Wind generating set and avoiding rotating speed control method and device thereof
A technology for wind turbines and speed control, which is applied in the control of wind turbines, engine control, wind turbines, etc., can solve problems such as unit resonance and load increase, and achieve the effect of ensuring safety and reliability.
Active Publication Date: 2021-12-28
BEIJING GOLDWIND SCI & CREATION WINDPOWER EQUIP CO LTD
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Problems solved by technology
However, the speed of wind turbines is often in or frequently enters the avoidance speed range, which will cause unit resonance, load increase or other safety problems
Method used
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[0028] Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like numerals refer to like parts throughout. The embodiments are described below in order to explain the present invention by referring to the figures.
[0029] figure 1 A flow chart showing a method for controlling a speed avoidance of a wind power generating set according to an exemplary embodiment of the present invention.
[0030] In step S10, when an instruction of power-limited operation is received, an upper limit of the power value required by the instruction is determined.
[0031] As an example, the command of power-limited operation may be received from the central control of the wind farm or the cluster controller of the wind farm. For example, the wind farm may issue a power-limited operation instruction to the generator set due to power shortage and other reasons.
[0032] In step S20, it is determined whe...
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The invention provides a wind generating set and an avoiding rotating speed control method and device thereof. The method comprises the steps that when an instruction of limited power running is received, the power value upper limit required by the instruction is determined; whether the required power value upper limit is in an avoiding power interval corresponding to an avoiding rotating speed interval or not is determined; and when the required power value upper limit is in the avoiding power interval, the maximum allowable power value of the wind generating set is set as the lower boundary value of the avoiding power interval, wherein the upper boundary value of the avoiding power interval is the power value determined based on the upper boundary value of the avoiding rotating speed interval, the lower boundary value of the avoiding power interval is the power value determined based on the lower boundary value of the avoiding rotating speed interval, and the avoiding rotating speed interval and the avoiding power interval are open intervals. The problems of unit resonance abnormity, load overrun and the like caused by the situation that the rotating speed running range of the wind generating set in the limited power running state coincides with the avoiding rotating speed interval can be avoided, and the safety and the reliability of unit running are guaranteed.
Description
technical field [0001] The present invention generally relates to the technical field of wind power generation, and more specifically, relates to a wind power generating set and its speed avoidance control method and device. Background technique [0002] As the capacity of wind turbines increases, wind turbines equipped with high flexible towers have gradually become a trend due to their high power generation performance and low cost. However, due to the low natural frequency of the high flexible tower itself, the multiplier frequency component in the operating speed of the unit will overlap with the natural frequency of the high flexible tower. In the conventional design, in order to avoid resonance between the unit and the first-order frequency of the tower at the minimum speed, the value of the minimum speed is limited. However, due to the fact that the rated speed of some large impeller units is very low, if the above-mentioned restrictions on the minimum speed are met,...
Claims
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IPC IPC(8): F03D7/00
CPCF03D7/00F05B2260/96F05B2270/327F05B2270/335Y02E10/72F03D7/0276F03D7/028F03D7/0298H02P2101/15H02P2103/20F03D7/0296F05B2270/101H02P9/008
Inventor 张新丽
Owner BEIJING GOLDWIND SCI & CREATION WINDPOWER EQUIP CO LTD