SOLAR POWER GENERATION SYSTEM, CONTROL DEVICE USED FOR SOLAR POWER GENERATION SYSTEM, AND CONTROL METHOD AND PROGRAM FOR SAME
First Claim
1. A method of controlling and status-monitoring for a light generation system comprising, a light generation unit for generating an electric power responsive to incident light, an electric voltage detection means for detecting a voltage output from the light generation unit, an electric current detection means for detecting an electric current output from the light generation unit, and an electric power convention means having a switching element connected between output terminals of the light generation unit,said method comprising:
- making the switching element operate at a first operation condition to result in a first voltage status between the output terminals of the light generation unit,thereafter, making the switching element operate at a second operation condition different to the first operation condition to be transited the status between the output terminals of the light generation unit, from the first voltage status to a second voltage status different to the first voltage status, andduring the above transition, judging the light generation unit as abnormal status when a detected current input from the electric current detection means and a detected voltage input from the electric voltage detection means exceed a predetermined current and voltage relationship of the light generation unit.
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Accused Products
Abstract
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.
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Citations
28 Claims
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1. A method of controlling and status-monitoring for a light generation system comprising, a light generation unit for generating an electric power responsive to incident light, an electric voltage detection means for detecting a voltage output from the light generation unit, an electric current detection means for detecting an electric current output from the light generation unit, and an electric power convention means having a switching element connected between output terminals of the light generation unit,
said method comprising: -
making the switching element operate at a first operation condition to result in a first voltage status between the output terminals of the light generation unit, thereafter, making the switching element operate at a second operation condition different to the first operation condition to be transited the status between the output terminals of the light generation unit, from the first voltage status to a second voltage status different to the first voltage status, and during the above transition, judging the light generation unit as abnormal status when a detected current input from the electric current detection means and a detected voltage input from the electric voltage detection means exceed a predetermined current and voltage relationship of the light generation unit. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A light generation system comprising:
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a light generation unit generating an electric power responsive to incident light; a voltage detection means for detecting a voltage output from the light generation unit; a current detection means for detecting a current output from the light generation unit; an electric power convention means having a switching element connected between output terminals of the light generation unit; and a controlling means, said controlling means performing the following operations; making the switching element operate at a first operation condition to result in a first voltage status between terminals of the light generation unit, thereafter, making the switching element operate at a second operation condition different to the first operation condition to be transited the status between the output terminals of the light generation unit, from the first voltage status to a second voltage status different to the first voltage status, and during the above transition, judging the light generation unit as abnormal status when a detected current input from the electric current detection means and a detected voltage input from the electric voltage detection means exceed a predetermined current and voltage relationship of the light generation unit. - View Dependent Claims (8, 9, 10, 11, 12)
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13. An apparatus of controlling and status-monitoring for a light generation system comprising, a light generation unit for generating an electric power responsive to an incident light, an electric voltage detection means for detecting a voltage output from the light generation unit, an electric current detection means for detecting an electric current output from the light generation unit, and an electric power convention means having a switching element connected between output terminals of the light generation unit,
said apparatus performing the following operations, making the switching element operate at a first operation condition to result in a first voltage status between the output terminals of the light generation unit, thereafter, making the switching element operate at a second operation condition different to the first operation condition to be transited the status between the output terminals of the light generation unit, from the first voltage status to a second voltage status different to the first voltage status, and during the above transition, judging the light generation unit as abnormal status when a detected current input from the electric current detection means and a detected voltage input from the electric voltage detection means exceed a predetermined current and voltage relationship of the light generation unit.
