A solar photovoltaic power generation simulator power-supply apparatus comprising: a power conversion main circuit having a power receiving end of a commercial power supply, a converter circuit which changes an alternating current to a direct current, a smoothening capacitor sequentially connected to the output side of the converter circuit, an input current detecting unit, a power control chopper including a semiconductor switching element, an output voltage detecting unit for detecting an output voltage of the power conversion main circuit, an output current detecting unit for detecting an output current of the power conversion main circuit, and an output terminal; and a control signal circuit which controls the output voltage and the output current of the power conversion main circuit, the control signal circuit including: an IV storing means for storing a plurality of IV curves (C1, C2,... Cn) which are produced based on annual fluctuation in the amount of solar irradiation, each of the IV curves indicating relation between current and voltage satisfying an output characteristic of a solar photovoltaic power generation module; a first IV reading means for reading an IV curve, designated by an IV curve number designating means, from among the plurality of IV curves (C1, C2,...Cn) stored in the IV storing means; a current value designating means for designating a current value on the read IV curve; a second IV reading means for reading a voltage value on the read IV curve, associated with the current value designated by the current value designating means; a target value generating means for generating a control target value based on the voltage value read by the second IV reading means and the current value designated by the current value designating means; a feedback control circuit for controlling the semiconductor switching element based on a difference between the control target value and the output voltage/current of the power conversion main circuit, the output voltage and the output current being controlled so as to satisfy the read IV curve; and a feedforward control circuit for controlling the semiconductor switching element based on a difference between an input signal from the input current detecting unit and an output signal from a reference value generator. an IV storing means for storing a plurality of IV curves (C1, C2,... Cn) which are produced based on annual fluctuation in the amount of solar irradiation, each of the IV curves indicating relation between current and voltage satisfying an output characteristic of a solar photovoltaic power generation module; a first IV reading means for reading an IV curve, designated by an IV curve number designating means, from among the plurality of IV curves (C1, C2,...Cn) stored in the IV storing means; a current value designating means for designating a current value on the read IV curve; a second IV reading means for reading a voltage value on the read IV curve, associated with the current value designated by the current value designating means; a target value generating means for generating a control target value based on the voltage value read by the second IV reading means and the current value designated by the current value designating means; a feedback control circuit for controlling the semiconductor switching element based on a difference between the control target value and the output voltage/current of the power conversion main circuit, the output voltage and the output current being controlled so as to satisfy the read IV curve; and a feedforward control circuit for controlling the semiconductor switching element based on a difference between an input signal from the input current detecting unit and an output signal from a reference value generator.