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    Home load management in a residential energy hub

    , Article Electric Power Systems Research ; Volume 119 , 2015 , Pages 322-328 ; 03787796 (ISSN) Rastegar, M ; Fotuhi Firuzabad, M ; Lehtonen, M ; Sharif University of Technology
    Elsevier Ltd  2015
    Abstract
    One way of more efficiently utilizing the existing gas and electrical infrastructures is to consider them as one integrated system in planning and operation of energy systems. The energy hub framework is adopted to determine a modeling procedure for such multi carrier energy systems. This paper presents a residential energy hub model for a smart home. A residential combined heat and power (CHP) as a cogeneration technology, and a plug-in hybrid electric vehicle are employed in the model. Operation of the hub is optimized through a proposed optimization-based formulation. The objective is to minimize customer payment cost. Solving the problem determines how much of each energy carrier the... 

    Dynamic load management for a residential customer; Reinforcement Learning approach

    , Article Sustainable Cities and Society ; Volume 24 , 2016 , Pages 42-51 ; 22106707 (ISSN) Sheikhi, A ; Rayati, M ; Ranjbar, A. M ; Sharif University of Technology
    Elsevier Ltd 
    Abstract
    United Nation aims to double the global rate of improvement in energy efficiency as one of the sustainable development goals. It means researchers should focus on energy systems to enhance their overall efficiency. One of the effective solution to move from suboptimal energy systems to optimal ones is analyzing energy system in Energy Hub (EH) framework. In EH framework, interactions between different energy carriers are considered in supplying the required loads. The couplings and selecting proper combinations of inputs energy carriers lead to more optimized and intelligent consumption. The appropriate combination is found by solving an optimization problem at each time step. Utilizing... 

    Optimizing Smart Energy Hub Operation by Reinforcement Learning Approach

    , M.Sc. Thesis Sharif University of Technology Rayati, Mohammad (Author) ; Ranjbar, Ali Mohammad (Supervisor)
    Abstract
    Nowadays, demands increment is one of the greatest concerns of energy systems operators. Consequently, enhancing the efficiency of consumption is an inevitable goal, which leads us to a concept named as energy hub (EH). In a simple definition, an EH is a multi-generation system where different energy carriers are converted and stored by various devices such as combined cooling, heating and power (CCHP), battery, and boiler to meet the load demands. In addition, with advent of smart grids (SG), demand side management (DSM) becomes one of the effective techniques with significant role in optimizing energy systems performance. DSM commonly refers to methods implemented by utility companies to... 

    Market based short term scheduling in energy hub in presence of responsive loads and renewable resources

    , Article IET Conference Publications ; Volume 2013, Issue 615 CP , 2013 ; 9781849197328 (ISBN) Pazouki, S ; Haghifam, M ; Sharif University of Technology
    2013
    Abstract
    Energy hub as a super node in electrical distribution level has strong potential to receive energy in various carriers and after convert and store, satisfy hub required demands. On the other hand, CO2 emission and fossil fuels reduction raise up the need for integration of renewable based electricity generation such as wind and solar to energy hubs. In this paper, economical operation of energy hub including, stochastic wind generation, Combined Heat and Power (CHP) unit, boiler, and heat and electricity storages are modelled and analyzed. Responsive loads are used for more flexibility of the studied energy hub. Numerical result is observed through GAMS software to serve a commercial load in... 

    Centralized home energy management in multi-carrier energy frameworks

    , Article 2015 IEEE 15th International Conference on Environment and Electrical Engineering, EEEIC 2015 - Conference Proceedings, 10 June 2015 through 13 June 2015 ; 2015 , Pages 1562-1566 ; 9781479979936 (ISBN) Rastegar, M ; Fotuhi-Firuzabad, M ; Zareipour, H ; Sharif University of Technology
    Institute of Electrical and Electronics Engineers Inc  2015
    Abstract
    This paper proposes a centralized optimization-based home energy management (HEM) scheme in a macro energy hub structure. An energy hub management system manages the aggregated load of a group of residential micro energy hubs to minimize the total load deviation. The operational characteristics of the household appliances and the threshold energy cost of the customers are incorporated in the propounded method to provide the customers' comfort. Numerical studies show the effectiveness of the proposed method performance  

    Generalized analytical approach to assess reliability of renewable-based energy hubs

