| 摘要 |
PROBLEM TO BE SOLVED: To improve the use efficiency of power at the time of independent operation and low output linking operation by stably executing the maximum power point tracking control in spite of the large change of sunshine. SOLUTION: A controller 19 receives a limit signal from a limit circuit 60 and limits a reference current value ID1* in the case of VD2L*<VD2. A generation power operation circuit 61 operates an output power P1' of a solar battery 2, and an output power operation circuit 62 multiplies it by efficiency to obtain an output power PO of an inverter circuit 4. This output power PO is fed forward, and further, the voltage VD2 is fed back through a controller 27, thus quickly and stably controlling the output power of the inverter circuit 4. At the time of independent operation and low output linking operation, a reference voltage value VD1 for maximum power point tracking control preliminarily stored in a memory circuit is read out and used. |
