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Total 222 records

    On the use of pumped storage for wind energy maximization in transmission-constrained power systems

    , Article IEEE Transactions on Power Systems ; Vol. 30, issue. 2 , 2015 , p. 1017-1025 ; ISSN: 8858950 Hozouri, M. A ; Abbaspour, A ; Fotuhi-Firuzabad, M ; Moeini-Aghtaie, M ; Sharif University of Technology
    Abstract
    Owing to wind power inherent characteristics and technical constraints of power systems operation, a considerable amount of wind energy cannot be delivered to load centers and gets curtailed. Transmission congestion together with temporal mismatch between load and available wind power can be accounted as the main reasons for this unpleasant event. This paper aims to concentrate on the wind energy curtailment for which it provides a combinatorial planning model to maximize wind power utilization. Jointly operating the wind power generation system with pumped hydro energy storage (PHES), the planning procedure tries to reach schemes with the minimum level of wind energy curtailment as well as... 

    Toward a comprehensive model of large-scale dfig-based wind farms in adequacy assessment of power systems

    , Article IEEE Transactions on Sustainable Energy ; Vol. 5, issue. 1 , 2014 , p. 55-63 ; ISSN: 19493029 Ghaedi, A ; Abbaspour, A ; Fotuhi-Firuzabad, M ; Moeini-Aghtaie, M ; Sharif University of Technology
    Abstract
    With the current focus on energy and environment, efficient integration of renewable energies, especially wind energy into power systems, is becoming essential. Furthermore, to fully capture wind potentials and to recognize the unique characteristics associated with wind energy in power systems adequacy analysis, a profound inquiry is required. In this way, this paper tries to establish a comprehensive analytical approach for reliability modeling of doubly-fed induction generator (DFIG)-based wind farms. First, the most impressive components of wind turbines are introduced. It then continues with integrating developed state space model of wind turbines and their production uncertainties,... 

    Multiagent genetic algorithm: An online probabilistic view on economic dispatch of energy hubs constrained by wind availability

    , Article IEEE Transactions on Sustainable Energy ; Vol. 5, issue. 2 , 2014 , p. 699-708 ; ISSN: 19493029 Moeini-Aghtaie, M ; Dehghanian, P ; Fotuhi-Firuzabad, M ; Abbaspour, A ; Sharif University of Technology
    Abstract
    Multiple energy carriers (MECs) have been broadly engrossing power system planners and operators toward a modern standpoint in power system studies. Energy hub, though playing an undeniable role as the intermediate in implementing the MECs, still needs to be put under examination in both modeling and operating concerns. Since wind power continues to be one of the fastest-growing energy resources worldwide, its intrinsic challenges should be also treated as an element of crucial role in the vision of future energy networks. In response, this paper aims to concentrate on the online economic dispatch (ED) of MECs for which it provides a probabilistic ED optimization model. The presented model... 

    Reliability evaluation of a composite power system containing wind and solar generation

    , Article Proceedings of the 2013 IEEE 7th International Power Engineering and Optimization Conference, PEOCO 2013 ; 2013 , p. 483-488 ; ISBN: 9781470000000 Ghaedi, A ; Abbaspour, A ; Fotuhi-Firuzabad, M ; Moeini-Aghtaie, M ; Othman, M ; Sharif University of Technology
    Abstract
    Variability and uncertainty of wind and photovoltaic (PV) generations greatly influence technical and financial aspects of power systems. This paper examines the potential impacts of large-scale wind and PV farms on reliability level of composite generation and transmission systems. At first, reliability models of renewable-based units are developed. In these models, both component failure rates and uncertainty nature of renewable resources are taken into account. Using the proposed technique, the multi-state analytical models of a wind farm placed in Manjil and a PV farm placed in Jask both in Iran are extracted. Then, reliability studies of high renewable-energies penetrated power system... 

    Integrating load reduction into wholesale energy market with application to wind power integration

    , Article IEEE Systems Journal ; Vol. 6, issue. 1 , 2012 , p. 35-45 ; ISSN: 19328184 Parvania, M ; Fotuhi-Firuzabad, M ; Sharif University of Technology
    Abstract
    Renewable energy resources, notably wind power, are expected to provide considerable portion of the world energy requirements in the near future. Many system operators around the world are challenged by the problems associated with integrating these intermittent resources into the grid. As one of the potential solutions, demand response (DR) is expected to play a major role for mitigating integration issues of intermittent renewable energy resources. In this context, this paper proposes a DR program which helps to integrate wind power by reshaping the load of the system. The DR program provides a framework to procure load reduction from DR resources in the wholesale energy market. The... 

