Magdi El-Saadawi
Mansoura University, Electrical Engineering, Faculty Member
- Magdi M. El-Saadawi was born in Mansoura, Egypt in 1959. He received his B.Sc. and M.Sc. from Mansoura University, Eg... moreMagdi M. El-Saadawi was born in Mansoura, Egypt in 1959. He received his B.Sc. and M.Sc. from Mansoura University, Egypt in 1982 and 1988, respectively, and his Ph.D. from Warsaw University of Technology in 1997. He was a teaching assistant at El-Mansoura University from 1983–1992. From 1997, he was a staff member of the Electrical Engineering Department, Mansoura University, and has been a professor since May 2011. He was the Head of Electrical Engineering Department in Mansoura University from 2011 to 2012 His research interests include, Renewable Energy, Distributed Generation and Power System Analysis.edit
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Voltage imbalance (VI) is caused by the difference in connected single-phase load or generation in a low voltage distribution network (DN).VI increase in a smart distribution grid is due to the current practice of increasing single-phase... more
Voltage imbalance (VI) is caused by the difference in connected single-phase load or generation in a low voltage distribution network (DN).VI increase in a smart distribution grid is due to the current practice of increasing single-phase distributed generators such as photovoltaic (PV) systems. This paper proposes a decentralized control method to mitigate VI using distributed batteries included in smart grid interfaced residential PV systems. To mitigate VI using the batteries in this way, five challenges must be overcome, i.e., equalizing all battery stress currents within the DN, mitigating VI in abnormal conditions such as signal loss among bus controllers, being immune from the distorted feedback measurements, minimizing the steady-state error at different loads, and overcoming the insufficient number or capacity of the distributed batteries at the same bus. Three fuzzy logic controllers (FLC) are proposed at each bus to overcome these five tasks based on a decentralized contro...
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The zonal DC Voltage shipboard microgrid has many issues in terms of the protection side. A novel adaptive pilot, DC distance protection scheme, is proposed in this paper for DC zonal shipboard microgrid to make the system more reliable,... more
The zonal DC Voltage shipboard microgrid has many issues in terms of the protection side. A novel adaptive pilot, DC distance protection scheme, is proposed in this paper for DC zonal shipboard microgrid to make the system more reliable, selective, and rapidly detect the fault. The proposed scheme is based on three stages. Firstly, it detects whether there is a fault in the system by applying the Fourier transform (FT) method to analyze the voltage and current measurements. Secondly, the fault location is detected by determining which line has the fault and selecting the proper zone for each relay. Thirdly, communication signals are sent between the two pilot relays for accurate fault localization before sending the tripping signals to the associated circuit breakers (CB) and isolating the fault. The 0.3 kV DC zonal shipboard microgrid is simulated in MATLAB/Simulink environment. The results prove that the proposed scheme is accurate and efficient in detecting and localizing the fault by providing backup protection depending on the different zones of distance relay.
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Microgrids can operate in two modes, grid-connected and islanded modes. The flexible operation of the microgrid in islanded mode depends on the reliable and perfect control system, therefore, the emphasis and difficult of the microgrid... more
Microgrids can operate in two modes, grid-connected and islanded modes. The flexible operation of the microgrid in islanded mode depends on the reliable and perfect control system, therefore, the emphasis and difficult of the microgrid research is the system control problems. It so important to apply an efficient control method to adjust the system voltage and frequency under the islanded operation of microgrid. Droop control is one of the simpler method to control the voltage and frequency under this case. It can be used to adjust the system voltage and frequency to their acceptable limits. Unfortunately, this method is not so accurate in maintaining the system voltage and frequency close to their nominal values. This paper presents a proposed modified V/f droop control method for Microgrids in Islanded mode. The method applies H∞ with the droop controller to adjust the system voltage and frequency to their nominal values. The proposed method is verified by applying it to a test system simulated in Matlab/Simulink environment. The comparison between the conventional and the proposed method prove that the proposed method is more efficient in controlling microgrid under islanded mode of operation.
