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author | priyanka | 2015-06-24 15:03:17 +0530 |
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committer | priyanka | 2015-06-24 15:03:17 +0530 |
commit | b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b (patch) | |
tree | ab291cffc65280e58ac82470ba63fbcca7805165 /1445/CH7/EX7.25/Ex7_25.sce | |
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diff --git a/1445/CH7/EX7.25/Ex7_25.sce b/1445/CH7/EX7.25/Ex7_25.sce new file mode 100644 index 000000000..acb81a060 --- /dev/null +++ b/1445/CH7/EX7.25/Ex7_25.sce @@ -0,0 +1,66 @@ +//CHAPTER 7- SINGLE PHASE TRANSFORMER +//Example 25 + +disp("CHAPTER 7"); +disp("EXAMPLE 25"); + +//15kVA 2200/110 V transformer +//VARIABLE INITIALIZATION +va=25000; //power rating +v1=2200; //primary voltage in Volts +v2=110; //secondary voltage in Volts +f=50; +R1=1.75; +X1=2.6; +R2=0.0045; +X2=0.0075; + +//SOLUTION +// +//Primary resistance and leakage reactance referred to secondary +//R'1 & X'1 +//Secondary resistance and leakage reactance referred to primary +//R'2 & X'2 +//Equivalent resistance & leakage reactance referred to primary +//Re1 & Xe1 +//Equivalent resistance & leakage reactance referred to secondary +//Re2 & Xe2 +// +R_dash_2=R2*(v1/v2)^2; +R_e1=R1+R_dash_2; +X_dash_2=X2*(v1/v2)^2; +X_e1=X1+X_dash_2; +// +R_dash_1=R1*(v2/v1)^2; +R_e2=R2+R_dash_1; +X_dash_1=X1*(v2/v1)^2; +X_e2=X2+X_dash_1; +// +Z_e1=R_e1+X_e1*%i; +Z_e2=R_e2+X_e2*%i; +magZ_e1=sqrt(real(Z_e1)^2+imag(Z_e1)^2); +magZ_e2=sqrt(real(Z_e2)^2+imag(Z_e2)^2); +// +// +disp("SOLUTION (a)"); +disp(sprintf("The equivalent resistance referred to primary %.2f Ω",R_e1)); +disp("SOLUTION (b)"); +disp(sprintf("The equivalent resistance referred to secondaryy %.5f Ω",R_e2)); +disp("SOLUTION (c)"); +disp(sprintf("The equivalent leakage reactance referred to primary %.1f Ω",X_e1)); +disp("SOLUTION (d)"); +disp(sprintf("The equivalent leakage reactance referred to secondary %.3f Ω",X_e2)); +disp("SOLUTION (e)"); +disp(sprintf("The equivalent impedance referred to primary %.5f Ω",magZ_e1)); +disp("SOLUTION (f)"); +disp(sprintf("The equivalent impedance referred to secondary %.5f Ω",magZ_e2)); +// +//primary and secondary full load current and voltage relationship with power rating +I1=va/v1; //primary current +I2=va/v2; //secondary current +cuLoss=I2^2*R_e2; //copper loss or also as I1^2.R1 + I2^2.R2 +disp("SOLUTION (d)"); +disp(sprintf("The copper loss at full load %f W",cuLoss)); +disp(" "); +// +//END |