Loading...
Search for: electric-vehicles
0.013 seconds
Total 149 records

    Investigating the impacts of plug-in hybrid electric vehicles on power distribution systems

    , Article IEEE Transactions on Smart Grid ; Vol. 4, issue. 3 , 2013 , p. 1351-1360 ; ISSN: 19493053 Shafiee, S ; Fotuhi-Firuzabad, M ; Rastegar, M ; Sharif University of Technology
    Abstract
    Despite the economic and environmental advantages of plug-in hybrid electric vehicles (PHEVs), the increased utilization of PHEVs brings up new concerns for power distribution system decision makers. Impacts of PHEVs on distribution networks, although have been proven to be noticeable, have not been thoroughly investigated for future years. In this paper, a comprehensive model is proposed to study the PHEV impacts on residential distribution systems. In so doing, PHEV fundamental characteristics, i.e., PHEV battery capacity, PHEV state of charge (SOC), and PHEV energy consumption in daily trips, are accurately modeled. As some of these effective characteristics depend on vehicle owner's... 

    Designing gear-shift pattern for an electric vehicle to optimize energy consumption

    , Article ASME International Mechanical Engineering Congress and Exposition, Proceedings (IMECE) ; Vol. 11 , 2010 , pp. 837-846 ; ISBN: 9780791844489 Rahimi, M. A ; Salehi, R ; Alasty, A ; Sharif University of Technology
    Abstract
    In this paper optimization of energy consumption in an electric vehicle is presented. The main idea of this optimization is based on selecting the best gear level in driving the vehicle. Two algorithms for optimization are introduced which are based on fuzzy rules and fuzzy controllers. In first algorithm, fuzzy controller simulates energy consumption in different gear levels, and chooses the optimum gear level. While in second method, fuzzy controller detects the optimum gear level by measuring the vehicle's average speed and acceleration. To investigate the performance of these controllers, a model of TOSAN vehicle is developed and the controllers outputs are checked in simulation of TOSAN... 

    Game theoretic based charging strategy for plug-in hybrid electric vehicles

    , Article IEEE Transactions on Smart Grid ; Vol. 5,Issue. 5 , 2014 , pp. 2368-2375 ; ISSN: 19493053 Bahrami, S ; Parniani, M ; Sharif University of Technology
    Abstract
    In the future smart grids, Plug-in Hybrid Electric Vehicles (PHEVs) are seen as an important means of transportation to reduce greenhouse gas emissions. One of the main issues regarding to this sort of vehicles is managing their charging time to prevent high peak loads over time. Deploying advanced metering and automatic chargers can be a practical way not only for the vehicle owners to manage their energy consumption, but also for the utilities to manage the electricity load during the day by shifting the charging loads to the off-peak periods. Additionally, an efficient charging schedule can reduce the users' electricity bill cost. In this paper we propose a new practical demand response... 

    Analyzing and modeling of a new resonance inverter for low power vehicular application

    , Article PECon 2012 - 2012 IEEE International Conference on Power and Energy ; 2012 , Pages 576-581 ; 9781467350198 (ISBN) Mohagheghi, E ; Keipour, A ; Sudi, Z ; Moallemi, M ; Hajihosseinlu, A ; Sharif University of Technology
    2012
    Abstract
    In this paper we proposed a novel inverter to convert a DC voltage to a desired AC voltage. This inverter is designed for variable inductive loads and low output power applications. We proposed a novel simple PWM method which enables the inverter to keep the output current at six times more than the rated output current, without reducing output voltage value. In addition, based on a simple use of resonance in the circuit, the new inverter can raise the output voltage to extremely high amplitude for a relatively short time. These characteristics make the proposed inverter is useful for some industrial applications such as electrical vehicle. The new configuration of the circuit consists of a... 

    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... 

    Pricing of Vehicle-to-Grid Services in a Microgrid by Nash Bargaining Theory

    , Article Mathematical Problems in Engineering ; Volume 2017 , 2017 ; 1024123X (ISSN) Sarparandeh, M. H ; Ehsan, M ; Sharif University of Technology
    Hindawi Publishing Corporation  2017
    Abstract
    Owners of electric vehicles (EVs) can offer the storage capacity of their batteries to the operator of a microgrid as a service called vehicle-to-grid (V2G) to hold the balance between supply and demand of electricity, particularly when the microgrid has intermittent renewable energy sources. Literature review implies that V2G has economic benefits for both microgrid operator and EV owners, but it is unclear how these benefits are divided between them. The challenge grows when the policy makers rely on the V2G revenue as an incentive for expanding the penetration of EVs in the automotive market. This paper models the interaction between microgrid operator and EV owners as a bargaining game... 

