Wind farm load long-term evaluation method

A wind farm and load technology, applied in the evaluation field, can solve problems not involved in wind farm load evaluation, etc., and achieve the effects of reducing time and equipment costs, high evaluation efficiency, and high cost performance

Pending Publication Date: 2017-06-09
CHINA ELECTRIC POWER RES INST +3
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Problems solved by technology

[0005] The patents with application numbers 201210436487.9 and 201010513594.8 are both wind turbine load test systems, which do not involve the content of wind farm load evaluation

Method used

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  • Wind farm load long-term evaluation method
  • Wind farm load long-term evaluation method
  • Wind farm load long-term evaluation method

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Embodiment Construction

[0043] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0044] Such as figure 1 As shown, a long-term assessment method of wind farm load, the method includes:

[0045] (1) Select a typical wind turbine; in step (1), the conditions for a typical wind turbine are: select one wind turbine for each model of the wind farm, and if there are multiple models in the wind farm, select multiple typical wind turbines.

[0046] (2) Carry out load tests on typical wind turbines and calculate equivalent loads;

[0047] The calculation of equivalent load in step (2) includes the following steps:

[0048] 2-1 Install strain gauges on a typical wind turbine to measure the load of the wind turbine; define the sampling rate as 50Hz and the average period as 10min; among them,

[0049] The measured load parameters include blade root bending moment (torque), main shaft torque, main shaft bendi...

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Abstract

The invention relates to a wind farm load long-term evaluation method comprising the following steps: selecting a typical wind turbine unit; testing the load of the typical wind turbine unit, and calculating the equivalent load; acquiring SCADA data synchronized with measured data of the typical wind turbine unit, and classifying the data according to the operation status of the typical wind turbine unit; based on the theory and method of an artificial neural network, building a model based on the SCADA data and the load test result; and applying the load model of the typical wind turbine unit to other wind turbine units in a wind farm, and calculating the load of a wind turbine unit to be evaluated based on the SCADA data. The method is very suitable for monitoring the load of a running wind farm (especially an offshore wind farm) for a long time. The fatigue accumulation of all the wind turbine units in a wind farm can be evaluated. The cost and time needed for unit-by-unit test are reduced greatly while the accuracy of load evaluation is ensured.

Description

technical field [0001] The invention relates to an evaluation method, in particular to a long-term evaluation method of wind farm load. Background technique [0002] In recent years, my country's wind power has developed rapidly. In the ten years from 2005 to 2015, the national wind power installed capacity has grown rapidly from 1.25GW to 124.71GW, ranking first in the world. Wind turbines are power generation equipment that need to run for 20 years. This explosive growth has brought huge challenges to the long-term safe and stable operation of wind turbines. The load of wind turbines is a parameter directly related to safety. Most of the safety accidents of wind turbines in recent years are caused by load overloading. Therefore, long-term monitoring of the load of wind turbines can effectively avoid accidents and ensure the safety of wind turbines. safety. [0003] The current actual situation is that wind turbines are only used for load type tests on prototypes during t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q50/06
CPCG06Q50/06Y02B10/30
Inventor 薛扬马晓晶王瑞明付德义边伟陈晨李松迪
Owner CHINA ELECTRIC POWER RES INST
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