Comparison of two energy storage options for optimum balancing of wind farm power outputs

Hayes, Barry; Wilson, Alister; Webster, R. G.; Djokić, Saša Ž.

doi:10.1049/iet-gtd.2015.0486

Cited by 35 publications

(17 citation statements)

References 36 publications

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“…The choice of the optimal number of states generally depends on a number of factors related to the target application. For instance, some studies such as the one focussing on the comparison of two energy storage options in Hayes et al (2016), require long time histories (in that case 40 years) with short time steps. Assuming the same computational power as the one used for this study, and the same time step of 1 Hz (although the study cited uses a longer time step) generating this time history would require almost four days of computation using the NMC-32, and less than one day using NMC-8.…”

Section: Resultsmentioning

confidence: 99%

Wind modelling with nested Markov chains

Tagliaferri

Hayes

Viola

et al. 2016

Journal of Wind Engineering and Industrial Aerodynamics

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Markov chains (MCs) are statistical models used in many applications to model wind speed. Their main feature is the ability to represent both the statistical and temporal characteristics of the modelled wind speed data. However, MCs are not able to capture wind characteristics at high frequencies, and, by definition, in an MC the dependence on events far in the past is lost. This is reflected by a poor match of autocorrelation function of recorded data and artificially generated time series. This study presents a new method for generating artificial wind speed time series. This method is based on nested Markov chains (NMCs), which are an extension of MC models, where each state in the state space can be seen as a selfcontained MC. The approach is designed to be flexible, so that the number and distribution of NMC states can be adjusted according to user requirements for model accuracy and computational efficiency. The model is tested on two datasets recorded in two UK locations, one onshore and one offshore. Results indicate that NMCs are able to capture the temporal self-dependence of wind speed data better than MCs, as shown by the better match of the autocorrelation functions of recorded and artificially generated time series.

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Section: Resultsmentioning

confidence: 99%

Wind modelling with nested Markov chains

Tagliaferri

Hayes

Viola

et al. 2016

Journal of Wind Engineering and Industrial Aerodynamics

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“…erefore, the development and the use of large-scale and high-efficiency energy storage technologies are the basis for future changes in the energy system [1][2][3][4][5]. As one of the promising approaches for energy storage, VRFB has drawn great attention since it possesses advanced characteristics such as flexible battery assembly design, long cycle life, large battery capacity, low self-discharge, and no cross contamination [6][7][8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

“…Variation of cell efficiency (a) and discharge capacity (b) after 50 cycles of charge-discharge tests for cells equipped with GF and hydroxyl MWCNTs/GF electrode 8. Journal of Chemistry electrochemical catalytic activity and reversibility of the hydroxyl MWCNTs/GF electrode.…”

mentioning

confidence: 99%

A Comprehensive Study on Hydroxyl Multiwalled Carbon Nanotubes Used as Catalysts for VO₂⁺/VO²⁺ Reaction in Vanadium Redox Flow Battery

Bai

et al. 2019

Journal of Chemistry

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A comprehensive study on the hydroxyl multiwalled carbon nanotubes (hydroxyl MWCNTs) as catalysts in a positive reaction was performed to improve the efficiency of the vanadium redox flow battery (VRFB). e physicochemical properties of the hydroxyl MWCNT-modified electrode were characterized by using a scanning electron microscope (SEM), conductivity measurement, Brunner-Emmet-Teller (BET) measurement, X-ray photoelectron spectroscopy (XPS) analysis, cyclic voltammetry (CV) tests, electrochemical impedance spectroscopy (EIS) analysis, and charge-discharge tests. e prepared composite electrode possesses a huge amount of oxygen-containing groups, high-specific surface area, high electrical conductivity, and high catalytic activity towards the VO 2 + /VO 2+ reaction based on physicochemical characterization. e hydroxyl MWCNT-modified graphite felt (hydroxyl MWCNTs/GF) shows the best cell performance with the energy efficiency of 79.74% and remains in high stability after 50 cycles. e improved cell performance is probably ascribed to the increase in active sites, fast charge transfer, and mass transfer rate of the introduced hydroxyl MWCNTs.

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“…Note that the existing reports generally focused on the comparison for pure electric energy storages [37][38][39] or thermal energy auxiliaries [40][41][42], and only a few scholars carried out the comparative analysis of electric energy storages and thermal energy auxiliaries [43,44]. Very few works contributed to the general evaluation method, which was applicable to these two kinds of additional equipment, and conducted a systematic comparison in the cogeneration system with the high penetration of wind power.…”

Section: Introductionmentioning

confidence: 99%

Comparative Study of Electric Energy Storages and Thermal Energy Auxiliaries for Improving Wind Power Integration in the Cogeneration System

Chen

Lei

2018

Energies

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Abstract:In regards to the cogeneration system in Northern China, mainly supported by combined heat and power (CHP) plants, it usually offers limited operation flexibility due to the joint production of electric and thermal power. For that large-scale wind farms included in the cogeneration system, a large amount of wind energy may have to be wasted. To solve this issue, the utilization of the electric energy storages and the thermal energy auxiliaries are recommended, including pumped hydro storage (PHS), compressed air energy storage (CAES), hydrogen-based energy storage (HES), heat storage (HS), electric boilers (EB), and heat pumps (HP). This paper proposes a general evaluation method to compare the performance of these six different approaches for promoting wind power integration. In consideration of saving coal consumption, reducing CO 2 emissions, and increasing investment cost, the comprehensive benefit is defined as the evaluation index. Specifically, a wind-thermal conflicting expression (WTCE) is put forward to simplify the formulation of the comprehensive benefit. Further, according to the cogeneration system of the West Inner Mongolia (WIM) power grid, a test system is modelled to perform the comparison of the six different approaches. The results show that introducing the electric energy storages and the thermal energy auxiliaries can both contribute to facilitating wind power integration, and the HP can provide the best comprehensive benefit.

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Comparison of two energy storage options for optimum balancing of wind farm power outputs

Abstract: This paper presents a simple methodology for analysing and optimizing combined wind generation and storage schemes, using both technical and economic performance criteria.

Cited by 35 publications

References 36 publications

Wind modelling with nested Markov chains

Wind modelling with nested Markov chains

A Comprehensive Study on Hydroxyl Multiwalled Carbon Nanotubes Used as Catalysts for VO₂⁺/VO²⁺ Reaction in Vanadium Redox Flow Battery

Comparative Study of Electric Energy Storages and Thermal Energy Auxiliaries for Improving Wind Power Integration in the Cogeneration System

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Comparison of two energy storage options for optimum balancing of wind farm power outputs

Abstract: This paper presents a simple methodology for analysing and optimizing combined wind generation and storage schemes, using both technical and economic performance criteria.

Cited by 35 publications

References 36 publications

Wind modelling with nested Markov chains

Wind modelling with nested Markov chains

A Comprehensive Study on Hydroxyl Multiwalled Carbon Nanotubes Used as Catalysts for VO2+/VO2+ Reaction in Vanadium Redox Flow Battery

Comparative Study of Electric Energy Storages and Thermal Energy Auxiliaries for Improving Wind Power Integration in the Cogeneration System

Contact Info

Product

Resources

About

A Comprehensive Study on Hydroxyl Multiwalled Carbon Nanotubes Used as Catalysts for VO₂⁺/VO²⁺ Reaction in Vanadium Redox Flow Battery