    Development of a brake control system for a series hybrid electric city bus using fuzzy logic

    , Article 2006 IEEE International Conference on Mechatronics and Automation, ICMA 2006, Luoyang, 25 June 2006 through 28 June 2006 ; Volume 2006 , 2006 , Pages 1345-1350 ; 1424404665 (ISBN); 9781424404667 (ISBN) Nabi, A ; Fazeli, A ; Valizadeh, M ; Sharif University of Technology
    2006
    Abstract
    In this paper, a fuzzy based controller is developed in order to control the braking action of the rear axle of a series hybrid city bus. The controller's target is to recapture the kinetic energy of the bus as much as possible during braking, while still maintaining its stability. The bus under study Is one of the Iran-Khodro Company's productions called O457 which is currently undergoing a procedure of hybridization. The hybrid type used is a series hybrid configuration in which an internal combustion engine and a battery pack supply Its electric traction motors in order to propel the bus. The implemented fuzzy controller takes the bus speed, batteries SOC level and the brake-pedal... 

    Development of energy management system for A parallel hybrid electric vehicle using fuzzy logic

    , Article 8th Biennial ASME Conference on Engineering Systems Design and Analysis, ESDA2006, Torino, 4 July 2006 through 7 July 2006 ; Volume 2006 , 2006 ; 0791837793 (ISBN); 9780791837795 (ISBN) Fazeli, A. M ; Nabi, A ; Salmasi, F. R ; Amiri, M ; Sharif University of Technology
    2006
    Abstract
    In this paper a fuzzy power controller for a parallel hybrid passenger car is developed in order to minimize its fuel consumption and optimize its components efficiencies. This is done by controlling the engine operating points in its optimal region and maintaining the SoC of batteries and electric motor operating point at the highest possible efficiency. Of course the designed control strategy must be able to obey the driver's commands and achieve the PNGV regulations. The controller implemented in this paper is a Mamdani fuzzy logic controller which takes the batteries SoC, electric motor's speed, ICE speed and the total demanded torque as its input variables and gives the ICE torque as... 

    Network-Constrained transactive coordination for plug-in electric vehicles participation in real-time retail electricity markets

    , Article IEEE Transactions on Sustainable Energy ; Volume 12, Issue 2 , 2021 , Pages 1439-1448 ; 19493029 (ISSN) Saber, H ; Ehsan, M ; Moeini Aghtaie, M ; Fotuhi Firuzabad, M ; Lehtonen, M ; Sharif University of Technology
    Institute of Electrical and Electronics Engineers Inc  2021
    Abstract
    Uncoordinated adoption of plug-in electric vehicles (PEVs) imposes further load on the distribution network, and therefore may result in disruptive impacts on the grid. Transactive coordination of PEVs has been introduced as an effective approach to mitigate these negative consequences. This paper furthers efforts enabling PEVs to participate in a real-time retail electricity market under a transactive energy (TE) paradigm. In this regard, PEV owners will estimate their willingness to pay/accept using a user-friendly strategy and submit the estimated values to the retail market operator. Then using a network-constrained market clearing mechanism, the clearing prices, i.e., dual variables of... 

    Optimal Charge Scheduling of Plug-in Hybrid Electric Vehicles to Improve Distribution System Operatoion

    , M.Sc. Thesis Sharif University of Technology Shafiee, Soroush (Author) ; Fotuhi-Firuzabad, Mahmood (Supervisor)
    Abstract
    Despite the economic and environmental advantages of plug-in hybrid electric vehicles (PHEVs), the increased utilization of PHEVs brings up new concerns for power distribution system operators and planners. Impacts of PHEVs on distribution network, although has been proven to be noticeable, has not been completely investigated for future years. Thus, it is necessary to study precisely PHEV impacts on residential distribution systems and then try to find a method to control PHEV charging in order to improve distribution system.In this thesis, a comprehensive model is proposed to study PHEV impacts on residential distribution systems for short and long-term simulations. To do this, at first... 

