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distributed-power-generation
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IoT-based intelligent source–load–storage coordination scheme for prosumer campus microgrids
, Article Frontiers in Energy Research ; Volume 10 , 2022 ; 2296598X (ISSN) ; Shahzad, M ; Shehzad, M ; Akhter, J ; Almohaimeed, Z. M ; Akram, R ; Hussain, M. M ; Sharif University of Technology
Frontiers Media S.A
2022
Abstract
Electrical energy is very necessary for human life in the modern era. The rising energy prices, depletion of fossil fuels, and instability of the grid are alarming situations. So, it needs a smart solution to ensure the balance between pricing and saving natural resources. Some other issues like environmental change, limitations on installation of new transmission lines, reliability concerns, and considering the expansion in distributed energy generation technologies promise the implementation of distributed generation extensively. The integration of two or more energy supplies in a power system is known as distributed energy resource system. In this study, a university campus is taken as a...
On the explicit formulation of reliability assessment of distribution systems with unknown network topology: Incorporation of DG, switching interruptions, and customer-interruption quantification
, Article Applied Energy ; Volume 324 , 2022 ; 03062619 (ISSN) ; Lehtonen, M ; Fotuhi Firuzabad, M ; Muñoz Delgado, G ; Contreras, J ; Arroyo, J. M ; Sharif University of Technology
Elsevier Ltd
2022
Abstract
This paper presents an original approach for the evaluation of reliability of active distribution networks with unknown topology. Built upon novel reformulations of conventional definitions for distribution reliability indices, the dependence of system-oriented reliability metrics on network topology is explicitly formulated using a set of mixed-integer linear expressions. Unlike previously reported works also modeling mathematically the relationship between reliability assessment and network topology, the proposed approach allows considering the impact of distributed generation (DG) while accounting for switching interruptions. Moreover, for the first time in the emerging closely related...
Scheduling and sizing of campus microgrid considering demand response and economic analysis
, Article Sensors ; Volume 22, Issue 16 , 2022 ; 14248220 (ISSN) ; Shahzad, M ; Javed, H ; Muqeet, H. A ; Akhter, M. N ; Liaqat, R ; Hussain, M. M ; Sharif University of Technology
MDPI
2022
Abstract
Current energy systems face multiple problems related to inflation in energy prices, reduction of fossil fuels, and greenhouse gas emissions which are disturbing the comfort zone of energy consumers and the affordability of power for large commercial customers. These kinds of problems can be alleviated with the help of optimal planning of demand response policies and with distributed generators in the distribution system. The objective of this article is to give a strategic proposition of an energy management system for a campus microgrid (µG) to minimize the operating costs and to increase the self-consuming energy of the green distributed generators (DGs). To this end, a real-time based...
Sustainable solutions for advanced energy management system of campus microgrids: model opportunities and future challenges
, Article Sensors ; Volume 22, Issue 6 , 2022 ; 14248220 (ISSN) ; Javed, H ; Akhter, M. N ; Shahzad, M ; Munir, H. M ; Nadeem, M. U ; Bukhari, S. S. H ; Huba, M ; Sharif University of Technology
MDPI
2022
Abstract
Distributed generation connected with AC, DC, or hybrid loads and energy storage systems is known as a microgrid. Campus microgrids are an important load type. A university campus microgrids, usually, contains distributed generation resources, energy storage, and electric vehicles. The main aim of the microgrid is to provide sustainable, economical energy, and a reliable system. The advanced energy management system (AEMS) provides a smooth energy flow to the microgrid. Over the last few years, many studies were carried out to review various aspects such as energy sustainability, demand response strategies, control systems, energy management systems with different types of optimization...
A multi-objective framework for distributed energy resources planning and storage management
, Article Applied Energy ; Volume 314 , 2022 ; 03062619 (ISSN) ; Ceylan, O ; Ozdemir, A ; Fotuhi Firuzabad, M ; Sharif University of Technology
Elsevier Ltd
2022
Abstract
The use of energy storage systems (ESS) and distributed generators (DGs) to improve reliability is one of the solutions that has received much attention from researchers today. In this study, we utilize a multi-objective optimization method for optimal planning of distributed generators in electric distribution networks from the perspective of multi-objective optimization. The objective is to improve the reliability of the network while reducing the annual cost and network losses. A modified version of the multi-objective sine–cosine algorithm is used to determine the optimal size, location, and type of DGs and the optimal capacity, location, and operation strategy of the ESS. Three case...
