Power (Ch.2)

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Author:
abalter
ID:
99496
Filename:
Power (Ch.2)
Updated:
2011-09-02 12:57:57
Tags:
equation power definition
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Description:
equations/information for Power System Analysis
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  1. Xrms = ?
    Xmax/sqrt(2)
  2. ej*theta = ?
    cos(theta)+jsin(theta)
  3. XL = ?
    w*L

    (w is omega)
  4. Xc = ?
    1/(w*C)

    (w is omega)
  5. P is called:
    average power, real power, active power
  6. P = ?
    VIR = VIcos(d-b)

    (d-b) is the difference in angles between V and I
  7. pR(t) = ?
    VIR{1+cos[2(wt+d)]}
  8. pL(t) = ?
    VILsin[2(wt+d)]
  9. pC(t) = ?
    -VICsin[2(wt+d)]
  10. Q is called ________ and measured in ________.
    reactive power; var
  11. Q = ?
    VIsin(d-b)
  12. pf = ?
    cos(d-b) = P/S = P/sqrt(P^2+Q^2)
  13. In a capacitive circuit, p.f. is ________.
    lagging
  14. In an inductive circuit, p.f. is ________.
    leading
  15. |S| is called ________ and measured in ________.
    apparent power; VA
  16. S is called ________ and measured in ________.
    complex power; VA
  17. S = ?
    VI* = VI<d-b = VIcos(d-b)+jVIsin(d-b) = P+jQ
  18. |S| = ?
    sqrt(P^2+Q^2)

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