MahmoudReza Haghifam

Tarbiat Modares University | TMU · Department of Electrical Engineering

Electricity losses, as an integral part of distribution systems, have always been recognized as a measure of how network management is conducted by power industry stockholders. As high network losses indicate managerial and technical weakness in the relevant distribution company. Accurate measurement of losses is possible through extensive real-tim...

The lack of clarity regarding the participation of transmission system operators and their collaboration with distribution system operators in local flexibility markets is one of the challenges of these markets. So in this study for managing transmission system unpredicted congestions due to sudden increase in system load with demand side resources...

This paper proposes an optimal residential energy hub (REH) design framework where the desired tradeoff between maximizing the satisfaction level of residential user energy usage and minimizing the overall costs is obtained by establishing a customer desire function (CDF). Considering the major household appliances, the REH demands are categorized...

Owing to the use of the Permanent Magnet Synchronous Motor (PMSM) widely in Electrical Vehicles (EVs), the mandatory existence of rotor angle sensor in its control algorithm, higher reliability of the resolver than the other instance, and eventually, the significant effect of resolver errors on the system stability, comparing the reliability of two...

Several players are enabled in smart grids and involved in decision-making process. These players are fully interconnected in the transactive energy (TE) framework to operate the system optimally. By implementing the TE, the final decision are adopted after various consensus between participants. Hence, huge number of data and information are commu...

This paper proposes a branch and fault locating method based on traveling wave theory. This method requires only one sensor in the system to detect the fault location. In this method, the distribution system is assumed to be an undirected graph, with the edges and vertices representing the transmission lines and buses. In addition, the weight of ea...

The distribution system's economic operation is significantly impacted by the management of distributed generation (DG) resources, energy storage (ES), and controllable loads. The paper employs a smart distribution system that incorporates dispatchable and non‐dispatchable DG resources, as well as battery storage, in addition to the demand response...

Recent major achievements in power electronic technologies have expedited the development and proliferation of small-scale distributed generations (DGs). AC-DC distribution network creates a novel paradigm to attain the utmost benefits through smoothing the operation of different types of DGs. However, due to the asymmetrical electrifying of single...

In future power systems, local energy networks (LENs) as one of the main infrastructures will have a key role in the realization of transactive energy (TE) exchange between involved players. In order to adopt this environment fully accessible to trade energy competitively between participants, the connectivity level of the network should be always...

Electric distribution networks have to deal with issues caused by natural disasters. These problems possess unique characteristics, and their severity can make load restoration methods impotent. One solution that can help in alleviating the aftermath is the use of microgrids (MGs). Employing the cumulative capacity of the generation resources throu...

Active electricity distribution systems (AEDS) play an important role on the social welfare that is highly relies on the reliability of these systems. In this regard, maintenance management tries to decrease component failures via repairing component that are more possible to be failed in operation time. In this manuscript, a stochastic MINLP maint...

This paper studies electric vehicle (EV) charging coordination in the presence of uncertainty. Considering that EVs usage are of considerable uncertainties, first, a probabilistic mechanism to model driving and charging patterns of EV owners utilizing Markov chain Monte Carlo (MCMC) is presented. Then a model predictive control (MPC) approach named...

Abstract An effective way to improve distribution system reliability is to place switches and protective equipment in the optimal location. Commonly, in the placement problem, the use of equipment in the designated location is assumed to be possible. But in practice, to establish protection coordination between the equipment, it is necessary to rem...

Vulnerability mitigation is the solution for creating resilient distribution networks aims to prevent the uncontrollable outage propagation. This paper presents a new resilience index as a powerful tool to enhance the resilience of distribution systems against extreme hurricane events. The suggested framework provides a comparative study for optima...

Nowadays, the deployment of micro-grids (MGs) is one of the important trends in modern distribution network planning. Implementing this strategy aims to improve the ability of the distribution network to withstand extreme weather conditions and supplying critical loads. While the literature has focused chiefly on operating distribution systems and...

This paper introduces a three-stage resilience improvement scheme to enhance operational power system resilience against a hurricane event. As a prerequisite for implementing this scheme, the hurricane impact on the power system is modeled using a stochastic model in which a set of transmission line failure scenarios is generated. This scheme is co...

This article presents a mathematical model for optimal planning and scheduling of smart homes' energy hubs (SHEHs). The electricity demand of the SHEH model is formulated and categorized into four different loads: lighting loads, delay intolerant loads (DILs), delay tolerant loads (DTLs), and other electrical loads (OELs). The SHEH also includes he...

This paper presents a comprehensive approach to improve the daily performance of an active distribution network (ADN), which includes renewable resources and responsive load (RL), using distributed network reconguration (DNR). Optimization objectives in this work can be described as (i) reducing active losses, (ii) improving the voltage prole, (iii...

Paying attention to the modularity feature of electric distribution systems improves their performance against severe events and makes an outstanding opportunity for resiliency enhancement. In this paper, a novel framework based on the modularity concept is proposed in which, by deploying smart grid technologies and forming efficient modules, effec...

