Speed control of run-of-river variable speed hydro plants

Fraile-Ardanuy, Jesús; Wilhelmi, J.R.; Fraile-Mora, J.; Pérez, Juan Ignacio Asensio; Sarasua, I.

doi:10.24084/repqj04.279

Cited by 7 publications

(2 citation statements)

References 2 publications

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“…The drawback of this solution is that it neglects the influence of the generator and PEC on the total efficiency and the optimal operating curve. A similar approach was presented in [43], where the hill diagram was used to calculate the optimal operating curve. However, in this application, the optimal speed points were obtained from a neural network, which calculated the speed based on the flow and guide vane angle.…”

Section: Based On the Hill Diagrammentioning

confidence: 99%

Small Hydropower Plants with Variable Speed Operation—An Optimal Operation Curve Determination

Borkowski

Majdak

2020

Energies

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In recent times, much attention has been paid to small hydropower plants (SHPs) with variable speed operation and different control techniques. Control complexity in SHPs is mainly caused by specific steady-state features of the water turbine, the long time constants of the hydraulic system and significant seasonal and/or aging-related deterioration in the system performance. This paper presents the most important features of the turbine model from a control point of view. It classifies control techniques for SHPs with variable speed operation in terms of the turbine type and SHP function (run-of-the-river and reservoir). Furthermore, various control methods are analysed taking into account the complexity of the method, dynamics, adaptability and applicability. The novelty of this study is the proposal of a simple, universal analytical formula, which, based on the basic dimensions of the turbine, determines the optimal operating curve. The proposed formula is verified on a real SHP 150 kW by comparison with measurements in the form of operational characteristics. The analysis of the annual energy production confirms the effectiveness of the approximation precision, yielding only 1% production losses, and shows an advantage of variable speed over constant speed in annual energy production of 16%.

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Section: Based On the Hill Diagrammentioning

confidence: 99%

Small Hydropower Plants with Variable Speed Operation—An Optimal Operation Curve Determination

Borkowski

Majdak

2020

Energies

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show abstract

“…1 [1]. Since the time response of electromechanical system are much faster than hydraulic system [4], the speed variations caused due to changes in turbine flow have not been considered in this model. Thus speed may be assumed to remain constant at its synchronous value and associated speed regulation problem is not modeled in this paper.…”

Section: Model Descriptionmentioning

confidence: 99%