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    Risk-based bidding of large electric utilities using Information Gap Decision Theory considering demand response

    , Article Electric Power Systems Research ; Vol. 114, issue , September , 2014 , p. 86-92 Kazemi, M ; Mohammadi-Ivatloo, B ; Ehsan, M ; Sharif University of Technology
    Abstract
    The present study presents a new risk-constrained bidding strategy formulation of large electric utilities in, presence of demand response programs. The considered electric utility consists of generation facilities, along with a retailer part, which is responsible for supplying associated demands. The total profit of utility comes from participating in day-ahead energy markets and selling energy to corresponding consumers via retailer part. Different uncertainties, such as market price, affect the profit of the utility. Therefore, here, attempts are made to make use of Information Gap Decision Theory (IGDT) to obtain a robust scheduling method against the unfavorable deviations of the market... 

    New approach for strategic bidding of gencos in energy and spinning reserve markets

    , Article Energy Conversion and Management ; Volume 48, Issue 7 , 2007 , Pages 2044-2052 ; 01968904 (ISSN) Soleymani, S ; Ranjbar, A. M ; Shirani, A. R ; Sharif University of Technology
    2007
    Abstract
    In restructured and de-regulated power systems, generating companies (Gencos) are responsible for supplying electricity for both energy and reserve markets, which usually operate simultaneously. In this condition, the question is how much and for what price must each Genco generate for each market to maximize its profit, so this paper intends to answer to this question. In this paper, first, the combined energy and reserve markets are considered, and the Nash equilibrium points are determined. Then, the bidding strategies for each Genco at these points will be presented. The bids for the energy and 10 min spinning reserve (TMSR) markets are separated in the second stage, and again, the... 

    Determination of available transfer capability with implication of cascading collapse uncertainty

    , Article IET Generation, Transmission and Distribution ; Vol. 8, issue. 4 , 2014 , p. 705-715 ; ISSN: 17518687 Salim, N. A ; Othman, M. M ; Serwan, M. S ; Fotuhi-Firuzabad, M ; Safdarian, A ; Musirin I ; Sharif University of Technology
    Abstract
    Available transfer capability (ATC) provides important information for power marketers and planning sectors in restructured power systems. The stochastic nature of power system behaviour, however, made ATC determination a difficult and complicated task. A stochastic framework has been established for ATC calculation with implication of uncertainties in transmission failures, hourly peak loads and system cascading collapse. The proposed ATC calculation framework is based on parametric bootstrap technique which enables generating random samples of system operating condition with uncertainty at a predefined confidence interval. The IEEE RTS-96 network is employed to demonstrate the... 

    Investigation of the current maintenance experiences in power distribution utulities of Iran

    , Article IET Conference Publications ; Vol. 2013, issue. 615 CP , 2013 ; ISBN: 9781850000000 Dehghanian, P ; Fotuhi-Firuzabad, M ; Moghimi, S. E ; Khomami, M. S ; Sharif University of Technology
    Abstract
    This paper presents the most frequently used maintenance concerns and challenges in distribution utilities of Iran. A questionnaire is devised and distributed among the maintenance experts in more than 30 distribution utilities all over Iran and their responses have been taken under consideration in this paper. The aim is to get the most out of the successful maintenance experiences within the utilities, to find the solutions on the current common challenges on the distribution system maintenance policies, and eventually to enlighten the way on the transition to the more efficient maintenance approaches such as reliability-centered maintenance (RCM) in distribution systems  

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

    , Article IET Conference Publications ; Vol. 2013, issue. 615 CP , 2013 ; ISBN: 9781850000000 Shafiee, S ; Fotuhi-Firuzabad, M ; Rastegar, M ; Sharif University of Technology
    Abstract
    Smart grids are envisioned to support large penetrations of electrical vehicles driven by economical and environmental signals. Nevertheless, distribution system operators are becoming concerned about distribution congestion that may occur in the network with multiple domestic plug-in hybrid electric vehicles (PHEVs) charging. Therefore, investigating the impacts of high PHEV penetration levels on the performance of distribution networks seems to be essential for system operators and planners. Doing so, in this paper, PHEV characteristics are precisely extracted from valid published reports and surveys. Accordingly, a comprehensive model for investigating the impacts of different PHEV... 

