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    Transmission Expansion Planning in Deregulated Environments

    , Ph.D. Dissertation Sharif University of Technology Maghouli, Pouria (Author) ; Hosseini, Hamid (Supervisor) ; Oloomi Buygi, Majid (Co-Advisor) ; Shahidehpour, Mohamad (Co-Advisor)
    Abstract
    This study presents a multi-objective optimization framework for transmission expansion planning in restructured electricity markets under uncertainty considerations. Deregulation of power system has introduced new objectives and requirements for transmission expansion planning problem. Also, the unbundling of electricity industry introduced new uncertainties and escalated the existing ones in network planning. Under these circumstances there is an emerging need for new planning models to cope with restructured electricity industry requirements.The conventional least-cost approaches which represent the transmission expansion planning as a single objective optimization problem could not... 

    Developing a Simulator for Concurrent Execution of Multiple Workflows in Fog Computing Environment

    , M.Sc. Thesis Sharif University of Technology Rayej, Mohamad Amin (Author) ; Izadi, Mohamad (Supervisor)
    Abstract
    Fog computing environment consists of several devices which distribute across an arbitrary topology. Each of these devices is capable of carrying out a designated computation simultaneously with other devices. One of the common ways of describing a computation is through the usage of workflows. Workflow is a flexible and formal way of modeling tasks and their requirements for execution. A workflow is essentially a DAG. Therefore, it can model the data dependency between tasks quite accurately. The complex structure of a workflow in conjunction with the homogenous nature of devices in a fog environment makes it difficult to find a resource management algorithm to minimize execution time, used... 

    Investigation of the Drop Tank Influence on Range and Optimization of Its Geometry

    , M.Sc. Thesis Sharif University of Technology Nasiri Khansari, Mohamad Tagi (Author) ; Durali, Mohamad (Supervisor)
    Abstract
    This project focuses on the design of fuel drop tanks for airplanes that add minimal drag and positive lift to the flying object. This will obviously effect the stability and dynamic performance of the airplane. To reduce adverse dynamic effects the tank was divided to several segment with a special emptying sequence. The add-on tank has to have no interference with the object existing systems and require minimum structural changes in the object. Several designs were proposed and the one gaining highest marks was selected. The flow field and the dynamic behavior of combined vehicle and drop tanks were studied using FE simulations. The result shows that adding a drop tank with optimized... 

    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... 

    A Stochastic Model for Cancer Tumor Growth

    , M.Sc. Thesis Sharif University of Technology Miraboutalebi, Mohamad Hosein (Author) ; Foroughmand Arabi, Mohamad Hadi (Supervisor) ; Alishahi, Kasra (Co-Supervisor)
    Abstract
    Cancer can be defined as a stochastic phenomenon. Thus, the tumor growth can be defined as a stochastic process. A Cancer tumor can be analyzed by its geometric shape. Furthermore, computing fractal dimension of shapes is a useful technique to analyze chaosity and complexity of shapes. This approach can be used to compare results from laboratory with simulated results of a mathematical model. A stochastic model of tumor growth will be presented. And some geometrical properties will be analyzed through computer simulation of the model  

    A Biomechanical Model for Evaluation of Shoulder Function: Detecting the
    Relationship Between Muscles Activation Patterns and Shoulder Joint Torques Using Synergy Concept

    , M.Sc. Thesis Sharif University of Technology Nassajian Moghadam, Mohamad Reza (Author) ; Parnianpour, Mohamad (Supervisor) ; Asghari, Mohsen (Supervisor)
    Abstract
    The effects of combined task demands on the way muscles are recruited to balance external loads during posture and movement is of great importance in quantitative analysis of upper arm function. Pain and disability of shoulder joint is becoming more important as population spends more often interacting with computers in seated position and carrying repetitive tasks using upper extremities. Shoulder joint that is more dependent on the muscles for its normal function than other joints such as hip due to its small articular surface and large range motion has been used here to study its coordination during isometric exertions. Since, the numbers of tasks that could be performed are enormous. In... 

