Mutative-peak-index-based wind generating set abnormal condition early warning method

Abstract

The invention discloses a mutative-peak-index-based wind generating set abnormal condition early warning method. The method comprises the following steps of: analyzing and estimating the influence of wind generating set abnormal conditions caused by specific external excitation of an overland indirect driven wind generating set such as gust, turbulence and the like on a transmission system; and analyzing and estimating the influence of abnormal conditions of the wind generating set such as start, synchronization, yawing, shutdown, low-voltage traversing and the like on the transmission system. According to the method, a mutative peak index is raised for continuous monitoring of the wind generating set, and a proper early warning or alarm threshold value is determined. The method has the advantages of managing the abnormality of the transmission system caused by the abnormal operating state of the wind generating set, determining key overhauled parts and providing a guiding principle for arrangement and regulation of an overhauling plan.

Description

technical field [0001] The invention relates to the field of abnormal state detection of wind power generators, in particular to a method for early warning of abnormal states of wind power generators based on a sudden peak index. Background technique [0002] my country's wind power has developed rapidly. Since 2005, China's total installed capacity of wind power has doubled for five consecutive years. In 2010, China's wind power continued its rapid development momentum. The total installed capacity increased by about 62% compared with 2009, surpassing the United States for the first time. ranks first in the world. Wind turbines have the advantages of low carbon, high precision, and high flexibility, but they are highly automated, expensive, and complex in structure. The operating environment is harsh and the nacelle is high above the ground. Once the wind turbine, especially the transmission system, fails or is damaged, it will cause huge economic losses, and may even cause...

AI Technical Summary

Problems solved by technology

[0003] The vibrations involved in the current structural and mechanical vibration standards are all generated by the machine itself and directly act on the machine parts, which is to evaluate the normal state of machine operation; the impact of external excitation and abnormal state on the machine is not taken into account

The unique variable speed operation mode of wind turbines, inherent external working conditions, complex and harsh working environment, long-term operation accompanied by cut-in, cut-out, shutdown, yaw, low voltage ride-through, turbulence, gusts and other abnormal events , which makes the current structural and mechanical vibration assessment methods unsuitable for abnormal state assessment of wind turbines

The frequent occurrence of these abnormal events is a huge test for the reliable operation of the wind turbine transmission system. Frequent gust shocks and low voltage ride-through have incalculable consequences for the flexible support of the wind turbine transmission system.

Due to the characteristics of random, changeable and mutual coupling of abnormal states, flexible support of the transmission system of wind turbines, frequent abnormal events of wind turbines make it difficult to evaluate the reliability of the transmission system

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