    Incorporating large-scale distant wind farms in probabilistic transmission expansion planning-part II: Case studies

    , Article IEEE Transactions on Power Systems ; Vol. 27, issue. 3 , 2012 , p. 1594-1601 ; ISSN: 08858950 Moeini-Aghtaie, M ; Abbaspour, A ; Fotuhi-Firuzabad, M ; Sharif University of Technology
    Abstract
    This paper is the second part of a two-paper set which comprehensively sets forth an innovative approach in transmission grid reinforcement studies in the presence of wind energy. Part I thoroughly defined the theory and algorithms. Here, to trace the feasibility of the proposed algorithm, three different case studies are implemented on the 24-Bus IEEE Reliability Test System (IEEE-RTS). The optimal solutions in Pareto fronts of different cases are reached, analyzed, and the final solution (optimal plan) of each case is obtained using the fuzzy decision making method. Moreover, in order to analyze the effects of variations in the large-scale wind farm generation on the transmission expansion... 

    Incorporating large-scale distant wind farms in probabilistic transmission expansion planning-part I: Theory and algorithm

    , Article IEEE Transactions on Power Systems ; Vol. 27, issue. 3 , 2012 , p. 1585-1593 ; ISSN: 08858950 Moeini-Aghtaie, M ; Abbaspour, A ; Fotuhi-Firuzabad, M ; Sharif University of Technology
    Abstract
    With increment in the penetration of wind energy in power systems, the necessity of considering its impacts on transmission expansion planning (TEP) studies, especially for large scale wind farms, is inevitable. A new multi-objective (MO) optimization transmission expansion planning algorithm considering wind farm generation is presented in this two-paper set. Part I is mainly devoted to derivation of the theory and algorithm. The objective functions used in the TEP studies take into account investment cost, risk cost and congestion cost. The combination of Monte Carlo simulation (MCS) and Point Estimation Method (PEM) is implemented to investigate the effects of network uncertainties. Due... 

    Integration of large-scale wind farm projects including system reliability analysis

    , Article IET Renewable Power Generation ; Vol. 5, issue. 1 , 2011 , p. 89-98 ; ISSN: 17521416 Salehi-Dobakhshari, A ; Fotuhi-Firuzabad, M ; Sharif University of Technology
    Abstract
    This study intends to develop a comprehensive procedure for evaluating locational value of a wind farm project incorporating reduction in transmission system losses, load delivery point interruption cost and operating cost of generating units. The energy extracted from the wind farm in normal operation condition is considered to replace the energy from fossil-fueled conventional units. In addition, composite system reliability analysis in the presence of wind power is carried out to evaluate total costs associated with curtailed energy at different load points as well as generation of generating units in contingency conditions. System reliability analysis related to large-scale wind farms,... 

    Corrective voltage control scheme considering demand response and stochastic wind power

    , Article IEEE Transactions on Power Systems ; Vol. 29, issue. 6 , 2014 , pp. 2965-2973 ; ISSN: 08858950 Rabiee, A ; Soroudi, A ; Mohammadi-Ivatloo, B ; Parniani, M ; Sharif University of Technology
    Abstract
    This paper proposes a new approach for corrective voltage control (CVC) of power systems in presence of uncertain wind power generation and demand values. The CVC framework deals with the condition that a power system encounters voltage instability as a result of severe contingencies. The uncertainty of wind power generation and demand values is handled using a scenario-based modeling approach. One of the features of the proposed methodology is to consider participation of demand-side resources as an effective control facility that reduces control costs. Active and reactive redispatch of generating units and involuntary load curtailment are employed along with the voluntary demand-side... 

    Multi criteria site selection model for wind-compressed air energy storage power plants in Iran

    , Article Renewable and Sustainable Energy Reviews ; Vol. 32 , April , 2014 , pp. 579-590 ; ISSN: 13640321 Satkin, M ; Noorollahi, Y ; Abbaspour, M ; Yousefi, H ; Sharif University of Technology
    Abstract
    In this research, a site selection method for wind-compressed air energy storage (wind-CAES) power plants was developed and Iran was selected as a case study for modeling. The parameters delineated criteria for potential wind development localities for wind-CAES power plant sites. One important consequence of this research was the identification of the wind energy potential for wind-CAES sites. The theoretical wind energy potential of Iran of greater than 50 W/m2 was identified from a wind atlas of Iran. The model produced factor maps by considering the boundary conditions of the input data and created geo-databases from the outputs maps. The main factor maps were electrical grids and... 

