Predicting Wind Turbine Failures using Machine Learning

, M.Sc. Thesis Sharif University of Technology Ahmadi, Mohsen (Author) ; Abasspour Tehranifard, Ali (Supervisor) ; Fatemizadeh, Emad (Supervisor)

Abstract

Nowadays, the development of renewable energy sources is in line with the increasing capacity and installation of wind energy resources. Wind turbines, due to their installation in harsh areas, have high maintenance and repair costs, which is one of the main challenges for their further development. Given the high costs of repairs, predicting faults and planning for optimal maintenance can optimize performance and extend the useful life of the turbine. The aim of this research is to provide an approach to predict faults in wind turbines using data from the control and monitoring system. This data includes various parameters such as wind speed, output power, temperature of the generator...

Determination of Eddy Current Losses in Power Transformer Tank and Analysis of Methods for Reduction of These Losses

, M.Sc. Thesis Sharif University of Technology Motalleb, Mehdi (Author) ; Abbaspour Tehranifard, Ali (Supervisor) ; Vakilian, Mehdi (Supervisor)

Abstract

The leads with heavy current passing through the covering plates, and the winding in a transformer, are sources of eddy current losses. Due to this loss some regions of tank wall are subject to serious local overheating. It affects the safety and reliability of this expensive bject and power delivery.Heavy current in large power transformers and special type transformers give rise to a concentrated passage of eddy currents which in turn cause high local losses and overheating in the metallic parts especially in the steel tank walls of transformer.This local overheating is dangerous for transformer oil and the solid insulations. Therefore the calculation of losses and proper design of...

Developing a New Framework for Expansion Studies of Energy Storage Systems Considering Reconfiguration Capability of Network

, M.Sc. Thesis Sharif University of Technology Mehrabi, Mohammad (Author) ; Abbaspour Tehranifard, Ali (Supervisor) ; Moeini, Moein (Supervisor)

Abstract

Proliferation of distributed energy resources and the developing of smart grid concepts are of a great importance. This, however, influences the future of power systems and necessitates more studies in order to cope with the changes. In this regard, uncontrollability issues are arised by introducing the renewable energy resources in the power systems. To address this issue, energy storage systems are used to mitigate negative consequences of using renewable energy resources. Accordingly, in this thesis, a new framework for determining the capacity and location of the energy storage systems is proposed. In addition, reconfiguration of distribution network is also concerned in order to...

Red Tide Development Modelling by MIKE Software (in Persian Gulf)

, M.Sc. Thesis Sharif University of Technology Zohdi, Elahe (Author) ; Abasspour, Majid (Supervisor)

Abstract

Land sourced marine pollution, overexploitation of living marine resources, destruction of habitat and introduction of harmful aquatic organisms and pathogens to new environment had been identified as the four greatest threats to the world’s oceans. Since invasive species can not be cleaned or absorbed in the ocean so, their effects on the environment are irreversible. Red tide is one of the invasive spieces and is a colloquial term used to refer to one of a variety of natural phenomena known as algal bloom. This phenomenon occur in estuarine, marine, or fresh water and algae accumulate rapidly in the water column and resulting in coloration of the surface water, varying in colour normally...

Operation Reserve Determination in a Power System Containing Renewable Generation

, Ph.D. Dissertation Sharif University of Technology Ghaedi, Amir (Author) ; Abbaspour Tehranifard, Ali (Supervisor) ; Fotouhi Firouzabad, Mahmoud (Co-Advisor)

Abstract

Renewable energy resources, e.g. wind, solar and geothermal, experience rapid progresses in electric power industry all over the world. So, it becomes essential that these free-emission electrical energy resources be integrated in the existing generating capacity planning procedures. On the other hand, the uncertain and intermittent nature of these energies has led to some problems in their integration in power systems. The reserve requirement in a renewable-based power system is a main challenge, which has to be addressed properly. In this way, this research presents an analytical approach, based on the modified PJM method, to quantify the risk of renewable energies commitment during the...

