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Conference Paper
Shafei, M. A. R., D. K. Ibrahim, A. El-Zahab, E. El-Din, and M. A. A. Younes, "Biogeography-Based Optimization Technique for maximum power tracking of hydrokinetic turbines", Renewable Energy Research and Application (ICRERA), 2014 International Conference on: IEEE, pp. 789–794, 2014. Abstract

Hydrokinetic energy, referring to the energy contained in moving water, is a renewable energy source that gained much consideration in the past years and expected to play a significant role in the future. The energy is initiated in all moving water masses, but is significantly economic to convert for water masses moving with high velocity. Nonlinear characteristics of water speed and generator model in hydrokinetic energy conversion systems require an optimal controller for achieving optimal performance and high efficiency of the system. Here, the field oriented control method is proposed to set the PI controllers which their coefficients are optimized based on Biogeography- Based Optimization technique (BBO). In order to use BBO to solve this problem, the problem has to be formulated as an optimization problem. Numerous simulation studies are carried out to verify the effectiveness of the proposed controller scheme. Achieved results for different patterns of water speed changes in time domain show the capability of the proposed control.

Mohamed, M. S., M. A. R. Shafei, A. A. Mansour, and D. K. Ibrahim, "Coils design and parallel resonant H-bridge inverter for inductive power transfer to recharge low-power portable devices", 21st International Middle East Power Systems Conference, MEPCON , Tanta University, Egypt, December 17-19, 2019. Abstract

The capability of the inductive power transfer (IPT) for wireless charging mainly depends on both coil structure and inverter topology. The paper presents the resonant inverter based on the concept of energy injection and free oscillation which are applied to increase the resonant frequency without raising the switching frequency. The implemented inverter utilizes the variable frequency zero current switching (ZCS) control strategy for parallel configuration that ensure the high operating frequency at multiplies of the inverter switching frequency. Consequently, it will result in decreasing the inverter switching loss and also reducing the coil size that operates at resonant frequency. The coil design methodology is introduced in details while studying the different factors affecting the coil behavior. The performance of the overall designed system is evaluated via simulation tests carried out using ANSYS Maxwell and MATLAB SIMULINK.

Afifi, M. K., H. M. Sharaf, M. M. Sayed, and D. K. Ibrahim, "Comparative Study between Single-Objective and Multi-Objective Optimization Approaches for Directional Overcurrent Relays Coordination Considering Different Fault Locations", 13th IEEE PES PowerTech Conference, Milano, Italy, 23-27 June 2019. Abstract

In this paper, a comparative study of single-objective and multi-objective optimization approaches for directional overcurrent relays (DOCRs) coordination is presented. Singleobjective optimization approach is investigated using two methods; the fmincon function which is the gradient-based method, while the second method is the Genetic Algorithm which is a meta-heuristic technique. Multi-objective optimization approach is investigated using fmincon function and Goal Attainment method. All the methods are available in the MATLAB Optimization Toolbox. Different fault locations on the meshed power distribution network of the IEEE 14 bus system are considered for the investigated methods. The results of singleobjective and multi-objective approaches are compared regarding total relays operating times, mean fault clearing time, maximum primary and backup relays operating time and maximum coordination time interval. The results show that using the multi-objective optimization approach in solving the DOCRs coordination problem achieved less total relays operating time and coordination time intervals which ensure faster fault clearing.

Ibrahim, D. K., E. E. - D. A. El-Zahab, and A. Galal Ahmed, "Comprehensive Fault Location Scheme for Power Transmission lines", 16th International Middle East Power Systems Conference, MEPCON 2014, 2014. Abstract

A comprehensive two-terminal impedance based fault location scheme is presented in this paper which takes into account the distributed parameter line model. The scheme utilizes unsynchronized measurements of voltages and currents from the two ends of a line. The synchronization angle is calculated using symmetrical components transformation theory. The proposed scheme integrates several fault location algorithms. In one of them, Takagi method is used taking into account the effect of distributed capacitance when the communication link between sending end and receiving end fails.
Another algorithm is embedded in the proposed scheme to accurately locate ground and phase nonlinear high impedance faults using zero and negative sequence currents gathered from the two terminals within a maximum time of 2 cycles. The proposed fault-location scheme has been thoroughly tested using ATP versatile simulations of faults on transmission lines. The presented evaluation shows the validity of the developed fault-location scheme and its accepted accuracy.

