Suzhou Electric Appliance Research Institute
期刊號(hào): CN32-1800/TM| ISSN1007-3175

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密封油內(nèi)滲導(dǎo)致的轉(zhuǎn)子匝間絕緣劣化診斷

來(lái)源:電工電氣發(fā)布時(shí)間:2024-02-01 08:01瀏覽次數(shù):217

密封油內(nèi)滲導(dǎo)致的轉(zhuǎn)子匝間絕緣劣化診斷

馮宇哲1,潘建偉2,王新3,楊立川1
(1 國(guó)網(wǎng)浙江省電力有限公司電力科學(xué)研究院,浙江 杭州 310014;
2 浙江浙能臺(tái)州第二發(fā)電有限責(zé)任公司,浙江 臺(tái)州 318016;
3 浙江浙能技術(shù)研究院有限公司,浙江 杭州 311121)
 
    摘 要:密封油內(nèi)滲導(dǎo)致轉(zhuǎn)子匝間絕緣劣化,是轉(zhuǎn)子匝間短路故障的主要原因之一。某臺(tái) 1 050 MW 汽輪發(fā)電機(jī)在運(yùn)行狀態(tài)和極間電壓試驗(yàn)均無(wú)異常的情況下,通過(guò)分析重復(fù)脈沖試驗(yàn)結(jié)果,判斷轉(zhuǎn)子繞組已存在由密封油內(nèi)滲導(dǎo)致的轉(zhuǎn)子匝間絕緣劣化問(wèn)題;拔出轉(zhuǎn)子護(hù)環(huán),發(fā)現(xiàn)轉(zhuǎn)子端部繞組區(qū)域存在大量密封油內(nèi)滲現(xiàn)象,同時(shí)轉(zhuǎn)子匝間絕緣未發(fā)生金屬性短路;對(duì)匝間絕緣劣化的機(jī)理進(jìn)行了闡述并給出了檢修策略,以避免類似問(wèn)題的再次發(fā)生。
    關(guān)鍵詞: 發(fā)電機(jī);轉(zhuǎn)子繞組;密封油內(nèi)滲;匝間絕緣劣化
    中圖分類號(hào):TM311     文獻(xiàn)標(biāo)識(shí)碼:B     文章編號(hào):1007-3175(2024)01-0055-04
 
Diagnosis of Rotor Interturn Insulation Deterioration
Caused by Seal Oil Infiltration
 
FENG Yu -zhe1, PAN Jian-wei2, WANG Xin3, YANG Li-chuan1
(1 State Grid Zhejiang Electric Power Co., Ltd. Electric Power Research Institute, Hangzhou 310014, China;
2 Zhejiang Zheneng Taizhou Second Electric Power Generation Co., Ltd, Taizhou 318016, China;
3 Zhejiang Zheneng Technology Research Institute Co., Ltd, Hangzhou 311121, China)
 
    Abstract: The sealing oil internal leakage leads to the degradation of generator rotor inter-turn insulation, which is one of the main reasons for rotor inter-turn short circuit faults. In this paper, a 1 050 MW steam turbine generator is taken as an example, and there is no abnormality in its operating state and interpolar voltage test, it was judged that the rotor winding had multi-point inter-turn insulation deterioration caused by sealing oil infiltration by analyzing the results of repeated pulse tests. When the rotor retainer ring was pulled out, it found that there was a large amount of sealing oil infiltration in the winding area at the end of the rotor, and there was no metallic short circuit in the insulation between the rotor turns; the mechanism of inter turn insulation degradation was explained and maintenance strategies were provided to avoid similar problems from happening again.
    Key words: generator; rotor winding; seal oil infiltration; interturn insulation deterioration
 
參考文獻(xiàn)
[1] 牟春華,居文平,黃嘉駟,等. 火電機(jī)組靈活性運(yùn)行技術(shù)綜述與展望[J]. 熱力發(fā)電,2018,47(5) :1-7.
[2] 薛信春.600 MW 發(fā)電機(jī)轉(zhuǎn)子匝間短路的分析與處理[J]. 華東電力,2001,29(8) :28-29.
[3] 馮宇哲,羅統(tǒng)領(lǐng),金泱,等. 一起 RSO 檢測(cè)無(wú)效的大型隱極同步電機(jī)轉(zhuǎn)子動(dòng)態(tài)匝間短路故障檢測(cè)與處理[J]. 大電機(jī)技術(shù),2023(2) :30-34.
[4] 郗常驥. 汽輪發(fā)電機(jī)故障實(shí)例與分析[M]. 北京:中國(guó)電力出版社,2002.
[5] 關(guān)建軍. 大型汽輪發(fā)電機(jī)轉(zhuǎn)子繞組匝間短路故障的診斷研究[J]. 大電機(jī)技術(shù),2003(2) :18-22.
[6] 馮宇哲,李衛(wèi)軍,楊立川.660 MW 發(fā)電機(jī)轉(zhuǎn)子繞組匝間短路故障檢測(cè)與處理[J]. 電工電氣,2023(7) :46-50.
[7] 李永剛,李和明,趙華. 汽輪發(fā)電機(jī)轉(zhuǎn)子繞組匝間短路故障診斷新判據(jù)[J] . 中國(guó)電機(jī)工程學(xué)報(bào),2003,23(6) :112-116.
[8] 李曉明,劉東明. 大型汽輪發(fā)電機(jī)轉(zhuǎn)子繞組匝間短路故障的測(cè)試與分析[J]. 大電機(jī)技術(shù),2003(3) :7-11.
[9] 凌霜寒,黃立軍,米賢才,等. 基于重復(fù)脈沖法的轉(zhuǎn)子繞組匝間短路故障診斷[J] . 浙江電力,2016,35(8) :42-45.
[10] ALBRIGHT D R.Interturn Short-Circuit Detector for Turbine Generator Rotor Windings[J].IEEE Transactions on Power Apparatus and Systems,1971,PAS-90(2) :478-483.
[11] 中國(guó)電力企業(yè)聯(lián)合會(huì). 隱極同步發(fā)電機(jī)轉(zhuǎn)子匝間短路故障診斷導(dǎo)則:DL/T 1525—2016[S]. 北京:中國(guó)電力出版社,2016 :4-6.
[12] 中國(guó)機(jī)械工業(yè)聯(lián)合會(huì). 隱極式同步發(fā)電機(jī)轉(zhuǎn)子匝間短路測(cè)定方法:JB/T 8446—2013[S]. 北京:機(jī)械工業(yè)出版社,2013 :3-8.
[13] 馮宇哲,孫海軍,柯元豐,等. 發(fā)電機(jī)氫氣純度偏低的治理和典型氫氣提純裝置的應(yīng)用[J] . 電工電氣,2021(7) :39-43.