同步发电机定子绕组匝间短路故障特征规律研究
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摘要
为真实有效地反映实际并网运行的大型同步发电机发生定子绕组匝间短路故障时发电机定子电流及谐波电磁转矩等主要电气量的变化规律,采用场-路-网耦合时步有限元法对该问题进行了详细分析。以一台1 407 MVA核电半速汽轮发电机为研究对象建立了场-路-网联合仿真模型,在发电机并网带额定负载稳定运行条件下,对发电机定子绕组不同位置发生相同程度匝间短路故障进行了仿真,研究了大型发电机定子绕组匝间短路时故障位置对发电机机端三相电流、暂态基波电磁转矩、暂态二次谐波电磁转矩及稳态二次谐波电磁转矩的影响。为大型同步发电机定子绕组匝间短路故障诊断提供参考。
In order to truly and effectively reflect the stator current and harmonic electromagnetic torque variation laws of grid connected synchronous generator with stator winding inter-turn short circuit fault,the field-circuit-network coupling finite element method was adopted to analyze this problem in detail. Taking a 1 407 MVA nuclear power half speed turbine generator as an example,the model of field-circuit-network coupling was established,when the grid-connected generator runs at rated load and stable state. Then,the stator winding inter-turn short circuit fault of generator was simulated in same fault degree and different fault position. The influences of generator stator winding inter-turn short circuit fault position on threephase current,transient fundamental electromagnetic torque,transient two harmonic electromagnetic torque and steady state two harmonic electromagnetic torque of generator were studied. The stator winding interturn short circuit fault diagnosis in big synchronous generator is provided by the research.
In order to truly and effectively reflect the stator current and harmonic electromagnetic torque variation laws of grid connected synchronous generator with stator winding inter-turn short circuit fault,the field-circuit-network coupling finite element method was adopted to analyze this problem in detail. Taking a 1 407 MVA nuclear power half speed turbine generator as an example,the model of field-circuit-network coupling was established,when the grid-connected generator runs at rated load and stable state. Then,the stator winding inter-turn short circuit fault of generator was simulated in same fault degree and different fault position. The influences of generator stator winding inter-turn short circuit fault position on threephase current,transient fundamental electromagnetic torque,transient two harmonic electromagnetic torque and steady state two harmonic electromagnetic torque of generator were studied. The stator winding interturn short circuit fault diagnosis in big synchronous generator is provided by the research.
引文
[1]孙宇光.同步发电机定子绕组内部故障的暂态仿真和保护分析[D].北京:清华大学,2003.
[2] PRASAD B J C,SANKER R B V. Inter-turn fault analysis of syn-chronous generator using finite element method(FEM)[J]. Inter-national Journal of Recent Technology and Engineering,2013,2(5):150.
[3] GANDHI A,CORRIGAN T,PARSA L. Recent advances in model-ing and online detection of stator interturn faults in electrical mo-tors[J]. IEEE Transactions on Industrial Electronics,2011,58(5):1564.
[4] REICHMEIDER P P,QUERREY D,GROSS C A,et al. Partitio-ning of synchronous machine windings for internal fault analysis[J]. IEEE Transactions on Energy Conversion,2000,15(4):372.
[5]唐贵基,何玉灵,万书亭,等.气隙静态偏心与定子短路复合故障对发电机定子振动特性的影响[J].振动工程学报,2014,27(1):118.TANG Guiji,HE Yuling,WAN Shuting,et al. Effect of static ec-centricity&stator short circuit composite faults on stator vibrationcharacteristics of generator[J]. Journal of Vibration Engineering,2014,27(1):118.
[6] Megahed A I,Malik O P. Synchronous generator internal fault com-putation and experimental verification[J]. IEEE Proceedings-Gen-eration Transmission and Distribution,1998,145(5):604.
