The Experts below are selected from a list of 38937 Experts worldwide ranked by ideXlab platform

Javier Contreras - One of the best experts on this subject based on the ideXlab platform.

  • Analysis of Electrical Energy Storage Technologies' State-of-the-Art and Applications on Islanded Grid Systems
    2014 IEEE PES Transmission & Distribution Conference and Exposition, 2014
    Co-Authors: Abebe W. Bizuayehu, E. M.g. Rodrigues, Joao P. S. Catalao, P. Medina, Javier Contreras
    Abstract:

    A successful deployment of Electrical Energy Storage (EES) in current electricity grid systems is a plausible episode in several power systems given the outstanding technical, economic and environmental benefits that EES provides. Also, more distributed resources are becoming key actors in remotely located renewable Energy based and poorly interconnected island grid systems. Healing these fragile grid systems in islands requires devising and promoting a robust grid system operation. Such move should go hand in hand with an increasing distributed Energy resource use to guarantee sustainable renewable Energy integration into these systems. In the present document, EES technologies and applications have been compiled, where special emphasis has been given on islands, studying their particular requirements and technology appropriateness on operating project experiences around the world, from which some lessons can be learned. Conclusions about EES technologies’ general suitability on island systems are duly drawn throughout the content of this paper.

  • Electrical Energy Storage Systems: Technologies' State-of-the-Art, Techno-economic Benefits and Applications Analysis
    2014 47th Hawaii International Conference on System Sciences, 2014
    Co-Authors: P. Medina, J. P. S. Catalão, E. M.g. Rodrigues, Abebe W. Bizuayehu, Javier Contreras
    Abstract:

    Nowadays, with the large-scale penetration of distributed and renewable Energy resources, Electrical Energy Storage (EES) stands out for its ability of adding flexibility, controlling intermittence and providing back-up generation to Electrical networks. It represents the critical link between the Energy supply and demand chains and, moreover, a key element for increasing the role and attractiveness of renewable generation into the power grid, providing numerous technical and economic benefits to the power system stakeholders. On islanded systems and micro-grids, being updated about the state-of-the-art of EES systems and their benefits becomes even more relevant. Hence, in the present paper a comprehensive analysis of EES leading technologies' main assets, research issues, global market figures, economic benefits and technical applications is provided.

  • HICSS - Electrical Energy Storage Systems: Technologies' State-of-the-Art, Techno-economic Benefits and Applications Analysis
    2014 47th Hawaii International Conference on System Sciences, 2014
    Co-Authors: P. Medina, Abebe W. Bizuayehu, Joao P. S. Catalao, Eduardo M. G. Rodrigues, Javier Contreras
    Abstract:

    Nowadays, with the large-scale penetration of distributed and renewable Energy resources, Electrical Energy Storage (EES) stands out for its ability of adding flexibility, controlling intermittence and providing back-up generation to Electrical networks. It represents the critical link between the Energy supply and demand chains and, moreover, a key element for increasing the role and attractiveness of renewable generation into the power grid, providing numerous technical and economic benefits to the power system stakeholders. On islanded systems and micro-grids, being updated about the state-of-the-art of EES systems and their benefits becomes even more relevant. Hence, in the present paper a comprehensive analysis of EES leading technologies' main assets, research issues, global market figures, economic benefits and technical applications is provided.

Massoud Pedram - One of the best experts on this subject based on the ideXlab platform.

  • CODES+ISSS - Cost-effective design of a hybrid Electrical Energy Storage system for electric vehicles
    Proceedings of the 2014 International Conference on Hardware Software Codesign and System Synthesis - CODES '14, 2014
    Co-Authors: Sangyoung Park, Yanzhi Wang, Massoud Pedram
    Abstract:

    A comprehensive economic feasibility analysis and a cost-driven design methodology are essential to the successful application of hybrid Electrical Energy Storage (HEES) systems in electric vehicles (EVs). This paper thus focuses on designing a cost-effective and high-performance HEES system for EVs, comprising of a supercapacitor bank and a lithium-ion (Li-ion) battery bank. In particular, the paper formulates the capacity provisioning problem for the EV HEES system so as to minimize the total system cost, utilizing accurate models of the battery cycle efficiency and state of health, characteristics of the supercapacitor bank, and dynamics of the EV. The aforesaid problem is subsequently solved by combining a gradient descent-based approach with a simulated annealing-based algorithm. Simulation results show that the proposed EV HEES system achieves 21% lower total cost per day and 30% higher fuel economy compared to a baseline homogeneous Electrical Energy Storage system comprised of Li-ion batteries only.