    Wind farm layout optimization using imperialist competitive algorithm

    , Article Journal of Renewable and Sustainable Energy ; Vol. 6, Issue. 4 , July , 2014 ; ISSN: 19417012 Kiamehr, K ; Hannani, S. K ; Sharif University of Technology
    Abstract
    In this work, the wind farm layout optimization problem is dealt with using a new approach. The aim of wind farm layout optimization is to maximize the output power of a wind farm considering the wake losses. Layout optimization minimizes the wake losses regarding the location of the turbines. Three different wind scenarios with different wind direction angles, wind direction blowing probabilities, and Weibull distribution parameters are assumed. Since, the problem is nonlinear and constrained, imperialist competitive algorithm is used as a modern and powerful algorithm for continuous optimization problems. The optimization outcomes indicate that imperialist competitive algorithm yields... 

    Evaluation of intelligent distribution network response to plug-in hybrid electric vehicles

    , Article 2013 IEEE Grenoble Conference PowerTech, POWERTECH 2013 ; June , 2013 ; 9781467356695 (ISBN) Sheikhi, A ; Maani, A ; Ranjbar, A. M ; Sharif University of Technology
    2013
    Abstract
    Plug-in Hybrid Electric Vehicles (PHEV) have the potential to limit emissions and reduce the cost of transportation. Although wide scale adoption of plug-in vehicles is still a few years away, politicians, electric utilities, and auto companies are eagerly awaiting the opportunities that may arise from reduction of emissions and gasoline and oil consumption, new services and increased revenues, and new markets that would create new jobs. For consumers, plug-in vehicles will significantly lower operational costs when compared with traditional gasoline cars. The savings are potentially high, in average, as electricity cost mile work out to about one forth of gasoline. But it is noticeable to... 

    Performance evaluation of energy meters in nonses'usoidal environment based on IEEE 1459 standard

    , Article 22nd International Conference and Exhibition on Electricity Distribution, CIRED 2013; Stockholm; Sweden; 10 June 2013 through 13 June 2013 ; Volume: 2013, Issue: 615 , 2013 ; 9781849197328 (ISBN) Youhannaei, M ; Honarmand, M. E ; Ouni, S ; Mehri, R ; Behinh, Y ; Mokhtari, H ; Talebi, J ; Sharif University of Technology
    2013
    Abstract
    The objective of this work is to study the effects of harmonics on energy meters. This study is canied out based on IEEE 1459 standard through extensive tests on some energy meters installed at Gil an utility consumers. First, a review on IEEE 1459 standard on power definitions will be given. The definitions are then ervaluated for a compact Fluorescent Lamp (CFL) as a harmonic generating load. Then, the results of the performance e-alnation of two energy meters are presented for different linear and nonlinear loads based on IEEE1459 standard power definitions. Two different test procedures are performed for this putpose. In the first series of tests, a harmonic polluted voltage is applied... 

    Application of pulse closing technology for automatic loop restoration

    , Article IET Conference Publications ; Volume 2013, Issue 615 CP , 2013 ; 9781849197328 (ISBN) Kazemi, S ; Millar, R. J ; Lehtonen, M ; Fotuhi-Firuzabad, M ; Sharif University of Technology
    2013
    Abstract
    This paper aims to quantitatively evaluate and compare the reliability impact of employing an automatic loop restoration scheme in a typical distribution system, with and without pulse closing technology. Sustained interruptions, momentary interruptions and voltage sags are the three major attributes of the service reliability that are taken into account in the reliability case studies  

    Investigation of the current maintenance experiences in power distribution utulities of Iran

    , Article IET Conference Publications, Stockholm,Sweden ; Volume 2013, Issue 615 CP , June , 2013 , Page(s):1 - 4 ; 9781849197328 (ISBN) Dehghanian, P ; Fotuhi-Firuzabad, M ; Moghimi, S. E ; Khomami, M. S ; Sharif University of Technology
    2013
    Abstract
    This paper presents the most frequently used maintenance concerns and challenges in distribution utilities of Iran. A questionnaire is devised and distributed among the maintenance experts in more than 30 distribution utilities all over Iran and their responses have been taken under consideration in this paper. The aim is to get the most out of the successful maintenance experiences within the utilities, to find the solutions on the current common challenges on the distribution system maintenance policies, and eventually to enlighten the way on the transition to the more efficient maintenance approaches such as reliability-centered maintenance (RCM) in distribution systems  

    Wind farm optimal connection to transmission systems considering network reinforcement using cost-reliability analysis

