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Abo-Hamad, G. M., D. K. Ibrahim, E. A. M. Zahab, and A. F. Zobaa, "Adaptive Mho Distance Protection for Interconnected Transmission Lines Compensated with Thyristor Controlled Series Capacitor", Energies , vol. 14, issue 9, pp. Article 2477, 2021. Abstract

This paper proposes an adaptive dynamic Mho distance relay based on a phase comparator scheme for protecting interconnected transmission networks compensated with a Thyristor Controlled Series Capacitor (TCSC). The proposed relay uses an impedance index factor to initiate the fault detection subroutine. The RMS of the positive sequence current of the faulted loop and the TCSC terminal current are compared for TCSC zone identification. A phase comparator for ground and phase distance elements is proposed, relying on the positive sequence voltage as a polarized memory quantity, while the operating and polarizing quantities are developed using estimated TCSC impedance to mitigate its negative impact. The proposed scheme is easy in implementation and independent on synchronized data transfer, as minimum communication requirements are needed. To evaluate the performance of the proposed scheme, extensive simulation studies were carried out on an IEEE9 bus system compensated with TCSC for different firing angles covering four modes of TCSC operations, different fault types, and fault locations. In addition, an IEEE-39 bus network, as a large interconnected system, is tested for validation purposes. The achieved results designate the precision of the proposed scheme. Moreover, the results indicate its effectiveness for fault resistance tolerance, close-in three phase faults, and stable power swing phenomenon compared with conventional relays.

Abo-Hamad, G. M., D. K. Ibrahim, E. A. M. Zahab, and A. F. Zobaa, "Dynamic Quadrilateral Characteristic-Based Distance Relays for Transmission Lines Equipped with TCSC", Energies , vol. 14, issue 21, pp. Article 7074, 2021. Abstract

A two-fold adaptive dynamic quadrilateral relay is developed in this research for protecting Thyristor-Controlled Series Compensator (TCSC)-compensated transmission lines (TLs). By investigating a new tilt angle and modifying the Takagi method to recognize the fault zone identifier, the proposed relay adapts its reactive reach and resistive reach separately and independently. The investigated tilt angle and identified fault zone use the TCSC reactance to compensate its effect on the TL parameters and system homogeneity. Excessive tests are simulated by MATLAB on the non-homogenous network, IEEE-9 bus system and further tests are carried out on IEEE-39 bus system in order to generalize and validate the efficiency of the proposed approach. The designed trip boundaries are able to detect wide range of resistive faults under all TCSC modes of operations. The proposed approach is easy to implement as there no need for data synchronization or a high level of computation and filtration. Moreover, the proposed adaptive dynamic relay can be applied for non-homogeneity systems and short as well as long TLs which are either TCSC-compensated or -uncompensated TLs.

Aboul-Zahab, E. M., D. K. Ibrahim, and S. M. Saleh, "High impedance fault detection in mutually coupled double-ended transmission lines using high frequency disturbances", 12th international Middle-East Power System Conference (MEPCON‘2008), Aswan, Egypt,, IEEE, pp. 412 - 419, 2008. Abstract

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Al-Barashi, M. M., D. K. Ibrahim, and E. E. - D. A. El-Zahab, "Evaluating The Energy System in Yemen", Journal of Electric Engineering, JEE, vol. 16, issue 1, pp. Article - 16, 2016. Abstract

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Al-Barashi, M. M., D. K. Ibrahim, and E. E. - D. A. El-Zahab, "Evaluating Connecting Al-Mukha New Wind Farm to Yemen Power System", International Journal of Electrical Energy, vol. 3, issue 2, pp. 57 - 67, 2015. Abstract

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Alham, M. H., M. Elshahed, D. K. Ibrahim, and E. E. D. A. El Zahab, "A dynamic economic emission dispatch considering wind power uncertainty incorporating energy storage system and demand side management", Renewable Energy, vol. 96: Pergamon, pp. 800 - 811, 2016. Abstract

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Alham, M. H., M. Elshahed, D. K. Ibrahim, and E. E. D. A. El Zahab, "Optimal operation of power system incorporating wind energy with demand side management", Ain Shams Engineering Journal, vol. 8, issue 1: Elsevier, pp. 1 - 7, 2017. Abstract

