(expm(%i*-2*%pi/3));
+Vbr=V*(expm(%i*2*%pi/3));
+
+// Resitances of the RYB limbs
+Rry=10+%i*10;
+Ryb=20-%i*15;
+Rbr=10+%i*20;
+
+// Phase Currents in RYB
+
+Iry= Vry/Rry;
+Iyb= Vyb/Ryb;
+Ibr= Vbr/Rbr;
+
+// Phase Current Angles wrt to Vr
+
+ary=atand(imag(Iry)/real(Iry));
+ayb=atand(imag(Iyb)/real(Iyb));
+abr=atand(imag(Ibr)/real(Ibr));
+
+// Line Currents in RYB
+Ir=Iry-Ibr;
+Iy=Iyb-Iry;
+Ib=Ibr-Iyb;
+
+W1=real(-Vbr*conj(Ir));
+W2=real(Vyb*conj(Iy));
+
+Wt= W1+W2; // Total Power
+
+printf('i)\n')
+printf(' The Currents in each branch are : \n')
+printf(' Branch RY = %g/_%g A \n',abs(Iry),ary)
+printf(' Branch YB = %g/_%g A \n',abs(Iyb),ayb)
+printf(' Branch BR = %g/_%g A \n',abs(Ibr),abr)
+
+printf('ii) \n')
+printf('The line currents in RYB sequence are : \n')
+disp(Ir,' R line :')
+printf(' Magnitude = %g A \n',abs(Ir))
+disp(Iy,' Y line :')
+printf(' Magnitude = %g A\n',abs(Iy))
+disp(Ib,' B line :')
+printf(' Magnitude = %g A\n \n',abs(Ib))
+
+// Precision is more, The Text book includes round off error
+printf(' W1 = %g W\n',W1)
+printf(' W2 = %g W\n',W2)
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