Ibrahim, D. K., A. Ibrahim, and I. Hussein Ammar, "Dynamic Voltage Restorer for Deep Voltage Sags and Harmonics Mitigation in Industrial Plant with Sensitive Loads", 16th International Middle East Power Systems Conference, MEPCON 2014, 2014. Abstract

Dynamic Voltage Restorer (DVR) is a fast, flexible and efficient solution for voltage sag problem. It is a power electronic based device that used to compensate voltage sags and harmonics. The DVR has different system topologies for compensation by using battery as an energy storage unit or by using shunt and series converters. In this paper, the DC-DC boost converter is used to connect between shunt and series converters, which allows the DVR to compensate deep sags for long durations. A real case study of Egyptian industrial plant includes a lamp factory as a sensitive load is modeled and simulated using MATLAB/SIMULINK environment to test the effectiveness of using different system topologies of DVR: a battery, shunt and series converters, and finally shunt and series converters with boost converter. Satisfactory performance is achieved using the topology of using shunt and series converters with boost converter for compensating deep voltage sags and harmonics. The financial assessment of using DVR is also investigated.

Ahmed, M. A., D. K. Ibrahim, and M. Gilany, "Electric Spring Technology in Small Scale Residential Microgrid", 21st International Middle East Power Systems Conference, MEPCON, Tanta University, Egypt, December 17-19, 2019. Abstract

Energy communities worldwide and in Egypt specifically encourage the household customers toward the renewable energy investment by utilizing grid-connected renewable generators (i.e. PV and wind turbines). Grid stability and power quality become the major concerns for the grid operators as they are too much affected during the increasing penetration of distributed renewable generators and also the growth of non-linear loads at end users. Electric spring (ES) technology is recently applied as distributed voltage controllers intended to stabilize the electrical grid in the presence of the distributed generators and the non-linear loads of the consumers. Consumers' satisfaction towards the grid stability is very essential as most of the household applications include sensitive loads that require a clean power with definite voltage value. This paper analyzes and verifies the electric spring technology in a household application with a renewable energy investment through a grid-connected PV panel, while a standby diesel generator operates in case of utility failure. The proportional-integral (PI) controller of ES has been successfully optimized using a genetic algorithm. A developed MATLAB/SIMULINK model is tested under a real household loading curve, typical PV generation profile in sunny/cloudy days, dynamic response of the standby diesel generator, and the utility disturbances (i.e. voltage decrease, increase, and fluctuation). For all aforementioned tested disturbances, the ES has succeeded to stabilize the voltage for the household sensitive appliances (e.g. computers, TV, washing machine, etc.).

Afifi, M. K., H. M. Sharaf, M. M. Sayed, and D. K. Ibrahim, "Enhanced Two-Fault Point Multi-Objective Coordination Scheme for Directional Overcurrent Relays in Meshed Distribution", ", 21st International Middle East Power Systems Conference, MEPCON , Tanta University, Egypt, December 17-19, 2019. Abstract

in this paper, an enhanced directional overcurrent relays (DOCRs) coordination scheme is introduced. The proposed scheme considers the fault severity by applying weighting factors, calculated based on system fault currents at different locations in each relay zone of protection. This enhanced coordination reduces the operating time of the relays for severe fault currents avoiding the greater thermal and mechanical stresses that reduce equipment lifetime. The DOCRs coordination problem is formulated as a multi-objective optimization problem to accomplish better results than the single-objective methodology with respect to relays selectivity and speed. DOCRs coordination problem is solved using Goal Attainment method in MATLAB Optimization Toolbox. A two-fault point coordination scheme is applied to IEEE 14 bus system for both the conventional and the proposed scheme. The results are analyzed according to several system performance indices including: the mean of the system’s relays operating times, the maximum primary relay operating time, the maximum backup relay operating time and maximum coordination time interval (CTI) between primary/backup pairs. The achieved results indicated that the proposed scheme considering the severity weighting factors has reduced the mean operating time of relays especially for the relays with faults with high severity. It means more reliable, faster protection system with less thermal and mechanical stresses for system equipment.

