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Study on Nonlinear Transient Response Characteristics of Hydropower Station with Super-long Headrace Tunnel Considering Unsteady Friction
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Wen-cheng GUO, Le WANG, Ke-dong SHU
Water Resources and Power | 2025, 43(9) : 187 - 191
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Water Resources and Power | 2025, 43(9): 187-191
Study on Nonlinear Transient Response Characteristics of Hydropower Station with Super-long Headrace Tunnel Considering Unsteady Friction
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Wen-cheng GUO, Le WANG, Ke-dong SHU
Affiliations
  • School of Civil and Hydraulic Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
Published: 2025-09-25 doi: 10.20040/j.cnki.1000-7709.2025.20250587
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Unsteady friction plays a very complex role in the water hammer phenomenon within pipeline systems. For hydropower station with super-long headrace tunnel (SLHT), it is crucial to consider the effects of unsteady friction adequately. This paper conducts a study on the nonlinear transient response characteristics of hydropower station with SLHT based on unsteady friction. Firstly, a system model of hydropower station with SLHT is established using the method of characteristics, incorporating unsteady friction based on instantaneous acceleration. Then, simulations of this model are performed under load and frequency disturbances. Finally, the stability of the model under frequency disturbances is evaluated using the Bode plot method, and the impact of unsteady friction parameters on system stability is investigated in conjunction with the energy equation. The results show that the unsteady friction in the pipeline primarily affects the rapid response phase of the water turbine in the hydropower station with SLHT. When the impact coefficients of local acceleration (kt) and convective acceleration (kl) increase, the system stability deteriorates. Moreover, changes in kt and kl make the system more sensitive to high-frequency disturbances.

hydropower station  /  super-long headrace tunnel  /  unsteady friction  /  hydraulic parameter  /  response characteristics
Wen-cheng GUO, Le WANG, Ke-dong SHU. Study on Nonlinear Transient Response Characteristics of Hydropower Station with Super-long Headrace Tunnel Considering Unsteady Friction[J]. Water Resources and Power, 2025 , 43 (9) : 187 -191 . DOI: 10.20040/j.cnki.1000-7709.2025.20250587
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Article Info
doi: 10.20040/j.cnki.1000-7709.2025.20250587
  • Receive Date：2025-04-01
  • Online Date：2025-12-15
  • Published：2025-09-25
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  • Received：2025-04-01
  • Revised：2025-05-28
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    School of Civil and Hydraulic Engineering, Huazhong University of Science and Technology, Wuhan 430074, 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
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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