Abstract: A controller of a central air conditioning system controls a damper provided for a first target space according to a target temperature. After a predetermined period of time has elapsed since control of the damper provided for the first target space was started according to the target temperature, the controller determines: an association between the controlled damper and the temperature sensor that has detected the changed temperature is correct when a changed temperature detected by a temperature sensor approaches the target temperature in the first target space; and the association between the controlled damper and the temperature sensor that has detected the changed temperature is incorrect when a temperature detected by the temperature sensor does not approach the target temperature in the first target space. Then, the controller outputs a result of determination.

Abstract: The power management system includes: a power management device for managing power to be used by multiple power loads; and a large power-using power load. The large power-using power load is defined as a power load which shows a power consumption larger than a difference between allowable power and an upper limit power smaller than the allowable power when operating at a maximum power consumption. The power management device calculates remaining available power available for the large power-using power load, from the total power consumption of the multiple power loads and the upper limit power, and notifies the remaining available power to the large power-using power load. The large power-using power load starts to operate under a condition that its power consumption is equal to or less than the remaining available power notified by the power management device.

Abstract: A controller includes a request acquisition unit that receives an operation permission request from a device, a calculation unit that calculates margin electric power derived from measurement by a measurement unit and an upper limit electric power, and a suppression unit that instructs the device to lower electric power consumption. When the margin electric power is less than the required electric power, the controller suppresses electric power consumption in devices in lower priority order stored in a priority storage unit within the suppression unit, such that electric power consumption increase in the management area may remain within the margin electric power. Then the controller issues the requesting device permission-or-denial for the operation, from the calculation unit.

Abstract: Disclosed is an electric power supply system which has: a common power source which stores and supplies a power via a local power grid; and a distributed power source which supplies a power to buildings and a surplus to the common power source. The electric power supply system further includes a first power meter measuring the amount of power supplied from a commercial power source, a second power meter measuring the amount of power received from and supplied to the common power source via the local power grid, and a distribution control device which distributes a power from the common power source to the area based on the amounts of power as measured by the first power meter and the second power meter.

Abstract: A demand measurement unit measures load demand power and a power generation measurement unit measures solar cell output power. A threshold storage unit stores a discharge control threshold for determining whether to discharge remaining storage cell power. When demand power exceeds generated power, a command unit controls storage cell discharge by comparing remaining storage cell power with the discharge control threshold and transmits a control command to a power conditioner. If the remaining storage cell power exceeds the discharge control threshold, then the command unit commands storage cell discharge. A threshold setting unit sets the discharge control threshold, and updates the discharge control threshold when that value changes.

Abstract: Disclosed is an electric power supply system which has: a common power source which stores and supplies a power via a local power grid; and a distributed power source which supplies a power to buildings and a surplus to the common power source. The electric power supply system further includes a first power meter measuring the amount of power supplied from a commercial power source, a second power meter measuring the amount of power received from and supplied to the common power source via the local power grid, and a distribution control device which distributes a power from the common power source to the area based on the amounts of power as measured by the first power meter and the second power meter.

Abstract: A controller installed at each consumer side comprises: a power generation amount acquisition unit acquiring the amount of electricity that has been generated in a solar cell; a power selling amount acquisition unit acquiring the amount of electricity for sale that has been allowed to flow into an electric power system by reverse power flow, among the electricity generated in the solar cell; and a power selling suppression control unit configured to set a threshold value for the amount of the electricity for sale, as proportional to the amount of the generated electricity acquired by the power generation amount acquisition unit, and configured to suppress the reverse power flow into the electric power system so that the amount of the electricity for sale is set to the threshold value or less.

Abstract: Disclosed is an electric power supply system which has: a common power source which stores and supplies a power via a local power grid; and a distributed power source which supplies a power to buildings and a surplus to the common power source. The electric power supply system further includes a first power meter measuring the amount of power supplied from a commercial power source, a second power meter measuring the amount of power received from and supplied to the common power source via the local power grid, and a distribution control device which distributes a power from the common power source to the area based on the amounts of power as measured by the first power meter and the second power meter.

Abstract: An object is to allow intuitively understand whether display information displayed on a display device indicates favorable state or unfavorable state for a user. An acquisition unit 11 acquires energy-related information. A communication unit 13 is connected to a display device 3 and an operation device 4. Display information to be displayed on the display device 3 has a stratum structure including first display information as a top tier and second display information, the first display information including at least two categories which express the favorability about the energy-related information, the second display information including plural kinds of information so that the lower tier includes more detailed information. An information generation unit 14 transmits second display information to the display device 3 upon receiving a request from the operation device 4 when first display information is displayed on the display device 3.