[7]何玉灵,王发林,唐贵基,等.考虑气隙偏心时发电机定子匝间短路位置对电磁转矩波动特性的影响[J].电工技术学报,2017,32(7):11.HE Yuling,WANG Falin,TANG Guiji,et al. Effect of stator inter-Turn short circuit position on electromagnetic torque of generatorwith consideration of air-gap eccentricity[J]. Transactions of ChinaElectrotechnical Society,2017,32(7):11.
[8]赵洪森,戈宝军,陶大军,等.定子绕组匝间短路对发电机电磁转矩特性的影响[J].电工技术学报,2016,31(5):192.ZHAO Hongsen,GE Baojun,TAO Dajun,et al. Influence of statorwinding inter turn short circuit fault on generator electromagnetictorque characteristics[J]. Transactions of China ElectrotechnicalSociety,2016,31(5):192.
[9]万书亭,李和明,许兆风,等.定子绕组匝间短路对发电机定转子径向振动特性的影响[J].中国电机工程学报,2004,24(4):157.WAN Shuting,LI Heming,XU Zhaofeng,et al. Analysis of genera-tor vibration characteristic on stator winding inter-turn short circuitfault[J]. Proceedings of the CSEE,2004,24(4):157.
[10]方红伟,夏长亮,修杰.定子绕组匝间短路时发电机电磁转矩分析[J].中国电机工程学报,2007,27(15):83.FANG Hongwei,XIA Changliang,XIU Jie. Analysis of generatorelectro-magnetic torque on armature winding inter-turn short cir-cuit fault[J]. Proceedings of the CSEE,2007,27(15):83.
[11] SARIKHANI A,MOHAMMED O A. Inter-turn fault detection inPM synchronous machines by physics-based back electromotiveforce estimation[J]. IEEE Transactions on Industrial Electronics,2013,60(8):3472.
[12]孙宇光,余锡文,魏锟,等.发电机绕组匝间故障检测的新型探测线圈[J].中国电机工程学报,2014,34(6):917.SUN Yuguang,YU Xiwen,WEI Kun,et al. A new type of searchcoil for detecting inter-turn faults in synchronous machines[J].Proceedings of the CSEE,2014,34(6):917.
[13]张征平,任震,杨楚明,等.基于小波变换的高压电动机定子绕组匝间短路故障在线检测新方法[J].电力自动化设备,2004,24(3):5.ZHANG Zhengping,REN Zhen,YANG Chuming,et al. Detectionof HV motor stator winding inter-turn fault based on wavelet trans-form[J]. Electiic Power Automation Equipment,2004,24(3):5.
[14]戈宝军,肖士勇,吕艳玲,等.水轮发电机定子绕组内部故障暂态电流研究[J].电机与控制学报,2014,18(3):40.GE Baojun,XIAO Shiyong,LYanling,et al. Transient currentstudy of hydro-generator stator winding internal fault[J]. ElectricMachines and Control,2014,18(3):40.
[15]方红伟,夏长亮,李国平.同步发电机定子绕组匝间短路下电磁转矩和振动分析[J].天津大学学报,2009,42(4):322.FANG Hongwei,XIA Changliang,LI Guoping. Analysis of syn-chronous generator electro-magnetic torque and vibration with ar-mature winding fault[J]. Journal of Tianjin University,2009,42(4):322.
[16] HE Yuling,KE Mengqiang,WANG Faling,et al. Effect of staticeccentricity and stator inter-turn short circuit composite fault onrotor vibration characteristics of generator[J]. Transactions of theCanadian Society for Mechanical Engineering,2015,39(4):767.
[17] HE Yuling,TANG Guiji,WAN Shuting. Effect of the static air-gap eccentricity&stator inter-turn short circuit composite fault onthe generator circulating current characteristics[J]. InternationalReview of Electrical Engineering,2012,7(5):5442.