    , Article IET Renewable Power Generation ; Volume 7, Issue 6 , 2013 , Pages 603-613 ; 17521416 (ISSN) Taherkhani, M ; Hosseini, S. H ; Sharif University of Technology
    2013
    Abstract
    In this study, a novel network reinforcement model incorporating optimal wind farms (WFs) integration to power systems is proposed. Based on the reinforcement model, new transmission lines are added to the network for eliminating the transmission network congestion. In addition, a methodology for determining the WFs optimal capacities, the economical WF lines transfer rates and the appropriate reinforcement plan, whereas maximising the total benefit using cost-reliability analysis is presented. In this way, the objective of the proposed optimisation problem has been divided into a master problem and two subproblems. Benders decomposition is employed to connect the master and subproblems of... 

    Impact of correlation on reserve requirements of high wind-penetrated power systems

    , Article International Journal of Electrical Power and Energy Systems ; Volume 73 , 2015 , Pages 576-583 ; 01420615 (ISSN) Riahinia, S ; Abbaspour, A ; Fotuhi Firuzabad, M ; Moeini Aghtaie, M ; Sharif University of Technology
    Elsevier Ltd  2015
    Abstract
    This paper investigates the effects of two important factors, i.e., correlation of wind farms output with load and wind speed coincidence in determining the required static reserve in a high wind-penetrated power system. To this end, it suggests an analytical approach to involve the effects of these two factors in probabilistic analytical multi-state models of wind farms output generation. Based on an optimization framework with the objective of reaching the desirable level of correlation, the key idea is to calculate some joint probabilities for equivalent models of wind farms. As a result, these models become compatible with the ones for conventional generation units in adequacy studies of... 

    An analytical framework for operational reliability studies of highly wind integrated power systems

    , Article 2016 International Conference on Probabilistic Methods Applied to Power Systems, PMAPS 2016 - Proceedings, 16 October 2016 through 20 October 2016 ; 2016 ; 9781509019700 (ISBN) Parvini, Z ; Abbaspour, A ; Fotuhi Firuzabad, M ; Moeini Aghtaie, M ; Sharif University of Technology
    Institute of Electrical and Electronics Engineers Inc  2016
    Abstract
    This paper presents a new framework for evaluating contribution of wind farms in operational reliability level of power systems. In this regard, at first, it provides a short-term analytical model well designed to represent intermittent and uncertain nature of wind power. Combining the attained multi-state model of wind farms with the other committed generating units, operational risk of the system is evaluated. The concept of Pennsylvania-New Jersey-Maryland (PJM), previously developed to assess the short-term/mid-term reliability of conventional generating units, is revisited in this paper to more practically incorporate wind farms in reliability studies of the power system. The proposed... 

    The mutual impact of demand response programs and renewable energies: a survey

    , Article Energies ; Volume 10, Issue 9 , 2017 ; 19961073 (ISSN) Hajibandeh, N ; Ehsan, M ; Soleymani, S ; Shafie Khah, M ; Catalão, J. P. S ; Sharif University of Technology
    Abstract
    Renewable energies as a solution for environmental issues have always been a key research area due to Demand Response Programs (DRPs). However, the intermittent nature of such energies may cause economic and technological challenges for Independent System Operators (ISOs) besides DRPs, since the acceptable effective solution may exceed the requirement of further investigations. Although, previous studies emphasized employing Demand Response and Renewable Energies in power systems, each problem was investigated independently, and there have been few studies which have investigated these problems simultaneously. In these recent studies, authors neither analyzed these problems simultaneously... 

    ATC enhancement using TCSC via artificial intelligent techniques

    , Article Electric Power Systems Research ; Volume 78, Issue 1 , 2008 , Pages 11-20 ; 03787796 (ISSN) Rashidinejad, M ; Farahmand, H ; Fotuhi Firuzabad, M ; Gharaveisi, A. A ; Sharif University of Technology
    2008
    Abstract
    Procurement of optimum available transfer capability (ATC) in the restructured electricity industry is a crucial challenge with regards to open access to transmission network. This paper presents an approach to determine the optimum location and optimum capacity of TCSC in order to improve ATC as well as voltage profile. Real genetic algorithm (RGA) associated with analytical hierarchy process (AHP) and fuzzy sets are implemented as a hybrid heuristic technique in this paper to optimize such a complicated problem. The effectiveness of the proposed methodology is examined through different case studies. © 2007 Elsevier B.V. All rights reserved  

    A conceptual structure for value based assessment of dynamic reactive power support in power markets

