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Study on gas production law of stator bar with fault for hydrogenerator
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Die HU1, 2, Fan MO1, 2, Jiada WEI1, 2, Kang LI3, Liujie WAN4
Insulating Materials | 2023, 56(11) : 80 - 86
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Insulating Materials | 2023, 56(11): 80-86
• Test and Analysis •
Study on gas production law of stator bar with fault for hydrogenerator
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Die HU1, 2, Fan MO1, 2, Jiada WEI1, 2, Kang LI3, Liujie WAN4
Affiliations
  • 1Wuling Electric Power Co., Ltd., Changsha 410004, China
  • 2Hydropower Industry Innovation Center of State Power Investment Corporation, Changsha 410004, China
  • 3Institute of Electrical Engineering Chinese Academy of Sciences, Beijing 100190, China
  • 4Henan Key Laboratory of Wire and Cable Structures and Materials, School of Cable Engineering, Henan Institute of Technology, Xinxiang 453000, China
Published: 2023-11-20 doi: 10.16790/j.cnki.1009-9239.im.2023.11.013
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The study on the gas production law of stator bar for hydrogenerator under high temperature and partial discharge can provide a basis for insulation ageing monitoring of hydrogenerator on the basis of decomposition gas method. Aiming at the stator bar used in hydropower station, a high temperature pyrolysis experimental platform was built to study the pyrolysis gas of stator bar at 100, 120, 150 and 250℃. A partial discharge experimental platform of stator bar was established to study the ozone generation law of stator bar under partial discharge. The results show that CO and CO2 are suitable used as the early characteristic gases of stator bar with high temperature fault. When there is partial discharge on the stator bar surface, the ozone concentration is related to discharge voltage and time. Under the same discharge condition, the ozone concentration rate generated by semi-conductive silica gel is higher and it has stronger corona resistance. Filling stator slot with semi-conductive silica gel is beneficial to the safe operation and on-line monitoring of stator bar.

stator bar  /  pyrolysis  /  partial discharge  /  decomposition gas method
Die HU, Fan MO, Jiada WEI, Kang LI, Liujie WAN. Study on gas production law of stator bar with fault for hydrogenerator[J]. Insulating Materials, 2023 , 56 (11) : 80 -86 . DOI: 10.16790/j.cnki.1009-9239.im.2023.11.013
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Article Info
doi: 10.16790/j.cnki.1009-9239.im.2023.11.013
  • Receive Date：2022-12-13
  • Online Date：2025-11-24
  • Published：2023-11-20
Article Data
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History
  • Received：2022-12-13
  • Revised：2023-02-02
Funding
Affiliations
    1Wuling Electric Power Co., Ltd., Changsha 410004, China
    2Hydropower Industry Innovation Center of State Power Investment Corporation, Changsha 410004, China
    3Institute of Electrical Engineering Chinese Academy of Sciences, Beijing 100190, China
    4Henan Key Laboratory of Wire and Cable Structures and Materials, School of Cable Engineering, Henan Institute of Technology, Xinxiang 453000, China
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https://castjournals.cast.org.cn/joweb/jycl/EN/10.16790/j.cnki.1009-9239.im.2023.11.013
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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