Hydrogen storage is a bit of a holy grail for the Hydrogen industry. Currently this is basically limited to high pressure gas storage.
Current technology doesn't allow it to be liquified unlike LNG or LPG and therefore any storage system worth having either needs vast salt storage caverns at about 80-120 bar or very expensive pressure vessels or lined rock caverns at up to 200 bar,
We need a lot lot more info here.
Volume / mass of hydrogen to be stored, maximum pressure you are considering, Pressure required by your "power plant". Most critically is number of hours / days you need this storage to provide hydrogen for you. Note the units I'm using....
You may well not like the answer you get.
Don't forget about the amount of power you need to actually compress the hydrogen into the storage in the first place.... Not to be sniffed at as Hydrogen doesn't like being compressed.
Remember - More details = better answers
Also: If you get a response it's polite to respond to it.