Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Auxiliary control method and device for lowering fan load under gust condition and fan controller

An auxiliary control device and auxiliary control technology, applied in the control of wind turbines, engine control, wind turbines, etc., can solve problems such as the safety of wind turbines, and achieve the effect of reducing the control process, smoothing the control process, and reducing missed judgments.

Active Publication Date: 2019-03-08
SANY ELECTRIC CO LTD
View PDF4 Cites 11 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of this, the purpose of the embodiments of the present invention is to provide an auxiliary control method, device and fan controller for reducing fan load under gust wind conditions, so as to improve the control effect of existing fans under gust wind conditions and the fan safety caused by gust wind. question

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Auxiliary control method and device for lowering fan load under gust condition and fan controller
  • Auxiliary control method and device for lowering fan load under gust condition and fan controller
  • Auxiliary control method and device for lowering fan load under gust condition and fan controller

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0048] see figure 2 , the present embodiment provides an auxiliary control method for gust wind conditions to reduce fan loads. The fan is in danger during working conditions. The gust wind condition reduces the fan load auxiliary control method including steps S10 to S30.

[0049] Step S10: Determine whether a gust of wind occurs.

[0050] Before adjusting the fan, first judge whether there is a gust of wind. One technique in the prior art is to measure and predict the wind speed, judge the occurrence of gust wind conditions according to the measured and estimated wind speed change characteristics, and then perform additional control on the pitch angle. The disadvantage of this method is that it is based on the current situation. The measurement of wind speed under certain technical conditions is inaccurate, and the wind speed changes irregularly, so the prediction is also inaccurate, which will cause misjudgment and missed judgment of gusts, affect the control effect, an...

no. 2 example

[0079] This embodiment provides an auxiliary control device 200 for gust wind condition reduction fan load, and the gust wind condition reduction fan load auxiliary control device 200 is used to implement the gust wind condition reduction fan load auxiliary control method provided in the first embodiment.

[0080] It should be noted that the basic principle of the auxiliary control device 200 for gust wind condition reduction fan load provided by this embodiment is basically the same as that of the hierarchical control method provided by the first embodiment. For a brief description, this embodiment will not describe in detail. This embodiment does not introduce details, please refer to the relevant content in the first embodiment.

[0081] see Figure 5 The gust wind condition reduction fan load auxiliary control device 200 includes: a judgment module 210 , a calculation module 220 and a control module 230 .

[0082] The judging module 210 is configured to judge whether a gu...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides an auxiliary control method and device for lowering the fan load under the gust condition and a fan controller, and relates to the technical field of wind power generation. Themethod includes the steps that whether gust occurs or not is judged according to rotating speed acceleration; when gust occurs, a pitch variation rate is calculated according to pneumatic resultant moment of a fan and pneumatic features of blades; and the blades are regulated according to the pitch variation rate. The rotating speed acceleration of the fan is selected as a threshold value variablefor judging occur of gust, thresholds under different wind speeds are obtained through comprehensive calculation according to operation power, a pitch angle and other variables of the fan, and thus the possibility of missed judging and erroneous judging can be reduced to the maximum extent. Meanwhile, the variation intensity of the speed of gust is represented by air moment, and thus output of apitch angle instruction is controlled according to the air moment; time delay is reduced in the control process, reaction is more sensitive, control is more timely and effective, the pitch angle control process for involving in or exiting normal power generation is smooth, and the influence on the pitch angle in normal operation is small.

Description

technical field [0001] The invention relates to the technical field of wind power generation, in particular to an auxiliary control method, device and fan controller for reducing fan load under gust wind conditions. Background technique [0002] One technique in the prior art is to measure and predict the wind speed, judge the occurrence of gust wind conditions according to the measured and estimated wind speed change characteristics, and then perform additional control on the pitch angle. The disadvantage of this method is that it is based on the current situation. The measurement of wind speed under certain technical conditions is inaccurate, and the wind speed changes irregularly, so the prediction is also inaccurate, which will cause misjudgment and missed judgment of gusts, affect the control effect, and threaten the safety of wind turbines. [0003] Another method is to use the average wind speed and average pitch angle for a period of time to limit the pitch angle of ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): F03D7/00
CPCF03D7/00F05B2270/328Y02E10/72
Inventor 杜佳佳张海涛闻攀
Owner SANY ELECTRIC CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com