dwl: I assume you are served via Wellington Electricity. If so, talk to them (915 6100), saying you are concerned about the frequency of the cuts and ask whether there is a known reason or whether they are all different isolated events (assuming they don't direct you to your retailer). It doesn't need to be a complaint and they don't want the power to fail either. There might be reasons like trees where they have powers to trim but neighbours might be making that process difficult where some local discussion might also help.
I'll give them a call, thanks.