Electrical MATLAB

M-File Programming For Finding Per-Unit Impedance: -clc -clear -disp('CHANGING THE BASE OF PER-UNIT QUANTITIES') -x=input('given base MVA='); -y=input('given base KV='); -z=input('given per unit impedence='); -a=input('new base MVA='); -b=input('new base KV='); -disp('new per unit impedence='); -pu=z*(y/b)^2*(a/x) (Try it) M-File Programming For Finding Per-Unit Impedance: -clc -clear -disp('PERCENTAGE TRANSMISSION EFFICIENCY OF TX-LINE') -x=input('Receiving end voltage='); -y=input('Load current per-phase='); -z=input('Receiving end power factor='); -a=input('Sending end current='); -b=input('Resistance per-phase='); -disp('Percentage voltage transmission efficiency='); -PVTE=(((x*y*z)/((x*y*z)+(a^2*b)))*100 (try it)

M-File Programming For Subplotting: clc clear subplot(2,2,1) x=0:pi/1800:2*pi; y=sin(x); plot(x,y); title( 'Plot of sin(x)' ); grid subplot(2,2,2) x=0:pi/1800:2*pi; y=sin(x-2*pi/3) plot(x,y); title( 'Plot of sin(x-120)' ); grid subplot(2,2,3) x=0:pi/1800:2*pi; y=sin(x+2*pi/3) plot(x,y); title( 'Plot of sin(x-240)' ); grid (try it) M-File Programming For Three-Phase Voltage: clc clear t=0:pi/1800:2*pi; v1=100*cos(t); plot(t,v1); grid hold on v2=100*cos(t-2*pi/3); plot(t,v2); v3=100*cos(t+2*pi/3); plot (t,v3); title( 'Plotting Three-Phase Voltage of v1(t), v2(t) and v3(t)' ) xlabel ( 'Time in seconds' ) ylabel ( 'Voltage in volts' ) text (6,6, 'v1(t)' ) text (3,4, 'v2(t)' ) text (1,1, 'v3(t)' ) (try it) Discussion: · Plotting figure is also called graphing figure in MATLAB. · In this programming, we can easily