    Investigation of core loss effect on steady-state characteristics of inverter fed brushless doubly fed machines

    , Article IEEE Transactions on Energy Conversion ; Volume 29, Issue 1 , March , 2014 , Pages 57-64 ; ISSN: 08858969 Hashemnia, M. N ; Tahami, F ; Oyarbide, E ; Sharif University of Technology
    Abstract
    Brushless doubly fed machine (BDFM) shows promising results for wind power and adjustable-speed drive applications. Due to poor rotor magnetic coupling and relatively high value of slip, core loss is an important factor which can affect the steady-state and dynamic performance of BDFM. Specifically, core loss plays a major role when evaluating the efficiency of the machine. By now, there is no comprehensive study on core loss effect on performance characteristics of BDFM in the literature. In this paper, based on the derived relations and applying transformation of parameters from one winding to another one, the steady-state equivalent circuit model of BDFM without core loss is modified in... 

    Performance of a standalone wind-hydrogen power system for regions with seasonal wind profile: A case study in Khaf region

    , Article Sustainable Energy Technologies and Assessments ; Vol. 7 , September , 2014 , pp. 265-278 ; ISSN: 22131388 Ahmadi, S ; Rezaei Mirghaed, M ; Roshandel, R ; Sharif University of Technology
    Abstract
    The present study was aimed at performance and energy analysis of a hybrid wind-hydrogen power system. Such system consists of wind turbines, batteries for the short time energy storage, electrolyzer, fuel cell and hydrogen tank for long time energy storage. The proposed configuration is used to supply energy demand of a region with discrete seasonal wind speed regime. Temporary wind energy profiles restrict using batteries for electricity storage as they lose much electrical stored energy for the long time. Based on direct wind turbine usage, batteries and hydrogen storage, different energy supply strategies are introduced and analyzed to power the household electricity demand. The energy... 

    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... 

    Toward a comprehensive model of large-scale dfig-based wind farms in adequacy assessment of power systems

    , Article IEEE Transactions on Sustainable Energy ; Vol. 5, issue. 1 , 2014 , p. 55-63 Ghaedi, A ; Abbaspour, A ; Fotuhi-Firuzabad, M ; Moeini-Aghtaie, M ; Sharif University of Technology
    Abstract
    With the current focus on energy and environment, efficient integration of renewable energies, especially wind energy into power systems, is becoming essential. Furthermore, to fully capture wind potentials and to recognize the unique characteristics associated with wind energy in power systems adequacy analysis, a profound inquiry is required. In this way, this paper tries to establish a comprehensive analytical approach for reliability modeling of doubly-fed induction generator (DFIG)-based wind farms. First, the most impressive components of wind turbines are introduced. It then continues with integrating developed state space model of wind turbines and their production uncertainties,... 

    Dynamic behavior of a tension leg platform offshore wind turbine under environmental loads

    , Article Scientia Iranica ; Vol. 21, issue. 3 , 2014 , pp. 480-491 ; ISSN : 1026-3098 Ebrahimi, A ; Abbaspour, M ; Nasiri, R. M ; Sharif University of Technology
    Abstract
    In order to evaluate the dynamic behavior of floating offshore wind turbines, the authors consider two approaches. A numerical method is used to investigate Tension Leg Platform (TLP) offshore wind turbine response behavior under a parked condition. This code considers nonlinearities due to changes in the tension of tethers. The off-diagonal components of stiffness, damping and mass matrices are considered to calculate coupling. This code solves the nonlinear equation of motion at each time step. However, in order to validate the data generated by the code, a scaled-down model was fully tested in the marine laboratory. The importance of these series of experiments is due to the fact that... 

