| Aging assessment of large generator insulation based on PD measurements |
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| 作者姓名： | YUE Bo CHEN Xiaolin CHENG Yonghong XIE Hengkun |
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| 作者单位： | 1. State Key Laboratory of Electrical Insulation and Power Equipment, Xi'an Jiaotong University, Xi'an 710049, China; 2. Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, China; 3. Department of Electrical Engineering, Tsinghua University, Beijing 100084, China |
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| 基金项目： | 中国科学院资助项目，中国博士后科学基金，国家重点实验室基金 |
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| 摘 要： | The statistical parameters of phase resolved partial discharge (PD) distribution and ultra-wideband (UWB) characteristics of PD pulse are proposed for aging assessment of large generator insulation. Multi-stress aging tests of the model generator stator bar specimens were performed and PD measurements were conducted using both digital PD detector with frequency ranging from 40 kHz to 400 kHz and UWB PD detector with bandwidth from 10 MHz to 3 GHz at different aging stages. The test results show that the skewness and UWB frequency characteristics of PD can be taken as the characterization parameters for aging assessment of generator insulation. Furthermore, the measurement results of real generator stator bars show that these methods based on statistical parameters and UWB characteristics of PD are prospective for aging assessment and residual lifetime estimation of large generator stator insulation.
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| 关 键 词： | partial discharge stator insulation multi-stress accelerated aging statistical parameters ultra-wideband aging assessment. |
Aging assessment of large generator insulation based on PD measurements |
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| YUE Bo,CHEN Xiaolin,CHENG Yonghong,XIE Hengkun.Aging assessment of large generator insulation based on PD measurements[J].Progress in Natural Science,2005,15(11):1035-1043. |
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| Authors: | YUE Bo CHEN Xiaolin CHENG Yonghong XIE Hengkun |
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| Institution: | 1. State Key Laboratory of Electrical Insulation and Power Equipment, Xi'an Jiaotong University, Xi'an 710049, China;Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, China;Department of Electrical Engineering, Tsinghua University,Beijing 100084,China
2. State Key Laboratory of Electrical Insulation and Power Equipment, Xi'an Jiaotong University, Xi'an 710049, China |
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| Abstract: | The statistical parameters of phase resolved partial discharge (PD) distribution and ultra-wideband (UWB) characteristics of PD pulse are proposed for aging assessment of large generator insulation. Multi-stress aging tests of the model generator stator bar specimens were performed and PD measurements were conducted using both digital PD detector with frequency ranging from 40 kHz to 400 kHz and UWB PD detector with bandwidth from 10 MHz to 3 GHz at different aging stages. The test results show that the skewness and UWB frequency characteristics of PD can be taken as the characterization parameters for aging assessment of generator insulation. Furthermore, the measurement results of real generator stator bars show that these methods based on statistical parameters and UWB characteristics of PD are prospective for aging assessment and residual lifetime estimation of large generator stator insulation. |
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| Keywords: | partial discharge stator insulation multi-stress accelerated aging statistical parameters ultra-wideband aging assessment |
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