Classical/Advanced controls for hydraulic power plants

Abstract Cross-flow hydro turbines (CFHTs) are generally used in micro hydraulic power plants due to their simplicity in design and fabrication, moderate efficiency, ease of maintenance. The CFHT can be used in low flow and low head conditions with an efficiency of around 90% at rated conditions. However, the efficiency of the CFHT can further be improved by changing its geometric parameters Hence, in the present investigation, 3D unsteady simulations are performed in order to locate the exit blade angle (β2) with the intention is to improve the efficiency of the turbine. In the proposed investigation, the multi-physics FVM solver ANSYS Fluent has been used with the help of the SST k-ω turbulence model to carry out the unsteady simulations. The 3D unsteady simulations are performed by varying the exit blade angle (β2) from 60° to 90° to improve its efficiency when the rotational speed is fixed with the number of blades being 20. From the unsteady simulations, the maximum efficiency of the CFHT is at the exit blade angle (β2) = 80°.

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Ultrasonic pulse-Doppler flow meter application for hydraulic power plants

Flow Measurement and Instrumentation ◽

10.1016/j.flowmeasinst.2007.06.004 ◽

2008 ◽

Vol 19 (3-4) ◽

pp. 155-162 ◽

Cited By ~ 15

Author(s):

Kenichi Tezuka ◽

Michitsugu Mori ◽

Takeshi Suzuki ◽

Toshimasa Kanamine

Keyword(s):

Power Plants ◽

Ultrasonic Pulse ◽

Flow Meter ◽

Hydraulic Power ◽

Doppler Flow ◽

Pulse Doppler

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State Control for Hydraulic Power Plants

IFAC Proceedings Volumes ◽

10.1016/s1474-6670(17)44755-0 ◽

1995 ◽

Vol 28 (26) ◽

pp. 189-194

Author(s):

Mouncif Lahlou

Keyword(s):

Power Plants ◽

State Control ◽

Hydraulic Power

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The spillway design for the dam’s height over 300 meters

E3S Web of Conferences ◽

10.1051/e3sconf/20184005009 ◽

2018 ◽

Vol 40 ◽

pp. 05009

Author(s):

Weiwei Yao ◽

Yuansheng Chen ◽

Xiaoyi Ma ◽

Xiaobin Li

Keyword(s):

Power Plants ◽

Air Entrainment ◽

High Water ◽

Western Region ◽

Hydraulic Power ◽

River Bank ◽

Common Structure ◽

Water Head ◽

Novel Method ◽

The Western Region

According the current hydropower development plan in China, numbers of hydraulic power plants with height over 300 meters will be built in the western region of China. These hydraulic power plants would be in crucial situation with the problems of high water head, huge discharge and narrow riverbed. Spillway is the most common structure in power plant which is used to drainage and flood release. According to the previous research, the velocity would be reaching to 55 m/s and the discharge can reach to 300 m3/s.m during spillway operation in the dam height over 300 m. The high velocity and discharge in the spillway may have the problems such as atomization nearby, slides on the side slope and river bank, Vibration on the pier, hydraulic jump, cavitation and the negative pressure on the spill way surface. All these problems may cause great disasters for both project and society. This paper proposes a novel method for flood release on high water head spillway which is named Rumei hydropower spillway located in the western region of China. This paper has following components: Determining the type and the layout of the spillway through the perspectives of air entrainment, flow jet angle and water energy dissipation in flushing pond structure. The physical hydraulic model has been used to evaluate spillway design effects.

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