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This paper investigates the effect of over voltage mitigation techniques on line power loss of three-phase four-wire distribution network with rooftop photovoltaic (PV) system. Based on PVs ratings, loads and unbalance conditions, the... more
This paper investigates the effect of over voltage mitigation techniques on line power loss of three-phase four-wire distribution network with rooftop photovoltaic (PV) system. Based on PVs ratings, loads and unbalance conditions, the network is modeled using backward-forward sweep method under MATLAB software environment. Active Power Curtailment (APC), Reactive Power Control (RPC), Active Power Dependent on reactive power (APD), On Load Tap Changer (OLTC) and Static Transfer Switch (STS) are applied to the test network model. The simulation results are used to evaluate the line power loss in each technique.
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Harmonics is one of the major disturbances that affect the power quality of electric utilities. Many techniques were used to analyze the harmonics in power systems. These techniques generally have difficulties in determining the... more
Harmonics is one of the major disturbances that affect the power quality of electric utilities. Many techniques were used to analyze the harmonics in power systems. These techniques generally have difficulties in determining the collective impact of distributed harmonic sources. This paper introduces a proposed methodology for analyzing harmonics in distribution systems with distributed harmonic sources. The method takes into account the effect of diversity and attenuation. The method is illustrated through a numerical application applied on a real distributor.
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Shipboard microgrids (SBMGs) are becoming increasingly popular in the power industry due to their potential for reducing fossil-fuel usage and increasing power production. However, operating SBMGs poses significant challenges due to... more
Shipboard microgrids (SBMGs) are becoming increasingly popular in the power industry due to their potential for reducing fossil-fuel usage and increasing power production. However, operating SBMGs poses significant challenges due to operational and environmental constraints. To address these challenges, intelligent control, management, and protection strategies are necessary to ensure safe operation under complex and uncertain conditions. This paper provides a comprehensive review of SBMGs, including their classifications, control, management, and protection, as well as the most recent research statistics in these areas. The state-of-the-art SBMG types, propulsion systems, and power system architectures are discussed, along with a comparison of recent research contributions and issues related to control, uncertainties, management, and protection in SBMGs. In addition, a bibliometric analysis is performed to examine recent trends in SBMG research. This paper concludes with a discussi...
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Different energy requirements of the residential sector are varied, such as electricity, heating, cooling, water, etc., and these necessities are met by multi-energy systems using various energy sources and converters. In this paper, an... more
Different energy requirements of the residential sector are varied, such as electricity, heating, cooling, water, etc., and these necessities are met by multi-energy systems using various energy sources and converters. In this paper, an optimal day-ahead operation of a large residential demand sector is presented based on the energy hub (EH) model with combined heat and power (CHP) as a cogeneration system. The purpose of the optimization is to maximize social welfare (SW) and minimize environmental emissions subjected to numerous technical constraints. To explore the effectiveness of the proposed model, real cases were studied and results were analyzed. Moreover, to evaluate the efficiency of the proposed methodology, the Archimedes optimization algorithm (AOA) is implemented for optimizing the EH system. The performance of the AOA is compared with the genetic algorithm, and the results depict that the AOA is better in terms of convergence speed and global search ability. Implement...
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Grid connected electric vehicles (EVs) can provide energy quality services to ease intermittent renewable energy sources dependent, enhance grid stability performance, reliability and load balancing in the power system. Moreover,... more
Grid connected electric vehicles (EVs) can provide energy quality services to ease intermittent renewable energy sources dependent, enhance grid stability performance, reliability and load balancing in the power system. Moreover, incorporating sufficient EVs into the power grid will assist reduce greenhouse gases. However, the unrestrained EVs charging impact the raise of peak request, frequency deflection, voltage instability, power quality from the acceptable limits. It can also cause overloading of the power system equipment and an increase in power losses. In this paper, the influences EV technologies on various energy systems, control scheme strategy, benefits, and motivational challenges are investigated. An overview of the impacts of uncontrolled EV loading on the electric power system and how controlled charging becomes benefit impacts is presented. Moreover, a review of the controlled charge and discharge benefits of EVs and the electrical serving involved in reduction of f...
