Re: Is there a high-voltage powerstorage system, and how it is handled?

> I have found higher energy density capacitors, but
> their operation voltage might pass the 10,000 Volts,
> and I'm unfamiliar with adequate switching devices.

I think you have encountered the edge of knowledge. Semiconductors can't handle the high power unless you use large expensive parallel/series arrays of them. Robust high voltage switching devices have not changed much since they were developed a century ago: the best ones are the spark gaps. You'll find information on these by searching for "trigatron" and "krytron."

Mike's Electric Stuff Page: Pulsed power
http://www.netcomuk.co.uk/~wwl/pulse.html

I wonder if anyone has tried your idea before. If a high voltage energy-storage capacitor could be repeatedly partially discharged into the secondary of a HV power transformer, low voltage AC would appear at the primary winding. You could even do this at high frequency, and then use a smaller and efficient ferrite-core transformer. However, there is a problem: spark gap switching only turn on, and the current isn't easily interrupted. It might work with a rotary spark gap such as was used in early radio transmitters (and in large Tesla Coils.)

Note that high voltage, high energy capacitors are frighteningly dangerous. Suddenly dumping their entire stored energy can create explosions, particularly in materials like human tissues which contain water.

I'm not familiar with exotic batteries enough to tell you about other possibilities. I recently heard something about Ovshinski's "ovonics" and energy storage:

ECD
http://www.ovonic.com/enstor.html