Mechanistic modeling of different types of surge tanks and draft tubes for hydropower plants

Pandey, Madhusudhan; Lie, Bernt

doi:10.3384/ecp20176131

Cited by 2 publications

(6 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The expressions for all the variables are given in the sequel. A general idea regarding mathematical formulations of these variables is taken from [9]. The total mass inside the surge tank is expressed as…”

Section: Mechanistic Model Of Acstmentioning

confidence: 99%

“…Similarly, F D,a is the frictional force formulated for air flow inside the surge tank based on Darcy's friction factor for air, f D,a . Both f D,w and f D,a are calculated as in [9]. The general expression for Darcy's friction factor f D is based on Reynolds' number N Re = ρ|v|D µ and expressed as…”

Section: Case H ≤ H Tmentioning

confidence: 99%

“…For the region 2100 ≤ N Re ≤ 2300, f D is calculated from a cubic interpolation, with the coefficients a, b, c, and d, differentiable at the boundaries. The final expression for F f is calculated as in [9] given as…”

Section: Case H ≤ H Tmentioning

confidence: 99%

“…In this regard, it is of interest to study the hydraulic behavior of an ACST (closed surge tank) with respect to open surge tanks. A simple mechanistic model of an ACST was developed and studied previously in [9] as a feature extension to an open-source hydro power library-OpenHPL. OpenHPL is based on an equation-based language-Modelica.…”

Section: Introduction 1backgroundmentioning

confidence: 99%

“…OpenHPL is under development at the University of South-Eastern Norway. This paper primarily focuses on the model improvements from [9], validation of the improved model with experimental data from [10], and hydraulic behavior of an ACST in relation to flexible hydro power plants.…”

Section: Introduction 1backgroundmentioning

confidence: 99%

See 4 more Smart Citations

Mechanistic Model of an Air Cushion Surge Tank for Hydro Power Plants

et al. 2022

View full text Add to dashboard Cite

Due to the increasing use of renewable energy sources, and to counter the effects of fossil fuels, renewable dispatchable hydro power can be used for balancing load and generation from intermittent sources (solar and wind). During higher percentage change in load acceptance or rejection in the intermittent grid, the operations of surge tanks are crucial in terms of water mass oscillation and water hammer pressure, and to avoid wear and tear in actuators and other equipment, such as hydro turbines. Surge tanks are broadly classified as open types, with access to open air, and closed types, with a closed volume of pressurized air. Closed surge tanks are considered to have a more flexible operation in terms of suppressing water mass oscillation and water hammer pressure. In this paper, a mechanistic model of an air cushion surge tank (ACST) for hydro power plants is developed based on the ordinary differential equations (ODEs) for mass and momentum balances. The developed mechanistic model of the ACST is a feature extension to an existing open-source hydro power library—OpenHPL. The developed model is validated with experimental data from the Torpa hydro power plant (HPP) in Norway. Results show that the air friction inside the ACST is negligible as compared to the water friction. The results also indicate that a hydro power plant with an ACST is a potential candidate as a flexible hydro power in an interconnected power system grid supplied with intermittent energy sources. Conclusions are drawn based on the simulation results from hydraulic performance of the ACST.

show abstract

Section: Mechanistic Model Of Acstmentioning

confidence: 99%

Section: Case H ≤ H Tmentioning

confidence: 99%

Section: Case H ≤ H Tmentioning

confidence: 99%

Section: Introduction 1backgroundmentioning

confidence: 99%

Section: Introduction 1backgroundmentioning

confidence: 99%

See 3 more Smart Citations

Mechanistic Model of an Air Cushion Surge Tank for Hydro Power Plants

et al. 2022

View full text Add to dashboard Cite

show abstract

Models for a hydropower plant: a review

Nepal,

Bista,

Øyvang

et al. 2023

Linköping Electronic Conference Proceedings

View full text Add to dashboard Cite

Hydro Power plant (HPP), being one of the most convenient options for power generation, has been modelled considering very wide aspects of their application. A model is simply a mathematical representation of a system and it may serve different purposes like dynamic simulation of hydro power, energy systems modelling involving policy making, condition monitoring, etc. The purpose of modelling HPPs may lead to various kind of models for a single Hydropower. This paper aims at reviewing hydropower models developed using different methods along with the purpose for modelling them. This will provide brief insights about state of the art on hydropower modelling and its emerging techniques. Furthermore, this paper presents in more detail about tracking the advancements in dynamic models for classical and variable speed hydropower plants highlighting the need for the development of more accurate models. The work mainly involves narrative review of published works on hydro power modelling techniques. Also, it includes systematic reviews about dynamic representation of hydropower plants. As this paper aims at presentation of hydro power models in a classified manner based on purpose of modelling, the areas of improvement in each type of model have been discussed. Models for control can be made to be more accurate by including more realistic featured like penstock dynamics, uncertainties, etc which further help in design of advanced control systems. There are several potential benefits of HPP modelling, such as optimizing plant performance, improving control, reducing maintenance costs, and enhancing overall system efficiency and reliability.

show abstract

Mechanistic modeling of different types of surge tanks and draft tubes for hydropower plants

Cited by 2 publications

References 7 publications

Mechanistic Model of an Air Cushion Surge Tank for Hydro Power Plants

Mechanistic Model of an Air Cushion Surge Tank for Hydro Power Plants

Models for a hydropower plant: a review

Contact Info

Product

Resources

About