15
11.5 Complex
Power (3)
Apparent Power, S = |S| = Vrms*Irms =
Real power, P = Re(S) = S cos(θv – θi)
Reactive Power, Q = Im(S) = S sin(θv – θi)
Power factor, pf = P/S = cos(θv – θi)
S
= P + j Q
