SOLAR POWER GENERATION SYSTEM

摘要

PURPOSE: To positively detect the individual operation of an inverter without generating a power loss. CONSTITUTION: In a solar power generation system where an inverter 22 for converting a DC power generated by a solar cell 21 to AC is joined to a system power supply 23 by a system interconnection device 24, the inverter 22 monitors the individual operation of the inverter 22 due to a system separation using a voltage detection circuit 31 or a frequency detection circuit 32. Then, the system separation is generated, the phase jump or the frequency fluctuation of a system voltage is detected by the voltage detection circuit 31 or the frequency detection circuit 32 and the detection signal is directly transmitted to an output control circuit 33. A control signal is transmitted to a main circuit 28 by the output control circuit 33, thus decreasing the output of the inverter 22.