Control method and module for preventing overspeed of wind generating set

A technology of a wind power generating set and a control method, which is applied to the control of wind power generators, wind power generators, engine control, etc., and can solve problems such as increased cost per kilowatt-hour of wind power generating sets, increased unit weight and cost, and uneven existing technologies , to achieve the effect of improving unit competitiveness, optimizing fan load, and avoiding downtime

Active Publication Date: 2021-03-19
GUANGDONG MINGYANG WIND POWER IND GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Improve the safety performance of the unit by strengthening the strength of the unit components, that is, increase the size of the unit components or replace them with materials with better performance, which will inevitably increase the weight and cost of the un...

Method used

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  • Control method and module for preventing overspeed of wind generating set
  • Control method and module for preventing overspeed of wind generating set
  • Control method and module for preventing overspeed of wind generating set

Examples

Experimental program
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Effect test

Embodiment 1

[0049] Such as figure 1 As shown, this embodiment provides a control method for preventing overspeeding of wind turbines, which is a control strategy for preventing overspeeding and load reduction based on the product of the front and rear acceleration of the nacelle of the wind turbine and the deviation of the generator speed: First, real-time measurement by sensors The front and rear acceleration of the nacelle, the pitch angle and the generator speed, and then calculate the generator speed deviation according to the set value of the generator speed, and then multiply the front and rear acceleration of the nacelle by the generator speed deviation to obtain the monitoring index value of whether to start the pitch control strategy, and then According to the real-time pitch angle linear interpolation, the corresponding threshold value is obtained. When the monitoring index value is greater than or equal to the threshold value, the pitch adjustment strategy is started, that is, a...

Embodiment 2

[0073] The conventional controller of the wind turbine consists of two parts: the torque controller and the pitch controller: the torque controller works when the wind speed is below the rated wind speed, and is used to capture the maximum wind energy; the pitch controller is used when the wind speed is above the rated wind speed, through Adjust the pitch angle to keep the generator speed near the rated speed to ensure the normal operation of the fan and ensure that the output power of the unit is at the rated power. However, considering the hysteresis of the pitch angle following, especially when the unit encounters EOG wind conditions, the generator speed rises rapidly or even exceeds the speed, and the violent and frequent pitch changes cause the thrust fluctuation of the fan, which aggravates the front and rear vibration of the nacelle. Therefore, the nacelle The two variables of front and rear acceleration and generator speed deviation are introduced into the unit controll...

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Abstract

The invention discloses a control method and module for preventing overspeed of a wind generating set. According to the method, firstly, a cabin front and back acceleration, a pitch angle and a generator speed are measured in real time through a sensor, and a generator speed deviation is calculated according to a generator speed set value; secondly, the cabin front and back acceleration is multiplied by the generator speed deviation to obtain a monitoring index value for judging whether to start a pitch adjustment strategy, a corresponding threshold value is obtained according to real-time pitch angle linear interpolation, and the pitch adjustment strategy is started when the monitoring index value is greater than or equal to the threshold value; in other words, an additional pitch angle is superposed in an original pitch changing instruction output by a pitch changing controller of the wind generating set so as to achieve the purpose of inhibiting sharp increase of the generator speedin advance, or otherwise the pitch adjustment strategy is not started; and finally, a pitch changing actuator adjusts the pitch angle of a blade according to the pitch changing instruction sent by the pitch changing controller. Therefore, load optimization control of the wind generating set based on the cabin front and back acceleration and the generator speed deviation is realized.

Description

technical field [0001] The invention relates to the technical field of wind power generators, in particular to a control method and module for preventing wind power generators from overspeeding. Background technique [0002] With the development of wind power generation technology and the demand of the market to reduce the cost of electricity, the capacity of wind turbines is getting larger and longer, and the blades are getting longer and longer, and the units often operate in relatively harsh external environments, which causes the load of the units to increase. Large, it poses a great challenge to the design and operation of the unit, and brings potential risks to the owner's economic benefits. [0003] When the unit encounters EOG gust wind conditions accompanied by power failure of the power grid, the unit will bear a huge unfavorable load. The process is described as follows: EOG gust (Annual extreme operation gust, EOG for short, commonly known as straw hat wind), the...

Claims

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Application Information

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IPC IPC(8): F03D7/00
CPCF03D7/00F05B2260/70F05B2270/1011F05B2270/20F05B2270/327F05B2270/328Y02E10/72
Inventor 周玲任永邹荔兵卢军王超王伟张广兴
Owner GUANGDONG MINGYANG WIND POWER IND GRP CO LTD
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