| 主权项 |
1. A power supply system comprising a plurality of local systems that each include an AC line to which a plurality of power consumers are connected, a power storage device, and a local inverter device that connects the power storage device and the AC line, comprising
a linking inverter device that connects the power storage device of one local system and the AC line of another local system between the local systems such that the plurality of local systems are electrically connected in series, the power supply system further comprising: an interrupting device capable of switching the AC line of one local system among the plurality of local systems and an external power system to one of a connected state and a parallel-off state; and a control device capable of controlling operation of the local inverter devices, the linking inverter device, and the interrupting device, wherein when the AC line of the local system that can be connected to the power system via the interrupting device and the power system are in the parallel-off state, the control device causes the local inverter device of each of the plurality of local systems to operate in a parallel-off operation mode in which control is performed such that a voltage of power on the AC line is at a target voltage and such that a frequency of power on the AC line is at a target frequency determined according to a state of charge of the power storage device, and if the control device determines that a condition for switching to the connected state has been satisfied, with respect to the local system that can be connected to the power system via the interrupting device, the control device stops operation of the local inverter device in the parallel-off operation mode and causes a switch to the connected state by operating the interrupting device, and thereafter causes the local inverter device to operate in a charging operation mode used in charging the power storage device with supplementary power received from the power system. |
