I have often suffered from power interruptions here in darkest Cumbria. I found that my machine restarted OK on all occasions, albeit sometimes following a black screen and selecting restart normally.
I had three cuts (just a second each) in rapid fire. It took me more than an hour to get my machine working again and my RAID 1 configuration repaired.
I now have a UPS and I am no longer affected by power cuts to my machine.