| 摘要 |
PURPOSE:To always obtain the maximum output power regardless of the change of the irradiated light quantity or the temperature change of elements, by using a generator for voltage command correction value that delivers the correction value based on the output voltage and the output current of a solar battery. CONSTITUTION:Both the DC current and voltage detectors 18 and 20 detect the output current Id and the output voltage Vd of a solar battery 10 respectively. Then a generator 22 for voltage command correction value samples periodically both current Id and voltage Vd obtained by detectors 18 and 20 respectively for calculation of the output power (Pd=IdXVd). The changing directions of the output power Pd and voltage Vd are judged for output of the voltage command correction value DELTAV. Then this value DELTAV and the voltage Vd are supplied to a voltage controller 24 and a converter 12 is controlled by the output of the controller 24. Thus it is possible to obtain the maximum output power at all times regardless of the change of the irradiated light quantity or the temperature change of elements.
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