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+//Book - Power System: Analysis & Design 5th Edition
+//Authors - J. Duncan Glover, Mulukutla S. Sarma, and Thomas J. Overbye
+//Chapter - 12 ; Example 12.5
+//Scilab Version - 6.0.0 ; OS - Windows
+
+clc;
+clear;
+
+f=60;                    //Frequency of the system in Hertz
+G1=2000;                 //Total generation of area 1 in MW
+G2=4000;                 //Total generation of area 2 in MW
+beta1=700;               //Area frequency response characteristic of area 1 in MW/Hz
+beta2=1400;              //Area frequency response characteristic of area 2 in MW/Hz
+delPD1=100;              //Load increment of area 1 in MW
+delPD2=0;
+
+//WITHOUT LFC
+delF=(delPD1+delPD2)/(-(beta1+beta2));    //Frequency Change in Hertz
+delPm1=-beta1*delF;                       //Change in power of area 1
+delPm2=-beta2*delF;                       //Change in power of area 2
+delPtie1=-delPm2                          //Tie line power flow from area 1 to 2
+delPtie2=delPm2                          //Tie line power flow from area 2 to 1
+
+disp('RESULTS WITHOUT LFC')
+printf('\nThe steady state frequency error is %.4f Hz',delF)
+printf('\nThe tie-line power flow from area 1 is %.4f MW',delPtie1)
+printf('\nThe tie-line power flow from area 2 is %.4f MW\n',delPtie2)
+
+//WITH LFC
+
+delFl=0/(beta1+beta2);              //Frequency Change in Hertz (as ACE1+ACE2=0)
+delPm1=-beta1*delFl;                //Change in power of area 1
+delPm2=-beta2*delFl;                //Change in power of area 2
+delPtie1=-delPm2                    //Tie line power flow from area 1 to 2
+delPtie2=delPm2                     //Tie line power flow from area 2 to 1
+
+disp('RESULTS WITH LFC')
+printf('\nThe steady state frequency error is %.4f Hz',delFl)
+printf('\nThe tie-line power flow from area 1 is %.4f MW',delPtie1)
+printf('\nThe tie-line power flow from area 2 is %.4f MW',delPtie2)