For each of consumers, a connection control apparatus is provided that includes an opening/closing device capable of connecting or disconnecting an electric power system and a consumer, that, when a power outage occurs in the electric power system, disconnects the electric power system and the consumer from each other by the opening/closing device at a command from an outage management apparatus or the like, and that connects the electric power system and the consumer to each other by the opening/closing device upon receiving a command from the outage management apparatus or the like at the time of restoration from the power outage. A power supply control apparatus supplies electric power from energy provision equipment to electrical appliances during a power outage in the electric power system.