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Din, E. S. T. E., D. K. Ibrahim, E. Aboul-Zahab, and S. M. Saleh, "High impedance fault detection in EHV series compensated lines using the wavelet transform", IEEE PES Power Systems Conference & Exposition , Washington, U.S.A, IEEE, pp. 1 - 10, 2009. Abstract

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Hamdy, M., M. Elshahed, D. Khali, and E. E. - D. A. El-Zahab, "Stochastic Unit Commitment Incorporating Demand Side Management and Optimal Storage Capacity", Iranian Journal of Science and Technology, Transactions of Electrical Engineering, vol. 43, issue 1, pp. S559–S571, 2019. Abstract

High penetration of wind energy imposes several operational challenges due to its uncertainty and intermittent nature. Flexible energy resources represent key solutions to compensate for power mismatch associated with wind power (WP) uncertainty and intermittency. This paper proposes a new stochastic unit commitment (SUC) problem formulation including high penetration of wind energy, energy storage system (ESS), and demand side management. Firstly, the Latin hypercube sampling is combined with Cholesky decomposition method to generate different WP scenarios. The simulated scenarios are then reduced using the fast forward selection algorithm. Finally, a novel SUC formulation implements these reduced scenarios to size the ESS optimally, considering its cost and benefit maximization of wind energy. To validate the proposed approach, a nine-unit test system is used to demonstrate the reduction in the operational cost and the increase in the utilized wind energy under different operational conditions.

Hamza El-Sayed, K., D. K. Ibrahim, and E. E. - D. A. El-Zahab, "Operation and Control of 850kW Doubly Fed Induction Generators Based Al-Zafarana Egyptian Wind Farm", International Journal of Electrical Energy, vol. 4, issue 2, pp. 112 - 121, 2016. Abstract

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Ibrahim, D. K., A. F. Zobaa, E. A. El-Zahab, and G. M. Abo-Hamad, "Improving Mho and Quadrilateral Relays Performance during Power Swings", International Review of Electrical Engineering, IREE, vol. 5, issue 6: Praise Worthy Prize, FEDERICO II University 21 Claudio Naples I 80125 Italy, pp. 2919-2928, 2010. Abstract

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Ibrahim, D. K., M. E. Rezk, and E. E. - D. A. El-Zahab, "Improving distance protection performance at zone1 using new adaptive tripping time scheme", IEEE International Energy Conference (ENERGYCON), Croatia, IEEE, pp. 528 - 535, 2014. Abstract

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Ibrahim, D. K., E. E. D. A. El Zahab, and S. A. E. A. Mostafa, "New Coordination Approach to Minimize the Number of Re-adjusted Relays When Adding DGs in Interconnected Power Systems", Journal of Electrical Engineering & Technology (JEET), vol. 12, issue 2, pp. 502 - 512, 2017. Abstract

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Ibrahim, D. K., E. E. D. A. El Zahab, and S. A. E. A. Mostafa, "New coordination approach to minimize the number of re-adjusted relays when adding DGs in interconnected power systems with a minimum value of fault current limiter", International Journal of Electrical Power & Energy Systems, vol. 85, issue February: Elsevier, pp. 32 - 41, 2017. Abstract

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Ibrahim, D. K., E. S. T. E. Din, E. M. Aboul-Zahab, and S. M. Saleh, "Real time evaluation of DWT-based high impedance fault detection in EHV transmission", Electric Power Systems Research, vol. 80, issue 8: Elsevier, pp. 907 - 914, 2010. Abstract

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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", Proceedings of the 16th International Middle East Power Systems Conference, MEPCON, Ain Shams University, Egypt, 2014. Abstract

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Ibrahim, D. K., E. E. L. - D. A. EL-Zahab, and S. M. Saleh, "Unsynchronized fault-location scheme for nonlinear HIF in transmission lines", IEEE Transactions on Power Delivery, vol. 25, issue 2: IEEE, pp. 631 - 637, 2010. Abstract

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Ibrahim, D. K., G. M. Abo-Hamad, A. E. E. M. Zahab, and A. F. Zobaa, "Comprehensive Analysis of the Impact of the TCSC on Distance Relays in Interconnected Transmission Networks", IEEE Access, vol. 8, pp. 228315 – 228325, 2020. Abstract

