Super capacitor state detection method, variable pitch system and wind generating set
A technology of wind turbines and supercapacitors, which is applied in the field of wind power, can solve the problems of inability to accurately detect the operation status of supercapacitors and detection, and achieve the effects of wide application range, improved efficiency and accurate detection
Pending Publication Date: 2022-02-18
BEIJING GOLDWIND SCI & CREATION WINDPOWER EQUIP
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Problems solved by technology
[0006] Aiming at the shortcomings of the existing methods, the present application proposes a state detection method for supercapacitors, a pitch system and a wind power generator set to solve the problem that the existing supercapacitor detection methods cannot accurately detect the operating state of the supercapacitor, and the The technical problem that the detection cannot be performed when the voltage of the capacitor is basically constant
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[0031] The present application is described in detail below, and examples of embodiments of the present application are shown in the drawings, wherein the same or similar reference numerals denote the same or similar components or components having the same or similar functions throughout. Also, detailed descriptions of known technologies will be omitted if they are not necessary to illustrate the features of the present application. The embodiments described below by referring to the figures are exemplary only for explaining the present application, and are not construed as limiting the present application.
[0032] Those skilled in the art can understand that, unless otherwise defined, all terms (including technical terms and scientific terms) used herein have the same meanings as commonly understood by those of ordinary skill in the art to which this application belongs. It should also be understood that terms, such as those defined in commonly used dictionaries, should be ...
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The invention provides a super capacitor state detection method, a variable pitch system and a wind generating set. The super capacitor state detection method comprises the steps of when a super capacitor in the wind generating set is in a charging state, acquiring a plurality of charging current values of charging current output to the super capacitor by a charger; determining the fluctuation condition of the charging current according to the plurality of charging current values; and determining whether the running state of the super capacitor is normal or not according to the fluctuation condition of the charging current. According to the invention, the voltage fluctuation of the super capacitor can be detected more accurately, and the overall operation state of the super capacitor can be detected more accurately, so that workers can be helped to improve the troubleshooting efficiency; and meanwhile, the embodiment of the invention can meet the detection requirement of the super capacitor under the condition that the voltage of the super capacitor is kept constant, and the application range is wider.
Description
technical field [0001] The present application relates to the technical field of wind power, and in particular, the present application relates to a state detection method of a supercapacitor, a pitch control system and a wind power generating set. Background technique [0002] In the pitch system of wind turbines, the role of supercapacitors as backup power is: when the power grid fails (such as power failure or low-voltage ride-through), the pitch system needs a backup power supply to supply power for the operation of retracting the propeller. To prevent major accidents, it is crucial to strictly monitor the performance of the backup power supply. [0003] Supercapacitors are prone to abnormalities due to factors such as shell damage, electrolyte decomposition, electrode degradation (such as partial damage to the activated carbon electrode structure or deposition of impurities on the electrode surface) and loose wiring. Therefore, it is necessary to monitor the daily opera...
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Patent Timeline
Login to View More IPC IPC(8): G01R31/64H02J7/34H02J3/00H02J3/38
CPCG01R31/64H02J7/345H02J3/0073H02J3/381H02J2207/50H02J2300/28
Inventor 王大为张智勇马磊
Owner BEIJING GOLDWIND SCI & CREATION WINDPOWER EQUIP