Gomaa F. A. OsmanBenha University · Department of Electrical Engineering (Benha)
Gomaa F. A. Osman
Ph.D.
About
15
Publications
5,973
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
98
Citations
Introduction
Gomaa F. A. Osman currently works as a lecturer of Electrical Engineering at the Benha Faculty of Engineering, Benha University. Gomaa does research in Electrical Engineering for underground power cable thermal analysis performance.
Additional affiliations
December 2012 - December 2015
Faculty of Engineering, Benha University
Position
- Demonstrator
Publications
Publications (15)
In most underground power cables, cross‐linked polyethylene (XLPE) is utilized as the main insulating material, while polyvinyl chloride (PVC) is usually used as a nonmetallic sheath or jacketing for the cable. Accordingly, improving the electrical and thermal characteristics of these materials leads to an increase in cable dielectric strength, bes...
Nonlinear loads have become more prevalent in all applications, including computers, transformers, and adjustable speed drives. The harmonic level of the underground distribution cables rises as a result of these loads. As a result, the cable layers' temperatures are affected by the harmonic levels. The purpose of this paper is to calculate the tem...
As it is known that the increasing of harmonic currents levels on distribution system have effected on the cable current capacity. Harmonic current orders will cause increasing in the temperature of the conductor inside the cable which may exceed the limit value. The goal of this paper is to study thermal analysis of distribution cables to calculat...
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...
This paper presents a study of the performance of power cables installed inside non-metallic ducts. Cable capacity calculations for this type of installation are done. The thermal analysis of cables inside ducts which are installed in air as riser or buried in soils is presented. According to IEC 60287 cables can be installed in fibre ducts in conc...
Dry zone formation around underground power cables during load cycling may lead to thermal failure of the cable's insulation. This phenomenon has to be recorded to send an alarm to the maintenance crew when the soil around the cable reaches the critical value at which the dry zone has started to be formed. In this study, the buried cable thermal mo...
Formation of dry zones around power cables is an important factor affecting the cable loading and may lead to cable failure. This phenomenon is ignored by some standards in the calculation of power cables capacity. Numerous efforts have been done by many researchers for cable monitoring. In this study, monitoring system based on measurements of tem...
This paper studies the speed sensor-less Field Oriented Control (FOC) of permanent magnet synchronous motor (PMSM) fed by a space vector pulse width modulation (SVPWM). The characteristics for the PMSM is considered by two different algorithms, the first one is a Model Reference Adaptive System (MRAS) and the second algorithm utilized Adaptive Neur...
As it is known the load of distribution cables is not constant with respect to the daytime, increasing the current in some hours may lead to an increase of soil surrounding the cable resistivity due to the migration of soil moisture content. Formation of dry zones may cause failure of cable insulation. Also because the soil thermal properties chang...
One aim of this paper is to calculate the temperature distribution of the cable conductor and the soil surrounding the cable under cyclic loading conditions taking into account the formation of a drying zone in the backfill material. The thermal model of the underground cable is considered by using the IEC 60853-2 method, including the effects of t...
This paper presents a controller which consists of a Proportional, Integral (PI) and fuzzy speed controller for the sensorless speed control of Permanent Magnet Synchronous Motor (PMSM) using Model Reference Adaptive System (MRAS). In this paper the sensorless control of PMSM is studied. The study contains two main purposes; the first is to find a...