汽輪發(fā)電機(jī)組軸系扭振測量與故障識(shí)別.pdf

1、華北電力大學(xué)（北京）碩士學(xué)位論文汽輪發(fā)電機(jī)組軸系扭振測量與故障識(shí)別姓名：王闖申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：熱能工程指導(dǎo)教師：顧煜炯20080201華北電力大學(xué)碩士學(xué)位論文摘要鑒于大型汽輪發(fā)電機(jī)組在運(yùn)行中多次發(fā)生軸系扭振事故，本文根據(jù)汽輪發(fā)電機(jī)組轉(zhuǎn)軸的特點(diǎn)，開發(fā)了汽輪發(fā)電機(jī)組軸系扭振測量系統(tǒng)。提出了一種提高精度的扭振測量方法，該方法在前端信號(hào)處理部分引入峰值時(shí)序檢測與跟蹤濾波技術(shù)，提高了抗干擾能力；實(shí)驗(yàn)結(jié)果表明，該測量方法可以實(shí)現(xiàn)復(fù)雜環(huán)境下軸系

2、扭振的較高精度測量。本文還介紹了扭振測量中信號(hào)預(yù)處理的方法，并在此基礎(chǔ)上詳細(xì)分析了電網(wǎng)短路、誤并列、電力系統(tǒng)振蕩、失磁異步運(yùn)行及機(jī)組甩負(fù)荷等誘發(fā)扭振故障的原因的辨識(shí)方法。模擬了幾種電氣故障，并進(jìn)行了故障辯識(shí)。關(guān)鍵詞：扭振跟蹤濾波峰值時(shí)序檢測信號(hào)處理故障識(shí)別ABSTRACTInviewoftorsionalvibrationoccuredfrequentlyonlargeturbinegeneratorshafts，thethesisde

3、velopsthetorsionalvibrationmeasurementsystemofturbinegenetatorshafts。accordingtotheshafts’ScharacteristiesandprovidesamethodwhichCallimprovesthemeasuringaccuracyoftorsionalvibration，Themethodimprovesanti—interferencecapa

4、citybyintroducingpeaksequencedetectionandtracefilteringatpartofprecedingsignalprocessingExperimentresultsshowthatthemcthodcanbeusedtealizehighprecisemeasurementoftorsionalvibrationincomplicatedconditionincomplicatedcondi

5、tionThethesisalsostudiesthemethodofsignalprocessingintorsionalvibrationmeasurement，Inthisfoundationitstudiessomemethodoffaultdetectintorsionalvibrationsuchaselectricpowernetworkshortcircuit、faultysynchronization、powersys

6、temoscillation、lossofexcitationasynchronousandloadrejectionAtthelastthethesissimulatesseveralkindsofelectricalfaultsandhasdetectedthemWangChuang(Thermalpowerengineering)DirectedbyprofGuYuJiongKEYWORDS：torsionalvibration，