Experimental and numerical investigation on head losses of a complex throttled surge tank for refined hydropower plant simulation

2022 ◽  
Author(s):  
Weichao Ma ◽  
Wenjie Yan ◽  
Jiebin Yang ◽  
Xianghui He ◽  
Jiandong Yang ◽  
...  
Keyword(s):  
Numerical Investigation ◽  
Hydropower Plant ◽  
Surge Tank ◽  
Head Losses ◽  
Plant Simulation

scholarly journals ANALISIS HEAD LOSSES PADA PENSTOCK UNIT III DI PERUM JASA TIRTA II UNIT JASA PEMBANGKIT PLTA IR. H. DJUANDA

Power Plant ◽  
2018 ◽  
Vol 6 (1) ◽  
pp. 19-25
Author(s):  
Redaksi Tim Jurnal
Keyword(s):  
Energy Production ◽  
Power Plants ◽  
High Reliability ◽  
Hydropower Plant ◽  
Working Fluid ◽  
Temperature Changes ◽  
Head Losses ◽  
Total Head ◽  
Labor System ◽  
Load Center

One of the power plants in the labor system is hydropower, which is a power plant by utilizing water resources as its working fluid. In the operation of the hydropower requires high reliability sothat the energy production contuinitas to the load center or to the power system network can be more optimum. One of the components in the hydropower plant is penstock. Closed pipeline, whether it is laminar or turbulent, must have head losses. Head losses on penstock is a phenomenon of losses on the penstock so as to make the head value on the hydropower becomes reduced. At Penstock unit III PLTA Ir. H. Djuanda there are two phenomenon of head losses, namely: head losses major caused by friction penstock against water and minor head losses in the form of bend 900 with radius 4.375 m and 11.3 m from the axis penstock. Temperature changes affect the size of head losses, but they do not significantly affect penstock efficiency. At a temperature of 240C and a flow rate of 5m / s obtained a total head losses of 0606 m so as to make the potential of turbine inlet power down to 31,247 MW or 99.21%.

An active perceivable device–oriented modeling framework for hydropower plant simulation

Energy ◽  
2018 ◽  
Vol 165 ◽  
pp. 1009-1023 ◽  
Author(s):  
Binqiao Zhang ◽  
Xiaohui Yuan ◽  
Yanbin Yuan ◽  
Xu Wang
Keyword(s):  
Hydropower Plant ◽  
Modeling Framework ◽  
Plant Simulation

Coordinated Hydropower Plant Simulation for Multireservoir Systems

2014 ◽  
Vol 140 (2) ◽  
pp. 216-227 ◽  
Author(s):  
Jesus M. Latorre ◽  
Santiago Cerisola ◽  
Andres Ramos ◽  
Alejandro Perea ◽  
Rafael Bellido
Keyword(s):  
Hydropower Plant ◽  
Plant Simulation

The Application of Safety Membranes in Hydropower Plant

2014 ◽  
Vol 607 ◽  
pp. 449-453
Author(s):  
Sheng Chen ◽  
Jian Zhang ◽  
Xiao Dong Yu
Keyword(s):  
Hydropower Plant ◽  
Mechanical Device ◽  
Surge Tank ◽  
Small Hydropower ◽  
Membrane Rupture ◽  
Rupture Pressure ◽  
Hydropower Stations ◽  
The Mathematical Model ◽  
Rupture Behavior

Safety membrane is a good mechanical device that can be applied in middle and small hydropower stations instead of a surge tank. This present study deals with the determination of three most important parameters of safety membrane, rupture pressure, diameter, and number. The mathematical model of transient process is established by introducing the method of characteristic, which is used for the simulation of the rupture behavior of safety membrane. Then the model is applied to a specific hydropower station that only can employ safety membrane as the regulating measurement, and it shows good performance. The achievements of the study can serve as a reference for similar projects.

scholarly journals HEAD LOSSES IN SMALL HYDROPOWER PLANT TRASH RACKS (SHP)

