대칭좌표법

Question 1

대칭분 전압

Answer 1

V0 = 1/3 (Va + Vb + Vc)
V1 = 1/3 (Va + aVb + a^2Vc)
V2 = 1/3 (Va + a^2Vb + aVc)

Question 2

대칭분 전류

Answer 2

I0 = 1/3 (Ia + Ib + Ic)
I1 = 1/3 (Ia +aIb + a^2Ic)
I2 = 1/3 (Ia + a^2Ib + aIc)

Question 3

1선 지락사고

Answer 3

I0 = E/(Z0+ Z1 +Z2)
Ig = 3I0 = 3E/(Z0+ Z1 +Z2)

Question 4

선간단락사고

Answer 4

Is = {(a^2 - a) / (Z1 + Z2)} * E

Question 5

3상 단락사고

Answer 5

Is = Ia = E/Z1