    , Article Electric Power Systems Research ; Volume 77, Issue 7 , 2007 , Pages 761-770 ; 03787796 (ISSN) Pirayesh, A ; Vakilian, M ; Feuillet, R ; Hadj Said, N ; Sharif University of Technology
    2007
    Abstract
    This paper presents a practical reactive power valuation method, for the purpose of the reactive power pricing, in which the VAr value is decomposed into two components. These components are basically different from those already employed in the literature. Using a security constrained optimization model, the proposed scheme allocates two specific amounts of MW transactions to each generator as a dynamic reactive power source. One of these allocated amounts represents the contribution of the VAr resource to the shipment of active power, while the other one represents the contribution to the protection of the system against voltage instability. The final VAr value is derived using the... 

    Optimal reactive power dispatch in a joint active / reactive market model

    , Article 2006 International Conference on Power System Technology, POWERCON2006, Chongqing, 22 October 2006 through 26 October 2006 ; 2006 ; 1424401119 (ISBN); 9781424401116 (ISBN) Mozafari, B ; Amraee, T ; Ranjbar, A. M ; Mirjafari, M ; Shirani, A. R ; Sharif University of Technology
    Institute of Electrical and Electronics Engineers Inc  2006
    Abstract
    The participants in auction-based electricity markets need to take part in a competition way which operates based on the concept of supply and demand theory to buy or sell the electricity. However, to have a feasible market solution, reactive power services are necessary to support the transmission of power from generation to end-users. This paper presents a methodology for optimal reactive power procurement, consistent with the auction-based electricity market mechanism. The proposed reactive power market is run in subsequence of the primary electricity market, allowing active power modification in light of available transmission capacity and reactive power resources. The IEEE 30-bus test... 

    Application of advanced SVC incase of reactive power and unbalancy compensation of a locomotive

    , Article 2006 IEEE International Conference on Industrial Technology, ICIT, Mumbai, 15 December 2006 through 17 December 2006 ; 2006 , Pages 1897-1902 ; 1424407265 (ISBN); 9781424407262 (ISBN) Saghaleini, M ; Hekmati, A ; Rezaei, M. R ; Afsharnia, S ; Sharif University of Technology
    2006
    Abstract
    This paper introduces advanced SVC. Advanced SVC has been simulated with regard to reactive power and unbalancy compensation. Then, a new space has been chosen for state equation based on combination of d-q and real space to positive - negative. By decoupling of active, reactive powers and positive, negative sequences and using decoupling circuit, the facility of each sequence control, by control circuit will be provided independently. After advanced SVC modeling, the load - which is electrification railway system - will be simulated. So a sample of electric locomotive in Iran has been investigated and simulated. By using the load model, the advanced SVC has been used for compensation of... 

    Grid modernization for enhancing the resilience, reliability, economics, sustainability, and security of electricity grid in an uncertain environment

    , Article Scientia Iranica ; Volume 23, Issue 6 , 2016 , Pages 2862-2873 ; 10263098 (ISSN) Shahidehpour, M ; Fotuhi Friuzabad, M ; Sharif University of Technology
    Sharif University of Technology  2016
    Abstract
    This paper reviews the merits of modernizing the power grid and discusses the way electric utilities in various countries are directing their practices toward offering enhanced sustainability, reliability, resilience, security, and economics to their respective consumers. The modernization of the electricity grid, which has evolved as the brainchild of electricity restructuring, has been made all the more urgent by the virtually pervasive dependence of modern lives on a reliable, clean, and secure supply of affordable electricity. The electric utility industry restructuring, which has staged many institutional, regulatory, and business models, has enabled the modern electricity grid to take... 

    Voltage regulation in private environments: opportunity or threat

    , Article IEEE Transactions on Power Delivery ; 2017 ; 08858977 (ISSN) Gharebaghi, S ; Safdarian, A ; Sharif University of Technology
    Institute of Electrical and Electronics Engineers Inc  2017
    Abstract
    Historically, the general target of affecting demand via voltage regulation was conservation, i.e., reducing peak demand and/or accumulated energy. In private environments however, profit maximization may take place of conservation, regardless of the social welfare and consumers' costs. This letter aims at highlighting the effectiveness of voltage regulation as a measure to maximize utilities' profit. The new strategy can indeliberately cause more payments for customers. The letter simulates different cases which reveal importance of the role regulatory bodies have to play to prevent unethical actions in private environments. IEEE