> 62.7 gigawatts of power available when supplies are expected to be tightest Friday evening, about 6.3 gigawatts more than projected demand. Isn't it normal

> 62.7 gigawatts of power available when supplies are expected to be tightest Friday evening, about 6.3 gigawatts more than projected demand. Isn't it normal for power plants to generate slightly more than demand so they don't waste power? 6.3gw seems like a lot of overhead.