Impeller unbalance detecting system of double-fed wind power generator

Abstract

An impeller unbalance detecting system of a double-fed wind power generator comprises a data collecting and processing module, a man-machine interface, an alarm processing module and a detecting diagnosis sub system. The data collecting and processing module is used for collecting electric quantity information, digital quantity and position information of an electric generator. The man-machine interface is connected with an upper computer through an Ethernet interface, displays the current, the rotation speed, the characteristic frequency and the amplitude information of the electric generatorin real time, and sets threshold valve parameters. The alarm processing module gives the diagnosis result through the set detected characteristic frequency threshold value and the characteristic amplitude calculated in real time; the detecting diagnosis sub system conducts unbalance diagnosis of the impeller unbalance detecting system by utilizing wavelet transformation, Hibert and FFT processingand model prediction, and outputs the characteristic result to the alarm processing module. The impeller unbalance detecting system can be widely applied to real-time online monitoring of unbalance of an impeller of the double-fed wind power generator, and reports to the police, guarantees are provided for safe and reliable operation of blades, and the impeller unbalance detecting system has wideapplication prospects.

Description

Technical field [0001] The invention belongs to the technical field of on-line fault diagnosis of wind turbines, and relates to a doubly-fed wind turbine impeller unbalance detection system. Background technique [0002] In recent years, the grid-connected capacity of wind turbines has continued to increase, especially the planning of offshore wind turbines has also been put on the agenda. This has put forward higher requirements for the safe and stable operation of the units, reducing downtime and increasing power generation. The unit is one of the main models. Generally, the operating environment of wind turbines is relatively harsh, and the blades may even cause mass imbalance due to wind, sand, icing, etc. Especially in recent years, the increase in unit capacity and the popularization and application of low-speed wind turbines have made the blades longer and longer. The imbalance of the impeller, including the aerodynamic imbalance, is easily transmitted to the transmission...

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the deficiencies of the existing wind turbine blade unbalance detection method, such as high cost, low reliability, and poor adaptability, based on the above problems, the present invention proposes a low-cost, high-reliability, adaptable A better impeller unbalance detection system for doubly-fed generator sets

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