International Journal of Electrical and Electronics Engineering Studies最新文献

{"title":"Direct Reduction Plant Alternator Synchronization Using DC Motor and Synchronous Generator with Complete Reduced Machines Transient","authors":"Chizindu Stanley Esobinenwu, L. Owuda","doi":"10.37745/ijeees.13/vol9n14765","DOIUrl":"https://doi.org/10.37745/ijeees.13/vol9n14765","url":null,"abstract":"Direct Reduction Plant alternator synchronization using D.C. motor and synchronous generator with complete reduced machines transient is presented. This is very significance in the industrial world. Direct Reduction plant is an iron making process plant for the new era which utilizes natural gas to reduce iron ore to produce Direct Reduced Iron used in steel industry. An alternator is an electrical generator that converts mechanical energy into AC electrical energy. Synchronization is connection of an alternator into the grid in parallel with many other alternators that is live of constant voltage and frequency. Transient stability is one of the major factors for proper operation of the Direct Reduction plant production systems that lead to major system collapses. The stress on Direct Reduction plant machines systems is increasing day by day, due to faults, economic and environmental pressures, sudden load change, deviation of active power and frequency. This phenomenon constitutes negative threat to Direct Reduction plant stability. The study was carried out to examine the capacity and transient stability on the Direct Reduction plant machines to withstand disturbance while quality of service is maintained. The effect of improper phase condition upon the synchronizing process, phase sequence of three phase power line, direct current excitation effect upon the power deliver by alternator, power delivered by an alternator upon the torque delivered by the prime mover. The challenges were solved and analyzed using individual machine with the help of accurate step by step integration and Electrical Transient Analyzer Program MatLab software. Swing equation was solved using advanced Runge-Kutta’s method. An experiment was conducted in Electrical Engineering laboratory and machines transient stability of the plant was improved by 64 percent averagely. The results were depicted graphically for machines dynamic behavior studies and recommended for Technician and Engineers in steel and related industries","PeriodicalId":167829,"journal":{"name":"International Journal of Electrical and Electronics Engineering Studies","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126331372","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Optimization of Hybrid Solar PV and Diesel Generator System for an Efficient Electricity Supply","authors":"Chizindu Stanley Esobinenwu","doi":"10.37745/ijeees.13/vol9n13746","DOIUrl":"https://doi.org/10.37745/ijeees.13/vol9n13746","url":null,"abstract":"The operation and maintenance cost associated with running diesel generator autonomously is capital intensive and unfriendly to the environmentally. The paper examined hybrid diesel generator and solar (PV) based technology as an effective way to power an off grid facility. Solar PV integration impacted significantly on the energy production, thereby reducing the high operation and maintenance cost associated with diesel generator. Two scenarios were considered and implemented in HOMER software. The result obtained in the base case scenario when diesel generator was used shows [Cost of Energy: N0.712], [Net Profit Cost: N39.7M], [Operating Cost: N2.99M], [Fuel Cost: 1,857,800] and [O & M: N551880]. Also, the GHG emission [CO2:4863006Kg/yr], [CO:30.654kg/yr], [Unburned Hydrocarbon: 3,650kg/yr], [Particle matters: 507kg/yr], [Sulphur dioxide: 26811kg/yr], and [Nitrogen oxides: 78586kg/yr]. However, with the modified system, when diesel generator and PV system are integrated [Cost of Energy: N0.378], [Net Profit Cost: N21.1M], [Operating Cost: N886527M], [Fuel Cost: 530,555] and [O & M: N144, 660]. Similarly, the GHG emission [CO2: 1388788Kg/yr], [CO: 8,754kg/yr], [Unburned Hydrocarbon: 382kg/yr], [Particle matters: 53.1kg/yr], [Sulphur dioxide: 3,401kg/yr], and [Nitrogen oxides: 8224kg/yr]. Solar PV integration impacted significantly in mitigating GHG emission and high O&M cost associated with autonomous operation of diesel generator set.","PeriodicalId":167829,"journal":{"name":"International Journal of Electrical and Electronics Engineering Studies","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129569444","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Optimal Placement and Sizing of Distributed Generation (DG) Units in Electrical Power Distribution Networks","authors":"Irekefe A. Moses, Letting L. Kiprono, S. Talai","doi":"10.37745/ijeees.13/vol9n166124","DOIUrl":"https://doi.org/10.37745/ijeees.13/vol9n166124","url":null,"abstract":"Researchers' attention has recently been on the best ways to integrate Distributed Generation (DG) into the conventional centralized electrical power distribution systems, particularly in the context of the smart grid idea due to its reputation as a viable remedy for the lack of electric power supply. To optimize the environmental, financial, and technological advantages of DG units’ integration for distribution network operators, it is crucial to determine their ideal position and size. The main objective of this study was to develop and simulate an optimization system for the placement and sizing of distributed generation units in electrical power distribution networks for power losses reduction and voltage profile improvement. The specific objectives were to model and develop the load flow algorithm and codes; develop a meta-heuristic optimization algorithm and codes that selects the best location and size of the DG unit; simulate the nested load flow and optimization algorithms and codes on MATLAB and analyze the effectiveness of the developed algorithm via testing on the standard IEEE 33-bus radial electrical power distribution benchmark network. The Backward-Forward Sweep (BFS) technique was employed