An Milp model for switch, DG, and tie line placement to improve distribution grid reliability
, Article IEEE Systems Journal ; 2022 , Pages 1-12 ; 19328184 (ISSN) ; Ehsan, M ; Farzin, H ; Sharif University of Technology
Institute of Electrical and Electronics Engineers Inc
2022
Abstract
Remote controlled switches (RCSs) have the ability to isolate the faulted area from other parts of the distribution system. On the other hand, the dispatchable distributed generators (DDGs) and tie lines can supply the interrupted loads after fault occurrence trough microgrids and reduce the outage time. In this regard, this article proposes a planning model for simultaneous placement of RCSs, DDGs, and tie lines to improve distribution system reliability. The presence of renewable distributed generations (RDGs) and energy storage systems, which have an increasing penetration in today's distribution networks are also considered. Moreover, two different practical load shedding methods are...
A new framework for mitigating voltage regulation issue in active distribution systems considering local responsive resources
, Article IEEE Access ; Volume 9 , 2021 , Pages 152585-152594 ; 21693536 (ISSN) ; Abbaspour, A ; Mazaheri, H ; Fotuhi Firuzabad, M ; Lehtonen, M ; Sharif University of Technology
Institute of Electrical and Electronics Engineers Inc
2021
Abstract
Recently, renewable energy sources (RESs) have increasingly being integrated into the power grids as a result of environmental and governmental perspectives. In this regard, the installation of RESs as potential power sources in active distribution systems would benefit the grid by decreasing the power losses, as well as addressing the fossil fuel shortages, and their environmental aspects. Nevertheless, the high-level integration of RESs as well as the development of distributed formations in local systems could challenge the reliable operation of the grid. In this context, conventional approaches could not optimally mitigate the regulation-voltage issue; therefore, utilities have to...
Controlled islanding for enhancing grid resilience against power system blackout
, Article IEEE Transactions on Power Delivery ; Volume 36, Issue 4 , 2021 , Pages 2386-2396 ; 08858977 (ISSN) ; Amraee, T ; Fotuhi Firuzabad, M ; Sharif University of Technology
Institute of Electrical and Electronics Engineers Inc
2021
Abstract
This paper proposes a transient stability constrained controlled islanding (TSC-CI) approach against cascading events in power systems. Using the wide area measurements, the proposed islanding algorithm is implemented regarding the actual dynamic conditions of the resulted islands. Since the main concern, right after the execution of controlled network splitting, is the transient stability of synchronous machines, a transient energy function is utilized for proper network partitioning. The proposed transient stability criterion is expressed as a function of the transfer impedance between each pair of generators in the resulted islands. Transfer impedance between each pair of coherent...
Reliability assessment of distribution system with the integration of photovoltaic and energy storage systems
, Article Sustainable Energy, Grids and Networks ; Volume 28 , 2021 ; 23524677 (ISSN) ; Esmaeili Nezhad, A ; Moeini Aghtaie, M ; Fotuhi Firuzabad, M ; Sharif University of Technology
Elsevier Ltd
2021
Abstract
With the current focus on energy and the environment, efficient integration of renewable energies, especially solar energy into power systems, is becoming indispensable. Moreover, to fully capture solar potentials and to recognize the unique characteristics associated with solar energy in power systems reliability assessment, a profound investigation is needed. Accordingly, this paper attempts to establish a comprehensive analytical approach for modeling the reliability of a hybrid system (Photovoltaic (PV) system with Energy Storage System (ESS)). To this end, the output of the PV system is modeled by a multi-state model, and the ESS system is modeled as a two-state Markov model. Moreover,...
Optimal energy management of a campus microgrid considering financial and economic analysis with demand response strategies
, Article Energies ; Volume 14, Issue 24 , 2021 ; 19961073 (ISSN) ; Muqeet, H. A ; Shehzad, M ; Jamil, M ; Khan, A. A ; Guerrero, J. M ; Sharif University of Technology
MDPI
2021
Abstract
An energy management system (EMS) was proposed for a campus microgrid (μG) with the incorporation of renewable energy resources to reduce the operational expenses and costs. Many uncertainties have created problems for microgrids that limit the generation of photovoltaics, causing an upsurge in the energy market prices, where regulating the voltage or frequency is a challenging task among several microgrid systems, and in the present era, it is an extremely important research area. This type of difficulty may be mitigated in the distribution system by utilizing the optimal demand response (DR) planning strategy and a distributed generator (DG). The goal of this article was to present a...