This article extensively investigates the calculations of the compensation factor of the thyristor-controlled series compensator (TCSC), which are used to accurately evaluate the negative impacts of the TCSC on the performance of conventional distance relays. To broadly evaluate the distance protection
performance, the TCSC was adapted to the IEEE 9-bus system as one of the interconnected transmission networks that are increasingly spreading to improve service reliability, reduce reserve capacity, and enhance
system efficiency. In addition, IEEE 39-bus system, as a large interconnected system, is also examined to generalize the TCSC impact on different interconnected systems. To determine the precise impact,
the impedance of the TCSC was calculated based on its practical design parameters. The impedance of the TCSC was examined as a function of transmission line impedance and ring angle. Both Mho and Quadrilateral distance relays were tested using the MATLAB/Simulink environment for different types of faults, fault locations, fault resistances, and ring angles for capacitive, inductive, and blocking modes of TCSC operation. In addition, distance relay performance was evaluated during power swing phenomenon in the presence of the TCSC. Simulation tests indicated the negative impacts of the TCSC on distance relay operation, which are not limited to over-reach and under-reach in faulty conditions but also to maloperation in dynamic disturbances that cause power swing phenomena on the protected line.

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

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Ibrahim, D. K., E. M. Aboul-Zahab, and S. M. Saleh, "High-impedance fault detection in EHV transmission lines", 12th international Middle-East Power System Conference (MEPCON‘2008), Aswan, Egypt,, IEEE, pp. 192 - 199, 2008. Abstract

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Ibrahim, D. K., E. M. Aboul-Zahab, and S. M. Saleh, "High impedance faults detection in EHV transmission lines using the wavelet transforms", Proceedings of the IEEE Power Engineering Society, General Meeting, Tampa, FL , USA, IEEE, pp. 1 - 7, 2007. Abstract

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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", 2016 International Middle-East Power Systems Conference (MEPCON),, Helwan University, Egypt, IEEE, pp. 921 - 926, 2016. Abstract

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Ibrahim, D. K., A. F. Zobaa, E. Abo El-Zahab, and G. M. Abo-Hamad, "A Hybird Algorithm for Blocking Power Swings", Proceedings of the 7th International Conference on Electrical Engineering, (ICEENG) Conference, Cairo, Egypt, 2010. Abstract

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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", Proceedings of 14th International Middle East Power Systems Conference (MEPCON 2010), Cairo, Egypt, 2010. Abstract

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Mohamed, S. H., Z. H. H., D. K. Ibrahim, and A. E. L. - Z. E. EL-Din, "A Proposed Coordination Strategy for Meshed Distribution Systems with DG Considering User-defined Characteristics of Directional Inverse Time Overcurrent Relays", International Journal of Electrical Power & Energy systems, vol. 65: Elsevier, pp. 49 - 58, 2015. Abstract

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Mohamed Sharaf, H., H. H. Zeineldin, D. K. Ibrahim, and E. E. L. - D. A. EL-Zahab, "Directional Inverse Time Overcurrent Relay for Meshed Distribution Systems with Distributed Generation with Additional Continuous Relay Settings", 12th International Conference on Developments in Power System Protection, IET, Copenhagen, IET, 2014. Abstract

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Mohamed Sharaf, H., H. H. Zeineldin, D. K. Ibrahim, and E. E. D. A. El Zahab, "Protection coordination of directional overcurrent relays considering fault current direction", Proceedings of the 5th IEEE conference on Innovative Smart Grid Technologies, ISGT 2014, Istanbul, Turkey, IEEE, pp. 1 - 5, 2014. Abstract

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Mostafa, S. A. E. A., D. K. Ibrahim, and E. E. - D. A. El-Zahab, "Directional Overcurrent Relays Coordination Restoration By Reducing Minimum Fault Current Limiter Impedance", Journal of Energy and Power Engineering, vol. 8, pp. 1132 - 1141, 2014. Abstract

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Mostafa, S. A. E. A., D. K. Ibrahim, and E. E. - D. A. El-Zahab, "Directional Overcurrent Relays Coordination Restoration By Reducing Minimum Fault Current Limiter Impedance", Proceedings of the 15th International Middle East Power Systems Conference, MEPCON , Alexandria, Egypt, 2012. Abstract