Saleh, S. M., and D. K. Ibrahim, "Fault Detection Technique of High Impedance Faults in EHV Transmission Lines Using Combined Wavelet Transform and Prony’s Method", 16th International Middle East Power Systems Conference, MEPCON 2014, 2014. Abstract

High impedance faults (HIFs) are difficult to detect by conventional protection devices such as distance and
overcurrent relays. This paper presents a scheme for high impedance fault detection in extra high voltage transmission line by recognizing the distortion of the voltage waveforms caused by the arcs usually associated with HIFs. The proposed scheme is based on combined wavelet transform and Prony’s method. The discrete wavelet transform (DWT) based analysis, yields three phase voltages in the high
frequency range which are fed to a classifier for pattern recognition and also fed to the Prony’s method for correct discriminating of switching with and without fault cases. The classifier is based on an algorithm that uses a recursive method to sum the absolute values of the high frequency signal generated over one cycle by shifting one sample, while switching cases discrimination is based on Prony’s amplitude changing
with time. Characteristics of the proposed fault detection scheme are analysed by extensive simulation studies that clearly reveal that the proposed scheme can accurately detect HIFs in the EHV transmission lines. Results of extensive simulations using ATP/EMTP on 500 kV Egyptian transmission line clearly reveal that the proposed scheme can accurately detect HIFs in the EHV transmission lines systems as well as its ability to discriminate clearly between HIFs and various switching conditions.

Magdy, M., M. Elshahed, and D. K. Ibrahim, "Impacts of Distributed and Centralized Grid- Connected PV on Radial Distribution Networks", 21st International Middle East Power Systems Conference, MEPCON, Tanta University, Egypt, December 17-19, 2019. Abstract

This paper investigates the impacts of the centralized and distributed grid-connected photovoltaic systems on radial distribution networks. Different weather conditions are considered. Different PV penetration levels are investigated in both centralized and distributed PV configurations. Daily simulation is performed using the Open Distribution System Simulator (OpenDSS). The study will include the impacts on voltage magnitude, the voltage regulators, the voltage unbalance factor and losses during the day. The simulations results are presented in details and conclusions are drawn based on them.

Ibrahim, D. K., E. E. - D. A. El-Zahab, and M. Essam Mohamed, "Improving Distance Protection for Out-of-step Detection and Fault Detection during Power Swings", 16th International Middle East Power Systems Conference, MEPCON 2014, 2014. Abstract

To ensure high reliability of the power system, distance relays are blocked during power swings. However, if a fault occurs during a power swing, it should be detected and the unblocking function should be invoked to clear the fault as soon as possible. Distinguishing stable and unstable power swing is one of the challenging tasks for distance relays. This paper proposes a combined scheme for detectingfaults occurrence during power swings and accurate determination of power swing stability status. The proposed scheme utilizes a differential power-based technique and a negative sequence current based technique for detecting faults occurrence during power swings. Moreover a wavelet based power angle criteria based algorithm is applied for distinguishing stable and unstable power swings. The proposed scheme is extensively tested for symmetrical and unsymmetrical faults during slow and fast power swings for simulated tested power systems using ATP software.

Shafei, M. A. R., M. A. Tawfik, and D. K. Ibrahim, "Improving Energy Efficiency in Egyptian Airports: A Case Study of Sharm-Elshiekh Airport", 21st International Middle East Power Systems Conference, MEPCON, Tanta University, Egypt, December 17-19, 2019. Abstract

Airports can play a major role in reducing the burden on the national electric grid as they have several factors that make them optimum models for applying energy efficiency strategies. Accordingly, this paper presents a Dual-Dimension Strategy (DDS) to improve the energy efficiency in the airports. This strategy aims to study the opportunities of improving energy efficiency in a way that do not affect the comfort level of occupants, as well as studying the challenges of implementing PV power stations at or around the airports without affecting the safety of aviation. In this context, a case study was conducted at Sharm-Elshiekh airport as a high occupancy level airport to discuss the opportunities and challenges accompanied by the proposed strategy. The detailed simulation of the proposed strategy was carried out using the “DesignBuilder” software, which is automatically conducted with the “EnergyPlus” simulator. Results showed that airports have an opportunity to reduce its energy consumption by up to 25% monthly by using smart control systems such proposed fuzzy system. In addition, the implementation of PV stations in or round the airports can contribute in feeding the airports with a huge amount of clean energy according to the available space and the irradiation in the site of the airport. All of these results refer to save millions of carbon emissions which resulted from depending on fuel sources.

