Wow, so what country is that?
Here in CT, CL&P and NU do a pretty good job lately. I have no idea how much juice comes from Millstone or Indian Point; when I was in the southwestern portion of the state, some of it probably came from
Candlewood Lake, though barring rainfall, that only acts as a storage battery. There's always a crunch during heat waves, but it's never been a big deal to turn the thermostat warmer and shut off a few more lights than normal - I've never seen a brownout in the towns I've been in. The big storm last winter brought the longest outage I've sat through since the last one in.. 1987? or 88?, and where I was, it only lasted a day. (HV lines normally come in three redundant sets; if I remember, two snapped from the ice, in rapid enough succession that the automatic switchover burned out something not easily replaced at the generating end of the third.)
Otherwise... the biggest threat is our drivers; storms give you about a 1:10 chance of having your block knocked out by someone smashing a pole. Following that would be lightning; we had a strike near us, once, and I lost a machine hooked to a supressor (apparently by entry through the phone line) -- since then, I haven't really bothered with supressors, since most of the designs can't handle that level of surge anyway, you rarely know if they're offering a proper level of protection (most 'power strips' seem to offer breakers without even MOVs), and a blown machine is an excuse to upgrade.
If I ever did anything serious, I'd hope to be in an environment with a proper, industrial grade supressor installed at the panel (most office buildings seem to have installed them, now), backups taken regularly on removable media, and/or a proper UPS (which basically have to have a good grade of protection simply to prevent blowing up the batteries) or *real* supressor, not whatever Belkin can charge a $30 markup on while staying "competetive."
These guys used to (and probably still do) advertise in Nuts and Volts, since around the dawn of the home computing era. Not cheap, and I assume the install-at-panel devices are probably as good and more cost effective, but you can't beat their attitude. If I had something like a Lorraine prototype to protect, that sort of thing might be worth it.
