Maximum power point tracking converter
AssigneeSamsung SDI Co., Ltd.
InventorSungchun Cho
Life of this patent
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Abstract
A maximum power point tracking (MPPT) converter of a renewable energy storage system for tracking and extracting a maximum power from a renewable energy source to provide the maximum power to a DC link. The MPPT converter includes an MPPT controller changing a controlled variable for maximum power point extraction in proportion to a current slope of the renewable energy source, and an MPPT extractor extracting a maximum power from the renewable energy source and converting the extracted maximum power in response to a control of the MPPT controller. The controlled variable variation is set to a large value if the current slope is out of a predetermined current slope range, and the controlled variable variation is set to a small value if the current slope is within the predetermined current slope range.
Claims20
A maximum power point tracking (MPPT) converter of a renewable energy storage system, comprising:
- an input terminal receiving electrical power from a renewable energy source;
- an MPPT controller changing a controlled variable in proportion to a current slope of electrical current following from the renewable energy source, setting a variation of the controlled variable to a relatively large value when the current slope is without a predetermined current slope range, and setting the variation of the controlled variable to a relatively small value when the current slope is within the predetermined current slope range;
- an MPPT extractor extracting the electrical power from the renewable energy source and converting the extracted electrical power in response to the controlled variable and the variation of the controlled variable set by the MPPT controller;
- and
- an output terminal providing the converted electrical power to a DC link,
- said current slope defined as a ratio of a current variation divided by a corresponding time variation.
A maximum power point tracking (MPPT) method of a renewable energy storage system, the method comprising:
- sensing an input current and an input voltage provided from a renewable energy source;
- determining a current slope from the input current;
- determining whether the current slope is within a predetermined current slope range or not;
- setting a variation of a controlled variable to be a relatively small value when the current slope is determined to be within the predetermined current slope range, the controlled variable variation being used for maximum power extraction from the renewable energy source;
- setting the variation of the controlled variable to be a relatively large value when the current slope is determined to be not within the predetermined current slope range;
- and
- providing a signal to control a power converter in response to the variation of the controlled variable,
- said current slope defined as a ratio of a current variation divided by a corresponding time variation.
Dependencies are inferred from the claim text.