讨论了依据3种不同载荷测量量的独立变桨控制,分别为叶片面外弯矩、轮毂旋转坐标系下的弯矩和机舱坐标系下的面外弯矩。结果表明:3种载荷测量方式的实施和维护的难度是依次递减的;与没有独立变桨控制的情况相比,3种方式均能有效地降低叶片面外载荷谐波分量及传递给机组其他部件的载荷;载荷控制并未明显影响机组的发电功率,但显著增加了变桨机构的动作量。
Abstract
Individual pitch control was studied based on following 3 different load measurements, such as the blade root out-of-plane bending moment, rotating hub bending moment and fixed hub out-of-plane bending moment. Results show that the difficulty of above 3 measurement ways in implementation and maintenance is successively decreasing. Compared with controllers without load control, the controllers based on above 3 load measurements are able to cut down load fluctuations, so the load transmitted to other parts of the wind turbine would be reduced accordingly. Moreover, the load control shows no obvious influence on the power output of the wind turbine, but the pitch actuators would work more frequently.
关键词
风电机组 /
载荷控制 /
独立变桨 /
载荷测量量
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Key words
wind turbine /
load control /
individual pitch control /
load measurement
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参考文献
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脚注
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