From b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b Mon Sep 17 00:00:00 2001 From: priyanka Date: Wed, 24 Jun 2015 15:03:17 +0530 Subject: initial commit / add all books --- 1938/CH6/EX6.35/6_35.sce | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+) create mode 100755 1938/CH6/EX6.35/6_35.sce (limited to '1938/CH6/EX6.35/6_35.sce') diff --git a/1938/CH6/EX6.35/6_35.sce b/1938/CH6/EX6.35/6_35.sce new file mode 100755 index 000000000..d112e4257 --- /dev/null +++ b/1938/CH6/EX6.35/6_35.sce @@ -0,0 +1,25 @@ +clc,clear +printf('Example 6.35\n\n') + +V_L=6600,I_L=110,phi_1=acos(0.9) //lagging +kW=[400,1000,400,300]*10^3 +cosphi=[1,0.71,0.8,0.9] +tanphi=tan(acos(cosphi)) +kVAR=kW.*tanphi + +kW_total=kW(1)+kW(2)+kW(3)+kW(4) +kVAR_total=kVAR(1)+kVAR(2)+kVAR(3)+kVAR(4) + +phi_c=atan(kVAR_total/kW_total) //total power factor angle +load_1=sqrt(3)*V_L*I_L*cos(phi_1) + +kW_1=load_1 //active component of machine 1 +kVAR_1=kW_1*tan(phi_1) //reactive component of machine 1 +kW_2=kW_total - kW_1 //active component of machine 1 +kVAR_2=kVAR_total-kVAR_1 //reactive component of machine 2 + +phi_2=atan(kVAR_2/kW_2) +pf_2=cos(phi_2) //power factor of machine 2 + +printf('Output of second alternator= %.2f kW',kW_2/1000) +printf('\nPower factor of machine 2 = %.4f and lagging',pf_2) -- cgit