Photovoltaic power generation system

A photovoltaic power generation system which generates a DC power at a string composed by connecting plural photovoltaic panels in parallel and said photovoltaic panels, converts said DC power by a power converter connected to said string and supplies it to a load, wherein:

• said respective photovoltaic panels comprising a voltage detection section for detecting a voltage value generated in said photovoltaic panel and a power detection section for detecting an energy generated in said photovoltaic panel;
• further comprising power charge sections connected to said photovoltaic panels in series and a maximum power point tracking (MPPT) control section for controlling a voltage value charged by said power charge section;
• wherein said power charge section comprises a DC power source for power charge, a charge power adjustment section for adjusting a voltage for charging, and a power measurement section for measuring a charged energy;
• and
• wherein said MPPT control section controls said respective photovoltaic panels so as to have a voltage at a maximum power point of said respective photovoltaic panels, and controls said charge power adjustment section so that a net output power Wnet (W1−W2) which is a difference between an energy (W1) at said maximum power point and a charge energy (W2) measured by said power measurement section becomes maximum.

A photovoltaic power generation system which generates a DC power at a string composed by connecting plural photovoltaic panels in series and said photovoltaic panels, converts said DC power by a power converter connected to said string and supplies it to a load, wherein:

• said respective photovoltaic panels comprising a voltage detection section for detecting a voltage value generated at said photovoltaic panel and a power detection section for detecting an energy generated in said photovoltaic panel;
• further comprising power charge sections connected to said photovoltaic panels in parallel and a maximum power point tracking (MPPT) control section for controlling a current value charged by said power charge section;
• wherein said power charge section comprises a DC power source for power charge, a charge power adjustment section for adjusting a current for charging, and a power measurement section for measuring a charged energy;
• and
• wherein said MPPT control section controls said respective photovoltaic panels so as to have a voltage at a maximum power point of said respective photovoltaic panels, and controls said charge power adjustment section such that a net output power Wnet (W1−W2) which is a difference between an energy (W1) at said maximum power point and a charge energy (W2) measured by said power measurement section becomes maximum.