2016 ◽  
Vol 15 (4) ◽  
pp. 369-382 ◽  
Author(s):  
Natalia Walczak ◽  
◽  
Zbigniew Walczak ◽  
Mateusz Hämmerling ◽  
Marcin Spychała ◽  
...  
Keyword(s):  
Hydropower Plant ◽  
Small Hydropower ◽  
Head Losses

scholarly journals Frequency Containment Control of Hydropower Plants Using Different Adaptive Methods

Energies ◽  
2021 ◽  
Vol 14 (8) ◽  
pp. 2082
Author(s):  
Doğan Gezer ◽  
Yiğit Taşcıoğlu ◽  
Kutay Çelebioğlu
Keyword(s):  
Adaptive Control ◽  
Power Plants ◽  
Lyapunov Method ◽  
Renewable Energy Sources ◽  
Real Life ◽  
Hydropower Plant ◽  
Massachusetts Institute Of Technology ◽  
Surge Tank ◽  
Containment Control ◽  
Hydropower Plants

With the growth in the share of variable renewable energy sources, fluctuations in the power generation caused by these types of power plants can diminish the stability and flexibility of the grid. These two can be enhanced by applying frequency containment using hydropower plants as an operational reserve. The frequency containment in hydropower plants is automatically controlled by speed governors within seconds. Disturbances such as fluctuations in the net head and aging may diminish the performance of the controllers of the speed governors. In this study, model reference adaptive control approaches based on the Massachusetts Institute of Technology (MIT) rule and Lyapunov method were exploited in order to improve the performance of the speed governor for frequency containment control. The active power control with frequency control was enhanced by the aforementioned adaptive control methods. A mathematical model of a hydropower plant with a surge tank and medium penstock was constructed and validated through site measurements of a plant. It was shown that, as they are applicable in real life, both methods perform significantly better compared to conventional proportional-integrator control. Even in first five deviations, the performance of the conventional controller improved by 58.8% using the MIT rule and by 65.9% using the Lyapunov method. When the two adaptive control approaches were compared with each other, the MIT rule outputted better results than the Lyapunov method when the disturbance frequency was higher; however, the latter was more functional for rare disturbances.

scholarly journals Head Losses of Horizontal Bar Racks as Fish Guidance Structures

Water ◽  
2020 ◽  
Vol 12 (2) ◽  
pp. 475 ◽  
Author(s):  
Julian Meister ◽  
Helge Fuchs ◽  
Claudia Beck ◽  
Ismail Albayrak ◽  
Robert M. Boes
Keyword(s):  
Flow Field ◽  
Fish Passage ◽  
Head Loss ◽  
Hydraulic Performance ◽  
Velocity Fields ◽  
Hydropower Plant ◽  
Protection Measures ◽  
Head Losses ◽  
Hydropower Plants ◽  
Fish Protection

Horizontal bar racks have been used as trash racks at hydropower plants since the 1920s. With the installation of the first horizontal bar rack bypass system at a hydropower plant as a downstream fish passage facility in 2006, these racks rapidly gained importance as fish protection measures. Since then, they have been installed at more than 100 small- to medium-sized hydropower plants in Europe. Despite the large number of installed racks, systematic investigations of the head losses and velocity fields were missing. On the basis of detailed hydraulic experimentation with a large number of rack parameters and including up-to-date foil-shaped bars, the layout of horizontal bar racks and their hydraulic performance were assessed in the current study. This paper reports the results of the rack head loss investigation, whereas the accompanying paper entitled Velocity Fields at Horizontal Bar Racks as Fish Guidance Structures focuses on the up- and downstream velocity fields. By applying foil-shaped bars instead of rectangular bars, the loss coefficient was reduced by more than 40%, depending on the rack configuration. Bottom and top overlays are used to increase the guidance efficiency for fish, sediments, and floating debris. However, the altered flow field results in increased head losses. A new set of equations is proposed to predict head losses for current horizontal bar racks, including overlays for various hydropower plant layouts. The predictions are compared to literature data.

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