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14. A light power generation system comprising:
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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 opening and closing between output terminals of the light power generation unit, converting the output voltage between the output terminals of the light power generation unit, and outputting the power corresponding to the converted voltage; and a controlling means for alternately performing a control operation of a maximum power detection mode for detecting the maximum power of the light power generation unit, and a control operation of a tracking operation mode for performing a follow-up control to be output the power of the light power generation unit at the detected maximum power; wherein the controlling means, in the maximum power detection mode, makes the switching element in the power converting means operate to open and close the output terminals of the light power generation unit to result in first voltage state, makes the switching element in the power converting means operate to open and close the output terminals of the light power generation unit to be changed the voltage between the output terminals of the light power generation unit to result in a second voltage state different to the first voltage state from the first voltage state and, during the above change of the voltage state, detects the time at which the power of the product of the voltage detected by the voltage detecting means and the current detected by the current detecting means or the power detected by the power detecting means becomes the maximum, and detects the voltage detected by the voltage detecting means at the time when detecting the maximum power as the optimal output voltage, and in the tracking operation mode, makes the switching element operate open and close so that a difference between a reference voltage and the voltage detected by the voltage detecting means becomes “
0”
or almost “
0”
with reference to the optimal output voltage as the reference voltage. - View Dependent Claims (15, 16, 17, 18, 19)
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20. A control device which is applied to a light power generation control system having:
- a light power generation unit which generates power in accordance with incident light;
a voltage detecting means for detecting a terminal 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; and
a power converting means which includes a switching element for opening and closing between output terminals of the light generation unit, converts the output voltage between the output terminals of the light power generation unit, and outputs power corresponding to the converted voltage, whereinthe control device alternately performs a control operation in a maximum power detection mode for detecting the maximum power of the light power generation unit and a control operation in a tracking operation mode for performing a follow-up control to be output the power of the light power generation unit at the detected maximum power, the control device, in the maximum power detection mode, makes the switching element in the power converting means operate to open and close the output terminals of the light power generation unit to result in a first voltage state, makes the switching element in the power converting means operate to open and close the output terminals of the light power generation unit to be changed the voltage between the output terminals of the light generation unit to result in a second voltage state different to the first voltage state from the first voltage state and, during the above change of the voltage state, detects the 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 detects the voltage which was detected by the voltage detecting means at the time when detecting the maximum power as the optimal output voltage, and in the tracking operation mode, with reference to the optimal output voltage as the reference voltage, makes the switching element operate open and close so that the difference between the reference voltage and the voltage detected by the voltage detecting means becomes “
0”
or almost “
0”
. - View Dependent Claims (21, 22, 23, 24, 25)
- a light power generation unit which generates power in accordance with incident light;
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26. A control method which is applied to a light power generation system having:
- a light power generation unit which generates power in accordance with incident light;
a voltage detecting means for detecting a terminal 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; and
a power converting means including a switching element for opening and closing between terminals of the light generation unit and converting the output voltage between the output terminals of the light power generation unit and outputting power corresponding to the converted voltage, whereinthe control method carrying out alternately performing a control operation in a maximum power detection mode for detecting the maximum power of the light power generation unit and a control operation in a tracking operation mode for performing a follow-up control to be output the power of the light power generation unit at the detected maximum power, said method comprises the steps of, in the maximum power detection mode, making the switching element in the power converting means operate to open and close the output terminals of the light power generation unit to result in a first voltage state, making the switching element in the power converting means operate to open and close the output terminals of the light power generation unit to be changed the voltage between the output terminals of the light generation unit to result in a second voltage state different to the first voltage state from the first voltage state and, during the above change of the voltage state, detecting the time at which the power of the product of the voltage detected by the voltage detecting means and the current detected by the current detecting means or the power detected by the power detecting means becomes the maximum, and detecting the voltage detected by the voltage detecting means at the time when detecting the maximum power as the optimal output voltage, and in the tracking operation mode, with reference to the optimal output voltage as the reference voltage, making the switching element operate to open and close so that a difference between the reference voltage and the voltage detected by the voltage detecting means becomes “
0”
or almost “
0”
. - View Dependent Claims (27)
- a light power generation unit which generates power in accordance with incident light;
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28. A program for making a computer run processing for controlling a light power generation system having:
- a light power generation unit which generates power in accordance with incident light;
a voltage detecting means for detecting a terminal 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; and
a power converting means including a switching element for opening and closing between output terminals of the light power generation unit and converting an output voltage between the output terminals of the light power generation unit and outputting power corresponding to the converted voltage, whereinthe program having routines of alternately performing a control operation in a maximum power detection mode for detecting the maximum power of the light power generation unit and a control operation in a tracking operation mode for performing a follow-up control to be output the power of the light power generation unit at the detected maximum power, makes the computer run a first routine of making the switching element in the power converting means operate to open and close the output terminals of the light power generation unit in the maximum power detection mode to result in a first voltage state, a second routine of making the switching element in the power converting means operate to open and close the output terminals of the light power generation unit to be changed the voltage between the output terminals of the light power generation unit to result in a second voltage state different to the first voltage state from the first voltage state and, during the above change of the voltage state, detecting the time at which the power of the product of the voltage detected by the voltage detecting means and the current detected by the current detecting means or the power detected by the power detecting means becomes the maximum and detecting the voltage detected by the voltage detecting means at the time when detecting the maximum power as the optimal output voltage, a third routine of switching the operation from the maximum power detection mode to the tracking operation mode, and a fourth routine of, with reference to the optimal output voltage as the reference voltage, making the switching element operate to open and close so that the difference between the reference voltage and the voltage detected by the voltage detecting means becomes “
0”
or almost “
0”
in the tracking operation mode.
- a light power generation unit which generates power in accordance with incident light;
Specification