I recently learned through my textbook about AC circuits, particularly the concepts of average power, reactive power, effective/RMS values, PF factor, complex power, etc.
The book started to delve into real-world applications of these concepts in industry and I'd like some clarification.
1. Why do we need reactive power in circuits in general and particularly in the power industry? What use do capacitors/inductors play?
2. When a company wants to increase its PF factor for reduced cost, one way to do so is by installing capacitors in parallel. Mathematically, I see the effect of this is to add a negative reactive power component to the total power, thus making the PF factor closer to unity (since circuits tend to be inductive in nature; see question 3). But what is the intuitive explanation for this? I've read online (but not in my book) about inductors producing reactive power and capacitors consuming it, but what does this really mean? What is the capacitor doing in the power grid that makes the average power closer to the apparent power?
2. Why is it that the power grid is favoured toward inductive loads (i.e., positive or lagging PF)? My textbook and Wikipedia simply state that it is so without providing examples.
Thanks for any help in answering these questions!
The book started to delve into real-world applications of these concepts in industry and I'd like some clarification.
1. Why do we need reactive power in circuits in general and particularly in the power industry? What use do capacitors/inductors play?
2. When a company wants to increase its PF factor for reduced cost, one way to do so is by installing capacitors in parallel. Mathematically, I see the effect of this is to add a negative reactive power component to the total power, thus making the PF factor closer to unity (since circuits tend to be inductive in nature; see question 3). But what is the intuitive explanation for this? I've read online (but not in my book) about inductors producing reactive power and capacitors consuming it, but what does this really mean? What is the capacitor doing in the power grid that makes the average power closer to the apparent power?
2. Why is it that the power grid is favoured toward inductive loads (i.e., positive or lagging PF)? My textbook and Wikipedia simply state that it is so without providing examples.
Thanks for any help in answering these questions!