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Method for establishing wind turbine output simulation model

A simulation model, wind turbine technology, applied in the direction of electrical digital data processing, special data processing applications, instruments, etc., can solve the problems of variability in atmospheric motion states, complex and unstable intermittent flow fields, etc., to avoid improper layout and improve Utilization rate and effect of improving output efficiency

Pending Publication Date: 2019-11-29
COLD & ARID REGIONS ENVIRONMENTAL & ENG RES INST CHINESE
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Problems solved by technology

And because of the variability, intermittency and complex instability of the flow field in the atmospheric motion state, it is difficult to use simple measurement methods to effectively understand the effect and influence of the flow field on the wind turbine in the actual wind farm

Method used

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  • Method for establishing wind turbine output simulation model
  • Method for establishing wind turbine output simulation model
  • Method for establishing wind turbine output simulation model

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0077] Single wind turbine parameter setting:

[0078] Fan diameter d 80.0m; hub height z h is 70.0m; wind turbine hub height horizontal inflow wind speed Uo is 12.5 m / s;

[0079] The inflow upstream of the fan satisfies the logarithmic wind profile;

[0080] The simulated space area is: x is 0~20d; y is -2d~2d; z is 0~2d.

[0081] Simulation results:

[0082] 1) Wake simulation in the vertical direction:

[0083] image 3 It shows the wind field characteristics of the wind turbine wake on the x-z section. It can be seen that within 4d downstream of the wind turbine, the wake phenomenon of the wind turbine is particularly significant. There is a low wind speed area at the height of the hub. In the area, the wind speed at the height of the hub is greatly compensated, and at 12d, it can basically reach 95% of the inflow wind speed at the corresponding height.

[0084] Table 1 shows the horizontal wind speed at the height of the hub at different positions downstream of ...

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Abstract

The invention relates to a method for establishing a wind turbine output simulation model. The method comprises the following steps: (1) determining wind turbine parameters: wind turbine diameter, hubheight, air density and inflow wind speed; (2) determining modeling conditions; (3) establishing an equation of wind turbine tail flow wind speed according to the principles of mass conservation andmomentum conservation; and (4) establishing a model: substituting the inflow wind speed Uo into the wind speed logarithm profile, and expressing the wake flow model of the wind turbine as a function in a three-dimensional orthogonal frame O (x, y, z). By determining the wake flow distribution condition of the wind turbines, the method solves the optimal layout distance between the upstream wind turbines and the downstream wind turbines, and can be effectively improve the land utilization efficiency and the downstream wind power plant power generation efficiency.

Description

technical field [0001] The invention relates to the technical field of wind power, in particular to a method for establishing a wind generator output simulation model. Background technique [0002] In the development of wind energy resources and the design of wind farms, it is necessary to clarify the output status of wind turbines. Therefore, it is very important to accurately simulate the output performance of the wind turbine. The output of the wind turbine is determined by the characteristics of the wind turbine and the atmospheric flow field. output of wind turbines. And because of the variability and intermittency of the atmospheric motion state and the complex instability of the flow field, it is difficult to use simple measurement methods to effectively understand the effect and influence of the flow field on the wind turbine in an actual wind farm. However, in the wind farm construction evaluation and wind farm output forecasting system, it is necessary to estimat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
Inventor 高晓清陈伯龙杨丽薇李振朝惠小英余晔
Owner COLD & ARID REGIONS ENVIRONMENTAL & ENG RES INST CHINESE
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