Search for: distribution-companies
Total 36 records
Reliability incentive regulation based on reward-penalty mechanism using distribution feeders clustering, Article International Transactions on Electrical Energy Systems ; Volume 31, Issue 8 , 2021 ; 20507038 (ISSN) ; Fotuhi Firuzabad, M ; Ehsan, M ; Mohammadnezhad Shourkaei, H ; Jooshaki, M ; Sharif University of Technology
John Wiley and Sons Ltd 2021
This paper proposes an approach to enhance the reliability regulation based on the relative performance. In the proposed approach, the distribution system feeders are clustered based on the parameters, which cannot be controlled by distribution companies. Afterward, a reliability incentive regulation is applied to each cluster so that the performance of each feeder is compared to its counterparts in the same cluster. The quality regulation is designed based on the reward-penalty mechanism, which penalizes feeders whose performance is worse than a benchmark and rewards those providing a performance higher than the benchmark. Then, the reward and penalty associated to the electric distribution...
Distributed generation planning for losses, voltage profile, line congestion and total system cost improvement, Article International Review of Electrical Engineering ; Volume 4, Issue 3 , 2009 , Pages 434-440 ; 18276660 (ISSN) ; Poure, P ; Abbaspour Tehrani fard, A ; Saadate, S ; Sharif University of Technology
The main goal of this paper is to obtain the optimal Distributed Generation (DG) investments as well as purchase additional power from Transmission Companies (TRANSCOs). To do this, a new mathematical modeling and a new software package interfacing between the two powerful softwares MATLAB and GAMS are used. The proposed model optimizes total system planning costs and consequently costumers' bills, reduces total system losses, guaranties system voltage profiles and prevents feeders' congestion. This new model and software package have been executed in two different cases depending if system voltage profiles are in their permissible margin or not; in each case, three different scenarios are...
Article IET Conference Publications, Stockholm ; Volume 2013, Issue 615 CP , June , 2013 ; 9781849197328 (ISBN) ; Asl, M. A ; Vasigh, R ; Shafiei, H ; Sharif University of Technology
The communication between control centers, contact centers, field technicians and customers have been changed in previous decade and traditional analogue communication devices have been being replaced by integrated digital systems. Nowadays communication and computer network substructures are vital to distribution companies because communication system interruption can disrupt majority of services. Therefore, it is necessary to control any situation which can threat communication system. Alborz province power distribution company uses data mining methods like classification and clustering in addition to quantitative statistics for analyzing historical fault data. The result of this study is...
Article IEEE Transactions on Power Systems ; Volume 30, Issue 3 , 2015 , Pages 1143-1154 ; 08858950 (ISSN) ; Fotuhi Firuzabad, M ; Lehtonen, M ; Sharif University of Technology
Institute of Electrical and Electronics Engineers Inc 2015
Time varying prices by motivating customers to reduce their consumption in peak periods propel the electricity industry towards a higher efficiency compared to that of common flat prices. Focusing on time-of-use (TOU) sale prices, this paper establishes a stochastic model for the medium-term decision making problem faced by a distribution company (DisCo). The developed model deals with the DisCo's decisions on the level of involvement in forward contracts and in the pool as well as the sale prices offered to customers. The demand response to TOU prices is captured using a price elasticity matrix (PEM). The objective is to maximize the DisCo's profit while the exposure risk imposed by...
A novel optimal distribution system planning framework implementing distributed generation in a deregulated electricity market, Article Electric Power Systems Research ; Volume 80, Issue 7 , July , 2010 , Pages 828-837 ; 03787796 (ISSN) ; Poure, P ; Abbaspour Tehrani fard, A ; Saadate, S ; Sharif University of Technology
This paper introduces a new framework included mathematical model and a new software package interfacing two powerful softwares (MATLAB and GAMS) for obtaining the optimal distributed generation (DG) capacity sizing and sitting investments with capability to simulate large distribution system planning. The proposed optimization model allows minimizing total system planning costs for DG investment, DG operation and maintenance, purchase of power by the distribution companies (DISCOs) from transmission companies (TRANSCOs) and system power losses. The proposed model provides not only the DG size and site but also the new market price as well. Three different cases depending on system...
Article IEEE Transactions on Smart Grid ; 12 July , 2018 , Page(s): 1 - 1 ; 19493053 (ISSN) ; Fotuhi Firuzabad, M ; Sharif University of Technology
Institute of Electrical and Electronics Engineers Inc 2018
Due to the huge amount of resources needed for implementing distribution automation systems (DAS), distribution companies (DISCOs) should develop long term plans for this project. Similarly, DISCOs have network capacity expansion (NCX) plans which specify the scheme of constructing the 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 for installation of automation equipment. Therefore the planner should simultaneously work on two plans, each of them affects the other. To...