Proposing a Profit-Based Strategy for Optimal Energy Management at Electric Vehicles’ Public Parking Decks

, M.Sc. Thesis Sharif University of Technology Zarei, Alireza (Author) ; Abbaspour Tehranifard, Ali (Supervisor) ; Fotuhi-Firuzabad, Mahmud (Co-Advisor)

Abstract

Over the last few years, several economical and environmental reasons have caused many countries throughout the world to plan to replace conventional gasoline vehicles with different types of electric vehicles, and hence, it is anticipated that using these vehicles will quickly be developed in near future. Widespread use of electric vehicles calls for a comprehensive network of easily accessible charging stations being capable of replenishing their batteries. In this regard, municipal public parking decks, because of their characteristics, can be considered as proper candidates for installing charging equipment. However, as a large number of electric vehicles can be parked at a public...

A Novel Methodology for Reserve and Energy Scheduling Incorporating Vpps in High Penetration of Renewable Resources

, M.Sc. Thesis Sharif University of Technology Zarrin, Arman (Author) ; Abbaspour Tehranifard, Ali (Supervisor) ; Fotuhi Firozabad, Mahmoud (Supervisor)

Abstract

Considering the high penetration of renewable energy resources in modern power systems, independent system operator faces considerable uncertainty and variability in the system under supervision. In this regard, determining and providing the appropriate amount of operational reserve is critical to overcoming uncertainty and variability to have reliable system performance. In practice, power system operators prefer to use deterministic approaches to schedule operational reserve. Such approaches have benefits in simplicity and fast calculations. Nevertheless, increasing share of renewable resources causes a considerable error in these approaches. Therefore, many researchers have proposed...

Designing a Reward-Penalty Scheme to Improve Technical Performance of Distribution System Employing Distributed Generation (DG) Resources

, M.Sc. Thesis Sharif University of Technology Jooshaki, Mohammad (Author) ; Abbaspour Tehranifard, Ali (Supervisor) ; Fotuhi Firuzabad, Mahmud (Supervisor)

Abstract

Reward-penalty schemes are known as the most effective tools to regulate the service quality. This thesis tries to design a comprehensive reward-penalty scheme to properly motivate electricity distribution companies (DisCos) to improve the reliability and reduce the energy losses in their networks using Distributed Generation (DG) Resources. So, as the first step, the designing methods of reward-penalty scheme (RPS) and their advantage and disadvantages are introduced, and also a method based on concept of the Yaredestic theory is proposed. The proposed method uses the Fuzzy clustering and is able to set the parameters of RPS in a fair and efficient way. The proposed RPS is implemented on...

Assessment of Aggregators’ Operation and Value Sharing in Flexibility Market

, M.Sc. Thesis Sharif University of Technology Younesi, Ehsan (Author) ; Abbaspour Tehranifard, Ali (Supervisor) ; Fotuhi Firuzabad, Mahmud (Supervisor)

Abstract

Sharing the values resulting from the purchase and sale of energy in large coalitions in smart grid systems is accompanied by computational complexity and high calculation time. In order to reduce this time, this research presents novel clustering approaches to simplify the process of value sharing among players. These approaches have been employed in two methods: Shapley values and worst-case minimization (Nucleolus). In this method, players are clustered based on their roles and assets, and the K-means algorithm is also used for the second clustering method. By doing so, the constraints and the number of possible coalitions are reduced, and consequently, the calculation time in both...

Demand Response Equipments Valuation from a Retailer’s Perspective

, M.Sc. Thesis Sharif University of Technology Fayyaz Heydari, Amir (Author) ; Abbaspour Tehranifard, Ali (Supervisor) ; Fotuhi Firuzabad, Mahmud (Co-Advisor)

Abstract

Till today types of demand response program have been identified as one of the most effective and usefull programs in order to the energy efficient consumption and followed by, improving the network's reliability. Also some of these plans have reduced the risk of the retailers and as much as possible prevent the likely loss of these companies at the high energy tariffs times. The required for doing some of these types of plans is investing on various parts like infrastructure mutual relationships between retailers and customer and also smart meters which will require valuation. Till now so many various ways have been done for valuation on types of demand response program plans. This thesis...

