汽轮发电机定子线棒F级绝缘的寿命评估方法研究
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摘要
为了研究定子线棒主绝缘的寿命评估模型,设计了绝缘在电热联合作用下的加速老化试验,利用平均秩次法和最小二乘法对试验数据进行分析处理,得到双参数威布尔分布模型的参数,并用该模型对绝缘的寿命进行统计分析,获得绝缘在不同电压和温度下的可靠度函数。采用95%的可靠度寿命τ(0.95)作为绝缘的平均使用寿命,基于FALLOU模型进行多元回归分析,从而获得绝缘的寿命评估模型,并通过微观结构分析绝缘的老化机理。结果表明:该模型适用于定子线棒主绝缘的寿命评估,利用该模型可以计算出现场实际给定电压和给定温度下绝缘的使用寿命,为现场制定定子线棒的预防性维修策略提供支持。
In order to study the life evaluation model of stator bar main insulation, accelerated ageing tests under electrical and thermal combined stress were designed for insulation. The test data was analyzed and processed by average rank time method and least square method, and then the parameters of two-parameter Weibull distribution model was obtained. The life of insulation was statistical analyzed by the two-parameter Weibull distribution model, and the reliability function of insulation at different voltages and temperatures was obtained. The insulation life under the reliability of 95% was used as the average service life of insulation, and it was conducted multiple regression analysis based on the FALLOU model, then the insulation lifetime evaluation model was obtained. The ageing mechanism of insulation was analyzed through microstructure. The results show that the model is suitable for life evaluation of the main insulation for stator bar, and it can be used to calculate the service life of insulation under actual given voltage and given temperature, which can provide support for making on-site preventive maintenance strategy of stator bar.
In order to study the life evaluation model of stator bar main insulation, accelerated ageing tests under electrical and thermal combined stress were designed for insulation. The test data was analyzed and processed by average rank time method and least square method, and then the parameters of two-parameter Weibull distribution model was obtained. The life of insulation was statistical analyzed by the two-parameter Weibull distribution model, and the reliability function of insulation at different voltages and temperatures was obtained. The insulation life under the reliability of 95% was used as the average service life of insulation, and it was conducted multiple regression analysis based on the FALLOU model, then the insulation lifetime evaluation model was obtained. The ageing mechanism of insulation was analyzed through microstructure. The results show that the model is suitable for life evaluation of the main insulation for stator bar, and it can be used to calculate the service life of insulation under actual given voltage and given temperature, which can provide support for making on-site preventive maintenance strategy of stator bar.
引文
[1]张征平,王兵,涂小涛,等.温度对汽轮发电机主绝缘频域介电谱特性的影响分析[J].绝缘材料,2016,49(4):55-60.
[2]金英兰.三峡机组发电机绝缘的国产化[J].发电设备,1999(6):39-42.
[3]付强,满宇光,卢春莲,等.大型发电机定子线棒VPI用绝缘材料的国产化应用研究(II)[J].绝缘材料,2015,48(4):1-7.
[4]高波,郝长金,尹小兵,等.温度对发电机主绝缘频域介电响应的影响研究[J].中国电机工程学报,2017,37(3):915-922.
[5]李伟清.汽轮发电机故障检查分析及预防[M].北京:中国电力出版社,2002:5-6.
[6] CASTRO L C, OSLINGER J L, TAYLOR N, et al. Dielectric and physico-chemical properties of epoxy-mica insulation during thermoelectric aging[J]. IEEE Transactions on Dielectrics and Electrical Insulation,2015,22(6):3107-3117.
[7] SRINIVAS M B, RAMU T S. Multifactor aging of HV generator stator insulation including mechanical vibrations[J].IEEE Transactions on Electrical Insulation,1992,27(5):1009-1021.
[8] STONE G C, Condition monitoring and diagnostics of motor and stator windings-A review[J]. IEEE Transactions on Dielectrics and Electrical Insulation,2013,20(6):2073-2080.
[9]乐波,李俭,张亮,等.环氧云母绝缘定子线棒多因子老化过程中交流参量变化规律的研究[J].电网技术,2001,25(3):30-33.
[10]张晓虹,张亮,乐波,等.基于局部放电的矩特征分析大电机主绝缘的老化[J].中国电机工程学报,2002,22(5):94-98.
[11]金神雅树,李雅范.水轮发电机绝缘剩余寿命的推断[J].国外大电机,1998(4):52-56.
[12]后藤和夫,王丽珠.汽轮发电机的预防性维护技术:定子线圈,转子绝缘老化的诊断和剩余寿命[J].国外大电机,1994(2):39-44.
[13]任文娥,刘红文,于钦学,等.发电机定子线圈绝缘诊断与寿命预测[J].高压电器,2012,48(11):7-12.
[14]高波,郝长金,李帅兵,等.发电机环氧云母绝缘频域介电谱特性研究[J].西南交通大学学报,2017,52(1):9-15.
[15]史进渊.大型汽轮发电机定子线圈F级绝缘寿命预测方法的研究[J].动力工程学报,2013,33(7):507-516.
[16]蒋雄伟,贾志东,谢恒堃.绝缘材料老化寿命模型的研究进展[J].高电压技术,2000,26(3):44-46.
