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+//Chapter 10
+//Example 10.4
+//page no 392
+//To draw the zero sequence networks of the system given in example 10.2
+clear;clc;
+
+//selecting generator rating as base in generator circuit
+
+mvab=25;
+kvGb=11;  //base voltage for generator
+kvTLb=kvGb*(121/10.8); //base voltage for TL
+kvMb=kvTLb*(10.8/121); //base voltage for motors
+
+//Calculation of zero sequence reactance
+
+xT0=0.0805; //zero sequence reactance of transformer
+xG0=0.06; //zero sequence reactance of generator
+
+//zero sequence reactanc eof motors
+xM1_0=0.06*(mvab/15)*(10/kvMb)^2; 
+xM2_0=0.06*(mvab/7.5)*(10/kvMb)^2;
+
+x_clr_0=3*2.5*(mvab/kvGb^2); // Reactance of current limiting reactors to be icluded in the zero sequence network
+x_TL_0=300*(mvab/kvTLb^2); //Zero sequence reactance of TL
+
+printf('\n\nTransformer zero sequence reactance = %0.4f pu',xT0);
+printf('\nGenerator zero sequence reactances = %0.2f pu',xG0);
+printf('\nZero sequence reactance of motor 1 = %0.3f pu',xM1_0);
+printf('\nZero sequence reactance of motor 2 = %0.3f pu',xM2_0);
+printf('\nReactance of current limiting reactors = %0.3f pu',x_clr_0);
+printf('\nZero sequence reactance of transmission line = %0.3f pu\n\n',x_TL_0);
+
+disp('Zero sequence diagram has been drawn using XCOS,simulation has not been done as it is not being asked in the problem');
+\ No newline at end of file