Zeinhom, A. N., D. K. Ibrahim, and M. Gilany, "Integrated Fault Zone Discrimination and Fault Location Algorithm for Series FACTS-based Transmission Lines", 2018 Saudi Arabia Smart Grid (SASG), Jeddah, Saudi Arabia, 11-13 Dec. 2018. Abstract

Discrimination and location of faults in Flexible Alternating Current Transmission Systems (FACTS) have several challenges in power systems. This is because of the errors in the measured impedance due to FACTS control actions. The presence of series FACTS in a transmission line complicates both the fault location and discrimination between faults behind and in front of the FACTS device. This paper proposes an integrated solution for both fault zone discrimination (either in front of or behind the FACTS device) and fault location for series FACTS-compensated transmission lines. Online calculations are carried out to estimate the percentage of compensation. After fault inception, a wavelet-based algorithm is used to decide whether the fault is in front of the FACTS device or behind it. Then, a conventional distance protection algorithm is used to estimate the fault zone. After that, synchronized data signals from both ends are used to locate the exact location offline. The algorithm is tested using a real data for a 380 kV, 400 km series-compensated line in Saudi Arabia using MATLAB/SIMULINK. Different types of faults are applied to validate the effectiveness of the algorithm. Metal-Oxide Varistor (MOV) nonlinearity is also considered. Simulation results show the effectiveness of the algorithm.

Khalil, E. A., M. H. Alham, T. A. Boghdady, and D. K. Ibrahim, "Novel Single Loop Load Frequency Controller for Isolated Microgrid Via Geometric Mean Optimization", , 224th International Middle East Power System Conference (MEPCON), Egypt, 19-21 Dec. 2023. Abstract

In rapidly expanding isolated microgrids (IMGs), load frequency control (LFC) should ensure optimal power
quality for end users. In particular, renewable energy sources (RES) require robust and intelligently designed LFC systems for their stochastic nature. This study presents a novel single-loop
controller that combines a fractional order-proportional beside a tilt integral derivative with fractional order (FPTID) to improve the LFC of multi-source IMGs. Diesel generators, fuel cells, battery storage devices, and RES (solar and wind power generation) are included in the evaluated IMG. Recent geometric mean optimization adjusts FPTID controller parameters. Extensive MATLAB/Simulink simulations reveal that the FPTID controller outperforms numerous previously published controllers regarding the minimum error criteria, undershoots/overshoots/settling times, and frequency deviation in response to load and RES variations.

Ibrahim, I. M., D. K. Ibrahim, and E. E. D. A. El Zahab, "A Proposed Busbar Protection Scheme Immune to the Impact of Outflow Current during Internal Faults", International Middle-East Power Systems Conference (MEPCON), Helwan University, Egypt, December 27-29, 2016. Abstract

This paper describes a proposed busbar protection scheme immune to the impact of the outflow current during internal faults based on the combination of magnitude and phase angle comparisons. The effective relay performance is achieved by implementing the phaselet approach and the adaptive digital mimic filter. The performance of the proposed scheme is extensively analyzed for different fault conditions on a breaker and a half bus substation to ensure its proper response during internal, external and evolving faults. Tests are carried out to investigate the impact of the circulating current, CT saturation, fault inception angle and high fault resistance. ATP simulations ensure that the proposed scheme can fulfill all busbar protection requirements within quarter cycle operation time and is not affected by the outflow current during internal faults.