Article IEEE Transactions on Smart Grid ; Volume 10, Issue 4 , 2019 , Pages 4279-4288 ; 19493053 (ISSN) ; Fotuhi Firuzabad, M ; Sharif University of Technology
Institute of Electrical and Electronics Engineers Inc 2019
Due to the large amount of resources needed for implementing distribution automation systems (DASs), distribution companies (DISCOs) should develop long term plans for this project. Similarly, DISCOs have network capacity expansion (NCX) plans which specify the scheme of constructing the 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 for installation of automation equipment. Therefore the planner should simultaneously work on two plans, each of them affects the other....
Cleaner distribution of electricity energy considering Personnel's attitudes toward waste generation, Article Journal of Cleaner Production ; Volume 209 , 2019 , Pages 371-385 ; 09596526 (ISSN) ; Rezaie, K ; Fotuhi Firuzabad, M ; Sharif University of Technology
Elsevier Ltd 2019
Electrification involves many activities that have detrimental impacts on environment. Over the last few years, many studies have been conducted to understand, estimate and mitigate the carbon footprint of electricity distribution but other environmental aspects of electrification remain almost neglected. In recent years, electricity distribution companies have adopted many waste management techniques to reduce the amount of waste generated in their key processes. However, the causes of waste and the necessary corrective actions to alleviate the waste generation in electricity distribution have not been studies in an integrated framework. In current study, which was conducted to fill this...
Article IEEE Transactions on Smart Grid ; Vol. 5, issue. 5 , 2014 , p. 2235-2245 ; ISSN: 19493053 ; Fotuhi-Firuzabad, M ; Lehtonen, M ; Sharif University of Technology
Real-time electricity prices along with demand-side potentials can provide distribution companies (DisCos) with considerable financial and technical benefits compared to the conventional flat prices. This paper incorporates demand response in DisCos' short-term decision model in a real-time pricing (RTP) environment wherein consumers are charged based on hourly varying prices. Besides the hourly RTP sale prices, the established model deals with other DisCo's short-term activities including hourly purchases from the grid, commitment of distributed generation (DG) units, dispatch of shunt compensators, and invocation of load curtailments (LCs). The stochastic nature of wholesale market prices...
Designing a new procedure for reward and penalty scheme in performance-based regulation of electricity distribution companies, Article International Transactions on Electrical Energy Systems ; Volume 28, Issue 11 , 2018 ; 20507038 (ISSN) ; Abbaspour, A ; Fotuhi Firuzabad, M ; Moeini Aghtaie, M ; Lehtonen, M ; Sharif University of Technology
John Wiley and Sons Ltd 2018
This paper introduces a new fuzzy-based design procedure for more efficient application of reward-penalty schemes in distribution sector. To achieve a fair as well as applicable regulation scheme, the fuzzy C-means clustering algorithm is employed to efficiently determine the similarity among distribution companies. As setting procedure of the reward-penalty scheme parameters can significantly affect the income of different companies, a new procedure based on the membership degrees obtained from the fuzzy C-means algorithm is proposed to fairly determine these parameters for each electricity distribution company. Some numerical studies are performed on the Iranian electricity distribution...
Centralized-Decentralized Coordination of Aggregators and Electric Vehicles for Vehicle-to-Grid Frequency Regulation, M.Sc. Thesis Sharif University of Technology ; Haeri, Mohammad
In this paper, an energy management problem of a distribution system is studied. The energy trading among a distribution company and some aggregators controlling flexible loads and electric vehicles is modeled as a large-scale Nash bargaining problem. A distributed approach is proposed using the alternating direction method of multipliers decomposition technique, to keep privacy of traders and reduce calculation complexities. We prove that the proposed method admits a Nash bargaining solution. Since the participants' information is not available beforehand, we design an MPC-based algorithm to overcome system uncertainties. To verify the proposed approach a numerical scenario has been...
A multistage model for distribution expansion planning with distributed generation in a deregulated electricity market, Article Iranian Journal of Science and Technology, Transaction B: Engineering ; Volume 34, Issue 3 , 2010 , Pages 275-287 ; 10286284 (ISSN) ; Abbaspour Tehrani Fard, A ; Poure, P ; Saadate, S ; Sharif University of Technology
Distribution systems management is becoming an increasingly complicated issue due to the introduction of new technologies, new energy trading strategies and a new deregulated environment. In the new deregulated energy market and considering the incentives coming from the technical and economic fields, it is reasonable to consider Distributed Generation (DG) as a viable option for systems reinforcement in competition with voltage regulator devices, to solve the lacking electric power supply problem and meet the load growth requirements with a reasonable price as well as the system power quality problems. The problem of optimal placement and size is formulated in two stages; minimization of...
A bi-level approach for optimal contract pricing of independent dispatchable DG units in distribution networks, Article International Transactions on Electrical Energy Systems ; Volume 26, Issue 8 , 2016 , Pages 1685-1704 ; 20507038 (ISSN) ; Rajabi Ghahnavieh, A ; Haghighat, H ; Sharif University of Technology
John Wiley and Sons Ltd 2016
Distributed generation (DG) units are increasingly installed in the power systems. Distribution companies (DisCo) can opt to purchase the electricity from DG in an energy purchase contract to supply the customer demand and reduce energy loss. This paper proposes a framework for optimal contract pricing of independent dispatchable DG units considering competition among them. While DG units tend to increase their profit from the energy purchase contract, DisCo minimizes the demand supply cost. Multi-leader follower game theory concept is used to analyze the situation in which competing DG units offer the energy price to DisCo and DisCo determines the DG generation. A bi-level approach is used...