  • IECON - Model-free learning-based online management of hybrid Electrical Energy Storage systems in electric vehicles
    IECON 2014 - 40th Annual Conference of the IEEE Industrial Electronics Society, 2014
    Co-Authors: Yanzhi Wang, Massoud Pedram
    Abstract:

    To improve the cycle efficiency and peak output power density of Energy Storage systems in electric vehicles (EVs), supercapacitors have been proposed as auxiliary Energy Storage elements to complement the mainstream Lithium-ion (Li-ion) batteries. The performance of such a hybrid Electrical Energy Storage (HEES) system is highly dependent on the implemented management policy. This paper presents a model-free reinforcement learning-based approach to dynamically manage the current flows from and into the battery and supercapacitor banks under various scenarios (combinations of EV specs and driving patterns). Experimental results demonstrate that the proposed approach achieves up to 25% higher efficiency compared to a Li-ion battery only Storage system and outperforms other online HEES system control policies in all test cases.

  • DATE - Minimizing state-of-health degradation in hybrid Electrical Energy Storage systems with arbitrary source and load profiles
    Design Automation & Test in Europe Conference & Exhibition (DATE) 2014, 2014
    Co-Authors: Yanzhi Wang, Massoud Pedram
    Abstract:

    Hybrid Electrical Energy Storage (HEES) systems consisting of heterogeneous Electrical Energy Storage (EES) elements are proposed to exploit the strengths of different EES elements and hide their weaknesses. The cycle life of the EES elements is one of the most important metrics. The cycle life is directly related to the state-of-health (SoH), which is defined as the ratio of full charge capacity of an aged EES element to its designed (or nominal) capacity. The SoH degradation models of battery in the previous literature can only be applied to charging/discharging cycles with the same state-of-charge (SoC) swing. To address this shortcoming, this paper derives a novel SoH degradation model of battery for charging/discharging cycles with arbitrary patterns. Based on the proposed model, this paper presents a near-optimal charge management policy focusing on extending the cycle life of battery elements in the HEES systems while simultaneously improving the overall cycle efficiency.

  • CODES+ISSS - Designing a residential hybrid Electrical Energy Storage system based on the Energy buffering strategy
    2013 International Conference on Hardware Software Codesign and System Synthesis (CODES+ISSS), 2013
    Co-Authors: Yanzhi Wang, Massoud Pedram
    Abstract:

    Due to severe variation in load demand over time, utility companies generally raise Electrical Energy price during periods of high load demand. A grid-connected hybrid Electrical Energy Storage (HEES) system can help residential users lower their electric bills by storing Energy during low-price hours and releasing the stored Energy during high-price hours. A HEES system consists of different types of Electrical Energy Storage (EES) elements, utilizing the benefits of each type while hiding their weaknesses. This paper presents a residential Energy management system to maximize the annual profits on residential electric bills, based on a HEES system comprised of a lead-acid battery bank as the main Storage bank and a Li-ion battery bank as the Energy buffer. We first derive the optimal daily Energy management policy based on Energy buffering to minimize the daily Energy cost. Next, we find the near-optimal design specifications of the Energy management system, aiming at maximizing the amortized annual profits under practical constraints. We show that this system achieves averagely 11.10% more profits compared to the none-buffering HEES system.

  • ISLPED - SIMES: a simulator for hybrid Electrical Energy Storage systems
    International Symposium on Low Power Electronics and Design (ISLPED), 2013
    Co-Authors: Yanzhi Wang, Massoud Pedram
    Abstract:

    State-of-the-art Electrical Energy Storage (EES) systems are mainly homogeneous, i.e., they consist of a single type of EES elements. None of the existing EES elements is capable of simultaneously fulfilling all the desired features of an ideal EES system, e.g., high charge/discharge efficiency, high Energy density, low cost per unit capacity, long cycle life. A novel technology, i.e., a hybrid EES system that employs heterogeneous EES elements organized in a hierarchy of Storage banks and linked by appropriate charge transfer interconnects, has shown great promise in overcoming the aforesaid limitations of conventional EES systems. However, the widespread adoption/deployment of hybrid EES systems is hampered by lack of a hybrid EES system simulator. This paper thus presents SIMES, a powerful and scalable simulator for hybrid EES systems, which provides fast and accurate system simulations, while accounting for key characteristics of various EES elements, power converters, charge transfer interconnect schemes, etc. Experimental results on two different applications (one targeting load shifting for households, the other related to battery rate capacity effect minimization in portable electronic devices) demonstrate the value and usefulness of SIMES for designing Energy-aware facilities and products.