    , Article IEEE Transactions on Power Systems ; Volume 32, Issue 1 , 2017 , Pages 368-377 ; 08858950 (ISSN) Moeini Aghtaie, M ; Farzin, H ; Fotuhi Firuzabad, M ; Amrollahi, R ; Sharif University of Technology
    Institute of Electrical and Electronics Engineers Inc  2017
    Abstract
    This paper proposes a generalized analytical approach to evaluate the reliability of active distribution networks. The studies are implemented in the context of renewable-based energy hubs. The reliability of energy demands is determined as a function of reliability characteristics of energy hub input resources and converters as well as hub operating strategies. The framework proposed in this paper involves the main attributes of different distributed generation technologies as well as vehicle-to-grid (V2G)-capable vehicles in the reliability studies. Dealing with the uncertainty in energy services provided by the wind turbine output generation and V2G programs, efficient probabilistic... 

    Optimal integrated sizing and planning of hubs with midsize/large CHP units considering reliability of supply

    , Article Energy Conversion and Management ; Volume 148 , 2017 , Pages 974-992 ; 01968904 (ISSN) Moradi, S ; Ghaffarpour, R ; Ranjbar, A. M ; Mozaffari, B ; Sharif University of Technology
    Elsevier Ltd  2017
    Abstract
    Use of multi-carrier energy systems and the energy hub concept has recently been a widespread trend worldwide. However, most of the related researches specialize in CHP systems with constant electricity/heat ratios and linear operating characteristics. In this paper, integrated energy hub planning and sizing is developed for the energy systems with mid-scale and large-scale CHP units, by taking their wide operating range into consideration. The proposed formulation is aimed at taking the best use of the beneficial degrees of freedom associated with these units for decreasing total costs and increasing reliability. High-accuracy piecewise linearization techniques with approximation errors of... 

    Optimal scheduling of renewable-based energy hubs considering time-of-use pricing scheme

    , Article 2017 IEEE Smart Grid Conference, SGC 2017, 20 December 2017 through 21 December 2017 ; Volume 2018-January , March , 2018 , Pages 1-6 ; 9781538642795 (ISBN) Pasban Gajan, A ; Moeini Aghtaie, M ; Parvini, Z ; Fotuhi Firuzabad, M ; Sharif University of Technology
    Institute of Electrical and Electronics Engineers Inc  2018
    Abstract
    To more clearly show the abilities of multi-energy carrier systems in managing different energy demands, this paper investigates optimal scheduling of an energy hub in presence of price-based demand response (DR) programs. In this regard, the mathematical model of different energy converters and storage units including combined heat and power (CHP), electrical storage, heat storage and ice storage are extracted. Then, time-of-use (TOU) electrical energy price is set in such a way to reach lower demand in peak hours. Extracting the optimization model of energy scheduling for an energy hub in presence of TOU DR program, the proposed algorithm is implemented on a typical energy hub and the... 

    The energy hub: An extensive survey on the state-of-the-art

    , Article Applied Thermal Engineering ; Volume 161 , 2019 ; 13594311 (ISSN) Sadeghi, H ; Rashidinejad, M ; Moeini Aghtaie, M ; Abdollahi, A ; Sharif University of Technology
    Elsevier Ltd  2019
    Abstract
    Today's world energy-related challenges, ranging from anthropogenic climate change to continuous growth of demand for different energy forms, have enforced planners of energy systems (ESs) to concentrate on more optimal and eco-friendly operation and/or expansion planning methodologies. In this context, increased interdependencies of gas, heat and electricity ESs have recently encouraged the planners to design operation and/or expiation strategies in an integrated manner in favor of a new concept, the so-called “Energy Hub” (EH). Although this concept has been employed so far in a multitude of studies, but its real nature, advantages, difficulties, importance or inevitability aspect, and... 

    Energy management of Plug-In Hybrid Electric Vehicles in renewable-based energy hubs

    , Article Sustainable Energy, Grids and Networks ; Volume 32 , 2022 ; 23524677 (ISSN) Moeini Aghtaie, M ; Dehghanian, P ; Davoudi, M ; Sharif University of Technology
    Elsevier Ltd  2022
    Abstract
    Proliferation of Plug-in Hybrid Electric Vehicles (PHEVs) and integration of various distributed generation (DG) technologies have been recognized to play an undeniable role in modern power systems of the future. In order to effectively model the interactions of these two technologies, this paper develops a multi-criteria framework to coordinate the charging behaviors of PHEVs within an energy hub platform. In this regard, the desirable charging profiles from the viewpoint of both PHEV owners and hub manager are first captured and reported to the PHEVs Coordinator Entity (PCE). The PCE, then, runs an optimization framework in which several criteria including the PHEV owners’ convenience,... 