Technological progress of distributed generation (DG) units, global approach to reduce the pollution emissions, and creating the opportunity for local investors to participate in the generation expansion investment, are some of the important reasons to involve the DG as an alternative option in the GEP. In this regard, expansion of the DG units com...

Reliability improvement is a fundamental issue in electric distribution network (EDN) operation. In this regard, providing the most efficient maintenance policy can dramatically assist the electric utility companies in reducing the failure rate of EDN components. In the present study, a novel probabilistic reliability‐centred maintenance (RCM) appr...

Sustainability of power systems is a vital need for modern societies. The occurrence of extreme weather events, such as hurricanes, may lead to blackouts. Hence, power systems resilience is a critical issue for experts. The main focus of this paper is on how to assess power system resilience comprehensively. In this regard, a two-stage framework is...

This paper presents a comprehensive approach to improve the daily performance of an active distribution network (ADN), which includes renewable resources and responsive load (RL), using distributed network reconfiguration (DNR). Optimization objectives in this work can be described as (i) reducing active losses, (ii) improving the voltage profile,...

This article proposes a novel short-term decision-making model for electricity retailers within the electricity market and in the presence of Demand Response Aggregators (DRA). In this framework, retailers provide their required energy through the Day-ahead market, Real-time market and forward bilateral contracts. On the other hand, retailers parti...

The advent of distributed energy resources (DERs) in distribution networks, referred to as active distribution networks (ADNs), brings in new opportunities for distribution network operators (DNOs) to improve the network reliability. The contribution of DERs in reliability enhancement generally depends on the island mode operation of DERs. Optimal...

Plug‐in electric vehicles (PEVs) are considered as innovative solutions to achieve sustainable development. The installation of PEV parking lots is the main requirement for using PEVs. Another requirement is the expansion of the distribution system to meet a portfolio of demands with different attributes including parking lots. In this study, an in...

Condition Based Maintenance (CBM) using inspection data is one of the available maintenance approaches for power system equipment. In Inspection Based Maintenance (IBM) as a specific type of CBM, decisions about the time and type of the maintenance tasks are made after determining the deterioration condition of the equipment. In this paper, an IBM...

Distribution networks are energy sectors that usually deal with residential energy consumers whose expectations associated with voltage quality and other relevant issues should be taken into account. There are various factors that might threaten reliable/economic performance of the distribution networks. In this paper, optimal reconfiguration of di...

To achieve an adequate level of integration, microgrids are facing challenges in three fronts; technical, financial and regulatory. In this study, a comprehensive study was carried out to investigate the main financial deficiencies and shortcomings faced by microgrids in their way to reach a grid-scale penetration. Accordingly, a systematic approac...

Currently the number of Microgrids (MGs) is continuously increased in distribution network. In this view, the future advanced distribution network can be regarded as clusters of MGs. Hence the MGs is the building blocks of smart distribution networks. There are many technical, economic and social reason for MGs implementation. One of the main advan...

Determining the penetration level of the distributed generation (DG) is an effective tool to site and size DGs in distribution networks. A multiobjective function of optimizing the DG penetration level, subject to constraints including short circuit capacity, voltage limits, transformer capacity, reverse power flow, and congestion of lines, is intr...

To achieve an adequate level of integration, microgrids are facing challenges in three fronts; technical, financial, and regulatory. In this study, financial flows of microgrid investment are explored and using an economic viability analysis the financial aspects of microgrid investment as business options are discussed. Finally, while assessing th...

The resilience assessment of complex and large-scale systems such as electrical power systems has becoming an inseparable part in analysing the reliable performance of the systems in the presence of high-impact, low-probability (HILP) incidents, such as extreme natural disasters. Considering the application of the resilience in various domains, the...

This chapter presents an approach for Integrated Distributed Generation and primary-secondary network Expansion Planning (IDGNEP) in the presence of wholesale and retail markets. The presented method uses a unified model to explore the impacts of retail market participants on the IDGNEP procedure. While the theory and practice of IDGNEP have advanc...

Due to the unique structure and special characteristics of electric distribution networks, along with the increase in the number and severity of the natural disasters in recent years, presenting a proper framework and procedure for evaluating the resiliency of these systems is more essential. In addition, it is obligatory to model the different cap...

This paper presents an active distribution network expansion planning framework, which concurrently uses the renewable distributed generations and energy storage systems as capacity expansion options. In order to enhance the network reliability, the model takes into account the island mode operation of the renewable resources and energy storage sys...

This paper presents a robust nonlinear integrated controller to improve stability of hybrid AC/DC micro-grids under islanding mode. The proposed controller includes two independent controllers where each one is responsible to control one part of the system. First controller will improve the stability of input DC/DC converter. Using this controller,...

Distributed Energy Resources (DERs) play a key role in the Active Distribution Networks (ADNs) with environmental concerns. Their small scales and the uncertainty pertaining to intermittent generation of renewable resources are the major challenges of participating in the wholesale electricity markets. Based on the concept of Virtual Power Plant (V...

To achieve economic stability, distribution Company as an economic institution should be managed by various processes. In this way, knowledge of different processes is the first step. Furthermore, expectations, outputs, requirement data, and sub-processes should be extracted and determined. Accordingly, to assign the performance responsibility of e...

