Modelling and benefits of combined operation of hydropower unit and battery energy storage system on grid primary frequency control

Mäkinen, Tomi; Leinonen, Aki; Ovaskainen, Markus

doi:10.1109/eeeic/icpseurope49358.2020.9160666

Cited by 11 publications

(5 citation statements)

References 15 publications

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“…However, little research was done on the combined regulation of pumped storage and battery energy storage. In Makinen et al, 13 a hydropower‐battery integrated model in the simulation of grid frequency control was established. In Javed et al, 14 a pumped and battery storage hybrid system was proposed, and the battery is the auxiliary energy storage, and pumped storage is the main energy storage, and the performance indicators mainly based on the economy were analyzed.…”

Section: Introductionmentioning

confidence: 99%

Modeling and coordinated control for active power regulation of pumped storage‐battery integrated system under small‐disturbances

Wang

Yang

Liao

et al. 2023

Energy Science & Engineering

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Multienergy complementation is an important means to improve the capacity of renewable energy consumption and the key to achieving the goal of "net zero" globally. The hydro-wind-photovoltaic-storage hybrid system is an important technical approach, and in this system, pumped storage and battery energy storage are both key components for regulation. To study the problem of coordinated control of the two storage systems, a model of a pumped storage-battery integrated system (PSBIS) for simulating small disturbances of pumped storage units and the battery charge and discharge characteristics was established by MATLAB/Simulink in this study firstly. Then, two control strategies ("priority regulation of pumped storage" and "priority regulation of battery storage") are studied, and simulation calculations under ideal input and measured wind power disturbances are carried out to compare two control strategies by using the integrated system model under grid-connected conditions. The simulation results revealed that the "priority regulation of pumped storage" control strategy has a better performance on active power balance, compared with the "priority regulation of battery storage" control strategy. This work could provide technical support for coordinated control of the practical PSBIS in the future.

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Section: Introductionmentioning

confidence: 99%

Modeling and coordinated control for active power regulation of pumped storage‐battery integrated system under small‐disturbances

Wang

Yang

Liao

et al. 2023

Energy Science & Engineering

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“…To reduce this wear and tear in the regulating systems, the hybridization of hydraulic turbines has recently been proposed [7,8]. It is based on installing a battery in parallel with the unit which is in charge of infecting or subtracting power from the grid to provide FCR.…”

Section: Introductionmentioning

confidence: 99%

Hybridization in Kaplan turbines. Wear and tear assessment

Valentín

Presas

Egusquiza

et al. 2022

IOP Conf. Ser.: Earth Environ. Sci.

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In the current energy market, hydraulic turbines are increasingly demanded to work in Frequency containment reserve (FCR) mode to compensate the constant frequency fluctuations in the electrical grid. To do so, hydraulic turbines change their generating power continuously which implies to regulate the flow rate. Kaplan turbines are double regulated machines that change the position of both guide vanes and runner blades to regulate the flow rate maximizing their efficiency. Therefore, guide vanes and runner blades are continuously moving when they provide FCR, leading to high wear and tear of the regulation system components. Within the frame of the European project XFLEX Hydro, a new technology to reduce the wear and tear of the regulation system in FRC have been implemented. This technology consists in the hybridization of the unit with a battery system. In that way, the battery is the one in charge of providing part of the power fluctuations to the grid, reducing the movements of guide vanes and runner blades of the turbine. The battery system was successfully installed in August 2021 in one unit of the Vogelgrun powerplant, in France. Since that moment, the unit has been working in hybrid mode. A monitoring system was installed in the power plant in two different units, the one hybridized and another without hybrid system. Several sensors were installed and different parameters were measured simultaneously to calculate the wear and tear of the different components. In this paper, a comparison between the hybrid mode and the standard mode (non-hybrid) is performed in terms of mileage and wear and tear of the guide vanes and runner blades servomotors.

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“…Regarding hydropower plants, additional flexibility can be achieved by increasing the height of dams or the use of future proglacial lakes [4][5][6], developing and increasing the pumped storage capacities [7,8], adding frequency converters [9], developing battery hybridization [10,11], implementing a hydraulic short circuit [12], or by using new storage capacities [13,14]. The last solution can increase the flexibility of small run-of-river power plants without too high environmental and economic costs.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Operational Flexibility of a Small Run-of-River Hydropower Plant

Decaix

Gaspoz

Hasmatuchi

et al. 2021

Water

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Over the last two decades, the public policies for promoting new renewable energies allowed the growth of such energies around the world. Due to their success, the policies are changing, forcing the producers to adapt their strategy. For instance, in Switzerland, the feed-in tariff system has been modified in 2018 to promote an electricity production from renewable energies that matches the demand. For small hydraulic power plants owners, such a change requires to increase the flexibility of their fleet. The SmallFLEX project, led by HES-SO Valais, aims at demonstrating on the pilot site of Gletsch-Oberwald owned by Forces Motrices Valaisannes SA, the possibilities to increase the flexibility of the power plant and to provide new services. The paper focuses on the methodology followed to warranty the use of the settling basin, the forebay tank, and the third upper part of the headrace tunnel as a new smart storage volume. By combining laboratory tests, numerical simulations, and on-site measurements, the new range of operating conditions has been defined. These data can be used to foresee economic gains. The methodology and the outputs of the project can be useful for performing such a study on other power plants.

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Modelling and benefits of combined operation of hydropower unit and battery energy storage system on grid primary frequency control

Cited by 11 publications

References 15 publications

Modeling and coordinated control for active power regulation of pumped storage‐battery integrated system under small‐disturbances

Modeling and coordinated control for active power regulation of pumped storage‐battery integrated system under small‐disturbances

Hybridization in Kaplan turbines. Wear and tear assessment

Enhanced Operational Flexibility of a Small Run-of-River Hydropower Plant

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