Power (Ch.2)

X_{rms = ?}

X_max/sqrt(2)
e^j*theta = ?

cos(theta)+jsin(theta)
X_L= ?

w*L

(w is omega)
X_c = ?

1/(w*C)

(w is omega)
P is called:

average power, real power, active power
P = ?

VI_R = VIcos(d-b)

(d-b) is the difference in angles between V and I
p_R(t) = ?

VI_R{1+cos[2(wt+d)]}
p_L(t) = ?

VI_Lsin[2(wt+d)]
p_C(t) = ?

-VI_Csin[2(wt+d)]
Q is called ________ and measured in ________.

reactive power; var
Q = ?

VIsin(d-b)
pf = ?

cos(d-b) = P/S = P/sqrt(P^2+Q^2)
In a capacitive circuit, p.f. is ________.

lagging
In an inductive circuit, p.f. is ________.

leading
|S| is called ________ and measured in ________.

apparent power; VA
S is called ________ and measured in ________.

complex power; VA
S = ?

VI* = VI<d-b = VIcos(d-b)+jVIsin(d-b) = P+jQ
|S| = ?

sqrt(P^2+Q^2)

Author

abalter

ID

99496

Card Set

Power (Ch.2)

Description

equations/information for Power System Analysis

Updated

2011-09-02T16:57:57Z