Faisal A. Mohamed

• Doctor of Engineering
• DG at Libyan Authority for Scientific Research

PV systems could be connected to the transmission or distribution systems. Connecting the PV system to the low distribution grid brings technical and environmental benefits to the conventional distribution network, for example, enhancing reliability, line loss minimization, voltage levels enhancement, equipment's thermal capacity improvement, and n...

In this paper, a model for the master-slave DC Microgrid over a fiber optic link is proposed. The delay margin is calculated according to Lyapunov-Krasovskii functional using the LMI toolbox in Matlab with the binary iteration algorithm. The optical fiber link is implemented using optisystem simulator. The optical fiber link is set to transmit the...

This paper presents a study on how to control voltage and current in three-phase inverter systems, where a MATLAB/SIMULINK is used as simulation analysis tool. The proportional integral (PI) controllers are applied to achieve voltage and current control. To adjust the parameters of these controllers and obtain stable voltage and current, a Multi-Ob...

The burgeoning energy demands induced by modern civilization necessitate the procurement of additional electrical energy reserves to effectively address this escalating challenge. However, the installation of new power generation units necessitates building/upgrade of accompanying transmission infrastructure, a task fraught with complexities. To au...

The high penetration of distribution generators (DGs), such as photovoltaic (PV), has made optimal overcurrent coordination a major concern for power protection. In the literature, the conventional single or multi‐objective function (OF) for phase overcurrent relays (OCRs) scheme faces challenges in terms of stability, sensitivity, and selectivity...

In this paper, the design and stability of three-phase inverter is tested experimentally and evaluated using simulation. The voltage control loop is implemented in the dq reference frame which contains two proportional- integral (PI) controller. The PI controller is used to regulate the voltage of the three-phase inverter. Arduino is used to implem...

As the cost of photovoltaic (PV) systems has sharply fallen over the recent years, they have been enormously installed, whether in open racks, rooftop or even floating on water. Today, the integration of PV systems into the power system is mostly seen on the low voltage distribution network. This adoption is envisaged to bring both technical and en...

The interconnection between diverse Distribution Generations (DGs) that utilize various technologies and complex structure of networks are the most characteristic of modern Distribution Networks (DN). The wide adoption of DGs considerably affects the power flow dynamics in the DN and consequently the fault characteristics. The excessive level of fa...

The interconnection between diverse Distribution Generations (DGs) that utilize various technologies and complex structure of networks are the most characteristic of modern Distribution Networks (DN). The wide adoption of DGs considerably affects the power flow dynamics in the DN and consequently the fault characteristics. The excessive level of fa...

ABSTRACT Abstract- In this paper, an experimental study to the most effected parameters on the PV module performance enhancement were evaluated. A duct with different DC fans configurations were used in order to dissipate waste heat from the back side of PV panel. The experimental study was located at the Center of Engineering Consultancy and Ener...

One of the several features characterizing smart grids is the different technologies of the connected Distributed Generation (DG) and the multi looped structure of Distributed Network (DN). The continual increase in the share of DG significantly influences the topology and dynamics of DNs and fault current levels. The high level of fault currents m...

Although Libya has a massive potential of renewable energy (RE) resources particularly solar energy, the country suffers from a shortage of electrical energy and experiences frequent blackouts. The dominant preventive action taken by the grid operator is to shed loads. The main two reasons for the limited RE projects are the highly subsidized elect...

Although Libya has a massive potential of renewable energy (RE) resources particularly solar energy, the country suffers from a shortage of electrical energy and experiences frequent blackouts. The dominant preventive action taken by the grid operator is to shed loads. The main two reasons for the limited RE projects are the highly subsidized elect...

The design and performance of a commercial hybrid solar gas turbine are investigated in this paper. To provide a complete study, an in-house Matlab code is used to estimate the geometric design parameters of the solar receiver and the tower. SolarPILOT software is used to layout and estimate the performance of the heliostat field. TRNSYS software i...

This study presents a thermal performance simulation of solar central heat generation system for multipurpose applications. A theoretical model is developed using TRNSYS software and an experimental test rig is planning to be installed at the Center for Solar Energy Research and Studies in Tajoura, Libya. The system consists 80 evacuated tubes coll...

This paper discusses the integration of wind energy system in Derna, Libya to the main grid of General Electricity company of Libya (GECOL) through a back-to-back converter. The machine side converter is used to regulate the AC and DC voltages while the grid side converter is used to control the active and reactive power supplied by the wind energy...

Due to the low environmental impact, smaller storage units, low wind speed, low power system distribution network impact, and low maintenance, small wind turbines have gained more attention. However, the usage of small turbines usually faces several shortcomings, and the actual yield is often lower than expected, generally because the output power...

The majority of generated electricity in Libya is produced from oil and gas, both of which are considered the primary revenue sources of the Libyan economy. As it is anticipated that the energy demand will rise sharply in the near future, more of the oil and gas reserves will be consumed and hence increasing CO 2 emissions. The focus of this paper...

