Solar power generation system and control device

A solar power generation system, comprising:

• a plurality of solar cell panels;
• a plurality of power conversion devices provided to correspond respectively to the plurality of solar cell panels, the plurality of power conversion devices converting direct current power supplied from the plurality of solar cell panels into alternating current power corresponding to a power system, the plurality of power conversion devices supplying, to the power system, the alternating current power after the conversion;
• and
• a control device controlling conversion operations of power of the plurality of power conversion devices,
• the control device including
• a total output value calculation part that
• receives an input of an active power value indicating a magnitude of currently-outputtable active power for each of the plurality of power conversion devices, and
• calculates a total active power value by summing the active power values of the plurality of power conversion devices, the total active power value indicating a magnitude of currently-outputtable active power from all of the plurality of power conversion devices,
• a difference calculation part that
• receives an input of the total active power value,
• receives an input of a total upper limit command value indicating an upper limit of active power output from all of the plurality of power conversion devices,
• calculates a difference between the total upper limit command value and the total active power value, and
• calculates a difference per device of the plurality of power conversion devices by dividing the difference by a number of the plurality of power conversion devices, and
• an upper limit command value calculation part that
• receives an input of the difference per device,
• receives an input of the active power values of the plurality of power conversion devices, and
• calculates individual upper limit command values by adding the difference per device to the active power values of the plurality of power conversion devices, the individual upper limit command values indicating upper limits of the active power individually output respectively from the plurality of power conversion devices,
• the control device controlling an operation of each of the plurality of power conversion devices so that the active power output from each of the plurality of power conversion devices does not exceed the corresponding individual upper limit command value.