Abstract: The power management system includes: a power management device for managing power to be used by multiple power loads; and a large power-using power load. The large power-using power load is defined as a power load which shows a power consumption larger than a difference between allowable power and an upper limit power smaller than the allowable power when operating at a maximum power consumption. The power management device calculates remaining available power available for the large power-using power load, from the total power consumption of the multiple power loads and the upper limit power, and notifies the remaining available power to the large power-using power load. The large power-using power load starts to operate under a condition that its power consumption is equal to or less than the remaining available power notified by the power management device.

Abstract: A controller includes a request acquisition unit that receives an operation permission request from a device, a calculation unit that calculates margin electric power derived from measurement by a measurement unit and an upper limit electric power, and a suppression unit that instructs the device to lower electric power consumption. When the margin electric power is less than the required electric power, the controller suppresses electric power consumption in devices in lower priority order stored in a priority storage unit within the suppression unit, such that electric power consumption increase in the management area may remain within the margin electric power. Then the controller issues the requesting device permission-or-denial for the operation, from the calculation unit.

Abstract: A demand measurement unit measures load demand power and a power generation measurement unit measures solar cell output power. A threshold storage unit stores a discharge control threshold for determining whether to discharge remaining storage cell power. When demand power exceeds generated power, a command unit controls storage cell discharge by comparing remaining storage cell power with the discharge control threshold and transmits a control command to a power conditioner. If the remaining storage cell power exceeds the discharge control threshold, then the command unit commands storage cell discharge. A threshold setting unit sets the discharge control threshold, and updates the discharge control threshold when that value changes.

Abstract: An object is to allow intuitively understand whether display information displayed on a display device indicates favorable state or unfavorable state for a user. An acquisition unit 11 acquires energy-related information. A communication unit 13 is connected to a display device 3 and an operation device 4. Display information to be displayed on the display device 3 has a stratum structure including first display information as a top tier and second display information, the first display information including at least two categories which express the favorability about the energy-related information, the second display information including plural kinds of information so that the lower tier includes more detailed information. An information generation unit 14 transmits second display information to the display device 3 upon receiving a request from the operation device 4 when first display information is displayed on the display device 3.

Abstract: A controller installed at each consumer side comprises: a power generation amount acquisition unit acquiring the amount of electricity that has been generated in a solar cell; a power selling amount acquisition unit acquiring the amount of electricity for sale that has been allowed to flow into an electric power system by reverse power flow, among the electricity generated in the solar cell; and a power selling suppression control unit configured to set a threshold value for the amount of the electricity for sale, as proportional to the amount of the generated electricity acquired by the power generation amount acquisition unit, and configured to suppress the reverse power flow into the electric power system so that the amount of the electricity for sale is set to the threshold value or less.

Abstract: The appliance control system includes a control device, a human detection sensor, and a manual operation switch. The control device includes a selecting unit configured to select a mode of an appliance driving unit controlling an appliance, from an operation mode in which the appliance driving unit operates the appliance, a limited mode in which the appliance driving unit limits an operation of the appliance, and a rest mode in which the appliance driving unit terminates the operation of the appliance. The selecting unit changes the appliance driving unit to the operation mode when the manipulation switch is turned on. The selecting unit changes the appliance driving unit to the rest mode when the manipulation switch is turned off. The selecting unit changes the appliance driving unit to the waiting mode when the human detection sensor does not detect a human within waiting time while the appliance driving unit is in the operation mode.

Abstract: Disclosed is an electric power supply system which has: a common power source which stores and supplies a power via a local power grid; and a distributed power source which supplies a power to buildings and a surplus to the common power source. The electric power supply system further includes a first power meter measuring the amount of power supplied from a commercial power source, a second power meter measuring the amount of power received from and supplied to the common power source via the local power grid, and a distribution control device which distributes a power from the common power source to the area based on the amounts of power as measured by the first power meter and the second power meter.

Abstract: A DC power distribution system for supplying a DC power into a building, includes one or more power feeding devices which supply a DC power, a power feeding line for supplying the DC power supplied from the power feeding devices to various sites in the building and sockets located at the various sites and connected to the power feeding line. The DC power distribution system further includes a portable power feeding device which supplies a generated or stored DC power thereof to the power feeding line via a plug which is removably connected to one of the sockets.