Mohamed Sharaf, H., H. H. Zeineldin, D. K. Ibrahim, A. El Zahab, and E. El Din, "Protection coordination of directional overcurrent relays considering fault current direction", Innovative Smart Grid Technologies Conference Europe (ISGT-Europe), 2014 IEEE PES: IEEE, pp. 1–5, 2014. Abstract

Directional inverse time overcurrent relays are used in protection systems of meshed networks to operate for fault currents in its forward zone of operation. They are used for primary and backup protection and their operation needs to be coordinated to assure selectivity. Different optimization techniques have been used to select their settings to achieve protection coordination, however the optimal protection coordination problem formulation doesn’t consider the fault current direction to assure correct operation especially for
backup relays. This paper proposes the addition of fault current direction constraint to the formulation of the optimal directional inverse overcurrent relays coordination. The proposed formulation is tested on the distribution portion of the IEEE 30 bus system considering the effect of distributed generation addition. Results show that the proposed formulation gives more accurate optimal relay settings and thus highlighting the importance of inclusion of the proposed direction constraint in the protection coordination problem.

Radwan, M. M., R. S. Sharaf, and D. K. Ibrahim, "Providing Quality Mass Higher Education, the Egyptian Experience", IMHE General Conference: Attaining and Sustaining Mass Higher Education , Paris, France, 17- 19 Sep. 2012. Abstract

Over the last few decades, like many other countries around the world, Egypt is facing the challenge of the need to expand higher education enrolment, both for meeting the growing demand and also the realization of the importance of higher education in nation economic development. Since year 2000, Egypt worked on improving higher education through developing and implementing a comprehensive strategic plan adopting the principles of equity, quality and relevance, and responding to the current and future needs of social development, job market and production as one of the main goals. The establishment of the National Authority for Quality Assurance and Accreditation in Education (NAQAAE) in 2006 as an independent authority did set national quality standards to be met by higher education institutions for accreditation. The Program of Continuous Improvement and Qualifying for Accreditation (PCIQA) was initiated in 2007 by the Ministry of Higher Education for financing, through a competitive mechanism, and technically supporting higher education institutions to implement their strategic plans, fulfil accreditation quality criteria and assure continuous improvement. This paper reviews the Egyptian experience in providing mass higher education and assuring its quality, highlighting the innovative approaches adopted both on the national strategic policies and the individual institutions practice levels.

Khalifa, A. E., D. K. Ibrahim, H. A. Al-Shatoury, I. G. Shaaban, A. M. EL-Gizawy, H. A. A. Eltalawy, T. F. Youssef, and M. R. G. M. A. Abdellah, "Quality Assurance Processes in Egyptian Higher Education Institutions at Both Institutional and National level: Their Development and Sustainability", The International Network for Quality Assurance Agencies in Higher Education (INQAAHE) Conference 2011, Madrid, Spain, 2011. Abstract

Internal and external measures assuring quality in Egyptian higher education institutions and the improvement in higher education as a result are discussed in this study. Effect of QA processes on internal mechanisms and the role of such QA processes in policy making at both the institutional and national levels are also investigated with reference to some case studies. Internal mechanisms are implemented through QA units in colleges/institutes, QA centers in universities, and projects for QA and qualifying for accreditation financed by the "Ministry of Higher Education". These projects are managed by a "Steering Committee for The Program of Continuous Improvement and Qualifying for Accreditation". The need for continuous improvement urged faculties to adopt certain policies to deal with points of weakness where some faculties intended to have a formal system to deal with student complaints, to handle resistance to change among faculty staff and administrative personnel, and to think of strategies for dealing with the bureaucracy. The needs of higher education systems in Egypt for external and internal QA measures are evident and therefore, several proposals for ensuring sustainability are suggested. "The National Authority for QA and Accreditation of Education" plays a pivotal role in external evaluation of QA activities in higher education institutions. Its basic principles are inspired from the good systems and practices aimed to assure quality of education. Cooperation of Egyptian higher education institutions with QA agencies are also discussed in this paper while referring to means of identification and dissemination of good practice for the purpose of continuous improvement.