    Transactive Coordination Approach for Energy Management in Microgrids (MGs)

    , Ph.D. Dissertation Sharif University of Technology Saber, Hossein (Author) ; Ehsan, Mehdi (Supervisor) ; Moeini Aghtaei, Moein (Co-Supervisor)
    Abstract
    Nowadays, due to the rapid growth of electric energy consumption at the distribution network level and the environmental problems caused by conventional generation units, it has become necessary to provide appropriate solutions to increase the penetration of renewable energy sources and optimally manage the consumers/prosumers at the demand side of power systems. In recent years, various methods have been proposed for demand-side energy management models and distributed energy resources (DERs) integration into the distribution network. Amongst them, the transactive coordination approach that employs the economic and control mechanisms for the management of DERs and responsive loads has been... 

    The Impact of Penetration of Electric Vehicles on Distribution System Planning

    , M.Sc. Thesis Sharif University of Technology Hosseini, Mir Mahdi (Author) ; Ehsan, Mahdi (Supervisor)
    Abstract
    The usage of plugin hybrid electric vehicles has environmental benefits. However, the penetration of these components raises important concerns for grid planning. Thus, it is necessary to model the load change due to their charge to investigate the impact of these vehicles on distribution networks. For this reason, it is necessary to determine the specifications of these vehicles, such as battery charge and energy consumption on daily trips. In addition, the study of some behavioral patterns of these vehicles and some experts are necessary to complete the model.In this thesis, an active distribution network is planned using dynamic programming formulation. In this model, some buses are added... 

    The Effect of the Number of Electric Vehicles on the Level of Environmental Pollution

    , M.Sc. Thesis Sharif University of Technology Moghadamzadeh, Hossein (Author) ; Hosseini, Hamid (Supervisor)
    Abstract
    The transportation and electricity industries are major emitters of greenhouse gases (GHGs). In order to reduce emissions, several strategies have been proposed, including plug-in electric vehicle (PEV) use and integration of renewable energy sources (RESs). To reduce the concern emission rate while considering economic constraints, it is important to examine different scenarios of incorporating these elements. To investigate the effectiveness of using PEVs and RES from various perspectives, this study utilizes a combined economic emission dispatch (CEED). The influence of emission and cost coefficients is examined in a sensitivity analysis. In the proposed model, two test cases containing... 

    State Plane Analysis and Optimization of CLLC Resonant Converter for Bidirectional EV Charger

    , Ph.D. Dissertation Sharif University of Technology Rezayati, Mohsen (Author) ; Tahami, Farzad (Supervisor) ; Schanen, Jean-Luc (Supervisor)
    Abstract
    As more renewables step in, the ongoing change will be drastic for the electrical grid. The energy sector must find new ways to balance energy production and consumption. Electric vehicle (EV) batteries are by far the most cost-efficient form of energy storage since they require no additional investments in hardware. A bidirectional EV charger is a new technology that enables energy to be pushed back to the power grid and auxiliary loads from the battery. The electrical requirements of the EV charger are examined in detail to find an appropriate power electronics converter to meet all the requirements. The CLLC resonant converter is a promising candidate for high efficient, bidirectional... 

    Assessing the Environmental Impact of Electric Vehicles in Different Technology Development and Energy Supply Scenarios: A Case Study of Tehran

    , M.Sc. Thesis Sharif University of Technology Habibi, Ali (Author) ; Khajehpour, Hossein (Supervisor)
    Abstract
    Air pollution has been one of the most important problems in Tehran in recent years. So that the number of deaths due to air pollution in Tehran reaches more than 7000 cases per year. More than 75% of air pollutant emissions in Tehran city (including 60% of PM2.5 emissions) originate from mobile sources. Considering the harmful effects and damages caused by air pollutants, it is important to examine and evaluate the effects of hybrid-electric vehicles on the emissions of the transportation sector and air quality, especially in areas with a large population and realized high traffic load. On the other hand, the continuous reduction of renewable electricity production costs makes electricity a... 

