Voltage/VAR/Frequency Control Quiz

$p(t) = [\cos(\theta_{vi}) - \cos(2\omega t - \theta_{vi})] / 2$

$p(t) = V_m I_m \cos(\theta_v - \theta_i) + V_m I_m \cos(2\omega t + \theta_v + \theta_i) / 2$ (correct)

$p(t) = P + Q(t)$

$p(t) = S = V I cos\theta + j V I sin\theta$

Real power, P, able to perform useful work

Generators produce complex power S = P + jQ (correct)

Voltage profile, V

Reactive power, Q, supports the system electromagnetically

Real-power and frequency dynamics (correct)

Instantaneous power and real power

Voltage and frequency dynamics

Voltage and reactive-power dynamics

<p>$P = V_m I_m \cos(\theta_v - \theta_i) / 8$</p> Signup and view all the answers

<p>$S = V I = V\angle0 I\angle\theta = VI\angle\theta$</p> Signup and view all the answers