The value of a pumping-hydro generator in a system with increasing integration of wind power

Pinto, João Bruno Barroso; Sousa, Jorge; Neves, Mário Ventim

doi:10.1109/eem.2011.5953028

Cited by 13 publications

(4 citation statements)

References 6 publications

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“…The main income source is the DM, representing 56-80% of the MTI for the 12-4 h PSHP, respectively (Table 4). This result contradicts one of the conclusions of [21] and [22], where it was stated that the SM is the main income source in the operation of PSHPs participating in the DM and the SRS. The main reason of the presented result in comparison to the one published in the literature is that, in this paper, the effect of the reserve schedule in the clearing price of the SM is taken into account (price-maker approach in the SM).…”

Section: Maximum Theoretical Incomecontrasting

confidence: 80%

Deriving Optimal End of Day Storage for Pumped-Storage Power Plants in the Joint Energy and Reserve Day-Ahead Scheduling

2017

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This paper presents a new methodology to maximise the income and derive the optimal end of day storage of closed-loop and daily-cycle pumped-storage hydropower plants. The plants participate in the day-ahead energy market as a price-taker and in the secondary regulation reserve market as a price-maker, in the context of the Iberian electricity system. The real-time use of the committed reserves is considered in the model formulation. The operation of the plants with the proposed methodology is compared to the ones that use an end of day storage of an empty reservoir or half of the storage capacity. Results show that the proposed methodology increases the maximum theoretical income in all the plants analysed both if they only participate in the day-ahead energy market and if they also participate in the secondary regulation service. It is also shown that the increase in the maximum theoretical income strongly depends on the size of the plant. In addition, it is proven that the end of day storages change notably in the new reserve-driven strategies of pumped-storage hydropower plants and that the proposed methodology is even more recommended if the secondary regulation service is considered.

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Section: Maximum Theoretical Incomecontrasting

confidence: 80%

Deriving Optimal End of Day Storage for Pumped-Storage Power Plants in the Joint Energy and Reserve Day-Ahead Scheduling

2017

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“…grid frequency control in both pumping and generating modes of operation. This is essential as the excess of energy produced by non-dispatchable RES can be balanced, while eliminating the need for fossil-fuelbased units [1], [2]. Further efficiency increase through the Fig.…”

Section: Introductionmentioning

confidence: 99%

Highly Flexible Indirect Modular Multilevel Converter for High Power Pumped Hydro Storage Plants

Basic

Schwery

Dujić

2020

IECON 2020 the 46th Annual Conference of the IEEE Industrial Electronics Society

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As fossil-fuel-and nuclear-based generating facilities are being phased-out in favor of intermittent renewable energy sources, the need for large scale, highly flexible balancing storage is imminent. By the generating capacity of readily available units, enormous potential lays in retrofitting of large pumped hydro storage plants to variable speed operation, increasing their flexibility to meet future power system demands. Indirect Modular Multilevel Converter is a highly scalable and inherently redundant topology that meets the power and voltage ratings of large pumped hydro generating units. Variable DC link converter operation, offering common-mode-free machine-side operation has been evaluated, considering constraints in retrofit of old machines, not designed for converter-fed operation. Performance evaluation over the entire operating range of the plant is performed. Grid support dynamics has been assessed. Finally, application-specific challenges in the design stage are pointed out.

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“…At very high variable renewable penetrations, developing effective strategies for storage plant operation will be crucial, in terms of profit generation for the plant owner and in terms of system cost minimization. Most profit maximization algorithms do not consider the impact of reserve usage on operations [13]- [15], or assume that fixed percentages of reserve are deployed [17]- [20], often with perfect foresight of system requirements. Preliminary results based on a pumped hydro plant in the Spanish market indicate that real-time usage of reserves lead to significant deviations in reservoir volumes and plant earning using a selection of approaches to estimate the real-time reserve usage compared to perfect foresight [25].…”

Section: Introductionmentioning

confidence: 99%

Efficient Large-Scale Energy Storage Dispatch: Challenges in Future High Renewable Systems

O’Dwyer

Ryan

Flynn

2017

IEEE Trans. Power Syst.

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Future power systems with high penetrations of variable renewables will require increased levels of flexibility from generation and demand-side sources in order to maintain secure and stable operation. One potential flexibility source is largescale energy storage, which can provide a variety of ancillary services across multiple time-scales. In order for appropriate levels of investment to take place, and in order for existing assets to be utilized optimally, it is essential that market signals are present which encourage suitable levels of flexibility, either from storage or alternative sources. Suboptimal storage plant dispatch due to uncertainty and inefficient market incentives are represented as operational constraints on the storage plant, and the impact of these inefficiencies are highlighted. Thus changes required in operational practices for storage plant at different installed wind capacity levels, and the challenges that private storage plant operators will face in generating appropriate bids in a market environment at high variable renewable penetrations are explored. The impacts on system generating costs and storage profits are explored under different plant operating assumptions.

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The value of a pumping-hydro generator in a system with increasing integration of wind power

Cited by 13 publications

References 6 publications

Deriving Optimal End of Day Storage for Pumped-Storage Power Plants in the Joint Energy and Reserve Day-Ahead Scheduling

Deriving Optimal End of Day Storage for Pumped-Storage Power Plants in the Joint Energy and Reserve Day-Ahead Scheduling

Highly Flexible Indirect Modular Multilevel Converter for High Power Pumped Hydro Storage Plants

Efficient Large-Scale Energy Storage Dispatch: Challenges in Future High Renewable Systems

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