Omar M. Salim

Benha University · Department of Electrical Engineering (Benha)

The integration of standalone microgrids led to unconventional electrical system with new challenges raised. The new technical challenges regard power losses, stability, and power quality (PQ). This research work addressed the PQ improvement in the parallel multi-inverter operation of islanded microgrid (MG). Improvements of PQ covers voltage/frequ...

Wind forecasting has gained considerable interest due to the abundance of renewable energy and the rapid advancement of wind energy extraction technologies. Wind forecasting is the process of extracting one or more features from time series data to increase prediction accuracy. The various forecasting models for wind speed and power include physica...

Wireless sensor networks (WSNs) have garnered much attention in the last decades. Nowadays, the network contains sensors that have been expanded into a more extensive network than the internet. Cost is one of the issues of WSNs, and this cost may be in the form of bandwidth, computational cost, deployment cost, or sensors' battery (sensor life). Th...

In most of machine control and automation problems, there are two or more axes of motion which must be coordinated. Axes synchronization is a crucial task in modern machinery for contouring control. It aims to feed each axis with commands that keeps it follow its target contour. In addition, to modify these commands to keep the actual contour very...

Weather prediction is extremely important in many fields such as power generation and planning, air and marine navigation, and other fields which require accurate knowledge of the weather in a specific location. Wind speed (WS) is one of the most challenging weather variables to predict. Therefore, there are many approaches to predict WS including...

Usually the load of the underground power cable varies throughout the day hours as well as with the year seasons. Consequently, the temperatures of the cable elements and the soil in contact with the cable surface change up and down. In some field applications the cables must be installed in non-metallic protective ducts. One of the merits of the c...

Wireless sensor network (WSN) is a developed wireless network consisting of some connected sensor nodes. The WSN is employed in many fields such as military, industrial, and environmental monitoring applications. These nodes are equipped with sensors for sensing the environmental variables such as temperature, humidity, wind speed, and so on. In mo...

In this study, power quality (PQ) improvement has been addressed, in the form of total harmonic distortion (THD) minimisation, as well as, voltage regulation using two cascaded schemes. The first scheme is the optimised triple action controller (TAC)-based pulse width modulated voltage source inverter. TAC consists of a proportional resonant contro...

Networked sensors in smart grids allow techniques like sensor fusion including: sensor similarities, as well as, sensor complementarities to be integrated to obtain new information or feature that is not measured directly. On the other hand, these techniques can be extended to get trusted readings at different correlated areas based on historical o...

Harmonic distortion is a crucial power quality (PQ) issue especially in microgrids. Distributed energy resources employ either synchronous generator or voltage source inverter to interface microsource with loads. This paper presents the analysis of the proportional resonant (PR) controller along with a selective harmonic compensator (SHC) for a sta...

Good practice in smart grids is networked sensors topologies which give the ability to fuse sensors to obtain a new feature based on sensors’ complementarity. Moreover, to get a prediction based on other sensors, possibly in other areas, in case of sensor failure. This ability may be achieved by correlating sensor data based on their historical obs...

Grounding system is one of the most important items of the power plants and substation systems design. The main purpose of power system substation grounding grids is to maintain reliable operation and provide protection for personnel and equipment during fault conditions. In any substation planning, economical and effective grounding system plays a...

Renewable energy resources have a great influence on country’s future planning. However, building such investments needs reliable and accurate studies based on huge information and historical data, that might be considered a great challenge. Thus, generating some form of artificial or what they call it "synthetic" patterns that give the same hidden...

Grounding system (GS) represents one of the most essential items of the power plants and substation systems design. The main objective of power system substation grounding grids is to maintain reliable operation and protect personnel and equipment during fault conditions. For all substations planning, economical and effective GS plays an essential...

Speed control of Brushless DC (BLDC) motor based on conventional control schemes are now most commonly used in industries. Despite the fact that PI controllers maintained the steady state accuracy, these controllers pose difficulties such as load disturbances and parametric variations. FLC offers better speed response at dynamics and cancels distur...

Nowadays, it is highly important to predict the wind speed/direction (at any wind farm). In order to determine the demanded wind power that could be captured by the available wind turbines at the farm. Effective wind prediction has always been challenged by the nonlinear and non-stationary characteristics of the wind stream. This paper presents two...

Low frequency oscillations (LFOs) have a dramatic effect on small signal stability of a power system. As power system started to operate near its stability limits, LFOs might lead to system instability. Power system stabilizers (PSSs) are provided with automatic voltage regulator to damp such effects. In this paper, an interval type-2 fuzzy logic p...

Wind energy plays an important role as a contributing source of energy, as well as, and in future. It has become very important to predict the speed and direction in wind farms. Effective wind prediction has always been challenged by the nonlinear and non-stationary characteristics of the wind stream. This paper presents three new models for wind s...

In this paper, we have focused on several relevant sensors [Laser (for speed measurements), Sonar (for space scanning) and RF (for access rights)] to cooperate in monitoring the security status of multiple dynamic agent in surveillance area. Such coordination is achieved by employing novel concepts of sensors similarity and complementarity. Further...

Use of wind energy as a renewable source of energy for electric utility systems is increasing around the world. The major challenges of wind energy generation are natural intermittency, unpredictability, and uncertainty due to wind variations. In this paper, five different adaptive neuro-fuzzy wind predictors are proposed and compared to forecast t...

Multiple sensors fusion plays a major role in situation awareness, especially in modern dynamic security monitoring and tracking applications. In this paper, we focus on a specific effective set of complementary sensors [Laser (for speed measurements), Sonar (for space scanning) and RF (for access rights)]. A novel multi-agent system is obtained by...

Wind energy contribution as a new source of green energy in electric utility systems around the world is on fast increase. One of the major challenges is its natural intermittency; unpredictability, and uncertainty. In this paper, two and three dimensional profiles are presented for the torque coefficient and turbine output torque surface response....

Multiple sensors fusion plays a major role in situation awareness, especially in modern dynamic security monitoring and tracking applications. In this paper, we focus on a specific effective set of complementary sensors [Laser (for speed measurements), Sonar (for space scanning) and RF (for access rights)]. A novel multi-agent system is obtained by...

Wind energy contribution as a source of energy in electric utility systems around the world is on the increase. One of the major challenges of wind energy generation is its natural intermittency; unpredictability, and uncertainty. In this paper, two and three dimensional visualization profiles were presented for the power coefficient. Further, two...

A comparative study between type-1 and type-2 fuzzy systems, introducing the main differences in membership functions and operations done on these fuzzy sets, as well as defuzzification/ type-reduction, is introduced in this paper. Fuzzy sets with view of membership functions of type-1 and type-2 are illustrated along with the foot print of uncerta...

A comparative study between type-1 and type-2 fuzzy sets, introducing the main differences in membership functions and operations done on these fuzzy sets, is introduced in this paper. The idea of fuzzy sets and both membership functions of type-1 and type-2 are illustrated along with the idea of foot print of uncertainty (FOU). A new fuzzy control...

Modern RF Radar signal processing has been receiving much attention for wide range of domains that include industrial, environmental, and military applications. Inherently, the received raw spatial-temporal signals can be 1-D, 2-D, or 3-D and are usually of uncertain nature, because of changing conditions and optical background variations. In this...

This paper introduces a comparative study between conventional speed controllers of DC motor and an artificial intelligent speed controller showing the advantages of artificial intelligent controller over the conventional ones. All conventional controllers are implemented practically using a data acquisition card. Practical results are compared wit...