power system lab programs

8/9/2019 power system lab programs

1/7

ASSIGNMENT NO. 1

Ans. 1

MATLAB Program

r = input('radius of conductor in cm') ;

r1= 0.7788*r ;

GMRL = ((r1^7)*((2*r)^6)*((2*r)^12)*((4*r)^6)*((2*r)^6)*((2*sqrt(2)*r)^12))^(1/49)

GMRC = ((r^7)*((2*r)^6)*((2*r)^12)*((4*r)^6)*((2*r)^6)*((2*sqrt(2)*r)^12))^(1/49)

Result

>> Q.1

radius of conductor in cm 0.9

GMRL =

1.8641

GMRC =

1.9319

Ans.2

MATLAB Program

d = input('bundle spacing in cm');

r = input ('radius of conductors in cm');

r1= 0.7788*r;

display('for square coniguration')

GMRL = (d*d*sqrt(2)*d*r1)^(1/4)

GMRC = (d*d*sqrt(2)*d*r)^(1/4)

Result

>> Q.2

bundle spacing in cm 25

radius of conductors in cm 1.5

for square configuration

GMRL =

12.6754


2/7

GMRC =

13.4929

Ans

3(a)

MATLAB Program

d12 = input('spacing b/w 1 & 2');



r = input('radius of conductor in cm');

r1 = 0.7788*r;

display('for single conductor');

GMD = (d12*d23*d13)^(1/3);

GMRL = r1;

GMRC = r;

L = 2*(10^(-7))* log (GMD/GMRL)

C = 2*pi*8.85*(10^(-12))/ log (GMD/GMRC)

display('for bundled conductor');

d = input('spacing b/w bundled conductors');

display(' for equilateral configuration');

GMRL = (r1*d*d)^(1/3);

GMRC = (r*d*d)^(1/3);

L = 2*(10^(-7))* log (GMD/GMRL)

C = 2*pi*8.85*(10^(-12))/ log (GMD/GMRC)

display(' for square configuration');

GMRL = (r1*d*d*sqrt(2))^(1/4);

GMRC = (r*d*d*sqrt(2))^(1/4);

L = 2*(10^(-7))* log (GMD/GMRL)

C = 2*pi*8.85*(10^(-12))/log (GMD/GMRC)

Result

spacing b/w 1 & 2 in cm 200




for single conductor

L =

1.1386e-006

C =

1.0216e-011

for bundled conductor


3/7

spacing b/w bundled conductors in cm 25

for equilateral configuration

L =

6.6202e-007

C =

1.7233e-011

for square configuration

L =

7.4607e-007

C =

1.5160e-011

Ans3(b)

(I)

MATLAB Program




r = input('radius of conductor in cm');

r1 = 0.7788*r;display('for single circuit');

GMD = (d12*d23*d13)^(1/3);

GMRL = r1;

GMRC = r;

L = 2*(10^(-7))* log (GMD/GMRL)

C = 2*pi*8.85*(10^(-12))/ log (GMD/GMRC)

Result


spacing b/w 2 & 3 in cm 200spacing b/w 1 & 3 in cm 150


for single circuit

L =

1.1386e-006

C =

1.0216e-011


4/7

(II)

MATLAB Program

r = input('radius of conductor');

n = input('spacing between a1 & a2');m = input('spacing between a1 & b2');

h = input('spacing between c1 & a2');

D = input('spacing b/w a1 & b1 or b1 & c1');

r1 = 0.7788*r;

display('for calculation of inductance')

GMRa = sqrt(r1*n);

GMRb = sqrt(r1*h);

GMRc = sqrt(r1*n);

GMRL = (GMRa*GMRb*GMRc)^(1/3)

GMDab = sqrt(D*m);

GMDbc = sqrt(D*m);GMDca = sqrt(2*D*h);

GMD = (GMDab*GMDbc*GMDca)^(1/3)

