Method for reducing wind turbine loads during non-generating operation
A wind turbine, non-power generation technology, applied in the control of wind turbines, wind turbines, motors, etc., can solve problems such as reducing wind turbine load fluctuations, reducing wind turbine design requirements and related costs, reducing wind turbine loads, etc. Reduce the ultimate load and fatigue load, reduce the fluctuation range, reduce the effect of large fluctuations in thrust
Active Publication Date: 2019-08-06
YUANJIAN WIND POWER JIANGYINENVISION ENERGY CO LTD
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Problems solved by technology
[0005] The present invention is aimed at the hidden dangers of wind turbines when the grid-connected system, yaw system and wind direction detection system are in failure or temporarily off-line, and proposes a method for reducing the load of wind turbines during non-power generation operation. In the grid-connected system , yaw system or wind direction detection system failure or temporary offline, by adjusting the different pitch angles of different blades, reduce the load fluctuation of the wind turbine on the plane of the wind rotor under different inflow winds, thereby reducing the design requirements and related costs of the wind turbine
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[0019] The non-power generation operation state includes: the grid-connected system, the yaw system and the wind direction detection system are in failure or temporarily offline. During this period, in order to reduce the load of the wind turbine, after a large number of experiments and simulation tests, it is obtained that during the period when the wind turbine is in the non-power generation operation state, the adjustment of the wind rotor blades in the virtual vertical assembly state on the plane perpendicular to the horizontal inflow wind direction of 0 to 360 degrees When the change range of the projected area meets the condition that the change range is less than 90%, the wind turbine load can be greatly reduced, such as figure 1 The schematic diagram of the virtual vertical assembly state of the wind turbine is shown, wherein, the wind rotor blades in the virtual vertical assembly state refer to the virtual rotation of each blade along the main shaft axis of the wind ro...
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The invention relates to a method for reducing loads of a horizontal-axis wind turbine during non-generating operation. When a grid-connected system, a yaw system and a wind-direction detection systemof the wind turbine break down or are in a temporary off-line state, the projected area variation amplitude of wind turbine blades in a virtual vertical collection state on the horizontal inflow windplane perpendicular to 0-360 degrees is adjusted, and the variation amplitude is smaller than 90%, so that drastic thrust fluctuation caused by sharp change of the windward area of the blades in different inflow wind directions is reduced, the extreme load condition in a certain wind direction is prevented and limit loads and fatigue loads of the wind turbine are reduced.
Description
technical field [0001] The invention relates to a processing method for a non-power generating running state of a wind turbine, in particular to a method for reducing the load of the wind turbine during the non-power generating running. Background technique [0002] When the wind turbine is connected to the grid for power generation, the yaw system and the wind direction detection system are normal, the pitch angle of the wind rotor blades maintains the same feathered position and the wind rotor face is kept facing the wind through the yaw action. Variations in load fluctuations caused by wind turbines. [0003] There are three main situations where the wind turbine cannot achieve yaw or correct yaw: 1. The grid-connected system fails or is temporarily offline. In this case, the wind turbine has no power input, and the yaw system cannot achieve yaw action without power input; 2. The yaw system is faulty or temporarily offline. In this case, although the wind turbine has pow...
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IPC IPC(8): F03D7/02
CPCF03D7/0224F03D7/024F05B2260/70F05B2270/107Y02E10/72
Inventor 徐斌李磊韦晓晖刘俊
Owner YUANJIAN WIND POWER JIANGYINENVISION ENERGY CO LTD