Recently got hired at a local electric utility and unfortunately my college did not offer a lot of power classes so I am struggling with some things that really come down to how capacitors and inductors interact. I think I have some ideas but am really looking for some reassurance that I am right or why I am wrong.(adsbygoogle = window.adsbygoogle || []).push({});

1) If inductors make the current lag and you add caps to make the voltage lag this is just bringing the p.f. closer to unity. But whether it is at unity or not the inductors still need vars to build up the magnetic field. Are the added caps now supplying the energy needed for the inductors magnetic field? (when I say supply I mean the capacitor is now releasing the stored energy in it's E field which the inductor now uses to build its magnetic field)

2) If the caps are now supplying the energy to build up the magnetic field how is this happening? In the first quarter of the sine wave, when the energy is being stored in the inductor, woundn't the capacitor be charging and not be able to supply the energy needed? If someone could help me understand what happens in a cap and inductor in the first half of the sine wave I would appreciate it.

3) If there is a capicitor 1 span (say 50 ft of wire) away from an inductive load, and I am correct in thinking the caps supply the vars to the inductor, then would the current in this 1 span of wire be higher than the span before it since there is additional current flowing between the cap and inductor?

4) How does a cap bank raise the voltage? My thinking was since there is less current being supplied by the generator then there are less line losses and that raises the voltage.

If anyone can help me understand any of these questions a little better I would greatly appreciate it. Thanks.

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# Trying to understand capacitors and inductors

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