Title:
METHOD AND SYSTEM FOR CONTROLLING ROTATIONAL SPEED RESONANT FREQUENCY CROSSING OF FLEXIBLE TOWER WIND TURBINE
Document Type and Number:
WIPO Patent Application WO/2021/203612
Kind Code:
A1
Abstract:
A method and a system for controlling the rotational speed resonant frequency crossing of a flexible tower wind turbine. The method comprises: acquiring basic calculation data; processing acceleration ass of the left-right movement at the top of the tower; obtaining the root mean square of acceleration ass0 of the left-right movement at the top of the tower after a filter of an nth control period; and carrying out different running states according to a running flag bit A. The system comprises a tower modal online identification system (1), tower vibration sensors (2), and a speed measuring encoder (3), which are respectively connected to a system (4) for controlling the rotational speed resonant frequency crossing of a flexible tower wind turbine, the tower vibration sensors are uniformly installed on the tower from top to bottom. In the method and the system, adaptive control of a turbine rotational speed jump deviation value, a vibration amplitude, and a damping coefficient is achieved and the load of a flexible tower is reduced, thus ensuring the safety of a turbine; meanwhile, the wind turbine is enabled to operate in a maximum power point tracking mode for the majority of the time, evidently reducing power generation loss, and effectively improving the power generation efficiency of the wind turbine.
Inventors:
YING YOU (CN)
SUN YONG (CN)
CHEN QI (CN)
SHI XIAOMING (CN)
YANG JING (CN)
CHENG CHENGUANG (CN)
SUN YONG (CN)
CHEN QI (CN)
SHI XIAOMING (CN)
YANG JING (CN)
CHENG CHENGUANG (CN)
Application Number:
PCT/CN2020/112048
Publication Date:
October 14, 2021
Filing Date:
August 28, 2020
Export Citation:
Assignee:
ZHEJIANG WINDEY CO LTD (CN)
International Classes:
F03D7/00
Domestic Patent References:
| WO2019138105A1 | 2019-07-18 |
Foreign References:
| CN111502912A | 2020-08-07 | |||
| CN105179184A | 2015-12-23 | |||
| CN105179168A | 2015-12-23 | |||
| CN108590956A | 2018-09-28 | |||
| CN103742359A | 2014-04-23 | |||
| CN202010273840A | 2020-04-09 | |||
| CN104405581A | 2015-03-11 |
Attorney, Agent or Firm:
UNITALEN ATTORNEYS AT LAW (CN)
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