Print ISSN: 1681-6900

Online ISSN: 2412-0758

About Journal

Engineering and Technology Journal is a global, scientific and Open Access journal. Publishing under the license of Creative Commons Attribution 4.0 International (CC-BY), this journal is published monthly by the University of Technology (UOT), Iraq, since 1977 (printed version) and since 2005 (online version). ETJ publishes original articles and review papers in the fields of engineering and science. The journal uses a double-blind peer-reviewing system to assure the quality of the publication. The Turnitin service is used to prevent plagiarism and to ensure the...
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Journal Information

Publisher: University of Technology-Iraq

Email:  etj@uotechnology.edu.iq

Editor-in-chief: Prof. Dr. Qusay F. Alsalhy

Print ISSN: 1681-6900

Online ISSN: 2412-0758

Volume 37 (2019)
3B
4C
12A
11A
10A
9A
8A
7A
6A
3C
2B
5A
2C
1C
1B
4A
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2A
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Volume 36 (2018)
2B
12A
11A
2C
10A
1C
9A
8A
7A
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Volume 31 (2013)
Issue 21
Issue 20
Issue 19
Issue 18
Issue 17
Issue 14
Issue 15
Issue 16
Issue 12
Issue 13
Issue 10
Issue 11
Issue 7
Issue 8
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Issue 5
Issue 6
Issue 4
Issue 4
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Issue 3
Issue 1
Issue 1
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Volume 28 (2010)
Issue 24
Issue 22
Issue 23
Issue 20
Issue 21
Issue 18
Issue 19
Issue 16
Issue 17
Issue 14
Issue 15
Issue 12
Issue 13
Issue 10
Issue 11
Issue 8
Issue 9
Issue 6
Issue 7
Issue 4
Issue 5
Issue 1
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Issue 3

Volume 41, Issue 2 (Electrical Engineering), February 2023


Gaussian Process for GPS Receiver Predictor and INS GPS Integration

Nawras K. Ahmed; Sameir A. Aziez; Ali Y. Khenyab

Engineering and Technology Journal, 2023, Volume 41, Issue 2, Pages 1-13
DOI: 10.30684/etj.2022.131426.1037

Global Positioning System (GPS) has become important and necessary in daily life.  It is possible to reach any destination using GPS, which is included in many lands and marine applications.  In this work, GPS was applied to a real navigation boat, integrated with the inertial navigation system (INS) device, and installed on the boat. The navigational devices were linked to the (mission planer) program, through which the results of the navigation process were shown. The system can provide better navigation performance accuracy and reliability due to the integration between GPS and INS. The data extracted from the navigation devices are processed using the Gaussian process (GP) prediction algorithm, to perform the GPS synchronization with the INS and predict the GPS cut-off values for specified periods. The prediction results of the GP algorithm are effective for the cut-off GPS data as the apparent error amount of the algorithm is low. In addition the inertial navigation system provides the location, speed, and position of the boat, but it contains a cumulative error that increases over time. On the other hand, the GPS better accuracy with a lower data rate than  the INS, so the integration system between INS/GPS is necessary. It must be developed to overcome the negatives in both systems. Two types of integration were introduced and implemented herein: loosely and tightly. From the results obtained, one can see that the tight system is better at improving errors.

Reliability Assessment Based on Optimal DGs Planning in the Distribution Systems

Ali M. Jaleel; Mohammed K. Abd

Engineering and Technology Journal, 2023, Volume 41, Issue 2, Pages 1-14
DOI: 10.30684/etj.2021.131169.1010

Due to increased load demands, distribution systems suffer from high power losses, low voltage levels, high current, and low reliability. To solve these problems, integrate distributed generator units (DG) into the distribution system. DG units are among the most popular methods of improving distribution system reliability, power losses, and bus voltage improvement through the placement and selection of distributed generator units in an optimal location and size. This work proposed Enhanced Particle Swarm Optimization (EPSO) technology to find the optimum location and size of DG units to reduce power losses, improve bus voltage level, and employed the Transient Electricity Analyzer (ETAP) to evaluate the reliability of the distribution system network. ETAP is a programming tool for modeling, analysis, design, optimization, operation, and control of electrical power systems. These findings may be useful in conducting reliability assessments and correctly utilizing dispersed generation sources for future power system growth by power utilities and power producer companies. The proposed method was employed on the Iraqi distribution system (AL-Abasia distribution network (F10 feeder)). After adding three DG units to the distribution system, theer adding three DG units to the distribution system, the obtained simulation results showed a significant reduction in power losses, voltage levels, and reliability enhancement.

A Modified Global Management Controller for a Grid-connected PV System with Battery under Various Power Balance Modes

Diana S. Obaid; Ali J. Mahdi; Mohammed H. Alkafaji

Engineering and Technology Journal, 2023, Volume 41, Issue 2, Pages 1-14
DOI: 10.30684/etj.2022.132323.1102

This work presents an Energy Management System (EMS) constructed on dissimilar power balance modes and dynamic grid power to activate a DC-link microgrid with a solar (PV-array) generator and battery storage. In addition, the option of requesting adjustable power from the grid to encounter load demand is also presented.  Based on the availability of solar sources, battery state, and grid power, energy management offers the appropriate references for all modes. Six power balance options are defined based on power supply, storage system, and grid mobility to match the load requirement. The aims are to reduce energy usage and upsurge the life of the storage device. The microgrid is controlled to maintain a consistent DC-link voltage and manage the battery current depending on the mode of operation. Using MATLAB\SIMULINK software, the anticipated energy management system, which is based on power balancing modes, is tested under various scenarios. The simulation results demonstrated that the microgrid operated admirably, with seamless switching between power balance modes.

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