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Wind power plant active power control method considering fatigue load of wind driven generators

A technology for wind power generators and fatigue loads, which is applied to wind power generation, electrical components, circuit devices, etc., and can solve problems such as negative effects of power generation costs and limited practicability

Pending Publication Date: 2021-01-22
WUHAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing methods require complex adjustments to the wind turbine controller, which is limited in practicability, and does not consider that drastic torque changes may increase the fatigue load intensity of the wind turbine, but instead have a negative effect on reducing power generation costs

Method used

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  • Wind power plant active power control method considering fatigue load of wind driven generators
  • Wind power plant active power control method considering fatigue load of wind driven generators
  • Wind power plant active power control method considering fatigue load of wind driven generators

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Embodiment

[0079] The present invention uses a wind farm composed of 25 wind generators distributed in a rectangle to carry out simulation verification of the method, such as Figure 4 shown. The distance between the wind turbines is 7 rotor diameters. The wind turbine model uses a 5MW NERL wind turbine model.

[0080] In order to analyze the fatigue load of the wind turbine under different working conditions, the total fatigue load of the wind turbine under different turbulence intensities is calculated, as shown in Figure 5.

[0081] It can be seen that when the turbulence intensity T i When T is low, the total fatigue load of the wind turbine located in the high wind speed area is small, and with T i increases with the increase. As wind speed and power reference values ​​increase, the fatigue load on the drive shaft increases in the region where the wind turbine torque controller is responsible for regulating power, while in the region where the wind turbine pitch controller domin...

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Abstract

The invention relates to a wind power plant active power control method considering fatigue load of wind driven generators. The wind power plant active power control method comprises the steps of: 1,neglecting the quick dynamic changes of a generators and a variable pitch device, considering the fatigue load of the wind driven generators, and carrying out the modeling of the wind driven generators, wind speed and turbulence intensity; 2, researching a control method of the wind driven generators; 3, respectively evaluating the equivalent damage load of a transmission pump and a tower of eachwind driven generator by adopting turbulence intensity, average wind speed and active power instructions; 4, establishing an active control method considering the fatigue load of the wind driven generators; 5, performing optimization control on active power distribution of each wind driven generator in a wind power plant by adopting an improved particle swarm optimization algorithm; and 6, carrying out simulation verification of the wind power plant active power control method by using the wind power plant formed by 25 wind power generators in rectangular distribution. The wind power plant active power control method does not need to carry out complex modification on an existing wind driven generator controller, is good in control effect, and has high practical value for wind power plant dispatching control.

Description

technical field [0001] The invention belongs to the technical field of power system planning, and in particular relates to a wind farm active power control method considering the fatigue load of a wind power generator. Background technique [0002] With the depletion of traditional fossil energy and the aggravation of environmental pollution and global warming, energy issues have become a severe challenge to the economic and social development of countries all over the world. Wind energy is a kind of renewable energy with large reserves, relatively mature technical conditions and low development cost. As a clean and environmentally friendly flexible power generation method, distributed power generation represented by wind power has become the focus of governments, industries and academia around the world. The rapid increase in demand for wind power generation has put forward higher requirements for the single-unit capacity of wind turbines, which has also prompted a sharp i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/48H02J3/38H02J3/00
CPCH02J3/48H02J3/38H02J3/008H02J2203/20H02J2300/28Y02E10/76
Inventor 赵洁马宇辉贾陈伊洋刘琦方宇迪何育钦麻高源
Owner WUHAN UNIV
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