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diff --git a/3640/CH2/EX2.6/Ex2_6.sce b/3640/CH2/EX2.6/Ex2_6.sce
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+clc
+//the example below is an extension of Ex2_5
+//the following code contains userdefined fucntion complexstring 
+function s=complexstring(a)
+    
+    if imag(a)>=0 then
+        s=sprintf('%g+%gi',real(a),imag(a))
+    else
+        s=sprintf('%g%gi',real(a),imag(a))
+        
+    end
+    funcprot(0)
+endfunction
+Load=5000 //load of the plant in kW
+pf1=0.8 //power factor of load(lagging)
+Sp=Load+(Load*tan(acos(pf1)))*%i //original complex power of load in kVA
+disp('Sp='+complexstring(Sp)+'kVA')
+pf2=0.9 //new power factor
+Qp1=real(Sp)*tan(acos(0.9)) //reactive power,equal to Qp` in textbook
+mprintf("Qp`=%fkVAR\n",Qp1)//the ans vary due to roundoff error
+Qp=imag(Sp)
+mprintf("Qs=%fkVAR",Qp1-Qp)//KVAR to be supplied by synchronous condenser
+
+
+
+
+