Solar power generating device
First Claim
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1. A solar power generating device comprising:
- a solar cell, said solar cell having an output voltage;
a power converter for converting DC power output of said solar cell into AC power;
a voltage regulator for setting a virtual optimum operating voltage and a control voltage range of said solar cell on the basis of an output voltage of said solar cell immediately before startup of the power converter; and
a voltage controller for changing the output voltage of said solar cell in stages by a predetermined voltage change width in the direction in which the DC power output of said solar cell increases in the control voltage range, after the power converter has started up with the virtual optimum operation voltage taken as a target output voltage of said solar cell.
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Abstract
In order to obtain a solar power generating device capable of effectively using power generated by a solar cell, the virtual optimum operating voltage, the MPPT minimum voltage, the MPPT maximum voltage, and the low and high voltage change width switching voltages used when MPPT control is carried out are calculated on the basis of the output voltage of a solar panel immediately before the startup of the inverter circuit in the solar power generating device and the MPPT control is carried out on the basis of each of the calculated voltage values.
279 Citations
20 Claims
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1. A solar power generating device comprising:
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a solar cell, said solar cell having an output voltage; a power converter for converting DC power output of said solar cell into AC power; a voltage regulator for setting a virtual optimum operating voltage and a control voltage range of said solar cell on the basis of an output voltage of said solar cell immediately before startup of the power converter; and a voltage controller for changing the output voltage of said solar cell in stages by a predetermined voltage change width in the direction in which the DC power output of said solar cell increases in the control voltage range, after the power converter has started up with the virtual optimum operation voltage taken as a target output voltage of said solar cell. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method of generating solar power with a device which tracks the maximum operating point of a solar cell comprising:
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generating DC power with the solar cell, said DC power having an output voltage; converting said DC power into AC power with a power converter; setting a virtual optimum operating voltage and a control voltage range of said solar cell with a voltage regulator on the basis of an output voltage of said solar cell immediately before startup of the power converter; and changing the output voltage of said solar cell with a voltage controller in stages by a predetermined voltage change width in the direction in which the DC power output of said solar cell increases in the control voltage range, after the power converter has started up with the virtual optimum operation voltage taken as a target output voltage of said solar cell.
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14. A method for generating solar power with a device which tracks the maximum operating point of solar cell, comprising:
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generating DC power with the solar cell, said DC power having an output voltage; converting a DC power output of said solar cell into AC power with a power converter; setting a virtual optimum operating voltage, a control voltage range, and a fixed voltage with a voltage regulator on the basis of an output voltage of said solar cell immediately before the startup of said power converter; and controlling the output voltage in a first mode and a second mode, wherein in the first mode the output voltage of said solar cell is changed in stages by a predetermined voltage change width in the direction in which the DC power output of said solar cell increases in the control voltage range after the virtual optimum operating voltage has been set as a target output voltage of said solar cell and said power converter has been started up, and wherein the output voltage of said solar cell in the second mode is set as the fixed voltage when the DC power output of said solar cell is smaller than a predetermined power amount. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification