本文選題：600MW汽輪機(jī)組 + 振動(dòng)故障機(jī)理分析��； 參考：《華北電力大學(xué)》2015年碩士論文

【摘要】：為了滿足生活及生產(chǎn)用電量急劇增加的需求,人們需要不斷地對(duì)汽輪發(fā)電機(jī)組容量進(jìn)行改造及研制；但是,隨著機(jī)組容量的不斷增大,對(duì)于材料及運(yùn)行環(huán)境的要求也會(huì)相應(yīng)地提高,特別是在國(guó)家實(shí)行了“上大壓小”政策之后,我國(guó)的主力發(fā)電機(jī)組的容量也進(jìn)入了600MW時(shí)代,而接踵而來(lái)的問(wèn)題便是細(xì)微的機(jī)組振動(dòng)故障卻帶來(lái)廣泛的影響,因此對(duì)其進(jìn)行600MW汽輪機(jī)組的振動(dòng)故障診斷就變得更加重要。本文針對(duì)600MW汽輪機(jī)組的振動(dòng),闡述了目前600MW汽輪機(jī)振動(dòng)診斷的過(guò)程,和最新的研究現(xiàn)狀。對(duì)于汽輪機(jī)振動(dòng)的故障進(jìn)行機(jī)理分析并且根據(jù)現(xiàn)場(chǎng)的實(shí)際運(yùn)行狀況進(jìn)行解讀。對(duì)于振動(dòng)故障的特征提取分析,應(yīng)用目前較為常用的時(shí)域分析、頻域分析、時(shí)頻域分析分別進(jìn)行分析處理,研究針對(duì)與600MW大型汽輪機(jī)振動(dòng)的特征提取方法,故障診斷方面采取的是目前研究較為熱門的支持向量機(jī)的分類診斷方法,并應(yīng)用交叉驗(yàn)證和網(wǎng)格搜素、粒子群優(yōu)化算法、遺傳算法對(duì)支持向量機(jī)進(jìn)行參數(shù)尋優(yōu)。最終根據(jù)自己的所掌握汽輪機(jī)機(jī)組的振動(dòng)知識(shí),選取對(duì)企業(yè)最為有益的汽輪機(jī)振動(dòng)故障診斷系統(tǒng)。
[Abstract]:In order to meet the demand of increasing power consumption in daily life and production, people need to transform and develop the capacity of turbine-generator set constantly, but with the increasing of capacity of turbine generator, The requirements for materials and operating environment will also be raised accordingly, especially after the implementation of the policy of "high pressure and small pressure", the capacity of the main generating units in our country has also entered the 600MW era. However, the following problems are caused by minor vibration faults, so it is more important to diagnose the vibration faults of 600MW steam turbines. Aiming at the vibration of 600MW steam turbine, this paper expounds the process of vibration diagnosis of 600MW steam turbine at present, and the latest research status. The mechanism of turbine vibration fault is analyzed and interpreted according to the actual operation condition. For the feature extraction analysis of vibration fault, this paper applies the time domain analysis, frequency domain analysis and time frequency domain analysis to analyze and deal with the vibration characteristics of 600MW large steam turbine. In the aspect of fault diagnosis, a popular classification and diagnosis method of support vector machine (SVM) is adopted, and the parameters of SVM are optimized by cross-validation, mesh search, particle swarm optimization and genetic algorithm. Finally, according to the knowledge of turbine unit vibration, the most beneficial fault diagnosis system of steam turbine is selected.
【學(xué)位授予單位】：華北電力大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TM621

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本文編號(hào)：2058353