The Hydrodynamic Study of Swimming Microorganisms and Numerical Simulation of Micro-swimmers Using Computational Fluid Dynamics

, M.Sc. Thesis Sharif University of Technology Moghimi Kheirabadi, Iman (Author) ; Abasspour, Majid (Supervisor) ; Mahdigholi, Hamid (Supervisor)

Abstract

The design, optimization, and construction of systems that are capable of swimming in the low Reynolds conditions are urgently needed in the light of the recent human, medical, industrial and scientific needs. Therefore, it is necessary to inspire the movement of microorganisms to design and construct artificial micro swimmer as well as to achieve the best geometry for swimming. In order to achieve the optimum microstructure geometry, it is necessary to know the behavior and hydrodynamic interactions of the micro swimmer with the fluid and its outer channel. In this study, we numerically simulate the movement of a microorganism with a spiral tail in a circular channel using Computational...

Electricity Distribution System Planning Considering Incentive Reliability Regulations

, Ph.D. Dissertation Sharif University of Technology Jooshaki, Mohammad (Author) ; Abbaspour Tehranifard, Ali (Supervisor) ; Lehtonen, Matti (Co-Supervisor) ; Fotuhi Firuzabad, Mahmoud (Co-Supervisor)

Abstract

Electricity distribution systems are dynamically expanded in anticipation of new demands. Cost and reliability are the most important factors in finding the optimal plans for network expansion. Recently, implementation of incentive reliability regulations has accentuated the role of reliability considerations in distribution systems studies. This is because such incentive schemes create a direct link between distribution companies' revenues and their service reliability. Thus, these schemes have changed the role of reliability from a technical constraint to an economic factor. In this occasion, distribution companies require new techniques to incorporate the effects of incentive reliability...

An approach to distribution system planning by implementing distributed generation in a deregulated electricity market

, Article 2007 Large Engineering Systems Conference on Power Engineering, LESCOPE'07, Montreal, QC, 10 October 2007 through 12 October 2007 ; January , 2007 , Pages 90-95 ; 9781424415830 (ISBN) Porkar, S ; Abbaspour Tehranifard, A ; Saadate, S ; Sharif University of Technology

2007

Abstract

Electric power deregulation has drastically affected the engineering aspects of planning. In addition need flexible electric systems, changing regulatory and economic scenarios, energy savings and environmental impact are providing impetus to the development of Distributed Generation (DG), which is predicted to play an increasing role in the electric power system of the future. This opens the venue for distribution company's (Disco) aiming to minimize their investment risks by developing optimum new planning strategies to meet the load growth and satisfy the system performance at minimum cost different electricity structures. This paper proposes a framework for solving the distribution...

Feasibility Study and Design of Artificial Energy Island (in Persian Gulf Region)

, M.Sc. Thesis Sharif University of Technology Norouzi, Parham (Author) ; Abbaspour Tehranifard, Majid (Supervisor)

Abstract

As it is obvious from the name of this study, the goal of doing this study is the feasibility study of southern shores of Iran for building an artificial energy island for and designing it. In this project by studying seven points coastwise of southern Iran and defining the criterions and scoring the points, the Chabahar was determined as the best place for erecting the artificial energy island. With respect to the environmental condition of the chosen point and modeling in software ANSYS, the structure of the artificial energy island has been studied and the type, geometric shape, area, trough, and the setting of the anchoring system has determined. As a result of these efforts, a hexagon...

Platforms Free Fall Lifeboat design, Analysis and Modification

, M.Sc. Thesis Sharif University of Technology Esmaili, Mehdi (Author) ; Abbaspoor Tehranifard, Majid (Supervisor)

Abstract

The purpose of this study was to design a Free Fall Lifeboats body for offshore platforms, then hydrostatic and hydrodynamic analyzes, focusing on the aircavity formation on the back of the boat. In the first section, previous studies and a history of this has been discussed. Then the free fall bases are described along with the various stages of launching the Free Fall Lifeboat. In the next section, the Free Fall Lifeboat's body was designed and then analyzed and lunching procces has been simulated using the star-ccm+ software. the boat with seven different parameters is solved under the assumption that the air is incompressible, in which the primary conditions are the water entry angle...