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Mostafa, S. A. E. A., D. K. Ibrahim, and E. E. - D. A. El-Zahab, "Two Approaches for Directional Overcurrent Relays Coordination in Interconnected Power Systems with Distributed Generation", Proceedings of the 8th International Conference on Electrical Engineering, ICEENG Conference, Military Technical College, Cairo, Egypt, 2012. Abstract

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Omar, A. I., Z. M. Ali, S. A. H. E. Aleem, E. E. M. Abou-El-Zahab, and A. M. Sharaf, "A Dynamic Switched Compensation Scheme for Grid-Connected Wind Energy Systems Using Cuckoo Search Algorithm", International Journal on Energy Conversion (IRECON), vol. 7, issue 2, pp. 64-74, 2019. Abstract

This paper presents a novel stabilization FACTS-based scheme that acts as a switched compensator for grid-connected wind energy systems. It is a member of a family of devices and switched dynamic voltage stabilization converters that were developed to ensure minimal loss of excitation, voltage stabilization, energy efficient utilization, power quality enhancement and harmonic distortion reduction in AC distribution grid networks. A novel-dual action distributed FACTS based–switched power filter compensator (SPFC) scheme is developed for efficient utilization of wind energy under varying wind conditions and major load excursions. A dynamic multi-level error-driven decoupled time de-scaled multi regulation control strategy is used to guarantee better power quality performance in terms of voltage enhancement and stabilization of the AC buses, improvement of power factor, and harmonic distortion reduction. The proposed SPFC was controlled using an inter-coupled weighted modified proportional-integral-derivative (WM-PID) controller. Cuckoo search (CS) optimization algorithm is employed to get the PID controller gains in terms of variations and excursions in wind speed and dynamic load excursions to reflect the performance of the compensator scheme. The effectiveness of the proposed SPFC with the multi-level control strategy has been assessed by time-domain simulations in Matlab/Simulink environment. The results obtained show the robustness of the proposed topology.

Omar, A. I., S. A. H. E. Aleem, E. E. A. El-Zahab, M. Algablawy, and Z. M. Ali, "An improved approach for robust control of dynamic voltage restorer and power quality enhancement using grasshopper optimization algorithm", ISA Transactions, vol. 95, issue Dec. 2019, pp. 110-129, 2019. Abstract

This paper presents a novel contribution of a low complexity control scheme for voltage control of a dynamic voltage restorer (DVR). The scheme proposed utilizes an error-driven proportional–integral–derivative (PID) controller to guarantee better power quality performance in terms of voltage enhancement and stabilization of the buses, energy efficient utilization, and harmonic distortion reduction in a distribution network. This method maintains the load voltage close to or equal to the nominal value in terms of various voltage disturbances such as balanced and unbalanced sag/swell, voltage imbalance, notching, different fault conditions as well as power system harmonic distortion. A grasshopper optimization algorithm (GOA) is used to tune the gain values of the PID controller. In order to validate the effectiveness of the proposed DVR controller, first, a fractional order PID controller was presented and compared with the proposed one. Further, a comparative performance evaluation of four optimization techniques, namely Cuckoo search (CSA), GOA, Flower pollination (FBA), and Grey wolf optimizer (GWO), is presented to compare between the PID and FOPID performance in terms of fault conditions in order to achieve a global minimum error and fast dynamic response of the proposed controller. Second, a comparative analysis of simulation results obtained using the proposed controller and those obtained using an active disturbance rejection controller (ADRC) is presented, and it was found that the performance of the optimal PID is better than the performance of the conventional ADRC. Finally, the effectiveness of the presented DVR with the controller proposed has been assessed by time-domain simulations in the MATLAB/Simulink platform.