[18]叶志军,游佰强,J. Rosendahl,等.基于FLUX 2D的大型同步发电机在额定运行下定子绕组匝间短路故障特性研究[J].中国电机工程学报,2013,33(3):125.YE Zhijun,YOU Baiqiang,ROSENDAHL J,et al. Fault charac-teristic study based on FLUX 2D for large synchronous generatorswith inter-turn short circuit of stator windings under rated operat-ing condition[J]. Proceedings of the CSEE,2013,33(3):125.
[19]夏长亮,金雪峰,方红伟,等.基于R/S分析和小波变换的同步发电机定子绕组匝间短路故障分析[J].电工技术学报.2006,21(6):101.XIA Changliang,JIN Xuefeng,FANG Hongwei,et al. Fault analy-sis of internal stator windings in synchronous generators based onR/S and wavelet transform[J]. Transactions of China Electro-technical Society,2006,21(6):101.
[20]胡敏强,黄学良.电机运行性能数值计算方法及其应用[M].南京:东南大学出版社,2003:173-179.
[21]胡笳,罗应力,刘晓芳,等.汽轮发电机时步有限元计算参数对大扰动仿真结果的影响[J].中国电机工程学报,2009,29(27):59.HU Jia,LUO Yingli,LIU Xiaofang,et al. Influence of calculationparameters of time-stepping finite element method on simulationresults in turbo-generators large disturbance process[J]. Proceed-ings of the CSEE,2009,29(27):59.
[2] PRASAD B J C,SANKER R B V. Inter-turn fault analysis of syn-chronous generator using finite element method(FEM)[J]. Inter-national Journal of Recent Technology and Engineering,2013,2(5):150.
[3] GANDHI A,CORRIGAN T,PARSA L. Recent advances in model-ing and online detection of stator interturn faults in electrical mo-tors[J]. IEEE Transactions on Industrial Electronics,2011,58(5):1564.
[4] REICHMEIDER P P,QUERREY D,GROSS C A,et al. Partitio-ning of synchronous machine windings for internal fault analysis[J]. IEEE Transactions on Energy Conversion,2000,15(4):372.
[5]唐贵基,何玉灵,万书亭,等.气隙静态偏心与定子短路复合故障对发电机定子振动特性的影响[J].振动工程学报,2014,27(1):118.TANG Guiji,HE Yuling,WAN Shuting,et al. Effect of static ec-centricity&stator short circuit composite faults on stator vibrationcharacteristics of generator[J]. Journal of Vibration Engineering,2014,27(1):118.
[6] Megahed A I,Malik O P. Synchronous generator internal fault com-putation and experimental verification[J]. IEEE Proceedings-Gen-eration Transmission and Distribution,1998,145(5):604.
[7]何玉灵,王发林,唐贵基,等.考虑气隙偏心时发电机定子匝间短路位置对电磁转矩波动特性的影响[J].电工技术学报,2017,32(7):11.HE Yuling,WANG Falin,TANG Guiji,et al. Effect of stator inter-Turn short circuit position on electromagnetic torque of generatorwith consideration of air-gap eccentricity[J]. Transactions of ChinaElectrotechnical Society,2017,32(7):11.
[8]赵洪森,戈宝军,陶大军,等.定子绕组匝间短路对发电机电磁转矩特性的影响[J].电工技术学报,2016,31(5):192.ZHAO Hongsen,GE Baojun,TAO Dajun,et al. Influence of statorwinding inter turn short circuit fault on generator electromagnetictorque characteristics[J]. Transactions of China ElectrotechnicalSociety,2016,31(5):192.
[9]万书亭,李和明,许兆风,等.定子绕组匝间短路对发电机定转子径向振动特性的影响[J].中国电机工程学报,2004,24(4):157.WAN Shuting,LI Heming,XU Zhaofeng,et al. Analysis of genera-tor vibration characteristic on stator winding inter-turn short circuitfault[J]. Proceedings of the CSEE,2004,24(4):157.
