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Integration Method of Pumped-storage Unit Vibration Signal for Online Monitoring System
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Fei ZHANG1, Ting-ting LIANG2, Gang CHEN3, Xue-yang ZENG3
Water Resources and Power | 2023, 41(10) : 212 - 215
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Water Resources and Power | 2023, 41(10): 212-215
• ELECTROMECHANICS AND CONTROL ENGINEERING •
Integration Method of Pumped-storage Unit Vibration Signal for Online Monitoring System
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Fei ZHANG1, Ting-ting LIANG2, Gang CHEN3, Xue-yang ZENG3
Affiliations
  • 1.Pumped Storage Technological & Economic Research Institute of State Grid Xinyuan Company Ltd., Beijing 100761, China
  • 2.Department of Technology and Information, State Grid Xinyuan Company Ltd., Beijing 100052, China
  • 3.State Grid Sichuan Electric Power Research Institute, Chengdu 610041, China
Published: 2023-10-25 doi: 10.20040/j.cnki.1000-7709.2023.20222636
Outline
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In the condition monitoring of pumped storage units, vibration velocity signal is often integrated into the displacement signal, and then calculate characteristic values for unit evaluation. Taking the horizontal vibration velocity signal of upper bracket of a case unit under stable working condition as an example, the method of integrating velocity signal into displacement signal and the setting of filter parameters are studied. Furthermore, vibration signal in transient working condition is adopted for verification. The results indicate that a high-pass filter shall be used when the vibration velocity signal is integrated into the displacement signal under stable conditions, and the cut-off frequency of the high-pass filter can be set as per 0.2 times of the rotational frequency. Under transient conditions, there is a risk of over estimating unit vibration when using unfiltered displacement signals integrated from velocity signals to calculate characteristic values for unit safety assessment.

vibration signal  /  integration method  /  high-pass filter  /  cut-off frequency
Fei ZHANG, Ting-ting LIANG, Gang CHEN, Xue-yang ZENG. Integration Method of Pumped-storage Unit Vibration Signal for Online Monitoring System[J]. Water Resources and Power, 2023 , 41 (10) : 212 -215 . DOI: 10.20040/j.cnki.1000-7709.2023.20222636
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Article Info
doi: 10.20040/j.cnki.1000-7709.2023.20222636
  • Receive Date：2022-12-26
  • Online Date：2026-01-28
  • Published：2023-10-25
Article Data
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History
  • Received：2022-12-26
  • Revised：2023-01-13
Funding
Affiliations
    1.Pumped Storage Technological & Economic Research Institute of State Grid Xinyuan Company Ltd., Beijing 100761, China
    2.Department of Technology and Information, State Grid Xinyuan Company Ltd., Beijing 100052, China
    3.State Grid Sichuan Electric Power Research Institute, Chengdu 610041, China
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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
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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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