Wind Turbines used in residential applications typically range from a few KW to 10 KW. Small-scale wind turbines are more suitable for remote off-grid locations. A 0.5-1KWp, Hummer wind turbine has been installed in Noagea-Benghazi since 2010 for educational proposes, field studies, training and graduate projects. The wind turbine performance tests...

The Libyan economy is dominated by the oil and the gas which are considered as the primary energy sources for the generating power plants. Recently, the demand on the energy has grown significantly in Libya. This growth leads in more oil and gas consumption and more CO2 emissions. For these reasons, Libya should create an urgent strategy to use its...

The Libyan economy is dominated by the oil and the gas which are considered as the primary energy sources for the generating power plants. Recently, the demand on the energy has grown significantly in Libya. This growth leads in more oil and gas consumption and more CO2 emissions. For these reasons, Libya should create an urgent strategy to use its...

Over the last few decades, the inverse over-current protection scheme has been one of the most common schemes utilized in protecting the Distribution Networks (DN). Although over-current relays (OCR) give excellent protection in extreme failure situations, but continuous integration of Distributed Generation (DG) and the multi-looped structure of m...

In the microgrid, significant and frequent change in the short current level due to the transition in the operating pattern from the grid-connected mode to the islanded mode. Besides the continual connection and detaching of Distributed Generation (DG) from the network. Consequently, the overcurrent scheme will be affected by this observed change i...

The environmental and economic features of renewable energy sources have made it possible to be integrated as Distributed Generation (DG) units in distribution networks and to be widely utilized in modern distribution systems. The intermittent nature of renewable energy sources, altering operational conditions, and the complex topology of active di...

Wind energy (WE) has become one of the most promising and developed forms of renewable energy source due to its efficiency and the availability of different capacities according to the loading requirements. The integration of wind turbines in the Libyan network has become an indispensable choice due to Libya’s distinguished location and for the Lib...

The optimal coordination of primary and backup over-current relays (OCRs) scheme has become one of the main challenges in modern MV-distribution networks (DN) owing to the multi-looped structure and the increased penetration of interment nature-DGs with large-share capacities. The changeable operational topologies of microgrids in modern DN have in...

Typically, it is desired to operate the wind turbine at the maximum power point. However, in small wind turbines which have a storage system integrated with them, harvesting as much energy as possible is more crucial. This may be achieved by reducing the cut-in speed while maximizing the mechanical power. These two goals may be achieved by optimizi...

In order to meet the continuous growth in the global energy demand and to reduce the negative environment impacts which is associated with the global warming, adopting renewable energy sources by policy makers need to be considered. Although Libya is very rich in solar energy resource, the country has been recently struggling to satisfy its energy...

The increasing growth of renewable energy sources in the network will impact the stability and the reliability of the network. Smart meters is one of the most important primary component in the future network. In the event of an emergency , the demand will play vital role in the stability of the power system. Traditionally, when a sudden generation...

In order to provide the reactive power demand of a self-excited induction generator which is required to achieve a voltage build-up, a three-phase capacitor bank is connected between the generator terminals. As loading increases, the operating point on the magnetizing curve moves toward the linear region which may lead to the collapse of the genera...

Though integration of wind distributed generation directly into the distribution level has considerable advantages, increased penetration of Wind Distributed Generation (RDG) alter the network configuration and jeopardize the protection system operation and system stability, for this reason, necessitate change in power system protection philosophy...

Integration of renewable energy sources directly into the distribution network become a common practice nowadays, the contribution of renewable energy sources to the distribution network predominate by weather conditions which change short circuit level capability for the electric network. This change in the network configuration could influence th...

Many studies indicate the importance of distributed generation (DG) as one of the best alternatives to conventional energy sources. The growth in population is causing a significant increase in electricity demand all over the world, which creating a considerable need for further investment in the electric network infrastructure. However, integratio...

The aim of this paper is to propose a methodology of modeling and simulation of electrical vehicles (EV) for design and control of their power train. On the base of this method, new software tool which is called ELEctric VEhicle Simulator (ELEVES) has been developed in Delphi environment with a Pascal code. It provides the vehicle engineering commu...

Recently, there was a demand to find unconventional solutions for energy. Therefore, the investigations concerned to discover alternative fuel such as compressed natural gas, methanol, biodiesel, etc. In this study, a new alternative fuel in vehicle engines is evaluated and, the reduction of the emitted pollution as a result of using this fuel. In...

In recent years, wind turbines have become an acceptable alternative for electrical energy generation by fossil or nuclear power plants, because of the environmental and economic benefits. Wind energy conversion systems are becoming a reliable competitor of classical power generation systems, which are facing to constantly changing operating parame...

This chapter discusses online management of the MicroGrid components. A major challenge for all power utilities is not only to satisfy the consumer demand for power, but to do so at minimal cost and low emissions. Any given power system can be comprised of multiple generating units each of which has its own characteristic operating parameters. The...

This paper proposes a generalized formulation to determine the optimal operating strategy and cost optimization scheme for a MicroGrid (MG) for residential application. Genetic Algorithm is applied to the environmental/economic problem of the MG. The proposed problem is formulated as a nonlinear constrained MO optimization problem. Prior to the opt...

