Really? They typically don't happen in winter. I was there in June when the rolling blackouts were happening and they also shut off power to universities, condo buildings, and entire neighborhoods (many restaurants announced they were closed because they had no power to work). Thankfully I lived near a bunch of politicians so they didn't dare to cut off my condo building's power.
I kind of find it ridiculous how they don't seem to be upgrading the grid or putting up more power plants to prevent it from happening again. The government loves to promote anything good they are doing, so the silence on them and EVN speaks volumes (actually the government was investigating EVN over the rolling blackouts, although that announcement could have been to shift the blame over to EVN, which is partially fair because EVN is allegedly corrupt)