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fotuhi-firuzabad--mahmood
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Optimal Charge Scheduling of Plug-in Hybrid Electric Vehicles to Improve Distribution System Operatoion
, M.Sc. Thesis Sharif University of Technology ; 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...
Smart Home Incorporating Load Control
, M.Sc. Thesis Sharif University of Technology ; Fotuhi Firuzabad, Mahmoud (Supervisor)
Abstract
Smart grid brings miscellaneous concepts and advantages; increasing power quality, decreasing outages, motivating the consumers to participate in power system plans, and accommodating distributed generations (DG) are the most important purposes of smart grid implementation. Appearance of modern technologies makes operators devise better operation function. The effect of these technologies on the power system should be probed by sufficient criterions. In addition, preventing undesirable consequences of new technologies operation in the grid is the requirement of having smarter grid. In this thesis, based on the smart home concept two issues are discussed. In the first issue, a new algorithm...
Operation of Distribution Systems with High Penetration of Wind Energy
, M.Sc. Thesis Sharif University of Technology ; Fotuhi-Firuzabad, Mahmoud (Supervisor)
Abstract
Power distribution systems have been traditionally operated as passive networks which consume electric power supplied by the transmission grid. Increasing utilization of wind energy in distribution systems, notably wind energy, is changing the way distribution sys-tems are operated. The distribution system operators (DSO) would operate the available wind power for reducing the power purchased from the wholesale market. However, high penetration of wind energy in distribution systems would require advanced operation mod-els and additional flexibility in system to offset the variability and uncertainty associated with wind energy. In addition, wind availability often does not positively...
Developing a New Mechanism for Managing Technical Issues of Energy Transactions in Transactive Energy Market
, M.Sc. Thesis Sharif University of Technology ; Fotuhi Firuzabad, Mahmud (Supervisor)
Abstract
Distribution power systems are undergoing a fundamental transition with the introduction of microgrids (MGs) and proliferation of renewable energy sources inspired mainly by privacy and environmental concerns. In this regard, energy management methods employed by utilities should take into account the intermittent nature of RESs power production while coping with the independent operation of MGs. Transactive energy (TE) is an emerging concept which utilizes economic-based mechanisms to facilitate the dynamic and decentralized management of active agents of the system. However, the energy transactions between transactive agents could have adverse impacts on the technical aspect of the system...
Integrated Planning for Distribution Automation and Network Capacity Expansion
, Ph.D. Dissertation Sharif University of Technology ; Fotuhi-Firuzabad, Mahmud (Supervisor)
Abstract
Implementing distribution automation system (DAS) in distribution networks needs a huge investment which usually cannot be funded entirely in a short period of time. So distribution companies (DISCOs) should develop long term plans to equip their network with automation technologies as far as economically justifiable. Similarly, DISCOs have network capacity expansion (NCX) plans which specify the scheme of construction of feeders and substations. Since considering DAS may lead to more efficient NCX plans, the planner should revise the NCX plan through the DAS planning. On the other hand, for DAS planning it is necessary to consider a NCX plan as a platform to determine the time and location...
Financial Risk Management of an Electricity Retailer in the Presence of Intermittent Generation and Demand Response
, M.Sc. Thesis Sharif University of Technology ; Fotuhi Firuzabad, Mahmud (Supervisor)
Abstract
According to uncertainty of retailer's customers electricity load and energy price in day-ahead and real-time markets, different scenarios are faced to an electricity retailer. As a result, due to possibility of different scenarios accurance, profit and financial loss of retailer has uncertainty and significant financial risk is imposed to retailer. Electricity retailers for earning the expected profit, reduction ofpossibility of scenarios with little profit (or much loss) and reduction of their risks, use different sources. bilateral contracts, like forward and call option,local wind turbines, distributed generaion, demand response, like load shift and curtailment can be named. This...
Reliability Studies of a Smart Distribution System Based on the Concept of Multi-microgrid
, Ph.D. Dissertation Sharif University of Technology ; Fotuhi Firuzabad, Mahmud (Supervisor)
Abstract
Current trend of energy consumption and aging infrastructure of electricity grids mandates high amounts of investment in transmission and distribution networks. On the other hand, with increased awareness about environmental issues, share of renewable energy resources in power generation portfolio has risen in recent years. Microgrids, as one of the most promising solutions to tackle these issues, are able to accommodate high penetration levels of renewable energy sources and distributed generation in distribution systems. However, microgrids sizes are limited due to some operational considerations and as a result, efficient management of distribution systems with high penetration of...