[10]方红伟,夏长亮,修杰.定子绕组匝间短路时发电机电磁转矩分析[J].中国电机工程学报,2007,27(15):83.FANG Hongwei,XIA Changliang,XIU Jie. Analysis of generatorelectro-magnetic torque on armature winding inter-turn short cir-cuit fault[J]. Proceedings of the CSEE,2007,27(15):83.
[11] SARIKHANI A,MOHAMMED O A. Inter-turn fault detection inPM synchronous machines by physics-based back electromotiveforce estimation[J]. IEEE Transactions on Industrial Electronics,2013,60(8):3472.
[12]孙宇光,余锡文,魏锟,等.发电机绕组匝间故障检测的新型探测线圈[J].中国电机工程学报,2014,34(6):917.SUN Yuguang,YU Xiwen,WEI Kun,et al. A new type of searchcoil for detecting inter-turn faults in synchronous machines[J].Proceedings of the CSEE,2014,34(6):917.
[13]张征平,任震,杨楚明,等.基于小波变换的高压电动机定子绕组匝间短路故障在线检测新方法[J].电力自动化设备,2004,24(3):5.ZHANG Zhengping,REN Zhen,YANG Chuming,et al. Detectionof HV motor stator winding inter-turn fault based on wavelet trans-form[J]. Electiic Power Automation Equipment,2004,24(3):5.
[14]戈宝军,肖士勇,吕艳玲,等.水轮发电机定子绕组内部故障暂态电流研究[J].电机与控制学报,2014,18(3):40.GE Baojun,XIAO Shiyong,LYanling,et al. Transient currentstudy of hydro-generator stator winding internal fault[J]. ElectricMachines and Control,2014,18(3):40.
[15]方红伟,夏长亮,李国平.同步发电机定子绕组匝间短路下电磁转矩和振动分析[J].天津大学学报,2009,42(4):322.FANG Hongwei,XIA Changliang,LI Guoping. Analysis of syn-chronous generator electro-magnetic torque and vibration with ar-mature winding fault[J]. Journal of Tianjin University,2009,42(4):322.
[16] HE Yuling,KE Mengqiang,WANG Faling,et al. Effect of staticeccentricity and stator inter-turn short circuit composite fault onrotor vibration characteristics of generator[J]. Transactions of theCanadian Society for Mechanical Engineering,2015,39(4):767.
[17] HE Yuling,TANG Guiji,WAN Shuting. Effect of the static air-gap eccentricity&stator inter-turn short circuit composite fault onthe generator circulating current characteristics[J]. InternationalReview of Electrical Engineering,2012,7(5):5442.
[18]叶志军,游佰强,J. Rosendahl,等.基于FLUX 2D的大型同步发电机在额定运行下定子绕组匝间短路故障特性研究[J].中国电机工程学报,2013,33(3):125.YE Zhijun,YOU Baiqiang,ROSENDAHL J,et al. Fault charac-teristic study based on FLUX 2D for large synchronous generatorswith inter-turn short circuit of stator windings under rated operat-ing condition[J]. Proceedings of the CSEE,2013,33(3):125.
[19]夏长亮,金雪峰,方红伟,等.基于R/S分析和小波变换的同步发电机定子绕组匝间短路故障分析[J].电工技术学报.2006,21(6):101.XIA Changliang,JIN Xuefeng,FANG Hongwei,et al. Fault analy-sis of internal stator windings in synchronous generators based onR/S and wavelet transform[J]. Transactions of China Electro-technical Society,2006,21(6):101.
[20]胡敏强,黄学良.电机运行性能数值计算方法及其应用[M].南京:东南大学出版社,2003:173-179.
[21]胡笳,罗应力,刘晓芳,等.汽轮发电机时步有限元计算参数对大扰动仿真结果的影响[J].中国电机工程学报,2009,29(27):59.HU Jia,LUO Yingli,LIU Xiaofang,et al. Influence of calculationparameters of time-stepping finite element method on simulationresults in turbo-generators large disturbance process[J]. Proceed-ings of the CSEE,2009,29(27):59.
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