Excuse me, is it normal for the power supply department to have random and irregular power outages?

It is estimated that the situation you mentioned belongs to the power outage after the power outage. Although there is no regularity in power failure and power transmission, it depends on whether the date and day are regular. The maintenance of the power sector will generally be notified to power customers through newspapers, TV stations, radio, telephone and other channels (usually there is a maintenance day, a certain day or a certain week in January). If it is maintenance, of course it is normal.

If the power load increases sharply and power needs to be cut off, you will definitely not stop the electricity in your home, but stop some "big electricity", that is, users (factories) with large electricity consumption will definitely not stop the electricity in the water plant.

If there is frequent power outage, it may be that there is a big construction work on the power line and power outage is needed.

The power sector also doesn't want a power outage, because after the power outage, power customers won't be able to use electricity, the electricity bill will be less, and the profit will be reduced.