Micro-grid stabilizer design using sliding mode controller
, Article International Journal of Electrical Power and Energy Systems ; Volume 116 , March , 2020 ; Parvari, R ; Sharif University of Technology
Elsevier Ltd
2020
Abstract
Future of the network stability is endangered by increasing the number of Distributed Generation (DG) and Renewable Energy Source (RES) units. The idea of the Virtual Synchronous Machine (VSM) has been raised to control the power electronic-based DG/RES converters in order to have better integration with the grid. This paper introduces a new stabilizer design for VSM-based converters to guarantee the stability of the micro-grid (MG). In this regard, the Sliding Mode Control (SMC) theory, which is robust against the disturbances and uncertainties, is employed to cope with the intermittent and nonlinear nature of DGs. The mutual operation of the proposed inverter and MG stabilizer has the...
A model for stochastic planning of distribution network and autonomous DG units
, Article IEEE Transactions on Industrial Informatics ; Volume 16, Issue 6 , August , 2020 , Pages 3685-3696 ; Farzin, H ; Abbaspour, A ; Fotuhi-Firuzabad, M ; Lehtonen, M ; Sharif University of Technology
IEEE Computer Society
2020
Abstract
This article presents a mixed-integer linear stochastic model for the optimal expansion planning of electricity distribution networks and distributed generation (DG) units. In the proposed framework, autonomous DG units are aggregated and modeled using the well-known energy hub concept. In this model, the uncertainties of heat and electricity demand as well as renewable generation are represented using various scenarios. Although this is a standard technique to capture the uncertainties, it drastically increases the dimensions of this optimization problem and makes it practically intractable. In order to address this issue, a novel iterative method is developed in this article to enhance the...
Reliability based joint distribution network and distributed generation expansion planning
, Article 2020 International Conference on Probabilistic Methods Applied to Power Systems, PMAPS 2020, 18 August 2020 through 21 August 2020 ; September , 2020 ; Fotuhi Firuzabad, M ; Moeini Aghtaie, M ; Pourghaderi, N ; Lehtonen, M ; Sharif University of Technology
Institute of Electrical and Electronics Engineers Inc
2020
Abstract
In this paper the reliability of distribution network is modeled in joint multistage expansion planning of distribution network assets and distributed generations (DGs). The imposed costs due to network reliability weakness are considerable in the distribution level. Therefore in the proposed model distribution network operator (DNO) considers the costs associated with load interruptions in the planning problem. In this regard, reliability evaluation of the network is modeled in the joint multistage distribution network expansion planning (MDNEP) problem in an integrated manner while the network topology is unknown until the planning problem is not solved. In the proposed joint MDNEP problem...
Incorporating flexibility requirements into distribution system expansion planning studies based on regulatory policies
, Article International Journal of Electrical Power and Energy Systems ; Volume 118 , 2020 ; Jooshaki, M ; Moeini Aghtaie, M ; Abbaspour, A ; Fotuhi Firuzabad, M ; Sharif University of Technology
Elsevier Ltd
2020
Abstract
Increasing penetration of renewable energy sources with intermittent generation calls for further flexibility requirements for efficient as well as the safe operation of power systems. Considering the significant growth of distributed energy resources in distribution systems, a promising approach to fulfill such requirements is to deploy local flexibility sources at the distribution level. Nonetheless, due to the monopoly nature of electricity distribution business, effective regulations are required to direct distribution companies toward fulfilling such goals. Accordingly, this paper aims at proposing various policies to motivate distribution companies to enhance the flexibility of their...
A multi-objective framework for energy resource scheduling in active distribution networks
, Article International Journal of Ambient Energy ; Volume 40, Issue 5 , 2019 , Pages 504-516 ; 01430750 (ISSN) ; Ghazi, R ; Moeini Aghtaie, M ; Sharif University of Technology
Taylor and Francis Ltd
2019
Abstract
Purpose: The purpose of this paper is to investigate the impacts of electric vehicles' (EVs) charging/discharging decisions in energy resources scheduling problem of active distribution networks. Design/methodology/approach: The problem under study is modelled as a two-stage optimisation problem in which the main requirements of EV owners are introduced as an objective function of the first stage. The total energy costs and the emission factor are considered as the main criteria of the second stage. The output generation schedules of distributed generation (DG) technologies together with the charging/discharging schedule of EVs are proposed as decision variables of the energy scheduling...