    Impacts of controlled and uncontrolled PHEV charging on distribution systems

    , Article IET Conference Publications ; Vol. 2012, issue. 616 CP , 2012 ; 9781850000000 Shafiee, S ; Fotuhi-Firuzabad, M ; Rastegar, M ; Sharif University of Technology
    Abstract
    Plug-in hybrid electric vehicle (PHEV) technology provides one of the most promising solutions to tackle the threatening challenges such as air pollution in urban areas. Dramatic increases in the number of PHEVs could have major impacts on power system operations because of their high electricity demand. From the distribution system operator facet, distribution system congestion during PHEVs charging is an economic and security concern. It is, therefore, necessary to investigate the effects of widespread using of PHEVs on the performance of distribution networks. In this paper, PHEV characteristics are exactly studied and a comprehensive model for investigation of PHEV impacts is achieved.... 

    A particle swarm optimization approach for robust unit commitment with significant vehicle to grid penetration

    , Article Iranian Conference on Intelligent Systems, ICIS 2014 ; 2014 Kherameh, A. E ; Aien, M ; Rashidinejad, M ; Fotuhi-Firouzabad, M
    Abstract
    Smartening of contemporaneous power delivery systems in conjunction with increased penetration of vehicle to grid (V2G) technology, changes the way market participants play their role in the market operation to maximize their profit. In V2G technology, plug-in electric vehicles (PEV) have bidirectional power flows i.e. they can either inject power to the grid or draw power from it. In recent years, the V2G technology has found a world wild attention due to its important advantages such as the peak load reduction and providing system reserve, to name a few. The unit commitment (UC) is a power system operation problem which is used to find the optimal operation schedule of generation units.... 

    Strategic charging method for plugged in hybrid electric vehicles in smart grids; A game theoretic approach

    , Article International Journal of Electrical Power and Energy Systems ; Volume 53, Issue 1 , December , 2013 , Pages 499-506 ; 01420615 (ISSN) Sheikhi, A ; Bahrami, S ; Ranjbar, A. M ; Oraee, H ; Sharif University of Technology
    2013
    Abstract
    Implementation of various incentive-based and time-based load management strategies has great potential to decrease peak load growth and customer electricity bill cost. In recent years, developments in Plug in Hybrid Electric Vehicles (PHEVs) have provided various environmental and economic advantages. However, high penetration of electric vehicles in to the grid may cause high peak loads at different times of the days. Using advanced metering and automatic chargers makes it possible to optimize the charging cost, and release generation capacities to provide sustainable electricity supply. Using an appropriate encouraging program is a simple way for vehicle owners to manage their energy... 

    The plug-in electric vehicles for power system applications: The vehicle to grid (V2G) concept

    , Article 2012 IEEE International Energy Conference and Exhibition, ENERGYCON 2012 ; 2012 , Pages 1101-1106 ; 9781467314541 (ISBN) Hosseini, S. S ; Badri, A ; Parvania, M ; Sharif University of Technology
    2012
    Abstract
    The emergence and implementation of advanced smart grid technologies will enable enhanced utilization of electric vehicles (EVs) as mobile energy storage devices which can provide system-wide services. With significant penetration of EVs in the near future, the concept, introduced in literature as vehicle to grid (V2G), will be practically possible. The V2G concept eases the integration of renewable energy into power system and gives new force to inevitable move toward power generation by clean energy resources. Therefore utilizing energy storage in EVs is undeniable due to economic and environment benefits. The V2G concept has been the field of many researches in different aspects so far.... 

    Developing a multi-objective framework for planning studies of modern distribution networks

    , Article 2016 International Conference on Probabilistic Methods Applied to Power Systems, PMAPS 2016 - Proceedings, 16 October 2016 through 20 October 2016 ; 2016 ; 9781509019700 (ISBN) Haji Seyed Olia, S. A ; Jooshaki, M ; Moeini Aghtaie, M ; Fotuhi Firuzabad, M ; Sharif University of Technology
    Institute of Electrical and Electronics Engineers Inc  2016
    Abstract
    This paper presents a new framework for planning studies of modern distribution networks. Presence of electric vehicles (EVs) and various technologies of distributed generation (DG) technologies are considered in the studies as two upcoming events of the future systems. In this regard, place and capacity of DG units along with the reinforcement of distribution lines are determined running a multi-objective (MO) optimization algorithm. Total losses of the distribution network along with annualized cost of expansion plans including investment, operation and maintenance costs are introduced as the main criteria which should be optimized in the proposed framework. An effective Posteriori...