Yanzhi Wang - One of the best experts on this subject based on the ideXlab platform.

  • CODES+ISSS - Cost-effective design of a hybrid Electrical Energy Storage system for electric vehicles
    Proceedings of the 2014 International Conference on Hardware Software Codesign and System Synthesis - CODES '14, 2014
    Co-Authors: Sangyoung Park, Yanzhi Wang, Massoud Pedram
    Abstract:

    A comprehensive economic feasibility analysis and a cost-driven design methodology are essential to the successful application of hybrid Electrical Energy Storage (HEES) systems in electric vehicles (EVs). This paper thus focuses on designing a cost-effective and high-performance HEES system for EVs, comprising of a supercapacitor bank and a lithium-ion (Li-ion) battery bank. In particular, the paper formulates the capacity provisioning problem for the EV HEES system so as to minimize the total system cost, utilizing accurate models of the battery cycle efficiency and state of health, characteristics of the supercapacitor bank, and dynamics of the EV. The aforesaid problem is subsequently solved by combining a gradient descent-based approach with a simulated annealing-based algorithm. Simulation results show that the proposed EV HEES system achieves 21% lower total cost per day and 30% higher fuel economy compared to a baseline homogeneous Electrical Energy Storage system comprised of Li-ion batteries only.

  • IECON - Model-free learning-based online management of hybrid Electrical Energy Storage systems in electric vehicles
    IECON 2014 - 40th Annual Conference of the IEEE Industrial Electronics Society, 2014
    Co-Authors: Yanzhi Wang, Massoud Pedram
    Abstract:

    To improve the cycle efficiency and peak output power density of Energy Storage systems in electric vehicles (EVs), supercapacitors have been proposed as auxiliary Energy Storage elements to complement the mainstream Lithium-ion (Li-ion) batteries. The performance of such a hybrid Electrical Energy Storage (HEES) system is highly dependent on the implemented management policy. This paper presents a model-free reinforcement learning-based approach to dynamically manage the current flows from and into the battery and supercapacitor banks under various scenarios (combinations of EV specs and driving patterns). Experimental results demonstrate that the proposed approach achieves up to 25% higher efficiency compared to a Li-ion battery only Storage system and outperforms other online HEES system control policies in all test cases.

  • DATE - Minimizing state-of-health degradation in hybrid Electrical Energy Storage systems with arbitrary source and load profiles
    Design Automation & Test in Europe Conference & Exhibition (DATE) 2014, 2014
    Co-Authors: Yanzhi Wang, Massoud Pedram
    Abstract:

    Hybrid Electrical Energy Storage (HEES) systems consisting of heterogeneous Electrical Energy Storage (EES) elements are proposed to exploit the strengths of different EES elements and hide their weaknesses. The cycle life of the EES elements is one of the most important metrics. The cycle life is directly related to the state-of-health (SoH), which is defined as the ratio of full charge capacity of an aged EES element to its designed (or nominal) capacity. The SoH degradation models of battery in the previous literature can only be applied to charging/discharging cycles with the same state-of-charge (SoC) swing. To address this shortcoming, this paper derives a novel SoH degradation model of battery for charging/discharging cycles with arbitrary patterns. Based on the proposed model, this paper presents a near-optimal charge management policy focusing on extending the cycle life of battery elements in the HEES systems while simultaneously improving the overall cycle efficiency.