A flexibility-oriented model for distribution system expansion planning studies
, Article 27th Iranian Conference on Electrical Engineering, ICEE 2019, 30 April 2019 through 2 May 2019 ; 2019 , Pages 737-741 ; 9781728115085 (ISBN) ; Jooshaki, M ; Moeini Aghtaei, M ; Abbaspour, A ; Fotuhi Firuzabad, M ; Sharif University of Technology
Institute of Electrical and Electronics Engineers Inc
2019
Abstract
Employing more flexibility in power systems is one of the main challenges brought about by integrating more renewable energy sources in power systems. A promising way to overcome this challenge is to have local sources of flexibility in distribution level. In this respect, a novel approach is introduced in this paper for multi-stage distribution system expansion planning which jointly considers expansion of the network assets as well as flexibility enhancement. To this end, construction and reinforcement of feeders and substations are considered as various alternatives for network expansion. Moreover, installation of conventional dispatchable distributed generation units is selected as the...
Joint distributed generation and active distribution network expansion planning considering active management of network
, Article 27th Iranian Conference on Electrical Engineering, ICEE 2019, 30 April 2019 through 2 May 2019 ; 2019 , Pages 702-708 ; 9781728115085 (ISBN) ; Fotuhi Firuzabad, M ; Moeini Aghtaie, M ; Pourghaderia, N ; Sharif University of Technology
Institute of Electrical and Electronics Engineers Inc
2019
Abstract
Joint multistage expansion planning of active distribution network (ADN) is well investigated in this paper. This expansion model considers the effects of optimal operating conditions in the planning studies. In the proposed model, for each planning time stage, several operating scenarios are defined based on operational status of the network. The utilization of distributed energy resources (DERs) around the network is determined for each operating scenario through active management of these resources. In the planning level, investment in distribution network assets including feeders, substations, and distributed generations (DGs) incorporating conventional gas turbines and renewable wind...
Distribution system reconfiguration for loss reduction incorporating load and renewable generation uncertainties
, Article 2019 IEEE Texas Power and Energy Conference, TPEC 2019, 7 February 2019 through 8 February 2019 ; 2019 ; 9781538692844 (ISBN) ; Amini, M ; Modarresi, M. S ; Jafarishiadeh, F ; Sharif University of Technology
Institute of Electrical and Electronics Engineers Inc
2019
Abstract
A significant share of losses in power systems occurs in distribution network due to lower voltages and longer lines. On top of that, unbalanced operation causes additional losses in these networks. In recent years with the development of distributed generation connected to the distribution grid, the concern over frequency and intensity of unbalanced operation has risen. Reconfiguration of these distribution networks plays a significant role in power loss minimization and voltage quality enhancement. The uncertainty regarding grid-connected DG resources and net loads are among the critical factors that must be taken into account. To do so, in this paper a novel Fuzzy-based reconfiguration...
Optimal DG placement and sizing based on MICP in radial distribution networks
, Article IEEE Proceedings 2017 Smart Grid Conference, SGC 2017 ; Volume 2018-January , 2018 , Pages 1-6 ; 9781538642795 (ISBN) ; Ranjbar, A. M ; Safdarian, A ; Sharif University of Technology
Institute of Electrical and Electronics Engineers Inc
2018
Abstract
Electric distribution system is one of the most important parts of power systems owing to delivering electricity to consumers. The major amount of losses in a power system is in distribution level. Optimal distributed generation (DG) placement and sizing have a significant effect on power loss reduction in distribution systems. In this paper, a mixed integer conic programming (MICP) approach is presented to solve the problem of DG placement, sizing, and hourly generation with the aim of reducing power loss and costs in radial distribution systems. The costs include both investment and operational costs of DGs. Hourly load variations are considered in the model. To verify the effectiveness of...
A multi-objective framework for energy resource scheduling in active distribution networks
, Article International Journal of Ambient Energy ; 2018 , Pages 1-13 ; 01430750 (ISSN) ; Ghazi, R ; Moeini Aghtaie, M ; Sharif University of Technology
Taylor and Francis Ltd
2018
Abstract
Purpose: The purpose of this paper is to investigate the impacts of electric vehicles' (EVs) charging/discharging decisions in energy resources scheduling problem of active distribution networks. Design/methodology/approach: The problem under study is modelled as a two-stage optimisation problem in which the main requirements of EV owners are introduced as an objective function of the first stage. The total energy costs and the emission factor are considered as the main criteria of the second stage. The output generation schedules of distributed generation (DG) technologies together with the charging/discharging schedule of EVs are proposed as decision variables of the energy scheduling...