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A Chatbot is a conversational software agent, which interacts with users using natural language such as English or Arabic. Many Chatbots exist, with different knowledge-bases, programmed by the Chatbot builders. Reviews of relevant... more
A Chatbot is a conversational software agent, which interacts with users using natural language such as English or Arabic. Many Chatbots exist, with different knowledge-bases, programmed by the Chatbot builders. Reviews of relevant research show that there is a shortage in Arabic Chatbots. The purpose of this study is to propose a framework of an intelligent Arabic-based Chatbot to teach Islamic history, which can be used to create an Arabic Chatbot like human. The study presents an application on the use of the proposed Chatbot for teaching Prophet Muhammad Life (Seerah).
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Abstract: Particle swarm optimization technique (PSO) is a promising evolutionary technique. Setting initial values of that technique depend on every domain of application. These values are chosen randomly in classic PSO technique which... more
Abstract: Particle swarm optimization technique (PSO) is a promising evolutionary technique. Setting initial values of that technique depend on every domain of application. These values are chosen randomly in classic PSO technique which increases the ...
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Page 1. A Proposed Reactive Power Controller for DG Grid Connected Systems MS Kandil MM El-Saadawi AE Hassan KM Abo-Al-Ez Mansoura University Department of Electrical Engineering PO Box 35516, Mansoura, Egypt ...
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Over the last 100 years, no change has been in the power grid infrastructure. Through experiments, it became clear that the top-down central power grids are not suited to the needs of the twenty-first century. The new energy revolution by... more
Over the last 100 years, no change has been in the power grid infrastructure. Through experiments, it became clear that the top-down central power grids are not suited to the needs of the twenty-first century. The new energy revolution by considering multi-energy carriers, not just electricity, represents an opportunity to improve the system and will have a revolutionary impact on the future power grids. To meet current power grid challenges, a new concept of the energy hub has emerged. The energy hub can be considered as a modern electric power grid infrastructure that contains different types of energy sources and generation with multi-type energy storage devices to feed electrical, heating and gas demands. The new energy hub needs a more complex and different one, because its size is much larger, while traditional energy systems rely on a strong infrastructure of information and communication. This paper focuses on critical issues related to technologies of energy hub in the firs...
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Steady state analysis of wind turbine generating units (WTGUs) interconnected with the grid is needed as the use of WTGU are getting more popular and many new systems are being planted. In this paper, probabilistic voltage stability... more
Steady state analysis of wind turbine generating units (WTGUs) interconnected with the grid is needed as the use of WTGU are getting more popular and many new systems are being planted. In this paper, probabilistic voltage stability algorithm of WTGUs interconnected with the utility grid is developed via power Moy analysis where these units are modeled as P-Q bus(es) by detecting the collapse p oint on the Q-V curves. The developed algorithm also facilitates the computation of both the real and reactive power output of the fixed speed pitch regulated wind turbine at a specific site, wind turbine characteristics, wind speed and terminal voltage. The probabilistic nature of wind is considered by introducing the expected voltage stability margin is an index that combines both of the voltage stability and the wind distribution in one index. The proposed algorithm is implemented and applied on the IEEE 26-bus, voltage stability margin (VSM), and expected voltage stability margin (EYSM) a...
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A Microgrid (MG) is a part of the power system that consists of loads, distributed generations (DGs), and energy storage units. It operates in On-grid or Off-grid modes. When a microgrid operates in an Off-grid mode, its voltage and... more
A Microgrid (MG) is a part of the power system that consists of loads, distributed generations (DGs), and energy storage units. It operates in On-grid or Off-grid modes. When a microgrid operates in an Off-grid mode, its voltage and frequency must be adjusted to prescribed acceptable limits. This paper introduces a comprehensive review of research studies related to the available control schemes used in microgrids. The control methods are divided into three categories. The first category includes classical control methods that apply a conventional control method to adjust MG parameters. The second category is adaptive control methods to control the system parameters. The last category is the intelligent control methods that modify the classical control methods by applying one of the intelligent control methods. This paper presents a brief comparison between these control methods based on the method description, merits and demerits of each method and it gives a brief description of t...
