Charge and Discharge of Power

You can't "store" volts, and you can't store AC current.

I suggest Googling power storage.

"Volts" is a measure of potential energy, and you can certainly store potential energy. You did that when you picked up your rock and put it in the bed of your truck. You can release that potential energy when you put the rock back where it came from. And, the OP said nothing about AC.

Just to be pedantic

But, what's my rock without gravity?

What's a volt without an AMP to push it against the resistance of the wire?

Lyn... Thanks for the enlightenment...All this time in the industry and I thought it was the volt that pushed the amp.

Fredski...You might Google SMES for an explanation of chokes that not only store energy, but can do it for prolonged time periods and can, with the aid of power conditioning, store AC power and return it to the grid with as little as 5% losses. Whilst not yet practical for general use, it is indeed a choke that stores energy.

The Koch Dynamic Energy Storage system is another - albeit shorter time period - choke based AC power storage device that is in current usage in many installations such as wind generators etc.

OK, have it your way. I can't re-write the laws of physics. I can skew terms.

I'm sorry for the elementary mistake.

It ain't the first time.

May Imake the remark that it is the opposite: the volt pushes the ampere through the resistor. Without volts no ampere flows, at least in my physics.

Yes, you can. It depends on on your requirement.

Search 1) Capacitor Bank 2) Flywheel 3) Battery Bank

a choke stores power? since when??

Don't feed the trolls.

Ever since magnetic fields were "discovered", otherwise all those ignition coils would never zap a spark plug. Since inductors are usually small they don't store a lot of energy relative to the same size capacitor.

And here, all this time I thought chokes just slowed it down.

Actually this is not a bad reply. Now for your homework assignment, design and calculate the efficiency for each method that will meet the OP's requirements as he stated them.

O man, it's a different story. First, we need to get complete details from him. He just provided a hint, sort of and the PF $ I guess.

Just pointing out directions, it all depends which way he would like to go from here.

By wind blowing over clouds charge will accumulate or in a LV/HV cable some charge could be stored by a megger.

Meggers don't work that way.

Well theoretically a flywheel storage system would work....if you could find, or maybe build one....

http://www.greentechmedia.com/articles/read/quantum-energy-storage-redesigns-the-flywheel-for-microgrids

Pumped storage.

Similar to pumped storage in a smaller scale gravity light works.

Plenty of possible answers but what's the project and application so we can narrow them down to a viable few?

Battery-backed UPS.

I am assuming you mean 220 VAC...

Sure, with a 220 volt ac battery charger, some batteries, and an inverter driven by the batteries with a 220 vac output.

...but they wouldn't charge that quickly, nor do I believe they could discharge that quickly.....

Yes, of course it is. All you've got to do is work out how you want to store it. Did you Google Dinorwic Pumped Storage Scheme, by any chance? How about "UPS"? I'm not going to do if for you, because that might make you lazy, and we don't want that, do we?

As basic principle you cannot store power you can store "energy". Power is the energy supplied in a time unit. You can of course use the stored energy to supply power.

Energy is not DC or AC it has no sign only value.

This only to make use of words clear since words have a meaning and are too often wrongly used.