Multi-mode control protection method and device for transmission chain of wind turbine generator

Abstract

The invention discloses a multi-mode control protection method and device for a transmission chain of a wind turbine generator. The method comprises the steps: S1, obtaining operation data of a target wind turbine generator, and recognizing the designated frequencies of the transmission chain according to the operation data, and taking the designated frequencies as key monitoring frequencies; and S2, controlling the target wind turbine generator to operate according to a plurality of preset control modes, monitoring the state of the transmission chain in the operation process of the target wind turbine generator, judging whether a specified operation index exceeds a normal range at the key monitoring frequency or not, and if yes, carrying out control to switch in the multiple preset control modes so as to adjust the corresponding operation index. The device comprises a frequency identification module and a multi-mode control module. The multi-mode control protection method and device have the advantages of being simple in implementation method, low in cost, capable of achieving multi-mode automatic control protection of the transmission chain of the wind turbine generator, high in protection control precision, good in protection performance, high in response speed and the like.

Description

technical field [0001] The invention relates to the technical field of wind power generation equipment protection, in particular to a multi-mode control and protection method and device for a transmission chain of a wind power generating set. Background technique [0002] The transmission chain is the foundation of the wind power generation unit. The transmission chain of the motor unit mainly includes several key components such as blades, hubs, main shafts, gearboxes, generators, etc., which bear the main load of the unit. If there is a problem with the components on the transmission chain, it will Seriously affect the power generation performance and reliability of the unit. At present, the following two methods are mainly used for the protection of the transmission chain of wind turbines: [0003] 1. The way of configuring the protection device: this kind of method is to realize the protection by configuring the corresponding protection device in the transmission chain,...

AI Technical Summary

Problems solved by technology

The above-mentioned method of protection and control directly based on a certain operating index has low actual protection accuracy, and it is difficult to perform protection in a timely and accurate manner when the transmission chain is abnormal, and fluctuations in operating indicators such as speed may be caused by abnormal transmission chains, or may It is caused by other reasons. When the operation index fluctuates only due to reasons that will not cause the operation risk of the wind turbine, it is not necessary to perform shutdown operations. Therefore, there will actually be a large number of unnecessary shutdown protections in the above protection methods, and may even cause Frequent shutdowns affect the stable operation of wind turbines

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