    ISO's optimal strategies for scheduling the hourly demand response in day-ahead markets

    , Article IEEE Transactions on Power Systems ; Vol. 29, issue. 6 , 2014 , p. 2636-2645 ; ISSN: 8858950 Parvania, M ; Fotuhi-Firuzabad, M ; Shahidehpour, M ; Sharif University of Technology
    2014
    Abstract
    This paper presents a hierarchical demand response (DR) bidding framework in the day-ahead energy markets which integrates customer DR preferences and characteristics in the ISO's market clearing process. In the proposed framework, load aggregators submit aggregated DR offers to the ISO which would centrally optimize final decisions on aggregators' DR contributions in wholesale markets. The hourly load reduction strategies include load shifting and curtailment and the use of onsite generation and energy storage systems. The ISO applies mixed-integer linear programming (MILP) to the solution of the proposed DR model in the day-ahead market clearing problem. The proposed model is implemented... 

    Comparative hourly scheduling of centralized and distributed storage in day-ahead markets

    , Article IEEE Transactions on Sustainable Energy ; Vol. 5, issue. 3 , 2014 , p. 729-737 ; ISSN: 19493029 Parvania, M ; Fotuhi-Firuzabad, M ; Shahidehpour, M ; Sharif University of Technology
    2014
    Abstract
    Electric energy storage (EES) installations in power systems are migrating from large centralized systems to more distributed installations for microgrid applications. This trend signifies modular EES installations for the local control of buildings and processes. A centralized EES system is often dispatched by grid operators for increasing the overall efficiency and enhancing the security of power systems. The distributed EES (DEES) is locally managed by aggregators to maximize the local impact of EES, before the aggregators' adjusted load profiles are submitted to grid operators for the day-ahead scheduling. In this paper, we present and analyze two models for the hourly scheduling of... 

    Optimal demand response aggregation in wholesale electricity markets

    , Article IEEE Transactions on Smart Grid ; Vol. 4, issue. 4 , 2013 , p. 1957-1965 ; ISSN: 19493053 Parvania, M ; Fotuhi-Firuzabad, M ; Shahidehpour, M ; Sharif University of Technology
    2013
    Abstract
    Advancements in smart grid technologies have made it possible to apply various options and strategies for the optimization of demand response (DR) in electricity markets. DR aggregation would accumulate potential DR schedules and constraints offered by small- and medium-sized customers for the participation in wholesale electricity markets. Despite various advantages offered by the hourly DR in electricity markets, practical market tools that can optimize the economic options available to DR aggregators and market participants are not readily attainable. In this context, this paper presents an optimization framework for the DR aggregation in wholesale electricity markets. The proposed study... 

    Demand response participation in wholesale energy markets

    , Article IEEE Power and Energy Society General Meeting ; 2012 ; ISSN: 19449925 ; ISBN: 9781470000000 Parvania, M ; Fotuhi-Firuzabad, M ; Shahidehpour, M ; Sharif University of Technology
    2012
    Abstract
    This paper summarizes a presentation to be given at the IEEE Power and Energy Society 2012 General Meeting, in the panel session Demand response: analytics, practice, and challenges in smart grid environment. The paper elaborates participation of demand response (DR) resources in electricity markets. Specially, different types of DR participation in the wholesale energy markets are discussed. Then, two DR program designs are presented which aim to enable customers' participation in day-ahead energy markets. The paper continues with presenting the modified structure of the day-ahead energy market in presence of the DR programs. The offer packages specifically designed for DR participation in... 

    Optimal demand response aggregation in wholesale electricity markets

    , Article IEEE Transactions on Smart Grid ; Volume 4, Issue 4 , 2013 , Pages 1957-1965 ; 19493053 (ISSN) Parvania, M ; Fotuhi Firuzabad, M ; Shahidehpour, M ; Sharif University of Technology
    2013
    Abstract
    Advancements in smart grid technologies have made it possible to apply various options and strategies for the optimization of demand response (DR) in electricity markets. DR aggregation would accumulate potential DR schedules and constraints offered by small- and medium-sized customers for the participation in wholesale electricity markets. Despite various advantages offered by the hourly DR in electricity markets, practical market tools that can optimize the economic options available to DR aggregators and market participants are not readily attainable. In this context, this paper presents an optimization framework for the DR aggregation in wholesale electricity markets. The proposed study... 

