Power generation system, and administration apparatus and administration method of power generation system

An administration apparatus of a power generation system which includes a plurality of sets of direct current power sources and power converters which are connected to the direct current power sources to convert a direct current power into an alternating current power, the power converters being connected in parallel to supply the alternating current power to a system power supply,

• wherein, from among the power converters, a first power converter when started first is set as a master machine which detects an islanding operation state in which power supply from the system power supply is stopped, and setting is executed so as to cause the remaining power converters not to detect the islanding operation state,
• wherein, from among the power converters excluding the first power converter, a second power converter when started second is set as a reserve master machine, and setting is executed so as to cause the remaining power converters not to be set to the reserve master machine,
• wherein when the master machine is not present among the power converters in operation or an operating mode of the master machine changes to a constant voltage operation mode, the reserve master machine is selected as the master machine, and
• wherein when an operating mode of the reserve master machine changes to the constant voltage operation mode, the reserve master machine is changed to another power converter.

An administration method of a power generation system which includes a plurality of sets of direct current power sources and power converters which are connected to the direct current power sources to convert a direct current power into an alternating current power, the power converters being connected in parallel to supply the alternating current power to a system power supply, the method comprising:

• a first setting step of setting, from among the power converters, a first power converter when started first as a master machine which detects an islanding operation state in which power supply from the system power supply is stopped, and executing setting so as to cause the remaining power converters not to detect the islanding operation state;
• a second setting step of setting, from among the power converters excluding the first power converter, a second power converter when started second as a reserve master machine, and executing setting so as to cause the remaining power converters not to be set to the reserve master machine;
• and
• a selection step of, when the master machine is not present among the power converters in operation or an operation mode of the master machine changes to a constant voltage operation mode, selecting the reserve master machine as the master machine,
• wherein when an operating mode of the reserve master machine changes to the constant voltage operation mode, the reserve master machine is changed to another power converter.

A computer-readable storage medium which stores a computer program for implementing an administration method of a power generation system which includes a plurality of sets of direct current power sources and power converters which are connected to the direct current power sources to convert a direct current power into an alternating current power, the power converters being connected in parallel to supply the alternating current power to a system power supply, the method comprising:

• a first setting step of setting, from among the power converters, a first power converter when stated first as a master machine which detects an islanding operation state in which power supply from the system power supply is stopped, and executing setting so as to cause the remaining power converters not to detect the islanding operation state;
• a second setting step of setting, from among the power converters excluding the first power converter, a second power converter when started second as a reserve master machine, and executing setting so as to cause the remaining power converters not to be set to the reserve master machine;
• and
• a selection step of, when the master machine is not present among the power converters in operation or an operating mode of the master machine changes to a constant voltage operation mode, selecting the reserve master machine as the master machine,
• wherein when an operating mode of the reserve master machine changes to the constant voltage operation mode, the reserve master machine is changed to another power converter.