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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 12.3
//Scilab Version - 6.0.0 ; OS - Windows
clc;
clear;
M=500; //MVA rating of the generator
f=60; //requency in Hertz
R=0.05; //Regulation constant in pu
delF=0.01; //Increase in frequency in Hertz
delFpu=delF/f; //Frequency increase in pu
delPref=0; //Since fixed reference power setting is assumed
delPmpu=delPref-(1/R)*delFpu //Change in mechanical power in pu
delPm=delPmpu*M; //Actual value of mechanical power in MW
printf('The turbine mechanical power output decreases by %.3f MW.',abs(delPm))
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