A method for real-time monitoring of power output deviation during wind turbine operation

Abstract

The invention discloses a method for monitoring power output deviation in real time during running of wind turbines. The method includes steps of acquiring a linear relational expression among computed wind speeds V<b, cf> of wind measuring towers on the basis of standard air density and computed wind speeds V<b, fj> of the tops of cabins of fans on the basis of the standard air density; computing windward speeds V of the wind turbines according to the linear relational expression; drawing a two-dimensional scatter diagram of electric power P applied during running of the wind turbines and the windward speeds V of the wind turbines, and superimposing a delivery power-wind speed design curve of the wind turbines on the two-dimensional scatter diagram; computing real-time power output deviation S<p, i> between the electric power P of each scatter point during running of the wind turbines and a design value P<s, i> of electric power. The windward speeds V of the wind turbines correspond to the electric power P applied during running of the wind turbines. The method has the advantages that the real-time power output deviation S<p, i> is compared with the specified values of power output deviation, and accordingly excellent running performance of the wind turbines can be determined when the real-time power output deviation S<p, i> is smaller than the specified values of the power output deviation.

Description

【Technical field】 [0001] The invention belongs to the technical field of wind power generation, and in particular relates to a method for real-time monitoring of the power output deviation of a wind turbine during operation. 【Background technique】 [0002] Wind energy is a kind of clean renewable energy. As the main form of wind energy utilization, wind power generation is one of the renewable energy power generation methods with the most mature technology, the most large-scale development conditions and the most commercial development prospects. After the wind turbine is put into operation, whether its output can reach the nominal output of the wind turbine and whether its operation is stable is the most concerned issue of the wind farm operator, and it is also an important factor in determining the economic indicators of the wind farm operation. [0003] The traditional assessment test method is to record the wind speed at the hub height of the wind turbine and the output ...

AI Technical Summary

Problems solved by technology

[0007] 4. Due to the large number of places where wind speed needs to be counted and the long time, etc., the wind speed data has the characteristics of massive volume and difficult storage. Therefore, in many places, only the mean and variance of wind speed per hour are kept, and the actual wind speed data of the year are counted instead of Keep all actual wind speed data

Evaluation models are often distorted due to insufficient data

[0008] 5. There is an influence problem caused by the change of air density with the change of temperature

[0009] From the above analysis, it can be known that these methods currently have certain problems in accuracy, real-time performance and data integrity, which have a certain impact on the monitoring of the actual characteristics of the wind turbine. Acquisition, management, correction, analysis, and formulation of an effective technical solution are the technical breakthroughs in the current calculation and monitoring of fan operating characteristics

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