    Assessing impact of demand response in emission-constrained environments

    , Article IEEE Power and Energy Society General Meeting, 24 July 2011 through 28 July 2011, Detroit, MI ; 2011 ; 19449925 (ISSN) ; 9781457710018 (ISBN) Parvania, M ; Fotuhi Firuzabad, M ; Shahidehpour, M ; Sharif University of Technology
    2011
    Abstract
    Reducing the emissions produced by the electric power production may be one of the most challenging problems of the electricity sector in the coming future. As one of the potential solutions, demand response (DR) can play an important role to reduce emissions and costs associated with emission reduction activities. This paper aims to assess the short-term impacts of running a DR program on a power system constrained by emissions caps. The DR program is designed to procure operating reserve from demand-side participants. A day-ahead network-constrained market clearing model with emission cap constraints is used as the assessment tool, where the DR program participants along with generating... 

    Unit commitment with probabilistic spinning reserve and interruptible load considerations

    , Article IEEE Transactions on Power Systems ; Volume 24, Issue 1 , 2009 , Pages 388-397 ; 08858950 (ISSN) Aminifar, F ; Fotuhi Firuzabad, M ; Shahidehpour, M ; Sharif University of Technology
    2009
    Abstract
    This paper demonstrates how a probabilistic criterion could be explicitly integrated in the unit commitment (UC) formulation. Both spinning reserve and interruptible load are taken into account as the operating reserve facilities. Incorporating the interruption notice time of interruptible load involves some complexities in the evaluation procedure and problem formulation which is considered in this paper. The expected energy not supplied (EENS) is considered as a probabilistic criterion and a new method is proposed to calculate this index in the presence of interruptible load. The reliability-constrained unit commitment (RCUC) problem is formulated based on the mixed-integer programming... 

    Optimal transactive market operations with distribution system operators

    , Article IEEE Transactions on Smart Grid ; 2017 ; 19493053 (ISSN) Kabiri Renani, Y ; Ehsan, M ; Shahidehpour, M ; Sharif University of Technology
    2017
    Abstract
    Distribution system operator (DSO) has traditionally been responsible for the reliable operation of power distribution systems. The advent of distributed energy resources (DERs) and microgrids in distribution networks has required a new platform for DSOs. The new DSO, which is for the most part an independent agent, is responsible for aggregating a widely dispersed DERs (which include small thermal generation units, energy storage, and demand response) and flexible loads in electricity markets. DSO coordinates and balances the transactive dispatch of supply and demand at the distribution level and links wholesale and retail electricity markets. In this paper, a framework for the day-ahead... 

    Optimal transactive market operations with distribution system operators

    , Article IEEE Transactions on Smart Grid ; Volume 9, Issue 6 , 2018 , Pages 6692-6701 ; 19493053 (ISSN) Kabiri Renani, Y ; Ehsan, M ; Shahidehpour, M ; Sharif University of Technology
    Institute of Electrical and Electronics Engineers Inc  2018
    Abstract
    Distribution system operator (DSO) has traditionally been responsible for the reliable operation of power distribution systems. The advent of distributed energy resources (DERs) and microgrids in distribution networks has required a new platform for DSOs. The new DSO, which is for the most part an independent agent, is responsible for aggregating a widely dispersed DERs (which include small thermal generation units, energy storage, and demand response) and flexible loads in electricity markets. DSO coordinates and balances the transactive dispatch of supply and demand at the distribution level and links wholesale and retail electricity markets. In this paper, a framework for the day-ahead... 

