Solar power generation system, control device used for solar power generation system, and control method and program for same

摘要

In a light power generation system, a control device, a control method, and a program, efficient power can be supplied. The maximum power detection unit operates a MOSFET in a power converter circuit and open-circuits both ends of a solar cell panel in the maximum power detection mode. After that, the maximum power detection unit short-circuits both ends of the solar cell panel, detects a maximum power by monitoring the output power of the solar cell panel during a period from the open state to the short-circuited state, and defines the voltage of the solar cell panel as an optimal voltage when detecting the maximum power. In a tracking operation mode, the control unit performs PWM control with respect to the MOSFET by defining the optimal voltage to be a reference signal. Operations are repeated between the maximum power detection mode and the tracking operation mode.

主权项

1. A light power generation system comprising:
a light power generation unit for generating power in response to incident light; a voltage detecting means for detecting an output voltage of the light power generation unit; a current detecting means for detecting an output current of the light power generation unit, or a power detecting means for detecting an output power of the light power generation unit; a power converting means including a switching element for making an open state and close state between the output terminals of the light power generation unit, converting the voltage between the output terminals of the light power generation unit, and outputting a power corresponding to said voltage; and a controlling means for performing a control operation of a maximum power detection mode for detecting the maximum power of the light power generation unit at that time and a control operation of a tracking operation mode for carrying out a tracking control so that the maximum power detected in the maximum power detecting mode can be output from the light power generation unit, wherein the controlling means, in the maximum power detection mode, makes the switching element in the power converting means operate ON state and OFF state to result in a first voltage state between the output terminals of the light power generation unit, makes the switching element operate ON state and OFF state to change the state of the voltage between the output terminals of the light power generation, from the first voltage state to a second voltage state different to the first voltage state, and during a transition state moving from the first voltage state to the second voltage state, detects a time at which the power of the product of the voltage which was detected by the voltage detecting means and the current which was detected by the current detecting means or the power which was detected by the power detecting means becomes the maximum, and defines a voltage which was detected by the voltage detecting means at the time when detecting the maximum power as the optimal output voltage, and wherein, the controlling means, in the tracking operation mode, makes the switching element operate ON state and OFF state so that a difference between a reference voltage which is the optimal output voltage and the voltage which was detected by the voltage detecting means becomes “0” or almost “0”.