Abstract: A first power storage device, a second power storage device, and a third power storage device start discharging, with all of the three power storage devices in a state of full charge (TH1). The discharging continues until the second power storage device and the third power storage device can secure a residual capacity Pa, which is equal to or greater than a minimum residual capacity P. Then, the second power storage device and the third power storage device are disconnected, and the first power storage device is discharged to a capacity TH2. After the end of the operation described above, the total capacity of the first power storage device is measured by calculating TH1?TH2.

Abstract: A power management system includes a first receiver for receiving information specifying reverse power flow from a base power meter measuring at least the reverse power flow output from a facility to a power grid, a second receiver for receiving information specifying each of individual output powers of two or more adjustment power supplies provided in the facility, and a controller for specifying each of individual reverse power flows of the two or more adjustment power supplies managed as the reverse power flow. The controller specifies individual reverse power flows of the two or more adjustment power supplies, by executing a correction process of correcting a discrepancy between a sum of the individual output powers of the two or more adjustment power supplies and the reverse power flow based on the individual output powers of the two or more adjustment power supplies.

Abstract: A power control system comprises: a dummy output unit configured to supply a dummy current to a current sensor during independent operation, and not supply the dummy current to the current sensor during interconnected operation, the dummy current corresponding to forward power flow; and a controller configured to determine whether a supply state of the dummy current is normal, and control whether to continue operation of the dummy output unit.

Abstract: A PCS performs a control of increasing an output of a solar cell to exceed the suppression power threshold, when there is a period, where the output of the solar cell falls below a suppression power threshold, in an accumulation period included in a suppression period in which the output of the solar cell is suppressed.

Abstract: When operating electricity storage apparatuses in parallel, the degree of degradation of the electricity storage apparatuses is made uniform without using another apparatus or the like. An electricity storage system includes a plurality of electricity storage apparatuses configured to connect to a power grid and supply power to a load and a detector configured to detect a forward power flow from the power grid. The plurality of electricity storage apparatuses includes a plurality of storage cells configured to be charged using electric power supplied by the power grid and a plurality of power controllers configured to control charging and discharging of respective storage cells in the plurality of storage cells. Each of the plurality of power controllers sets a condition for starting discharge of each of the plurality of storage cells on the basis of the state of each of the plurality of storage cells.

Abstract: This system can manage efficient operation control among distributed power sources without impairing their versatility. This power control system includes distributed power sources including a storage cell (12) and a power generation device (33) that generates power while a current sensor (40) detects forward power flow, and a power control device (20) including a first power converter (21) that converts AC power from a commercial power grid to DC power and supplies the DC power to the storage cell (12) during an interconnected operation, a supply unit that supplies power generated by the power generation device (33) to the storage cell (12) during an independent operation, and an independent operation switch (24) opened during the interconnected operation and closed during the independent operation to cause output from the first power converter (21) to flow in a forward power flow direction through the current sensor (40).

Abstract: In a power control system including a first controller configured to control supply of power from a photovoltaic module to a plurality of loads and a second controller configured to control charge/discharge of a storage battery, which is one of the plurality of loads, the first controller controls output following power consumption by the plurality of loads, and the second controller increases, during a self-sustaining operation, charging power of the storage battery and detects output fluctuation from the photovoltaic module or from the first controller along with the increase in the charging power, then based on the detected output fluctuation, controls charge of the storage battery, thus, even if connection to the grid is disconnected, supply power may be replenished by the load power used for supply to the predetermined loads, thereby allowing a stable power supply to the other loads.

Abstract: A power control system comprises: a dummy output unit configured to supply a dummy current to a current sensor during independent operation, and not supply the dummy current to the current sensor during interconnected operation, the dummy current corresponding to forward power flow; and a controller configured to determine whether a supply state of the dummy current is normal, and control whether to continue operation of the dummy output unit.

Abstract: When operating electricity storage apparatuses in parallel, the degree of degradation of the electricity storage apparatuses is made uniform without using another apparatus or the like. An electricity storage system includes a plurality of electricity storage apparatuses configured to connect to a power grid and supply power to a load and a detector configured to detect a forward power flow from the power grid. The plurality of electricity storage apparatuses includes a plurality of storage cells configured to be charged using electric power supplied by the power grid and a plurality of power controllers configured to control charging and discharging of respective storage cells in the plurality of storage cells. Each of the plurality of power controllers sets a condition for starting discharge of each of the plurality of storage cells on the basis of the state of each of the plurality of storage cells.