    Day-ahead self-scheduling of a transmission-constrained GenCo with variable generation units using the incomplete market information

    , Article IEEE Transactions on Sustainable Energy ; Volume 8, Issue 3 , 2017 , Pages 1260-1268 ; 19493029 (ISSN) Kabiri Renani, Y ; Ehsan, M ; Shahidehpour, M ; Sharif University of Technology
    2017
    Abstract
    In this paper, a self-generation scheduling method for a power generation company (GenCo) with renewable generation units is presented. In the proposed method, locational market prices (LMPs) are calculated using the incomplete information on competing market participants by simulating the ISO's market clearing program and considering the effect of physical limitations of transmission lines. The errors associated with forecasted LMP and renewable production are modeled in the GenCo's generation scheduling using a robust optimization approach. The scheduling problem is modeled as a mixed-integer linear programming which is solved by a CPLEX solver in GAMS. An eight-bus system is employed to... 

    Experimental Study of Fuel Concentration Fluctuations on Diffusion Flame Structure

    , M.Sc. Thesis Sharif University of Technology Fathieh, Farhad (Author) ; Farshchi, Mohamad (Supervisor)
    Abstract
    In the present study, the axisymmetric liquid gas/air diffusion flame in the presence of fuel concentration oscillations and velocity perturbations has been investigated experimentally. Several industrial combustions take a place by diffusion mechanism which necessitate scientists to make far better understanding of diffusion flames. In order to study diffusion flames, the instrument with two separated lines of fuel and air has been developed. Nitrogen is used for fuel dilution oscillatory with pulse of 1, 2, and 4 Hz frequencies. The pulse duration effects on flame structure are also studied. The flame shape has been captured by high speed camera and the results are processed by image... 

    Investigation and Synthesis of Zn-Ni-Mn Three Cationic Electrophosphate Coating

    , M.Sc. Thesis Sharif University of Technology Alimi, Zahra (Author) ; Ghorbani, Mohamad (Supervisor)
    Abstract
    The purpose of this study was to create a three-cationic electro phosphate coating of zinc-nickel-manganese by cathodic method and to investigate the effect of operating variables on the properties of zinc-nickel-manganese tri-cationic electro phosphate coating. Hence, the effects of variables such as coating acidity, coating thickness, coating temperature, coating time and concentration of manganese were studied in the bath on the properties such as coating morphology, corrosion resistance, coating thickness. Coating morphology was characterized by scanning electron microscopy and corrosion resistance by polarization test. The pH values of 1.4, 1.8, 2 and 2.2 were selected, and the results... 

    Experimental Study on a Non-Premixed Swirl-Stabilized Burner

    , M.Sc. Thesis Sharif University of Technology Mosadegh, Sepehr (Author) ; Farshchi, Mohamad (Supervisor)
    Abstract
    Burner scaling criteria have been studied and the most appropriate one has been selected to scale down a large industrial burner. The sub-scaled non-premixed swirl-stabilized burner is manufactured to ensure that the available experimental setup and equipment are sufficient and practical for characterizing the burner. The aim of the research is to assist the future design optimization with the identifications which have been done. The constant residence time method is selected in this project and it is shown that this is the proper criteria for non-premixed and swirl-stabilized burners. For better identification, stability maps of the flame are extracted with the experimental methodology for... 

    Laboratory and Numerical Study of External Corrosion Effect on the Integrity of Sea Pipelines

    , M.Sc. Thesis Sharif University of Technology Afzalimir, Hamidreza (Author) ; Raie, Mohamad (Supervisor)
    Abstract
    This research evaluates the effect of external corrosion geometry and bending moment on the burst pressure of pipes. In recent decades, the use of natural resources of offshore oil and gas has increased, as a result, the use of offshore pipelines for transferring products has grown dramatically. At the same time, numerous accidents and explosions in offshore pipelines and its economic and environmental consequences indicates the importance of ensuring safe operation. Pipeline Integrity Management has been developed to ensure safe and efficient operation of pipelines. Integrity management includes planning, inspection, evaluation and repair. This cycle is checked continuously. The importance...