Maximum power point tracking method and system thereof
First Claim
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1. A maximum power point tracking method comprising:
- configuring a voltage tuning direction of a power converter by a process circuit, such that an input voltage of the power converter changes in a positive trend or in a negative trend;
detecting the input voltage and an input current of the power converter at a first time point to obtain a first power value;
detecting the input voltage and the input current of the power converter at a second time point after the first time point to obtain a second power value;
detecting the input voltage and the input current of the power converter at a third time point after the second time point to obtain a third power value; and
changing the voltage tuning direction of the power converter on the condition that the first power value is greater than the second power value, and the second power value is greater than the third power value, such that the change of the input voltage switches from the positive trend to the negative trend, or from the negative trend to the positive trend.
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Abstract
A maximum power point tracking method includes: configuring a voltage tuning direction of a power converter by a process circuit such that the input voltage of the power converter changes in a positive or a negative trend; detecting the corresponding input voltage and input current of the power converter sequentially to obtain multiple powers; and when the powers decrease for N times continuously, change the voltage tuning direction of the power converter such that the change of the input voltage switches from positive trend to negative trend, or from negative trend to positive trend, in which N is an integer greater than or equal to 2.
12 Citations
20 Claims
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1. A maximum power point tracking method comprising:
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configuring a voltage tuning direction of a power converter by a process circuit, such that an input voltage of the power converter changes in a positive trend or in a negative trend; detecting the input voltage and an input current of the power converter at a first time point to obtain a first power value; detecting the input voltage and the input current of the power converter at a second time point after the first time point to obtain a second power value; detecting the input voltage and the input current of the power converter at a third time point after the second time point to obtain a third power value; and changing the voltage tuning direction of the power converter on the condition that the first power value is greater than the second power value, and the second power value is greater than the third power value, such that the change of the input voltage switches from the positive trend to the negative trend, or from the negative trend to the positive trend. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A maximum power point tracking method comprising:
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configuring a voltage tuning direction of a power converter by a process circuit such that an input voltage of the power converter changes in a positive or a negative trend; detecting the corresponding input voltage and input current of the power converter sequentially to obtain multiple power values by a detecting circuit; and on the condition that the power values decrease for N times continuously, changing the voltage tuning direction of the power converter such that the change of the input voltage switches from a positive trend to a negative trend, or from a negative trend to a positive trend, wherein N is an integer greater than or equal to 2. - View Dependent Claims (9, 10, 11, 12, 13)
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14. A maximum power point tracking system, comprising:
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a power converter electrically coupled to a solar power module and configured to receive an input voltage from the solar power module and convert the input voltage to an output voltage; a detecting circuit electrically coupled to the power converter and configured to detect the input voltage and an input current; a processing circuit electrically coupled to the power converter and the detecting circuit, and configured to output a control signal to control the power converter according to the input voltage and the input current of the power converter; and wherein the processing circuit is configured to output the corresponding control signal to control the input voltage of the power converter changes in a positive trend or in a negative trend, and obtain multiple power values according to the input voltage and the input current, on the condition that the processing circuit is operated under a power point tracking mode, the processing circuit is configured to output the corresponding control signal to change a voltage tuning direction of the power converter such that the change of the input voltage switches from a positive trend to a negative trend, or from a negative trend to a positive trend if the power values decrease for N times continuously, wherein N is an integer greater than or equal to 2. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification