Grid-connected module type photovoltaic power conversion apparatus

The present invention provides a photovoltaic power conversion apparatus in a grid-connected module type which can increase efficiency of power generation by changing operation modes according to a level of set point electric currents in one cycle. According to the present invention, the photovoltaic power conversion apparatus in a grid-connected module type includes a solar panel which outputs photovoltaic currents and photovoltaic voltages; a master flyback converter and a slave flyback converter which are connected in parallel to output terminals of the solar panel; a charging part which charges jointly with output of the master flyback converter and ouput of the slave flyback converter; an inverter which converts voltages of the charging part into which a positive half cycle is repeatedly input to alternating voltages, and outputs the alternating voltages; and a switching controlling part which uses the photovoltaic currents and the photovoltaic voltages to generate the set point electric currents flowing on a first side of a transformer of the master flyback converter with three or more modes.