[17] MONTANARI G C, MAZZANTI G, SIMONI L. Progress in electrothermal life modeling of electrical insulation during the last decades[J]. IEEE Transactions on Dielectrics and Electrical Insulation,2002,9(5):730-745.
[18]廖瑞金,解兵,杨丽君,等.油纸绝缘电-热联合老化寿命模型的比较与分析[J].电工技术学报,2006,21(2):17-21.
[19]解兵,梁帅伟,杨丽君,等.油纸绝缘电-热老化寿命模型的选择研究[J].高电压技术,2006,32(3):21-23.
[20]石颉,谌登华,施海宁,等.核电站仪控开关可靠性数据分析与处理[J].核动力工程,2010,31(2):54-57.
[21]段林生,韩绍坤.国内几种大型电机定子线圈F级主绝缘可靠性评定情况[J].电气应用,1988(9):49-50.
[22] International Electrotechnical Commission. Rotating electrical machines-Part 1:Rating and performance:IEC60034-1:2010[S]. Geneva:IEC,2010.
[23]隋银德,赫铣,满宇光.二滩水轮发电机绝缘系统的特点[J].大电机技术,2004(3):1-5.
[24]梁智明,漆临生,皮如贵.绝缘电老化试验研究[J].东方电气评论,2001,15(4):212-217.
[2]金英兰.三峡机组发电机绝缘的国产化[J].发电设备,1999(6):39-42.
[3]付强,满宇光,卢春莲,等.大型发电机定子线棒VPI用绝缘材料的国产化应用研究(II)[J].绝缘材料,2015,48(4):1-7.
[4]高波,郝长金,尹小兵,等.温度对发电机主绝缘频域介电响应的影响研究[J].中国电机工程学报,2017,37(3):915-922.
[5]李伟清.汽轮发电机故障检查分析及预防[M].北京:中国电力出版社,2002:5-6.
[6] CASTRO L C, OSLINGER J L, TAYLOR N, et al. Dielectric and physico-chemical properties of epoxy-mica insulation during thermoelectric aging[J]. IEEE Transactions on Dielectrics and Electrical Insulation,2015,22(6):3107-3117.
[7] SRINIVAS M B, RAMU T S. Multifactor aging of HV generator stator insulation including mechanical vibrations[J].IEEE Transactions on Electrical Insulation,1992,27(5):1009-1021.
[8] STONE G C, Condition monitoring and diagnostics of motor and stator windings-A review[J]. IEEE Transactions on Dielectrics and Electrical Insulation,2013,20(6):2073-2080.
[9]乐波,李俭,张亮,等.环氧云母绝缘定子线棒多因子老化过程中交流参量变化规律的研究[J].电网技术,2001,25(3):30-33.
[10]张晓虹,张亮,乐波,等.基于局部放电的矩特征分析大电机主绝缘的老化[J].中国电机工程学报,2002,22(5):94-98.
[11]金神雅树,李雅范.水轮发电机绝缘剩余寿命的推断[J].国外大电机,1998(4):52-56.
[12]后藤和夫,王丽珠.汽轮发电机的预防性维护技术:定子线圈,转子绝缘老化的诊断和剩余寿命[J].国外大电机,1994(2):39-44.
[13]任文娥,刘红文,于钦学,等.发电机定子线圈绝缘诊断与寿命预测[J].高压电器,2012,48(11):7-12.
[14]高波,郝长金,李帅兵,等.发电机环氧云母绝缘频域介电谱特性研究[J].西南交通大学学报,2017,52(1):9-15.
[15]史进渊.大型汽轮发电机定子线圈F级绝缘寿命预测方法的研究[J].动力工程学报,2013,33(7):507-516.
[16]蒋雄伟,贾志东,谢恒堃.绝缘材料老化寿命模型的研究进展[J].高电压技术,2000,26(3):44-46.
[17] MONTANARI G C, MAZZANTI G, SIMONI L. Progress in electrothermal life modeling of electrical insulation during the last decades[J]. IEEE Transactions on Dielectrics and Electrical Insulation,2002,9(5):730-745.
[18]廖瑞金,解兵,杨丽君,等.油纸绝缘电-热联合老化寿命模型的比较与分析[J].电工技术学报,2006,21(2):17-21.
[19]解兵,梁帅伟,杨丽君,等.油纸绝缘电-热老化寿命模型的选择研究[J].高电压技术,2006,32(3):21-23.
[20]石颉,谌登华,施海宁,等.核电站仪控开关可靠性数据分析与处理[J].核动力工程,2010,31(2):54-57.
[21]段林生,韩绍坤.国内几种大型电机定子线圈F级主绝缘可靠性评定情况[J].电气应用,1988(9):49-50.
[22] International Electrotechnical Commission. Rotating electrical machines-Part 1:Rating and performance:IEC60034-1:2010[S]. Geneva:IEC,2010.
[23]隋银德,赫铣,满宇光.二滩水轮发电机绝缘系统的特点[J].大电机技术,2004(3):1-5.
[24]梁智明,漆临生,皮如贵.绝缘电老化试验研究[J].东方电气评论,2001,15(4):212-217.