L = 2*10^(-7)* log (GMD/GMRL)

display('for calculation of capacitance')

GMRa = sqrt(r*n);

GMRb = sqrt(r*h);

GMRc = sqrt(r*n);

GMRC = (GMRa*GMRb*GMRc)^(1/3)

C = 2*pi*8.85*10^(-12)/log(GMD/GMRC)

Result

radius of conductor 0.9

spacing between a1 & a2 in cm 500

spacing between a1 & b2 in cm 300

spacing between c1 & a2 in cm 500

spacing b/w a1 & b1 or b1 & c1 in cm 250

for calculation of inductance

GMRL =

18.7206

GMD =

334.7165

L =

5.7673e-007


5/7

for calculation of capacitance

GMRC =

21.2132

C =

2.0157e-011

(III)

MATLAB Program

display('for horizontal configuration')

r = input('radius of conductor');d = input('spacing b/w two phases')

r1 = 0.7788*r;


GMRa = sqrt(r1*5*d)

GMRb = sqrt(r1*3*d);

GMRc = sqrt(r1*d);

GMRL = (GMRa*GMRb*GMRc)^(1/3)

GMDab = sqrt(d*d*4);

GMDbc = sqrt(d*2*d);

GMDca = sqrt(2*d*3*d);

GMD = (GMDab*GMDbc*GMDca)^(1/3)L = 2*10^(-7)* log (GMD/GMRL)


GMRa = sqrt(r*5*d)

GMRb = sqrt(r*3*d);

GMRc = sqrt(r*d);


C = 2*pi*8.85*10^(-12)/log(GMD/GMRC)

Result

for horizontal configuration


spacing b/w two phases in cm 350


GMRa =

35.0230


6/7

GMRL =

24.5971

GMD =

667.2290

L =

6.6010e-007


GMRa =

39.6863

GMRC =

27.8722

C =

1.7511e-011

Ans4

MATLAB Program -

r = input('radius of conductor');

Sa1c2 = input('spacing between a1 & c2');

Sb1b2 = input('spacing between b1 & b2');

Sc1a2 = input('spacing between c1 & a2');H12 = input('H12');

H23 = input('H23');


r1 = 0/7788*r;

Da1a2 = sqrt((Sa1c2^2)+((H12+H23)^2));

Dc1c2 = sqrt((Sc1a2^2)+((H12+H23)^2));

Db1b2 = Sb1b2;

GMRa = sqrt(r1*Da1a2);

GMRb = sqrt(r1*Db1b2);

GMRc = sqrt(r1*Dc1c2);

GMRL = (GMRa*GMRb*GMRc)^(1/3)Da1b1 = sqrt((H12^2)+((Sb1b2-Sa1c2)/2)^2);


7/7

Da1b2 = sqrt((H12^2)+((Sb1b2+Sa1c2)/2)^2);

Db1c1 = sqrt((H23^2)+((Sb1b2-Sc1a2)/2)^2);

Db1c2 = sqrt((H23^2)+((Sb1b2+Sc1a2)/2)^2);

GMDab = sqrt(Da1b1*Da1b2);

GMDbc = sqrt(Db1c1*Db1c2);

GMDca = sqrt(Sa1c2*Sc1a2);GMD = (GMDab*GMDbc*GMDca)^(1/3)

L = 2*10^(-7)* log (GMD/GMR)


GMRa = sqrt(r*Da1a2);

GMRb = sqrt(r*Db1b2);

GMRc = sqrt(r*Dc1c2);


C = 2*pi*8.85*10^(-12)/log(GMD/GMRC)

Result

diameter of conductor 4.4069

spacing between a1 & c2 16

spacing between b1 & b2 24

spacing between c1 & a2 17

H12 10

H23 9


GMRL =

6.5198

GMD =

15.5545

L =

1.7390e-007


GMRC =

7.3879

C =

7.4689e-011

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power system lab programs