Developing a New Approach for Reliability Evaluation of Large Scale Composite Systems
, M.Sc. Thesis Sharif University of Technology ; Fotuhi Firuzabad, Mahmud (Supervisor)
Abstract
The main concern of power system planners and operators is to serve electric energy services economically and in an acceptable reliability level. Nowadays, in developing integrated large-scale power networks, reliability evaluation becomes a very tough and time-consuming process. The complexity of this assessment is mainly because of the large number of components, their possible operating states, different faults that can happen, and environmental and other affecting parameters. In power systems, in order to address the complexity, reliability evaluation can be conducted in three different levels. The most complicated study among these three levels is HLII that is so-called composite...
Developing an Efficient Framework for Bidding Strategy of a Technical Virtual Power Plant Considering Network Reliability
, M.Sc. Thesis Sharif University of Technology ; Fotuhi Firuzabad, Mahmud (Supervisor)
Abstract
Virtual power plant (VPP) aggregates the capacity of many diverse distributed energy resources (DERs); it creates a single operating profile from a composite of the parameters characterizing each DER and can incorporate the impact of the network on aggregated DER output. In modern power systems, technical virtual power plants (TVPPs) play an important role enabling presence of DERs in electricity markets. This thesis addresses the optimal bidding strategy problem of a TVPP that participates in the day-ahead (DA) electricity market. TVPP schedules its energy resources in a manner that maximize its profit in DA market. Hence, the optimal schedule of its resources is achieved. In a proposed...
Reliability-based selection of wind turbines for large-scale wind farms
, Article World Academy of Science, Engineering and Technology ; Volume 37 , 2009 , Pages 734-740 ; 2010376X (ISSN) ; Salehi Dobakhshari, A ; Sharif University of Technology
2009
Abstract
This paper presents a reliability-based approach to select appropriate wind turbine types for a wind farm considering site-specific wind speed patterns. An actual wind farm in the northern region of Iran with the wind speed registration of one year is studied in this paper. An analytic approach based on total probability theorem is utilized in this paper to model the probabilistic behavior of both turbines' availability and wind speed. Well-known probabilistic reliability indices such as loss of load expectation (LOLE), expected energy not supplied (EENS) and incremental peak load carrying capability (IPLCC) for wind power integration in the Roy Billinton Test System (RBTS) are examined. The...
A fuzzy logic based approach to determine system well-being indices
, Article European Transactions on Electrical Power ; Volume 18, Issue 6 , 2008 , Pages 636-654 ; 1430144X (ISSN) ; Abiri Jahromi, A ; Sharif University of Technology
2008
Abstract
A new approach is presented in this paper to determine the degree of system well-being in the form of healthy, marginal and at risk state indices using the fuzzy logic concepts. Conventional well-being method uses a crisp deterministic criterion to divide power system comfort zone into the healthy and marginal states. In this regard, the main drawback is associated with categorising the system performance in the comfort zone into the healthy and marginal states. To overcome this problem, a new approach is developed that categorises the states as healthy or marginal using fuzzy logic. The technique together with the effects on the system risk and the system health and margin probabilities of...
A Comprehensive Scheme for Reliability-Centered Asset Management Implementation in Power Distribution Systems
, M.Sc. Thesis Sharif University of Technology ; Fotuhi Firuzabad, Mahmoud (Supervisor)
Abstract
Toward the cost-effective solutions for the challenging features of maintenance in nowadays restructured power systems, reliability centered maintenance (RCM) has been introduced as the efficient key due to its streamlined performance. RCM, although has proven its noticeable merits in many industries, has not been yet furnished with efficient analytical methods in the power engineering context. In a power distribution system, vividly in a deregulated market and restructured environment, blind time based maintenance of all the distribution equipments is neither affordable nor economically justifiable. Moreover, an acceptable level of system reliability is an indispensable criterion for the...
Reliability Centered Maintenance (RCM) Implementation in Power Transmission Systems
, M.Sc. Thesis Sharif University of Technology ; Fotuhi-Firuzabad, Mahmud (Supervisor)
Abstract
The current restructuring trend in power industry emplaces the owners and managers under a great pressure to not only reduce the associated investment costs, but also reasonably cut the operation and maintenance expenses as much as possible, while keeping both the power quality and reliability requirements met. Reliability-Centered Maintenance (RCM) has been proved to be in response to this dilemma in power systems since it has been yet successfully applied in various engineering contexts worldwide. This process is more challenging when it comes to the power transmission systems because of its bulkiness and complex structure. On the other hand, market involvement and its intricate behavior...
Optimal Maintenance Scheduling of Power System Generating Units Considering Reliability Centered Maintenance Requirements
, M.Sc. Thesis Sharif University of Technology ; Fotuhi Firuzabad, Mahmud (Supervisor)
Abstract
In the past several decades, with the increasing evolution of electricity markets, maintenance philosophy has gradually changed, and maintenance process plays a crucial role on the profitability and effectiveness of companies. Therefore, this leads managers to use modern strategies that their performance has been proved in various industries and therefore, traditional strategies have lost their effectiveness. Reliability-Centered Maintenance (RCM) is one of the most successful strategies wherein the maintenance process of system components is linked to improvements in the system reliability and profit of companies. RCM has not been thoroughly furnished in generation system yet. This thesis...