  • CODES+ISSS - Designing a residential hybrid Electrical Energy Storage system based on the Energy buffering strategy
    2013 International Conference on Hardware Software Codesign and System Synthesis (CODES+ISSS), 2013
    Co-Authors: Yanzhi Wang, Massoud Pedram
    Abstract:

    Due to severe variation in load demand over time, utility companies generally raise Electrical Energy price during periods of high load demand. A grid-connected hybrid Electrical Energy Storage (HEES) system can help residential users lower their electric bills by storing Energy during low-price hours and releasing the stored Energy during high-price hours. A HEES system consists of different types of Electrical Energy Storage (EES) elements, utilizing the benefits of each type while hiding their weaknesses. This paper presents a residential Energy management system to maximize the annual profits on residential electric bills, based on a HEES system comprised of a lead-acid battery bank as the main Storage bank and a Li-ion battery bank as the Energy buffer. We first derive the optimal daily Energy management policy based on Energy buffering to minimize the daily Energy cost. Next, we find the near-optimal design specifications of the Energy management system, aiming at maximizing the amortized annual profits under practical constraints. We show that this system achieves averagely 11.10% more profits compared to the none-buffering HEES system.

  • ISLPED - SIMES: a simulator for hybrid Electrical Energy Storage systems
    International Symposium on Low Power Electronics and Design (ISLPED), 2013
    Co-Authors: Yanzhi Wang, Massoud Pedram
    Abstract:

    State-of-the-art Electrical Energy Storage (EES) systems are mainly homogeneous, i.e., they consist of a single type of EES elements. None of the existing EES elements is capable of simultaneously fulfilling all the desired features of an ideal EES system, e.g., high charge/discharge efficiency, high Energy density, low cost per unit capacity, long cycle life. A novel technology, i.e., a hybrid EES system that employs heterogeneous EES elements organized in a hierarchy of Storage banks and linked by appropriate charge transfer interconnects, has shown great promise in overcoming the aforesaid limitations of conventional EES systems. However, the widespread adoption/deployment of hybrid EES systems is hampered by lack of a hybrid EES system simulator. This paper thus presents SIMES, a powerful and scalable simulator for hybrid EES systems, which provides fast and accurate system simulations, while accounting for key characteristics of various EES elements, power converters, charge transfer interconnect schemes, etc. Experimental results on two different applications (one targeting load shifting for households, the other related to battery rate capacity effect minimization in portable electronic devices) demonstrate the value and usefulness of SIMES for designing Energy-aware facilities and products.

Pertti Jarventausta - One of the best experts on this subject based on the ideXlab platform.

  • Using Electrical Energy Storage in residential buildings – Sizing of battery and photovoltaic panels based on electricity cost optimization
    Applied Energy, 2019
    Co-Authors: Juha Koskela, Antti Rautiainen, Pertti Jarventausta
    Abstract:

    Abstract The popularity of small-scale residential Energy production using photovoltaic power generation is predicted to increase. Self-production of electricity for self-consumption has become profitable mainly because of high-distribution costs and taxes imposed by the service providers on commercially produced electricity or because of the subsidies which reduce installation costs. Electrical Energy Storage can be used to increase the self-consumption potential of photovoltaic power. Additionally, Electrical Energy Storage can lead to other benefits such as demand response or avoiding high load peaks. In this study, the profitability and sizing of a photovoltaic system with an associated Electrical Energy Storage are analyzed from an economic perspective. The novel theory of sizing for profitability is presented and demonstrated using case studies of an apartment building and detached houses in Finland. To maximize the benefits, several alternative models for electricity metering and pricing are used and compared. The results demonstrated that the optimal size of the photovoltaic system could be increased by using Electrical Energy Storage and suitable electricity pricing. This could lead to an increasing amount of photovoltaic production in the residential sector. Additionally, it is possible that when all the incentives are taken into account, Electrical Energy Storage in combination with photovoltaic power generation would be more profitable than photovoltaic power generation alone. Photovoltaic power generation also increased the profitability of Electrical Energy Storage, which could mean that the implementation of Electrical Energy Storage in the residential sector could likewise increase.