An approach to determine spinning reserve requirements in a deregulated electricity market

, Article 2006 IEEE PES Power Systems Conference and Exposition, PSCE 2006, Atlanta, GA, 29 October 2006 through 1 November 2006 ; 2006 , Pages 1341-1344 ; 142440178X (ISBN); 9781424401789 (ISBN) Porkar, S ; Fotuhi Firuzabad, M ; Abbaspour Tehranifard, A ; Porkar, B ; Sharif University of Technology

2006

Abstract

To make the energy market reliable and transactions deliverable, transmission owners must provide required ancillary services that are critical to ensure transmission open access, and to maintain an acceptable level of power system security. Spinning reserve is one of the most important ancillary services required to maintain system reliability in case of occurring a contingency. By definition, spinning reserve is the unloaded section of synchronized generation that is able to respond immediately to serve load. Studies indicate that spinning reserve requirements have significant impacts on the energy market. A new spinning reserve market structure is proposed in this paper to best utilize...

MILP-based service restoration in prosumer-based active distribution networks

, Article IEEE PES Innovative Smart Grid Technologies Conference Europe ; 2023 ; 979-835039678-2 (ISBN) Ashrafi, M ; Abbaspour-Tehranifard, A ; Fotuhi-Firuzabad, M ; Fattaheian-Dehkordi, S ; Bacha, S ; Caire, R ; Sharif University of Technology

IEEE Computer Society 2023

Abstract

The distribution systems may experience damages initiated by various events, which could result in extended network failures. These failures threaten the reliability of distribution systems and negatively impact prosumers satisfaction, and finally cause economic losses. Respectively, one of the most important issues of future distribution systems is managing failures in the presence of energy-trading plans in which prosumers participate to gain profit. In order to effectively reduce the economic losses caused by system outages, this paper proposes a two-stage Service Restoration (SR) model for prosumer-based distribution systems. The proposed model coordinates prosumers through switching and...

Effects of Vortical Flows on Hydrodynamics of Boxfish

, M.Sc. Thesis Sharif University of Technology Oloumi Yazdi, Mohammad Hassan (Author) ; Abbaspour Tehranifard, Madjid (Supervisor) ; Rad, Manoochehr (Supervisor)

Abstract

In recent decades, bio-inspired design has become a common approach among engineers. Research and study of biological systems show that these systems are very efficient and consume the least amount of energy in a definite process. Specifically, marine mammals and fishes are great sources of inspiration. As an example, recently vertical axis wind turbine farms have been designed and constructed inspired by schools of fish, to produce more electricity. Boxfishes (Teleostei: Ostraciidae) are known for their hydrodynamic stability and relatively low drag coefficient. Highly maneuverable underwater robots have been designed according to morphology of boxfishes. Furthermore, Mercedes-Benz has...

Developing the Dynamic Increasing Amplitude and Period (DIAP) Method and Investigation of its Efficiency in Ultimate Capacity Assessment of Jacket Offshore Platforms

, Ph.D. Dissertation Sharif University of Technology Imani, Hassan (Author) ; Abbaspour Tehranifard, Majid (Supervisor) ; Tabeshpour, Mohammad Reza (Co-Supervisor) ; Karimirad, Majid (Co-Supervisor)

Abstract

Dynamic increasing amplitude and period (DIAP) [1] is a time-domain analysis methodology developed based on endurance time (ET) analysis method [2], which can be used to evaluate the response of marine structures when encounters a continuous loading, such as storm conditions. In this method, instead of using separate records with different intensities, a single loading record with an increasing intensity over time is used for structural analysis. The ability to enter spectral concepts, considering the effects of waves with different frequencies and amplitudes, taking into account the effects of randomness of waves and the possibility of short duration analysis are some of the specific...

Technical English for mechanical engineers

, Book Alemi, Minoo ; Meghdari,Ali

Sharif University Press 2014

Abstract

Local educational institutions produce in-house English for Specific Purpose (ESP) materials according to the curriculum policies designated and developed by the Ministry of Higher Education In Iran. To this end, this book aims to be used in the Iranian setting at the tertiary level for undergraduate students majoring in Mechanical Engineering. Moreover, the style of English usage in this ESP textbook is American.
Regarding the content of the textbook, it has both thematic organizations in which the topics are relevant and includes sufficient treatment of the target language areas necessary for the students. The principle organizing approach of this textbook is theme-based. In addition,...