Article IEEE Transactions on Power Systems ; Volume 32, Issue 5 , 2017 , Pages 3451-3460 ; 08858950 (ISSN) ; Fotuhi Firuzabad, M ; Lehtonen, M ; Sharif University of Technology
Implementing automation system in distribution networks needs a huge investment that 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. Aiming to provide a methodology for development such plans, this paper presents a novel multistage planning model for implementing distribution automation system considering all main hardware and software infrastructures. The proposed method optimally determines the type, location, and time in which an equipment or infrastructure must be added to network considering the network capacity expansion...
M.Sc. Thesis Sharif University of Technology ; Rajabi-Ghahnavieh, Abbas
Increase in electricity demands and expansion cost of the power system as well as raising more concerns on environmental issues have led to increasing attraction towards Distributed Generation (DG) application in power systems. DG is generally defined as small generation units, ranging from several KW to several MW, that are installed on the distribution network. In Iran, the energy generated by DG units is purchased by Tavanir or distribution companies through guaranteed fixed-price purchase contract. The contract price imposes substantial effects on the cost and benefit of DG owners as well as those of the distribution company (DisCo). A logical and fair pricing model can provide more...
Ph.D. Dissertation Sharif University of Technology ; Fotuhi-Firuzabad, Mahmud ; Lehtonen, Matti
The major goal of the power industry is to serve the demand of electricity consumers as reliable as possible but at an affordable cost. Towards the goal, however, the industry faces substantial barriers such as aging infrastructures, growing demand, and limited budgets for reinforcements. A great portion of infrastructures which were built decades ago need to be retired. The growing demand needs system reinforcement and expansion. These, in turn, require considerable amounts of investment which is in contradiction with highly limited budget of the power industry. This critical situation forces the industry to utilize the existing system more efficiently and wisely. To this end, the concept...
M.Sc. Thesis Sharif University of Technology ; Safdarian, Amir
By intertwining community daily life to electricity, high reliability and quality, safe, and low-cost services become among common expectations of electric energy customers. The substantial sources of fault events, however, lead to unexpected service interruptions. The exhaustion of existing devices, radial structure of current distribution networks, and lack of sufficient control and monitoring systems even worsen the situation. Therefore, investing in distribution systems in order to improve the service reliability and quality has been deemed as a proper strategy for electricity planners and operators. Various approaches have been proposed to achieve this aim. Among them, implementing...
Article IEEE Transactions on Power Delivery ; Vol. 29, issue. 2 , 2014 , p. 733-741 ; ISSN: 8858977 ; Fotuhi-Firuzabad, M ; Lehtonen, M ; Sharif University of Technology
Time-varying electricity rates enable demand-side potentials, which provide an opportunity for distribution companies (DisCos) to hedge against the financial risk imposed by volatile spot market prices and uncertain customers' load. In particular, time-varying rates can be effective alternatives for at least a portion of costly forward contracts. This paper establishes a stochastic framework to determine optimal forward market purchases under time-varying rates. Various electricity rating strategies with different time intervals covering flat, time-of-use, and real-time pricing schemes are considered. The objective of the framework is to maximize DisCo's expected profit while the exposure...
Effect of financial and technical uncertainty on distribution network reconstruction project selection, Article IET Conference Publications ; Volume 2013, Issue 615 CP , 2013 ; 9781849197328 (ISBN) ; Eini, B. J ; Mehrabi, A ; Naghdi, M ; Sharif University of Technology
Distribution companies are pressurized into investing in many projects for ensuring customer satisfaction and increasing their profitability. There are a lot of feasible projects that may help companies to improve their services, but resources for accomplishing them are limited. Therefore, financial subjects are crucially important for related decision making and budget allocation is a bone of contention between different departments of companies. Project net present value (NPV), which depends on investment, expected annual profit, interest rate and inflation rate, is realistic criterion of project economic value. Interest rate and inflation rate are not predefined coefficients....
Article IET Conference Publications ; Volume 2013, Issue 615 CP , 2013 ; 9781849197328 (ISBN) ; Eini, B. J ; Mirvazand, M ; Safari, M ; Sharif University of Technology
Distribution companies try to meet different goals such as increasing profitability, reducing investment and improving reliability indices. Therefore, distribution network planning has converted into complex multi-objective optimization problems. Mathematicians and operation research experts have developed many methods which can be used for solving these problems. Despite all efforts to develop applicable approaches for these problems, there is still no general consensus on project selection policy. Evaluating the strengths and weaknesses of each network optimization strategy selection in pragmatic manner is the objective of current research. In this paper, many methods used in network...