  • using Electrical Energy Storage in residential buildings sizing of battery and photovoltaic panels based on electricity cost optimization
    Applied Energy, 2019
    Co-Authors: Juha Koskela, Antti Rautiainen, Pertti Jarventausta
    Abstract:

    Abstract The popularity of small-scale residential Energy production using photovoltaic power generation is predicted to increase. Self-production of electricity for self-consumption has become profitable mainly because of high-distribution costs and taxes imposed by the service providers on commercially produced electricity or because of the subsidies which reduce installation costs. Electrical Energy Storage can be used to increase the self-consumption potential of photovoltaic power. Additionally, Electrical Energy Storage can lead to other benefits such as demand response or avoiding high load peaks. In this study, the profitability and sizing of a photovoltaic system with an associated Electrical Energy Storage are analyzed from an economic perspective. The novel theory of sizing for profitability is presented and demonstrated using case studies of an apartment building and detached houses in Finland. To maximize the benefits, several alternative models for electricity metering and pricing are used and compared. The results demonstrated that the optimal size of the photovoltaic system could be increased by using Electrical Energy Storage and suitable electricity pricing. This could lead to an increasing amount of photovoltaic production in the residential sector. Additionally, it is possible that when all the incentives are taken into account, Electrical Energy Storage in combination with photovoltaic power generation would be more profitable than photovoltaic power generation alone. Photovoltaic power generation also increased the profitability of Electrical Energy Storage, which could mean that the implementation of Electrical Energy Storage in the residential sector could likewise increase.

P. Medina - One of the best experts on this subject based on the ideXlab platform.

  • Analysis of Electrical Energy Storage Technologies' State-of-the-Art and Applications on Islanded Grid Systems
    2014 IEEE PES Transmission & Distribution Conference and Exposition, 2014
    Co-Authors: Abebe W. Bizuayehu, E. M.g. Rodrigues, Joao P. S. Catalao, P. Medina, Javier Contreras
    Abstract:

    A successful deployment of Electrical Energy Storage (EES) in current electricity grid systems is a plausible episode in several power systems given the outstanding technical, economic and environmental benefits that EES provides. Also, more distributed resources are becoming key actors in remotely located renewable Energy based and poorly interconnected island grid systems. Healing these fragile grid systems in islands requires devising and promoting a robust grid system operation. Such move should go hand in hand with an increasing distributed Energy resource use to guarantee sustainable renewable Energy integration into these systems. In the present document, EES technologies and applications have been compiled, where special emphasis has been given on islands, studying their particular requirements and technology appropriateness on operating project experiences around the world, from which some lessons can be learned. Conclusions about EES technologies’ general suitability on island systems are duly drawn throughout the content of this paper.

  • Electrical Energy Storage Systems: Technologies' State-of-the-Art, Techno-economic Benefits and Applications Analysis
    2014 47th Hawaii International Conference on System Sciences, 2014
    Co-Authors: P. Medina, J. P. S. Catalão, E. M.g. Rodrigues, Abebe W. Bizuayehu, Javier Contreras
    Abstract:

    Nowadays, with the large-scale penetration of distributed and renewable Energy resources, Electrical Energy Storage (EES) stands out for its ability of adding flexibility, controlling intermittence and providing back-up generation to Electrical networks. It represents the critical link between the Energy supply and demand chains and, moreover, a key element for increasing the role and attractiveness of renewable generation into the power grid, providing numerous technical and economic benefits to the power system stakeholders. On islanded systems and micro-grids, being updated about the state-of-the-art of EES systems and their benefits becomes even more relevant. Hence, in the present paper a comprehensive analysis of EES leading technologies' main assets, research issues, global market figures, economic benefits and technical applications is provided.

  • HICSS - Electrical Energy Storage Systems: Technologies' State-of-the-Art, Techno-economic Benefits and Applications Analysis
    2014 47th Hawaii International Conference on System Sciences, 2014
    Co-Authors: P. Medina, Abebe W. Bizuayehu, Joao P. S. Catalao, Eduardo M. G. Rodrigues, Javier Contreras
    Abstract:

    Nowadays, with the large-scale penetration of distributed and renewable Energy resources, Electrical Energy Storage (EES) stands out for its ability of adding flexibility, controlling intermittence and providing back-up generation to Electrical networks. It represents the critical link between the Energy supply and demand chains and, moreover, a key element for increasing the role and attractiveness of renewable generation into the power grid, providing numerous technical and economic benefits to the power system stakeholders. On islanded systems and micro-grids, being updated about the state-of-the-art of EES systems and their benefits becomes even more relevant. Hence, in the present paper a comprehensive analysis of EES leading technologies' main assets, research issues, global market figures, economic benefits and technical applications is provided.