Shafei, M. A. R., Y. A. Anwar, and D. K. Ibrahim, "Sharm El-Sheikh 5 MW PV Plant Performance, Environmental Impact and Grid Connection Parameters", 21st International Middle East Power Systems Conference, MEPCON , Tanta University, Egypt, December 17-19, 2019. Abstract

A few years ago, most of photovoltaics (PV) were installed in rather small stand-alone systems, the majority of today´s modules are implemented in grid-connected systems satisfying well-defined technical aspects. This growth is mostly due to the ambitious subsidy programs adopted by governments in the developing countries. Meanwhile, to be successfully integrated with the utility grid in low, medium, or high voltage networks, it is essential to meet the requirements of the country interconnection code. In this paper, the requirements of the Egyptian grid code for connecting a 5 MW PV plant with utility grid have been examined and evaluated. In addition, the environmental effects of installing the PV plant have been discussed and compared with fossil fuels.

Mahmoud, M. A. E. F., D. K. Ibrahim, and M. Gilany, "A Single-End Fault Location for Multi-Tapped Overhead Distribution Systems", International Middle-East Power Systems Conference (MEPCON), Helwan University, Egypt,, December 27-29, 2016. Abstract

This paper presents an automated fault location scheme for MV overhead distribution networks. The scheme utilizes only the measurements of voltage signals at the main substation. Clarke and Fast Fourier transformations are applied to get the frequency of the travelling wave generated during the
fault. A simple automation system is implemented to identify the faulted lateral. A typical 22 kV distribution system is used to test and validate the proposed scheme. ATP program is used to simulate the tested network while the required calculations are performed by MATLAB developed algorithms. Extensive fault cases are carried out at different fault positions, inception angles, fault resistance and load levels. The calculated errors indicate that the proposed scheme has low sensitivity to the change of the fault conditions that ensures the effectiveness and robustness of the proposed scheme.

fatma elzahraa magdy, D. K. Ibrahim, and W. Sabry, "Virtual Power Plants Modeling and Simulation using Innovative Electro-Economical Concept", 16th International Conference on Electrical Machines, Drives and Power Systems ELMA , Varna, Bulgaria, 6-8 June 2019. Abstract

Most of the previous researches which intended with the subject of virtual power plants (VPPs), focused on the study of VPPs from economical point of view: auctions, bidding, trading, markets, pricing, cost, profit, benefits, risk, investors … etc. Merely conjecture, all the VPPs' models presented are financial and economical models, with no one prescribed electrical model. In this paper, a generic VPP will be proposed and considered for the study. The proposed generic VPP will be modeled with a novel Electro-Economical Model (EEM). The proposed model was constructed on three steps: construction of electrical model, construction of economical model, and combining both electrical and economical models to form EEM of the proposed generic VPP. The proposed generic VPP consisting of four basic components: dispatchable power plant(s), flexible load(s), storage unit(s), and stochastic generating unit(s); was illustrated. This system model has been simulated. All simulation results will be demonstrated and discussed.

fatma elzahraa magdy, D. K. Ibrahim, and W. Sabry, "Virtual power plants novel electro-economical modeling approach", Cigre Egypt 2019, The Future of Electricity Grids: Challenges and Opportunities, Egypt, 6-8 March 2019. Abstract

From about fifteen years passed, a new term was proposed for the first time by Dielmann and Velden: "Virtual Power Plant (VPP)", and they asked about if the VPPs can contribute as a reliable and environmentally oriented energy supply, or not?, at this moment, they considered some problems that must be examined to insure the success of this idea; like: management of such a system (optimal utilization), adaptation of VPP with the network connected to (reliability), markets (retail and wholesale) … etc. If these problems are solved, then the VPP has a large opportunity to deliver an important contribution as an economic, reliable and nonpolluting energy supply system. The market is the dominant factor for the success of VPPs being. Before the age of distributed generation (DG), the energy delivery pricing model was the cost against service. The model states that consume (buy) energy then pay -buy and pay-. When the age of renewables raised up, the model of buy and pay is shifted away to a new market based pricing model: pay at first and then buy. Another conceptual model starts to appear including active demand side participation using the transactive energy concept. In this paper, a new combined model for market and electrical performance of VPPs is presented; the electro-economical model (EEM). The model will include the four basic components of any VPP: dispatchable power plants, flexible loads, storage units, and stochastic generating units. Two main targets for the proposed modeling: optimal operation of VPPs, and active network energy management of VPPs. The VPP can earn profit from the market and as a result, its objective reduces to maximizing its profit (ρ). Energy management in a VPP or active network management means the optimal operation of this VPP in order to manage energy flow. Optimal operation is based on a stochastic basis of energy sources and multi-market framework.