Abstract: A PCS (200) converts the output power from a plurality of distributed power supplies or the supply power to the distributed power supplies. The PCS (200) is provided with a plurality of converters for converting said output power or said supply power. In a first state, the converters convert the respective outputs of the distributed power supplies. In a second state, the converters perform a conversion on the output or input of at least one distributed power supply by using multiple converters.

Abstract: Diffraction of a noise may be reduced in an inexpensive manner without reducing power generation efficiency. A power generation control apparatus (10) includes a plurality of combinations of DC input terminals (101) and (102) for inputting DC power and a noise filter (11) connected to the DC input terminals (101) and (102), wherein each of the plurality of combinations has a different extreme value of frequency characteristics of the noise filter (11).

Abstract: This system can manage efficient operation control among distributed power sources without impairing their versatility. This power control system includes a power generation device (33) that generates power while a current sensor (40) detects forward power flow and another distributed power source (12), and a power control device (20) including an output unit (50) capable of outputting power from the other distributed power source (12) while the power generation device (33) and the other distributed power source (12) are disconnected from the grid. Output from the output unit (50) allows supply of dummy current to the current sensor (40), the dummy current flowing in the same direction as the forward power flow.

Abstract: A PCS performs a control of increasing an output of a solar cell to exceed the suppression power threshold, when there is a period, where the output of the solar cell falls below a suppression power threshold, in an accumulation period included in a suppression period in which the output of the solar cell is suppressed.

Abstract: An abnormality occurring in a ZCT is detected simply and reliably. A zero-phase-sequence current transformer (ZCT) (11) detects zero-phase-sequence current in power wires inserted therethrough, and in addition to the power wires, has inserted therethrough a wire through which a constant DC offset current flows.

Abstract: Provided is an electronic device including a contact detection unit 16 configured to detect a contact made by a contacting object, a pressure detection unit 13 configured to detect pressure applied to the contact detection unit 16, and a control unit 11 configured to perform control so that predetermined processing is carried out when data based on the pressure detected by the pressure detection unit 13 satisfies a predetermined standard. When the contact detection unit 16 detects another contact within a predetermined time period after the predetermined processing has been carried out, the control unit 11 performs control so that the predetermined processing is carried out when the data based on the pressure satisfies a lower standard than the predetermined standard.

Abstract: This system can manage efficient operation control among distributed power sources without impairing their versatility. This power control system includes a power generation device (33) that generates power while a current sensor (40) detects forward power flow and another distributed power source (12), and a power control device (20) including an output unit (50) capable of outputting power from the other distributed power source (12) while the power generation device (33) and the other distributed power source (12) are disconnected from the grid. Output from the output unit (50) allows supply of dummy current to the current sensor (40), the dummy current flowing in the same direction as the forward power flow.

Abstract: This system can manage efficient operation control among distributed power sources without impairing their versatility. This power control system includes distributed power sources including a storage cell (12) and a power generation device (33) that generates power while a current sensor (40) detects forward power flow, and a power control device (20) including a first power converter (21) that converts AC power from a commercial power grid to DC power and supplies the DC power to the storage cell (12) during an interconnected operation, a supply unit that supplies power generated by the power generation device (33) to the storage cell (12) during an independent operation, and an independent operation switch (24) opened during the interconnected operation and closed during the independent operation to cause output from the first power converter (21) to flow in a forward power flow direction through the current sensor (40).

Abstract: A communication device (1) includes a communication unit (60) that communicates with another communication device, a display unit (30) that displays an object corresponding to an object displayed on a display unit of the other communication device, and a control unit (10) that controls the communication unit (60) to transmit threshold information associated with the object displayed on the display unit (30) to the other communication device.

Abstract: A transmission side terminal 10 is provided with a transmission and reception unit 20 for transmitting and receiving an e-mail and an e-mail composing unit 32 for composing an e-mail including a special character for inquiry having associated therewith an information reply request, which is to obtain information on a destination mobile terminal of the e-mail to be transmitted. A reception side terminal 10 is provided with the transmission and reception unit 20, a determination unit 34 for determining whether a received e-mail includes a special character for inquiry, and a reply e-mail composing unit 32, when it is determined that the received e-mail includes the special character for inquiry, for composing a reply e-mail including a special character for reply with which reply information in accordance with the information reply request is associated.

Abstract: Diffraction of a noise may be reduced in an inexpensive manner without reducing power generation efficiency. A power generation control apparatus (10) includes a plurality of combinations of DC input terminals (101) and (102) for inputting DC power and a noise filter (11) connected to the DC input terminals (101) and (102), wherein each of the plurality of combinations has a different extreme value of frequency characteristics of the noise filter (11).