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Questions and Answers
What is the average power expression for the given instantaneous power?
What is the average power expression for the given instantaneous power?
- $P = V_m I_m \cos(\theta_v - \theta_i) + V_m I_m \cos(2\omega t + \theta_v + \theta_i)$
- $P = \frac{V_m I_m}{8} \cos(\theta_v - \theta_i)$
- $P = V_m I_m \cos(\theta_v - \theta_i) + V_m I_m \cos(2\omega t - \theta_v + \theta_i)$
- $P = \frac{V_m I_m}{2} \cos(\theta_v - \theta_i)$ (correct)
What is the complex power formula in terms of voltage and current?
What is the complex power formula in terms of voltage and current?
- $S = P + jQ$
- $S = V I \cos(\theta) + j V I$
- $S = V I$
- $S = V I \cos(\theta) + j V I \sin(\theta)$ (correct)
What does the real power component of complex power represent?
What does the real power component of complex power represent?
- Supports the system electromagnetically
- Single system frequency
- Ability to perform useful work (correct)
- Voltage profile
In normal system operation, which dynamics are decoupled from voltage/reactive-power dynamics?
In normal system operation, which dynamics are decoupled from voltage/reactive-power dynamics?
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What happens to real power and frequency dynamics when demand is greater than supply?
What happens to real power and frequency dynamics when demand is greater than supply?
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