SPP has issued a resource advisory for its 14-state balancing authority area in the Eastern Interconnection next week, effective Monday at 10 a.m. CT through 8 p.m. Tuesday, because of an expected shortfall from wind resources and generating units offline on maintenance outages.

The RTO said it is expecting 13 to 14 GW of planned outages and another 8 to 9 GW of forced or unplanned outages early next week. A spokesperson said that as of Thursday, 14 GW of capacity are currently on planned outages and 9 GW are on unplanned or forced outages.

The difference is a forecast that projects wind energy to be significantly lower during the advisory period. As a result, SPP’s BAA might use greater unit commitment notification time frames, including making commitments prior to the day-ahead market and/or committing resources in reliability status.

SPP issues resource advisories when extreme weather, significant outages, wind forecast uncertainty or load-forecast uncertainty are expected in its reliability coordination service territory. Resource advisories do not require public conservation.