高压电机介质损耗因数试验的电极结构、原理及与内屏蔽技术的关系分析
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摘要
本文结合实测数据对比分析四种测量电极结构:"低阻断开,测量电极仅包含槽部低阻长"、"测量电极仅包含槽部低阻长,两电极"、"测量电极包至高阻末端,三电极"以及"测量电极仅包含槽部低阻长,保护电极在低阻防晕层末端,电位跟踪";从试验原理角度阐述"西林电桥"、"电流比较仪"、"数字化测量原理设备"整机绕组介质损耗因数试验的差异;研究了介质损耗因数测量结果与导线内屏蔽技术的关系,得出结论:使用内屏蔽技术后介质损耗因数起始值略有增大,但增量显著降低。
Testing methods for dissipation factor of large generator winding are focused in this paper. Testing data of four kinds of measuring electrode structures are compared and analyzed. Principles of Schering bridge, current comparator, and digital measurement are described. The influence of internal corona protection to the test result of dielectric dissipation factor is discussed, and it is found that the initial value is increased slightly, but the increment of dissipation factor decreased obviously.
Testing methods for dissipation factor of large generator winding are focused in this paper. Testing data of four kinds of measuring electrode structures are compared and analyzed. Principles of Schering bridge, current comparator, and digital measurement are described. The influence of internal corona protection to the test result of dielectric dissipation factor is discussed, and it is found that the initial value is increased slightly, but the increment of dissipation factor decreased obviously.
引文
[1]CIGRE A1.17:Guide of methods of determining the condition of stator winding insulation and their effectiveness in large motors[S].
[2]杨烽,刘代军,卞五洲.700MW水轮发电机定子绕组介质损耗测量研究[J].大电机技术,2017(1).
[3]邹祖冰,杜建国,吴仲平.大型水轮发电机定子线棒介质损耗测量探讨[J].大电机技术,2011(1).
[4]IEEE 286-2000,IEEE Recommended Practice for Measurement of Power Factor Tip-up of Electric Machinery Stator Coil Insulation[S].
[5]IEC 60034-27-3-2015,Rotating electrical machines-Part 27-3:Dielectric dissipation factor measurement on stator winding insulation of rotating electrical machines[S].
[6]Partial discharge,dissipation factor,and corona aspects for high voltage electric generator stator bars and windings[J].IEEE transactions on dielectrics and electrical insulation,12(2):347-361.
[7]刘凤娟,刘睿,等.定子线棒内均压结构对槽部电场强度及介质损耗因数的影响[J].绝缘材料,2012,45(4).
[8]JB/T 7608-2006,测量高压交流电机线圈介质损耗角正切试验方法及限值[S].
[9]陈阳,冯超,张影.定子线棒介质损耗因数正接法、反接法测试的比较分析[J].大电机技术,2012(1).
[10]方城君.1100MW发电机定子绕组介质损耗的测定研究[J].上海大中型电机,2012(4).
[11]任东滨,胡波,张小俊,刘伟.22k V级汽轮发电机定子整机介质损耗测试研究[J].大电机技术,2013(3).
[12]潘庆辉.汽轮发电机定子绕组介质损耗角正切测试研究[J].东方电机,2001(4).
[13]胡波,漆临生,刘伟,等.电机线圈绝缘介质损耗及其增量的影响因素与处理工艺[J].东方电机,2002(2).
[14]Akinobu Nakayama,Hohji Haga.Development of generator stator coil with 22k V Global VPI insulation[C]//2004 Annual Report Conference on Electrical Insulation and Dielectric Phenomena.
[15]Chunxiu Hu,Xiaohong Yuan,Xin He and Xiaohong Zhang.Study on the effect of different internal corona protection on electrical properties of generator stator bar[C]//ICPADM,2009,Harbin,China,vol 1.
[2]杨烽,刘代军,卞五洲.700MW水轮发电机定子绕组介质损耗测量研究[J].大电机技术,2017(1).
[3]邹祖冰,杜建国,吴仲平.大型水轮发电机定子线棒介质损耗测量探讨[J].大电机技术,2011(1).
[4]IEEE 286-2000,IEEE Recommended Practice for Measurement of Power Factor Tip-up of Electric Machinery Stator Coil Insulation[S].
[5]IEC 60034-27-3-2015,Rotating electrical machines-Part 27-3:Dielectric dissipation factor measurement on stator winding insulation of rotating electrical machines[S].
[6]Partial discharge,dissipation factor,and corona aspects for high voltage electric generator stator bars and windings[J].IEEE transactions on dielectrics and electrical insulation,12(2):347-361.
[7]刘凤娟,刘睿,等.定子线棒内均压结构对槽部电场强度及介质损耗因数的影响[J].绝缘材料,2012,45(4).
[8]JB/T 7608-2006,测量高压交流电机线圈介质损耗角正切试验方法及限值[S].
[9]陈阳,冯超,张影.定子线棒介质损耗因数正接法、反接法测试的比较分析[J].大电机技术,2012(1).
[10]方城君.1100MW发电机定子绕组介质损耗的测定研究[J].上海大中型电机,2012(4).
[11]任东滨,胡波,张小俊,刘伟.22k V级汽轮发电机定子整机介质损耗测试研究[J].大电机技术,2013(3).
[12]潘庆辉.汽轮发电机定子绕组介质损耗角正切测试研究[J].东方电机,2001(4).
[13]胡波,漆临生,刘伟,等.电机线圈绝缘介质损耗及其增量的影响因素与处理工艺[J].东方电机,2002(2).
[14]Akinobu Nakayama,Hohji Haga.Development of generator stator coil with 22k V Global VPI insulation[C]//2004 Annual Report Conference on Electrical Insulation and Dielectric Phenomena.
[15]Chunxiu Hu,Xiaohong Yuan,Xin He and Xiaohong Zhang.Study on the effect of different internal corona protection on electrical properties of generator stator bar[C]//ICPADM,2009,Harbin,China,vol 1.