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Abstract The second harmonic restraint method is the most common technique used by relay manufacturers to discriminate between inrush and fault currents. Unfortunately, many relays in the Egyptian distribution networks are old versions... more
Abstract The second harmonic restraint method is the most common technique used by relay manufacturers to discriminate between inrush and fault currents. Unfortunately, many relays in the Egyptian distribution networks are old versions digital overcurrent relays that don't contain the second harmonic restraint method. In developing countries like Egypt, replacing a large number of conventional relays at one time may not be possible due to difficult economic conditions. This paper proposes a novel inexpensive solution by incorporating an additional circuit with the old version over-current relays. The proposed circuit applies a second harmonic restraint function for detecting the inrush currents as in the modern digital relays. The modified overcurrent relay is applied to a test system picked from North Delta Electric Distribution Company (NDEDC) Network in Egypt. The results demonstrate the successful operation for the proposed circuit along with the overcurrent relay in normal operation, switching cases, permanent faults, and in case of faults during energization. Furthermore, the proposed circuits integrated with old version overcurrent relays are successfully tested and verified in the presence of grid-connected Distributed Generation (DG) for both switching and fault operation modes. Also, it provides a cost-effective solution for the old version digital overcurrent relay in NDEDC.
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Verification of Synchronous Generator Model. (PDF 3520 kb)
Electric vehicles (EV), connected to the power grid, serve as distributed load or energy storage. In weak power grids, integration of Electric vehicles as energy storage provides many services such as power quality improvement, effective... more
Electric vehicles (EV), connected to the power grid, serve as distributed load or energy storage. In weak power grids, integration of Electric vehicles as energy storage provides many services such as power quality improvement, effective power control, and frequency regulation. On the other hand, the EV plug-in/off to a weak grid as a distributed load can result in poor power quality issues such as unacceptable frequency deviation. In this paper, a proposed control/operation strategy is presented to improve the frequency stability of a weak grid connected to EVs. It is proposed to use the EV to improve the frequency deviation during the plugin EV as a distributed load (charging mode) and/or as a storage device (discharging mode).Furthermore, a smart plug off strategy is proposed in order to disconnect the EV from the weak grid without frequency interruption. The proposed system is simulated in Matlab environment and a comparison between the system with and without the proposed Elect...
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Received: (21 May, 2021) Revised: (19 June, 2021) Accepted: (23 June, 2021) *Corresponding Author: Eid Abdelbaki Gouda, associate professor at Electrical Engineering Department, Faculty of Engineering, Mansoura University, (email:... more
Received: (21 May, 2021) Revised: (19 June, 2021) Accepted: (23 June, 2021) *Corresponding Author: Eid Abdelbaki Gouda, associate professor at Electrical Engineering Department, Faculty of Engineering, Mansoura University, (email: eaidgoda@mans.edu.eg.) Ahmed Abd-Alaziz, is with Electrical Engineering Department, Faculty of Engineering, Mansoura University, (email: aaabdalaziz91@gmail.com .) Magdi El-Saadawi, professor at Electrical Engineering Department, Faculty of Engineering, Mansoura University, (email: m_saadawi@mans.edu.eg) Moreover, EES systems can reduce costs, improve efficiency and provide a backup resource of renewable energy systems. In this paper, Compressed Air Energy Storage (CAES) is explored as a large-scale EES that can be designed for a high amount of energy at a high rate. The CAES is based on converting energy into a pneumatic type in pressure vessels or caverns, which are used to regenerate electricity whenever it is required. CAES system is not only friendly ...
Photovoltaic (PV) water-pumping systems have considerable cost-effective value in rural zones. Virtual flow rate (VFR) meter is a technique to measure the water flow rate through a water pump using a numerical method as a function of the... more
Photovoltaic (PV) water-pumping systems have considerable cost-effective value in rural zones. Virtual flow rate (VFR) meter is a technique to measure the water flow rate through a water pump using a numerical method as a function of the pump head, motor power, and overall efficiency of the pump. VFR meter eliminates the need for rotor speed sensors in PV water pumping systems. In this paper, the virtual flow meter is proposed as a novel reference for improving maximum power point tracking (MPPT) algorithms for PV water-pumping systems. VFR meter removes the expensive flow meter sensors, hence, reducing the overall costs of the system. The VFR will be represented as a new variable in the MPPT algorithm. By replacing the voltage with the instantaneous VFR, the system will operate based on the variation of the VFR meter measurements. Using the physical parameters of a submersible Brushless DC motor pump-based PV water-pumping system, a mathematical model is derived to obtain the input...