Conference Proceedings
Nasr, A., D. K. Ibrahim, and M. Gilany, "Accurate Fault Location Algorithm for Series-Compensated Transmission Lines Using Synchrophasor Measurements", 17th International Middle East Power Systems Conference, MEPCON 2015; Mansoura University, Egypt, December, 15-17, 2015., 2015. Abstract

Reliable and accurate fault location algorithms for series-compensated transmission lines are challenges that arise in most of modern electrical power transmission grids. This paper proposes an accurate fault location algorithm for series-compensated transmission lines. Distributed parameters long transmission line model is used in this study to account for practical travelling waves’ effect during fault incidence. The proposed algorithm uses wavelet transform for only one cycle data window length of post-fault voltage signals to detect the faulted line, then Fast Fourier Transform for voltages and currents signals of three post-fault cycles (including the 1st cycle) to locate the fault. Only positive sequence network is used for the fault location calculations, hence, the algorithm does not depend on the zero sequence parameters (i.e., ground resistivity) which are depending on moisture, temperature, etc. Different types of grounded and ungrounded faults, fault locations, fault resistances, fault inception angles are applied to validate the robustness of the algorithm. The algorithm is tested using a real case study for a 380 kV, 400 km series compensated transmission line in Saudi Arabia using MATLAB and SIMULINK software. Extensive Simulation results show the effectiveness and robustness of the proposed algorithm under various fault conditions.

Gilany, M., E. S. T. El Din, M. M. Abdel Aziz, and D. K. Ibrahim, "An accurate scheme for fault location in combined overhead line with underground power cable", Power Engineering Society General Meeting, 2005. IEEE: IEEE, pp. 2521-2527, 2005. Abstract

This paper presents an accurate fault location scheme for transmission systems consisting of an overhead line in combination with an underground power cable. The algorithm requires phasor measurements data from one end of the transmission line and the synchronized measurements at the most far end of the power cable. Fault location is derived using distributed line model, modal transformation theory and Discrete
Fourier Transform. The technique can be used on-line or off-line using the data stored in the digital transient recording apparatus. The proposed scheme has the ability to locate the fault whether it is in the overhead line or in the underground power cable. Extensive simulation studies carried out using MATLAB show that the proposed scheme provides a high accuracy in fault location under various system and fault conditions.

Metwally, M. A., A. Aboshosha, D. K. Ibrahim, and E. E. L. - D. A. EL-Zahab, "Applying Neurofuzzy Computing for Safety Improvement of Nuclear Power Reactor", 14th International Middle East Power Systems Conference (MEPCON’10), Cairo University, Egypt, 2010. Abstract

Nuclear Power Reactors (NPRs) are large in scale and complex, so the information from local fields is excessive, and therefore plant operators cannot properly process it. When a plant malfunction occurs, a great data influx is occurred, so the cause of the malfunction cannot be easily or promptly identified.
A typical NPR may have around 2,000 alarms in the Main Control Room (MCR) in addition to the display of analog data. During plant transients, hundreds of alarms may be activated in a short time. Hence, to increase the plant safety, this paper proposes a support system based on neurofuzzy that assists alarming and diagnosis systems. Throughout this framework the neurofuzzy fault diagnosis system is employed to fault diagnosis of nuclear reactors. To overcome weak points of both linguistic and neuro learning based approaches, integration between the neural networks and fuzzy logic has been applied by which the
integrated system will inherit the strengths of both approaches.

Ibrahim, D. K., M. M. Abd-elaziz, and M. B. Youwakim, "Comparison of Maximum Power Point Tracking Techniques for Different Types of Photovoltaic Models", Proceedings of the 7th International Conference on Electrical Engineering, (ICEENG) Conference, 25-27 May, Cairo, Egypt, 2010, 2010. Abstract