    Multi Objective Optimization of Distributed Energy Systems Considering Renewables and Fossil Fuel Resources

    , M.Sc. Thesis Sharif University of Technology Maroufmashat, Azadeh (Author) ; Sattari Khavas, Sourena (Supervisor) ; Roshandel, Ramin (Supervisor)
    Abstract
    Urban energy systems are responsible for the majority of the energy consumption around the world and they play an important role in energy issues such as economic security and climate change. Furthermore, there are growing concerns about the depletion of fossil fuel resources and the negative effect they have had on the ecosystem. To this end, a holistic and integrated approach is necessary for the optimal design and operation of urban energy systems that makes expressive betterment in energy efficiency and environmental impact. The aim of this research is to develop an optimum methodology for communities in the context of energy hub. The energy hub is a novel concept to systematically... 

    Game Theory Approach in Decisional Process of Multi-Carrier Energy Systems in the Context of Energy Hub

    , M.Sc. Thesis Sharif University of Technology Sobhani, Omid (Author) ; Sabouhi, Yadollah (Supervisor) ; Rajabi Ghahnavieh, Abbas (Co-Advisor)
    Abstract
    By increasing the penetration of distributed generation (DG) technologies such as photovoltaiec, μCHP etc, power generation system is moving from a centralized network to a distributed scheme with different generation units at lower level of voltage.This trend will provide the opportunity for cosumers to make decision when and which source of energy to use, due to the owner’s objectives. Here, to investigate these aspects, we use the energy hub framework, considering different energy carrier networks, DGs and storage devices. In this thesis, we model and simulate an energy system containing three interconnected energy hubs, which serve as interface between suppliers and consummers. In an... 

    Home load management in a residential energy hub

    , Article Electric Power Systems Research ; Vol. 119, issue , 2015 , p. 322-328 ; ISSN: 3787796 Rastegar, M ; Fotuhi-Firuzabad, M ; Lehtonen, M ; Sharif University of Technology
    Abstract
    One way of more efficiently utilizing the existing gas and electrical infrastructures is to consider them as one integrated system in planning and operation of energy systems. The energy hub framework is adopted to determine a modeling procedure for such multi carrier energy systems. This paper presents a residential energy hub model for a smart home. A residential combined heat and power (CHP) as a cogeneration technology, and a plug-in hybrid electric vehicle are employed in the model. Operation of the hub is optimized through a proposed optimization-based formulation. The objective is to minimize customer payment cost. Solving the problem determines how much of each energy carrier the... 

    Developing a multi-objective multi-layer model for optimal design of residential complex energy systems

    , Article International Journal of Electrical Power and Energy Systems ; Volume 138 , 2022 ; 01420615 (ISSN) Davoudi, M ; Jooshaki, M ; Moeini Aghtaie, M ; Hossein Barmayoon, M ; Aien, M ; Sharif University of Technology
    Elsevier Ltd  2022
    Abstract
    Optimal planning of residential complex energy systems requires thorough mathematical modelling to address the interconnections between all the energy installations from the largest ones, shared by all the residents, to the smallest ones in each distinct unit. Besides, conflicting desires of investors and residents in various aspects such as reliability index make this problem more challenging. In response, this paper presents a thorough framework to obtain the optimum design and operation of a residential complex energy system from scratch. To address the appropriate interconnection between various components of such an energy system, a multi-layer energy hub structure is proposed. Besides,... 

    Planning and Optimization of an On-site Energy Service Network for a Rural Region

    , M.Sc. Thesis Sharif University of Technology Ahadi, Hassan (Author) ; Avami, Akram (Supervisor)
    Abstract
    Nowadays, classic energy supply systems are rapidly shifting towards more efficient, with less pollution, and more economic energy systems. In the meantime, the growing dependence of human activities on energy sources and the reduction of fossil fuels resources as the main source of energy supply at present time, has led to fundamental changes in the energy policy of communities. The use of distributed power generation systems utilizing renewable energy sources is one of the solutions that have been proposed in this regard. This research aims to develop a local energy supply network for a specific rural district using energy sources in place, so that the area is energy self-sufficient and... 