    Development of a zero emission integrated system for co-production of electricity and methanol through renewable hydrogen and CO 2 capture

    , Article International Journal of Greenhouse Gas Control ; Volume 7 , 2012 , Pages 145-152 ; 17505836 (ISSN) Soltanieh, M ; Azar, K. M ; Saber, M ; Sharif University of Technology
    Abstract
    In order to decrease CO 2 emission into the atmosphere and develop renewable energy sources for carbon capture, an integrated system is considered for co-production of electricity and methanol. In this research, methanol synthesis unit through captured CO 2 from fossil fuel power plant and produced H 2 from water electrolysis unit by wind renewable energy is developed. An oxy-fuel combustion carbon capture method is considered in large scale Matiant power plant based on utilization of oxygen from water electrolysis unit. Technical and economical analysis of the proposed system shows that when the price of natural gas is 7.8US$/GJ, the total CO 2 avoided cost is 93US$/(tonne of CO 2) and... 

    Incorporating large-scale distant wind farms in probabilistic transmission expansion planning-part I: Theory and algorithm

    , Article IEEE Transactions on Power Systems ; Volume 27, Issue 3 , July , 2012 , Pages 1585-1593 ; 08858950 (ISSN) Moeini Aghtaie, M ; Abbaspour, A ; Fotuhi Firuzabad, M ; Sharif University of Technology
    Abstract
    With increment in the penetration of wind energy in power systems, the necessity of considering its impacts on transmission expansion planning (TEP) studies, especially for large scale wind farms, is inevitable. A new multi-objective (MO) optimization transmission expansion planning algorithm considering wind farm generation is presented in this two-paper set. Part I is mainly devoted to derivation of the theory and algorithm. The objective functions used in the TEP studies take into account investment cost, risk cost and congestion cost. The combination of Monte Carlo simulation (MCS) and Point Estimation Method (PEM) is implemented to investigate the effects of network uncertainties. Due... 

    Five-leg converter topology for wind energy conversion system with doubly fed induction generator

    , Article Renewable Energy ; Volume 36, Issue 11 , 2011 , Pages 3187-3194 ; 09601481 (ISSN) Shahbazi, M ; Poure, P ; Saadate, S ; Zolghadri, M. R ; Sharif University of Technology
    Abstract
    In this paper, application of a five-leg converter in Doubly Fed Induction Generator (DFIG) for Wind Energy Conversion Systems (WECS) is investigated. The five-leg structure and its PWM control are studied and performances are compared with the classical six-leg topology. The main drawback of five-leg converter with respect to the six-leg back-to-back converter is the need to increase the dc-link voltage for the same operation point, i.e. the same powers in case of WECS. So, different methods for the reduction of the required dc-link voltage in the five-leg case are studied. The five-leg converter is used to replace the conventional six-leg one, with the same ability. For the performance... 

    Wind energy status of Iran: Evaluating Iran's technological capability in manufacturing wind turbines

    , Article Renewable and Sustainable Energy Reviews ; Volume 15, Issue 8 , 2011 , Pages 4200-4211 ; 13640321 (ISSN) Bagheri Moghaddam, N ; Mousavi, S. M ; Nasiri, M ; Moallemi, E. A ; Yousefdehi, H ; Sharif University of Technology
    Abstract
    Iran, as a developing country, will be confronted with a significant increase in electricity demand in future years. Being a petroleum producing country has resulted in extreme subsidies for energy production from fossilized resources such as oil and gas. This issue is one of the most important factors regarding underdevelopment of renewable energies in Iran. Expansive use of fossil resources in providing the necessary energy has resulted in Iran being among the 20 countries that have a share in the 75% spread of greenhouse gases. This issue has resulted in greater attention on behalf of the energy sectors policy makers regarding renewable energies, especially wind. Awareness regarding the... 

    Interval type-2 fuzzy modeling of wind power generation in Genco's generation scheduling

    , Article Electric Power Systems Research ; Volume 81, Issue 8 , 2011 , Pages 1696-1708 ; 03787796 (ISSN) Siahkali, H ; Vakilian, M ; Sharif University of Technology
    Abstract
    Wind power is a promising source of electric power generation since it has tremendous environmental and social benefits. The generation scheduling (GS) problem encounters several uncertainties in terms of the system's parameters such as load, reserve and available wind power generation. The modeling of those uncertainties is an important issue in power system scheduling. A fuzzy based modeling approach can be used to develop the generation schedule under an uncertain environment. In this paper, the type-2 fuzzy membership function (MF) is implemented to model the linguistic uncertainty of type-1 MF of available wind power generation which stems from opinions of different experts. The...