Semi-automated Distribution System Planning with Considering Decentralized Automation at Feeder Level
, M.Sc. Thesis Sharif University of Technology ; Fotuhi Firuzabad, Mahmoud (Supervisor)
Abstract
Implementation of telecommunication-based distribution automation is possible in both centralized and decentralized manners. Although centralized automation is more pervasive than decentralized automation, benefits of decentralized automation systems, like improving reliability and speeding up the fault management process, encourage distribution companies to implement these systems. However, high cost of decentralized automation can be a deterrent to most distribution companies. Therefore, economic planning and creating economic justifications for decentralized distribution automation are necessary for the development of these systems. In this dissertation, economic analysis and planning of...
Efficient and Economic Reliability Target Setting and Legislation in Electric Power Distribution Systems
, M.Sc. Thesis Sharif University of Technology ; Fotuhi Firuzabad, Mahmud (Supervisor)
Abstract
A high percentage of power grid faults occur in the distribution sector, which causes customers to experience power outages. In order to maintain a good reputation with customers and maximize their satisfaction, improving the reliability of the services provided in the electricity distribution network and minimizing related costs have always been one of the most important challenges for electricity network managers. Therefore, managers and legislators of the power network are always looking for a way to maintain the reliability level of the power distribution network and also to improve it. So far, many researchers have focused on setting goals with the help of average performance methods...
Developing Prerequisites for the Implementation of Incentive-Based Demand Response – Predicting Demand Response Potential and Estimating the Baseline Load Pattern Using Machined Learning Methods
, M.Sc. Thesis Sharif University of Technology ; Fotuhi Firuzabad, Mahmud (Supervisor)
Abstract
In recent years, the development of demand response programs with the aim of activating the demand side in order to achieve a wide range of economic and technical benefits in the development of the power system structure has been considered. With the implementation of incentive-based demand response plans, customers receive financial rewards based on changing their load pattern in the favor of electricity companies. However, mid-term and long-term planning to take advantage of this potential requires accurate estimation of the demand response potential in the power system. Also, the value of the baseline load curve of the customers (an estimate of the energy consumption of the customers if...
An analytical method to consider DG impacts on distribution system reliability
, Article 2005 IEEE/PES Transmission and DistributionConference and Exhibition - Asia and Pacific, Dalian, 15 August 2005 through 18 August 2005 ; Volume 2005 , 2005 , Pages 1-6 ; 0780391144 (ISBN); 9780780391147 (ISBN) ; Rajabi Ghahnavie, A ; Sharif University of Technology
2005
Abstract
Distributed generation is expected to play an increasing role in emerging power systems. They use different type of resources and technologies to serve energy to power system. DG has positive and negative effects for both the utilities and customers. System and load point reliability indices are normally improved if DG is installed in a distribution network. On the other hand, DG has some specific characteristics which distinguish it from conventional generating units. Therefore, they should not be treated as conventional generating units to perform reliability evaluation. An appropriate model is required to be developed in order to assess impacts of DG on reliability indices. Impacts of DG...
Allocation of Operating Reserve to Demand Response Resources in Composite System
, M.Sc. Thesis Sharif University of Technology ; Fotuhi Firuzabad, Mahmoud (Supervisor)
Abstract
Considerable developments in demand-side real-time telemetry systems allow ISOs to use demand-side provided reserves in ancillary service markets. Presently, many ISOs designed programs to utilize the reserve provided by demand response resources in their market, and deploy them in emergency conditions. These programs are called ancillary service demand response (ASDR) programs. This thesis presents a stochastic programming model to schedule reserve provided by demand response resources in load buses of system. The demand-side reserve resources are modeled by demand response providers (DRP) which have the responsibility of aggregating and managing responses of customers. The reserve provided...
Designing a Proper Residential Demand Response Program To Improve Distribution System Reliability
, M.Sc. Thesis Sharif University of Technology ; Fotuhi-Firuzabad, Mahmoud (Supervisor)
Abstract
In recent years, the pace of increment in electrical energy consumption is getting faster. Establishing new power-plants to keep a balance between generation and consumption not only has a high investment cost but also is a time consuming procedure. Thus, several studies have focused on the demand side management. Residential consumers possess remarkable portion of total electricity consumption. Accordingly, at first, the appropriate residential demand response program is selected based on presented experimental criteria. In the next step, since the network reliability is an important issue to the operators, the impact of implementation of the demand response program is studied on the...