This paper presents a generalized formulation for determining the optimal operating strategy and cost optimization scheme and reduction of emissions of a MicroGrid (MG). Multiobjective (MO) optimization is applied to the environmental economic problem of the MG. The proposed problem is formulated as a nonlinear constrained MO optimization problem....

This paper presents a generalized formulation for determining the optimal operating strategy and cost optimization scheme as well as reducing the emissions of a microgrid (MG). Multiobjective (MO) optimization based on modified game theory is applied to the environmental economic problem of the MG. The proposed problem is formulated as a nonlinear...

This paper proposes a new method to manage the daily operation of MicroGrid (MG) for residential applications. Thorough discussion and simulations are conducted to clarify and highlight the principle of the method. Nonlinear optimization problem formulation is also performed. The proposed cost function takes into consideration the costs of the emis...

The electric propulsion is considered as a promising technology because it allows proposing a solution technically feasible and economically viable. This technology appears in three main groups of Electric Vehicles (EV): Battery Electric Vehicles (BEV), Fuel Cell Electric Vehicles (FCEV) and Hybrid Electric Vehicles (HEV). These types of vehicles r...

This paper presents a generalized formulation to determine the optimal operating strategy and cost optimization scheme for a MicroGrid. Prior to the optimization of the MicroGrid itself, models for the system components are determined using real data. The proposed cost function takes into consideration the costs of the emissions, NOx, SO2, and CO2,...

This paper proposes a generalized formulation to determine the optimal operating strategy and cost optimization scheme as well as the reduction of the emissions for a MicroGrid (MG). Multiobjective (MO) optimization is applied to the environmental/economic problem of the MG. The proposed problem is formulated as a nonlinear constrained MO optimizat...

This paper proposes a generalized formulation to determine the optimal operating strategy and cost optimization scheme as well as the reduction of the emissions for a MicroGrid (MG). Multiobjective (MO) optimization is applied to the environmental/economic problem of the MG. The proposed problem is formulated as a nonlinear constrained MO optimizat...

In this paper a generalized formulation for determining the optimal operating strategy and cost optimization scheme as well as reducing the emissions of a Microgrid (MG) is presented. Multiobjective (MO) optimization is applied to the environmental economic problem of the MG. The MG considered in this paper consists of a wind turbine, a micro turbi...

Modern power network owners have to respond to a number of challenges such as significant load changes and growth in the geographical distribution of the customers. On the other hand, the environmental policy and economic requirements from the market are constantly growing. The presence of these problems has led to an increased interest in the loca...

This paper presents a generalized formulation to determine the optimal operating strategy and cost optimization scheme as well as the reduction of the emissions for a MicroGrid (MG). Multiobjective (MO) optimization is applied to the environmental/economic problem of the MG. The proposed problem is formulated as a nonlinear constrained MO optimizat...

This paper presents a generalized formulation to determine the optimal operating strategy and cost optimization scheme as well as the reduction of the emissions for a MicroGrid (MG). Multiobjective (MO) optimization is applied to the environmental/economic problem of the MG. The proposed problem is formulated as a nonlinear constrainted MO optimiza...

This paper presents a generalized formulation for determining the optimal operating strategy and cost optimization scheme as well as reducing the emissions of a MicroGrid (MG). Multiobjective (MO) optimization is applied to the environmental economic problem of the MG. The proposed problem is formulated as a nonlinear constrained MO optimization pr...

This paper presents a generalized formulation to determine the optimal operating strategy and cost optimization scheme for a MicroGrid. Prior to the optimization of the microgrid itself, the system model components from some real manufactural data are constructed. The proposed cost function takes into consideration the costs of the emissions NOx, S...

Speed control of power generation plants driven by diesel prime-movers is difficult because of the presence of a dead time and changes in parameters. This results in slow plant dynamics. In this paper, genetic algorithm self tuning PID controller based on indirect estimation of the dead time is proposed resulting in fast response at the startup and...

This paper is concerned with the black box modelling of induction motor from test data. Data is obtained using a computer-based data acquisition card, the aim of the work described in this paper is to obtain model of the induction motor directly from test data. A pseudo random binary sequence (PRBS) was chosen as the test input signal. Data once co...

The self-tuning speed control of induction motor drives is presented using proportional plus integral (PI) method combined with the recursive least squares parameter estimation method to regulate the motor speed and load variation. To obtain good tracking and control characteristics, a PI self-tuning controller is adopted and the design procedure i...

This paper is concerned with the black-box modelling of the induction motor from test data. Data obtained using a computer-based data acquisition card, the aim of the work described in this paper is to obtain linear model of the induction motor directly from test data. A pseudo random binary sequence (PRBS) was chosen as the test input signal. Data...

In this paper, a self-tuning speed control of induction motor drives is presented using pole placement method combined with recursive least squares parameter estimation method to regulate the induction motor speed under load variation. To obtain good tracking and control characteristics, a pole placement self-tuning controller is adopted and design...

The implicit or direct GMV regulator combined with the recursive least squares parameter estimation method was applied to regulate the speed of the induction motor under the influence of load variations. To obtain good tracking and control characteristics, a GMV self-tuning regulator is adopted and a design procedure is developed. The performance o...