The development and installation of DGs in distribution power networks have turned these networks from passive into active ones in power systems. Proper management and control of these resources can help to improve power quality and increase the security and effectiveness of power networks. The energy management of DGs considering their operating c...

Implementing microgrids in power systems will improve the network reliability and reduce the impact of outages on end-users. Determining the most efficient boundaries of microgrids under contingencies is one of the main challenges for utilities from reliability and economics points of view. Currently, most research works have been focused on predef...

Future distribution systems will accommodate an increasing share of distributed energy resources (DERs). Facing with this new reality, virtual power plants (VPPs) play a key role to aggregate DERs with the aim of facilitating their involvement in wholesale electricity markets. In this paper, the trading strategies of a VPP in cooperation with its n...

We study the tradeoff between the sum rate and the error probability in downlink of wireless networks. Using the recent results on the achievable rates of finite-length codewords, the problem is cast as a joint optimization of the network sum rate and the per-user error probability. Moreover, we develop an efficient algorithm based on the divide-an...

We study the tradeoff between the sum rate and the error probability in downlink of wireless networks. Using the recent results on the achievable rates of finite-length codewords, the problem is cast as a joint optimization of the network sum rate and the per-user error probability. Moreover, we develop an efficient algorithm based on the divide-an...

Self-healing capability as one of the most important features of smart distribution networks (SDN) causes an increase in the resiliency and flexibility of networks by responding fast and restoring service during an outage. A two-layer algorithm based on metaheuristics is proposed for the optimal operation of smart distribution network in self-heali...

Background: Low emission, high efficiency, and convenience of using plug-in electric vehicles (PEVs) are considered as significant benefits of PEVs. However, installation of parking lots (PLs) in order to supply PEVs causes some financial and technical challenges for electric distribution networks. The changes in system reliability, power loss, vol...

Hybrid AC/DC distribution systems are rapidly growing due to the recent developments in power electronic technologies and increasing deployment of DC output type distributed generations (DGs) in distribution voltage levels. The presence of DGs in DC distribution systems imposes new challenges in load flow calculations. In response, this paper is de...

Multiple microgrid (MMG) operation concept of community microgrid (MG) provides enhanced resiliency and reliability through self-healing, enabling a high penetration of distributed generations (DGs), power interchange between MGs and realtime communication. In this study, the methodology of optimal design of low-voltage greenfield distribution grid...

Solar and wind energy as free and eco-friendly sources of energy have been considered a promising choice for remote (or rural) area electrification. While a fuel-cell system makes a clean backup available, incorporating both energy type and power type storage technologies, such as batteries, hydrogen-based storage systems, and supercapacitors, exte...

One of the distribution network operators’ (DNOs’) responsibilities is to design distribution networks in order to reliably and efficiently meet a portfolio of demands with different attributes. The advent of plug-in electric vehicles (PEVs) introduces a number of new network players such as girdable parking lot owners (GPLOs), which might have con...

The neoteric AC/DC distribution networks are becoming more practical and cost-effective for several reasons such as high penetration of DC distributed generations (DGs) and also ever-increasing growth of sensitive DC electronic loads. Using these networks eliminates some required conversion stages which result in reduced costs and better power qual...

Increasing integration of local generators is a challenge in the planning, design, and operation of the distribution system. The distributed energy resources, especially renewable ones, have caused dispersion of generation units along the feeder. This paper presents a dual index combination of the penetration level and the dispersion factor of dist...

Development of renewable energies and DC loads have led microgrids toward the creation of DC networks. The predictions show that the hybrid microgrids will be used widely in the future. This article has studied the voltage stability in the presence of sources of energy storage in AC/DC hybrid networks. However, because the different dynamics of hyb...

In distribution systems, feeder reconfiguration (FR) can lead to loss reduction, reliability improvement and some other economic savings. These advantages can be intensified by proper control and switching of Capacitor Banks (CBs). In this paper, using Ant Colony Optimization (ACO) technique, a novel method is proposed for simultaneous dynamic sche...

Undesired trip operation of zone 3 units of distance relays in power transmission network, during static and dynamic load encroachment can lead to cascading failures and even catastrophic power system blackouts. Stressed conditions such as power flow redistribution and power swing can cause maloperation of the third zone of distance relays. Fast an...

This paper aims to design and control a standalone hybrid renewable system, comprising PV panels and wind turbines as the main energy sources along with a fuel-cell stack as a support system. In this paper several energy management strategies are designed, simulated and their performance is compared. The energy management strategies taken into acco...

In this paper, cooperation of several microgrids (MGs) in smart distribution networks is addressed. To investigate the behavior of MGs, a bi-level optimization model is presented. In the proposed bi-level model, MGs and distribution company (Disco) are considered as the leader and the followers, respectively. MGs decide about optimal scheduling of...

This paper studies the outage probability and the throughput of amplify-and-forward relay networks with wireless information and energy transfer. We use some recent results on finite block-length codes to analyze the system performance in the cases with short codewords. Specifically, the time switching relaying and the power splitting relaying prot...