基於疲勞理論之台灣風場風機傳動鏈壽命預測

Abstract

本文針對風機傳動鏈的意外損壞與剩餘壽命進行預測，提供機組維修人員有足夠可信的狀態參考依據，以最大限度避免離線停機成本，使得風機營運流程能更加完善。 本研究輔以數值模型、受力、及疲勞理論計算出軸承與齒輪等齒輪箱部件的剩餘壽命，再參考台灣風場歷史資料粗估在台灣建置風力發電機能使用的年限。本研究的成果可以利用特定的風機模型和傳動鏈規格，搭配台灣風場特性，成功推算出每月和每年齒輪和軸承的疲勞損傷。這種壽命預測方法的優點在於能夠應對不同特性和不同規格的風場和風機，並得出相對可靠的壽命預測依據。 讀者可以使用本研究提出的壽命預測模型進行數值模擬，並精算出任意風速下任意規格傳動鏈的部件動態行為，並進一步計算疲勞損傷；也可以參考仿造本研究的結果歸納方式，將歷史風場與疲勞損傷整理成盒狀圖，並歸納疲勞損傷趨勢，便於未來為機組維修團隊粗估相似風場分布的傳動鏈壽命情況。

This thesis predicts the accidental damage and remaining life of the wind turbine drive chain, and provides a reliable reference basis for unit maintenance personnel to avoid offline shutdown costs to the greatest extent, so that the wind turbine operation process can be more complete. This study is supplemented by numerical models, stresses, and fatigue theory to calculate the remaining life of helical gearbox components such as bearings and gears, and then refer to the historical data of Taiwan's wind farms to roughly estimate the service life of wind turbines built in Taiwan. The results of this study can be used to successfully calculate the monthly and annual fatigue damage scores of gears and bearings using specific wind turbine models and drive chain specifications, combined with the characteristics of the wind field in Taiwan. The advantage of this life prediction method is that it can deal with wind farms and wind turbines with different characteristics and specifications, and obtain relatively reliable life prediction basis. Readers can use the life prediction model proposed in this study to perform numerical simulation, and actuate the component dynamic behavior of any drive chain specification at any wind speed, and calculate fatigue damage. Readers can also imitate this study result, organize the historical wind field and fatigue damage into a box diagram, and summarize the fatigue damage trend to roughly estimate the drive chain life in similar wind field distribution for the unit maintenance personnel.