The present invention relates to a system for leveling a load of a power system and realizing stabilization of a power system.
In the power system, when all-electric homes further increase by a conventional pace, a power distribution installation (a distribution substation transformer or a pole transformer) needs to be replaced by a large-sized type through an increase in a load. However, there arises a problem that since cost for that purpose is a large burden for an electric power supplier, equipment cost is suppressed.
As one of effective technologies for suppressing a load peak as usual, a demand side management technology is disclosed in JP-A-2007-334523. According to the above technology, in the power system, in the case where there is present a time zone at which a load concentration is anticipated in a future such as the next day, reduction in the amount of the energy use is requested from an electric power supplier to customers. To the customer which moves a time zone for the energy use to the other time zones according to the request, an incentive such as a reception of power rate discount is given in exchange for the above.
The technology is characterized by that a request content of the reduction in the energy use amount to be requested for customers is information in each device and each time zone. Specifically, the request content is that “when the operation time of tomorrow for a dishwasher is changed into 10 to 11 o'clock, the unit price of power is changed to * yen at cut-rate prices”. When the request content is brought into shape as described above, the technology exerts an effect that a customer is easy to respond to a request and as a result a load concentration state of the power system can be peak-shifted with a high expected value.