| 摘要 |
PROBLEM TO BE SOLVED: To prevent a power generation efficiency of a distributed power source from degrading when a control circuit comprising a voltage rise suppressing function or a independent operation detecting function is made to exhibit its function satisfactorily. SOLUTION: A photovoltaic power generation device links a distributed power source 30 comprising a solar cell 1 and an inverter 2 to a power system. An electric water heater 8 of an electric capacity equal to the solar cell 1 of such level as to absorb a generated power of the solar cell 1 is integrally added on the AC side of the inverter 2. A control circuit 7 has a function to suppress rising of an AC side output voltage of the inverter 2 and a function to detect independent operation of the inverter 2. When the AC side output voltage of the inverter 2 rises and exceeds a specified value, the AC side output voltage of the inverter 2 is applied to the electric water heater 8 under the voltage rising suppressing command from the control circuit 7. If the variation in voltage waveform occurs in the power system, the electric water heater 8 is turned on/off under the independent operation detecting command from the control circuit 7. |
