Abstract: The disclosed dispersed power supply system includes a power conditioner configured to control output of a power supply apparatus, a current sensor, another power conditioner configured to control output of another power supply apparatus and another current sensor, and when a forward power flow threshold for preventing a reverse power flow of the power conditioner is lower than that of another power conditioner, the power conditioner controls the output of the power supply apparatus to adjust the forward power flow that is higher than the forward power flow threshold to the forward power flow threshold, and then, if the forward power flow is higher than the forward power flow threshold when another power conditioner controls the output of another power supply apparatus based on another forward power flow threshold, increases the forward power flow threshold.

Abstract: A fault diagnosis method of diagnosing a fault related to a PV PCS 150, configured to perform an interconnected operation in which a PV 100 is interconnected to a grid 10: supplies power from independent operation output of the PV PCS 150 to a storage PCS 250 by an independent operation that does not interconnect the PV 100 to the grid 10 after the grid interconnection apparatus stops the interconnected operation by detecting abnormality; measures an output power state of the PV 100 and/or the PV PCS 150 when power is supplied to the storage PCS 250; and determines that the fault occurs and performs an error process for notification to a user when the measured output power state does not satisfy a predetermined condition.

Abstract: A power conditioner system includes a power-generation power conditioner 30 for connecting a power generation equipment 11 to a grid 12 and a power-storage power conditioner 50 for connecting a power storage equipment 13 to the grid 12, wherein the power conditioner 30 includes an independent-power-generation output unit 34 for outputting, separately from power supply to the grid 12, power based on power of the power generation equipment 11, and the power conditioner 50 includes an independent-power-storage output unit 54 for outputting, separately from power supply to the grid 12, power based on power in the power storage equipment 13. The power conditioner 50 supplies at least one of AC power based on the output of the independent-power-generation output unit 34, AC power based on the output of the independent-power-storage output unit 54, and system power of the grid 12, to an independent output system 62 having a predetermined load.

Abstract: A startup control method of controlling startup of a PV PCS 150 configured to perform interconnected operation in which a PV 100 is interconnected to a grid 10 to supply power to a load 400: supplies power from independent operation output of the PV PCS 150 to a storage PCS 250 by an independent operation that does not interconnect the PV 100 to the grid 10 before starting the interconnected operation; measures the output power amount of the PV 100 or the PV PCS 150 when the power is supplied to the storage PCS 250; and stops the independent operation to start the interconnected operation when the measured output power amount is larger than a predetermined amount.

Abstract: An HEMS 700 provided in a consumer having independently operable power supply means (PV 100, storage battery 200, PCS 400 and the like) and at least one load 300, for controlling the power supply means and the load 300, determines an during-independent-operation schedule that is an operation schedule of the load during the independent operation on the basis of a period when the independent operation is performed, a power supply status of the power supply means, and a status of the load 300.

Abstract: A power management system comprises a power generation equipment that generates power and a storage battery that stores power, and is connected to a power grid. The power management system comprises: a control unit that controls an operation mode of the storage battery so as to start charging the storage battery when a voltage value of the power grid exceeds a predetermined system voltage threshold value.

Abstract: The disclosed dispersed power supply system includes a power conditioner configured to control output of a power supply apparatus, a current sensor, another power conditioner configured to control output of another power supply apparatus and another current sensor, and when a forward power flow threshold for preventing a reverse power flow of the power conditioner is lower than that of another power conditioner, the power conditioner controls the output of the power supply apparatus to adjust the forward power flow that is higher than the forward power flow threshold to the forward power flow threshold, and then, if the forward power flow is higher than the forward power flow threshold when another power conditioner controls the output of another power supply apparatus based on another forward power flow threshold, increases the forward power flow threshold.

Abstract: A power conditioner system includes a power-generation power conditioner 30 for connecting a power generation equipment 11 to a grid 12 and a power-storage power conditioner 50 for connecting a power storage equipment 13 to the grid 12, wherein the power conditioner 30 includes an independent-power-generation output unit 34 for outputting, separately from power supply to the grid 12, power based on power of the power generation equipment 11, and the power conditioner 50 includes an independent-power-storage output unit 54 for outputting, separately from power supply to the grid 12, power based on power in the power storage equipment 13. The power conditioner 50 supplies at least one of AC power based on the output of the independent-power-generation output unit 34, AC power based on the output of the independent-power-storage output unit 54, and system power of the grid 12, to an independent output system 62 having a predetermined load.

Abstract: A power management system comprises a power generation equipment that generates power and a storage battery that stores power, and is connected to a power grid. The power management system comprises: a control unit that controls an operation mode of the storage battery so as to start charging the storage battery when a voltage value of the power grid exceeds a predetermined system voltage threshold value.

Abstract: A fault diagnosis method of diagnosing a fault related to a PV PCS 150, configured to perform an interconnected operation in which a PV 100 is interconnected to a grid 10: supplies power from independent operation output of the PV PCS 150 to a storage PCS 250 by an independent operation that does not interconnect the PV 100 to the grid 10 after the grid interconnection apparatus stops the interconnected operation by detecting abnormality; measures an output power state of the PV 100 and/or the PV PCS 150 when power is supplied to the storage PCS 250; and determines that the fault occurs and performs an error process for notification to a user when the measured output power state does not satisfy a predetermined condition.

Abstract: A startup control method of controlling startup of a PV PCS 150 configured to perform interconnected operation in which a PV 100 is interconnected to a grid 10 to supply power to a load 400: supplies power from independent operation output of the PV PCS 150 to a storage PCS 250 by an independent operation that does not interconnect the PV 100 to the grid 10 before starting the interconnected operation; measures the output power amount of the PV 100 or the PV PCS 150 when the power is supplied to the storage PCS 250; and stops the independent operation to start the interconnected operation when the measured output power amount is larger than a predetermined amount.

Abstract: An HEMS 700 provided in a consumer having independently operable power supply means (PV 100, storage battery 200, PCS 400 and the like) and at least one load 300, for controlling the power supply means and the load 300, determines an during-independent-operation schedule that is an operation schedule of the load during the independent operation on the basis of a period when the independent operation is performed, a power supply status of the power supply means, and a status of the load 300.