    Optimization and Scheduling Smart Energy Hub under Uncertainty of Distributed Energy Resources

    , M.Sc. Thesis Sharif University of Technology Roustaei, Mahmoud (Author) ;
    Abstract
    Besides increasing the installation of distributed generation plants, investigating multi-carrier energy systems leads recent studies to focus on Smart Energy Hub (S.E.Hub) systems. S.E.Hub systems incorporate several modules which optimal size and operation of each have already attracted a great deal of research. Uncertainty in the modelling of these modules is an imperative factor that has not been associated in S.E.Hub models properly. To build up a more precise framework for S.E.Hubs, here we present a stochastic model for electricity and natural-gas prices, electricity and heat demands, and emission costs. In this paper, S.E.Hub operates based on minimizing weighted sum function which... 

    Optimization of Sizing and Operation for a Multi-Carrier Energy System

    , M.Sc. Thesis Sharif University of Technology Sheikhi, Aras (Author) ; Ranjbar, Ali Mohammad (Supervisor)
    Abstract
    Increasing energy demand and at the same time, considering exhaustible fossil fuel resources has led to increase distributed generation for reducing energy loss and increasing efficiency of energy systems specially due to technical development on generation systems that meet environmental and energy policy concerns. One of the most important distributed energy technologies is Combined Heat and Power (CHP). CHP is small, high efficiency, low installation time and self-contained electric generation plant that can provide power for household applications, commercial or industrial facilities and hence its applications are overtly increasing. It can reduce power loss and enhance service... 

    Presenting a New Model for Planning Studies of a Multi-energy Microgrid to Achieve a Low-carbon Society

    , M.Sc. Thesis Sharif University of Technology Nasiri, Tohid (Author) ; Moeini Aghtaie, Moein (Supervisor)
    Abstract
    With the growing population and the development of human societies, the demand for energy increases. And it is expected that for the next few decades, fossil fuels will continue to be recognized as the main sources of energy supply and used to meet energy demand. One of the biggest disadvantages of fossil fuel consumption is the emission of greenhouse gases such as carbon dioxide, which raises the Earth's temperature and has devastating effects on the climate and the lives of its inhabitants. On the other hand, fossil fuels are recognized as non-renewable sources and their lifespan is only for the next few decades. Today, one of the major concerns of societies, especially in developed... 

    Online multicriteria framework for charging management of PHEVs

    , Article IEEE Transactions on Vehicular Technology ; Vol. 63, issue. 7 , September , 2014 , p. 3028-3037 ; ISSN: 189545 Moeini-Aghtaie, M ; Abbaspour, A ; Fotuhi-Firuzabad, M ; Sharif University of Technology
    Abstract
    Societal concerns over global warming issues and dependence on fossil fuels have caused the vehicle market share of plug-in hybrid electric vehicles (PHEVs) to grow. A large penetration of PHEVs, however, would likely put higher stress on power systems. To lessen the PHEVs' harmful impacts on the distribution grid, this paper proposes a two-stage charging control strategy modeled on a renewable-based energy hub. In the first stage, a home-based charging control method is formulated in which the charging cost of PHEVs is considered as an objective. Running this procedure by PHEV schedulers in houses, in the second stage of the proposed strategy, the PHEV coordinator agent (PCA) applies a... 

    Optimising operational cost of a smart energy hub, the reinforcement learning approach

    , Article International Journal of Parallel, Emergent and Distributed Systems ; 2014 ; ISSN: 17445760 Rayati, M ; Sheikhi, A ; Ranjbar, A. M ; Sharif University of Technology
    Abstract
    The concept of smart grid (SG) has been introduced to improve the operation of the power systems. In modern structures of power systems, different reasons prompt researchers to suggest integrated analysis of multi-carrier energy systems. Considering synergy effects of the couplings between different energy carriers and utilising intelligent technologies for monitoring and controlling of energy flow may change energy system management in the future. In this paper, we propose a new solution which is entitled ‘smart energy hub’ (SEH) that models a multi-carrier energy system in a SG. SEH solutions allow homeowners to manage their energy consumption to reduce their electricity and gas bill. We...