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Saleh, S. M., E. M. Aboul-Zahab, T. E. Eldin, D. K. Ibrahim, and M. I. Gilany, "Neural network-based technique used for recovery the CCVT primary signal", IEEE Power & Energy Society General Meeting, PES' 09, Calgary, Alberta, Canada, IEEE, pp. 1 - 7, 2009. Abstract

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Shafei, M. A. R., D. K. Ibrahim, E. E. - D. A. El-Zahab, and M. A. A. Younes, "Biogeography-based optimization technique for maximum power tracking of hydrokinetic turbines", Proceedings of the IEEE International Conference on Renewable Energy Research and Applications (ICRERA), USA, IEEE, pp. 789 - 794, 2014. Abstract

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Shafei, M. A. R., D. K. Ibrahim, and E. E. - D. A. El-Zahab, "Transient stability enhancement of Egyptian national grid including nuclear power plant in Dabaa area", IEEE International Conference on Power and Energy (PECon), Kota Kinabalu Sabah, Malaysia, IEEE, pp. 487 - 492, 2012. Abstract

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Shafei, M. A. R., D. K. Ibrahim, A. M. Ali, M. A. A. Younes, and E. E. L. - D. A. EL-Zahab, "Novel approach for hydrokinetic turbine applications", Energy for Sustainable Development, vol. 27, issue August: Elsevier, pp. 120 - 126, 2015. Abstract

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Shazly, J. H., M. A. Mostafa, D. K. Ibrahim, and E. A. E. El Zahab, "Thermal analysis of high-voltage cables with several types of insulation for different configurations in the presence of harmonics", IET Generation, Transmission & Distribution, vol. 11, issue 14: IET Digital Library, pp. 3439 - 3448, 2017. Abstract

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Shehata, T., M. A. S. moteleb, and E. M. A. El-Zahab, "STATCOM controllers based on fuzzy PI approach", Indonesian Journal of Electrical Engineering and Computer Science, vol. 18, issue 3, pp. 1138-1147, 2020. Abstract

The electricity companies enforced some legislation on the electricity consumption contracts because the electricity network cannot bear the increasing demands of consumers. Therefore, a new controlling system is required to improve the frequent variations of the power system operating point (OP). Consequently, the flexible AC transmission systems (FACTS) controllers should be able to integrate with recent OP. Coordination of FACTS controller is more sophisticated due to various OP and uncertainties parametric in cooperation with the non linearity of power system (PS). Static Synchronous Compensator (STATCOM) plays very important role like the stability support of large and small transient-disturbance in PS. Therefore, the aim of this research is presents fuzzy logic (FL) with the PI controller (a novel controller) its ability to improve the performance of the power system along with the capability of switch irregular and rough actual world data. This new controlling system may be suitable for a wide range of applications especially the models which deal with huge and complicated data analysis. This new controller system carries out the adjustments of the voltage on DC capacitor under transient and steady-state conditions.

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Younis, R. A., D. K. Ibrahim, E. M.Aboul-Zahab, and A. ’fotouh El'Gharably, "Power Management Regulation Control Integrated with Demand Side Management for Stand-alone Hybrid Microgrid Considering Battery Degradation", International Journal of Renewable Energy Research, vol. 9, issue 4, pp. 1912-1923, 2019. Abstract

A new Power Management Regulation Control (PMRC) integrated with Demand Side Management (DSM) strategies is proposed to enhance the Energy Management System (EMS) of a stand-alone hybrid microgrid. The microgrid combines Wind and PV systems as Renewable Energy Sources (RES) with a hybrid Energy Storage System (ESS) of Battery and Fuel Cell/Electrolyzer set. Towards achieving Net Zero Energy Supply, such microgrid is adequate in remote and isolated new communities with AC controllable critical and noncritical loads. The proposed PMRC implies two-levels of control based on Multi-Agent System (MAS). The first level keeps the output power of each source in its maximum available output power by applying maximum power point tracking (MPPT) techniques. The second level is based on making proper decisions for achieving the power balancing regulation and coordination between the available and the reserve power of the RES and ESS under different operating modes. Valley Filling, Energy Conservation and Load Shifting are applied as DSM strategies to improve loads sustainability during system contingencies. Considering the battery as the most expensive part in the microgrid, the effectiveness of the proposed strategy is further verified by determining the maximum permissible estimated battery lifetime during the operation in all possible scenarios. Extensive simulation studies for various scenarios of microgrid operation in a year were carried out using Matlab/ Simulink with realistic typical wind speed, solar irradiation data and restricted by the status of available ESS.

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