VOLTAGE SETTING DEVICE, PHOTOVOLTAIC POWER GENERATION SYSTEM, AND CONTROL METHOD OF VOLTAGE SETTING DEVICE

An output converter (T11) includes a DCDC conversion section (53), a secondary side voltage/current monitoring section (56) detecting a power from the DCDC conversion section (53), a maximum operation point control section (54) determining what voltage is to be set by the DCDC conversion section (53) so that the power detected by the secondary side voltage/current monitoring section (56) is maximum, a DCDC short-circuit switch (51) via which a current from a module (MOD 11) bypasses the DCDC conversion section (53) to outside, a primary side voltage/current monitoring section (55) measuring the current from the module (MOD 11), a module short-circuit switch switching between a state where a secondary side cathode (S2+) and a secondary side anode (S2-) are short-circuited and a state where they are not short-circuited, the maximum operation point control section (54) causing the DCDC short-circuit switch (51) and the module short-circuit switch (52) to switch.