Load Reduction Control Technology of Large-scale Wind Turbine Based on Individual Pitch Control
In order to reduce the imbalance load of large wind turbine during operation due to factors such as wind shear, tower shadow, turbulence and yaw error, a load reduction control technology based on individual pitch control is proposed. Blade root loads measured by the sensor are converted into tilt m...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | zho |
| Published: |
Editorial Office of Control and Information Technology
2013-01-01
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| Series: | Kongzhi Yu Xinxi Jishu |
| Subjects: | |
| Online Access: | http://ctet.csrzic.com/thesisDetails#10.13889/j.issn.2095-3631.2013.03.014 |
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| Summary: | In order to reduce the imbalance load of large wind turbine during operation due to factors such as wind shear, tower shadow, turbulence and yaw error, a load reduction control technology based on individual pitch control is proposed. Blade root loads measured by the sensor are converted into tilt moments and yaw moments by using theory of Coleman coordinate transformation. Tilt moments and yaw moments are controlled by using PI controllers. To compensate for the additional load caused by uneven wind, outputs of PI controllers are converted into fine-tuning pitch angle of blade by using Coleman inverse transformation. Collective pitch control technology and independent pitch control technology are compared for 5 MW wind turbine in this paper, the results show that: compared with collective pitch control technology, independent pitch control can reduce the imbalance load of wind turbine caused by wind shear, tower shadow effect and random turbulence through dynamic adjusting the pitch angle of each blade. Moreover, independent pitch control reduces loads of blade bearings, yaw bearings, main shaft, towers and other key parts of the wind turbine. |
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| ISSN: | 2096-5427 |