in the load flow modelling owing to its maximization of the radial structure of distribution systems. The optimization algorithm was developed based on the Multi-objective Particle swamp optimization (PSO) meta-heuristic technique due to its effective global searching characteristic. The line and load data for the IEEE 33-bus test network being a cutting-edge benchmark for contemporary power distribution networks; were obtained from the Power Systems Test Case Archive- a secondary data source. For this network fed by a synchronous generator, the chosen base MVA (Mega Volt Amp) was 10MVA and the base voltage was 12.66kV. The total active and reactive power demand were 3.715MW and 2.3Mvar respectively. The simulation was done on R2021a version of MATLAB/Simulink. The total real and reactive power losses obtained from base case simulation without the placement of any DG unit in the network were obtained as 201.8925kW and 134.6413kvar respectively while the per unit (p.u) average bus voltage was 0.948594 p.u. After the optimal allocation of one, two, three and four DG units, the total real power loss (in kW) in the network reduced by 140.89, 173.89, 189.89 and 195.89 respectively while the total reactive power loss (in kvar) reduced by 86.64, 114.64, 124,64 and 128.64 respectively. Likewise, the per unit average bus voltage improved by 0.0376p. u, 0.0458p.u, 0.0480p.u and 0.0498p.u respectively. Also, the decrease in the total real and reactive power losses and the improvement in bus voltage profiles varies proportionally with the number of DG units optimally placed. In conclusion, the results shows that the total real power loss and the total reactive power loss of the network, were significantly decreased; and the voltage profile of the system wa","PeriodicalId":167829,"journal":{"name":"International Journal of Electrical and Electronics Engineering Studies","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124348411","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Design and Construction of a Micro Controller Based Smart Automated System for Controlling Various Home Appliances","authors":"NdianaAbasi Akpan Stephen, Mmeri Genevive Okere, Ubadire Augustine Egwu, Joseph Oko-Chukwu Uchechukwu, Mfonobong Sunday Benson","doi":"10.37745/ijeees.13/vol9n1136","DOIUrl":"https://doi.org/10.37745/ijeees.13/vol9n1136","url":null,"abstract":"Smart Home Automated System is an inexpensive technology. This study presents the overall design of Home Automation System (HAS) with low cost and wireless system. This system is designed to assist and provide support in order to fulfill the needs of elderly and disabled in home. Also, the smart home concept in the system improves the standard of living at home. The sensors, relays and web browser are used to control the home appliances. The main control system implements wireless technology to provide remote access from smart phone. The design removes the existing electrical switches and provides more safety control on the switches with low voltage activating method. The system intends to control electrical appliances and devices in house with relatively low cost design, user- friendly interface and ease of installation. Alternatively, SMART HOME AUTOMATED SYSTEM can provide higher level of security and convenience compared to traditionally used systems. The main objective of the current paper is to design and implement cost-efficient and reliable security, safety and automatic home system for protection and occupants’ convenience. If any hazard is being sensed like smoke, excess heat, unauthorized movements etc; the system warns the home-owner in real-time using Short Message Service (SMS). With this project, home appliances can also be controlled within and away from home, at the same time gives access to real time monitoring of the appliances and properties.","PeriodicalId":167829,"journal":{"name":"International Journal of Electrical and Electronics Engineering Studies","volume":"139 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133608958","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Energy Management Solution using Internet of things","authors":"John Oluwadara Obademi, Lukman Bello, E. Ogunti","doi":"10.37745/ijeees.13/vol8n2129","DOIUrl":"https://doi.org/10.37745/ijeees.13/vol8n2129","url":null,"abstract":"Energy management is imperative at a time like this. Due to rising population and lack of adequate power supply to satisfy energy consumers, there is an urgent need to provide an efficient way to manage energy. This study proffers solution to the enormous challenge of managing energy by developing a model that helps both consumer and energy providers manage energy efficiently. This solution will enable monitoring of power over a specific period and intelligent switching of power sources. Thus, the energy consumer gets a detailed information of energy usage and specific time and duration of power switching between different energy sources. It assists energy providers such as the Electricity DISCOs (Distribution Companies) to monitor energy distribution. The study composes four distinct parts which are; the automatic transfer switch, the internet of things module, the mobile application and the cloud server. This study helps to intelligently chose between energy sources, observe and log power usage patterns of homes, provide analytics and insight to energy usage by consumers, provide ease, comfort and safety to users and optimally manage energy in homes.","PeriodicalId":167829,"journal":{"name":"International Journal of Electrical and Electronics Engineering Studies","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127457177","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"DEMATERIALISATION ET FRAUDE NUMERIQUE DES DOCUMENTS DANS LE SECTEUR DE L’ENSEIGNEMENT SUPERIEUR ET UNIVERSITAIRE EN RDC : Enjeux et Contraintes des TIC.","authors":"Yende Raphael Grevisse, L. A. T. Raymond-Albert, Kabiena Kabasele Emmanuel, Mukendi Malunda Cedrick, Kena Mulumba Clovis, Kanda Kabamba Isaac, Bukasa Mukengeshayi Jean-Claude","doi":"10.37745/ijeees.13/vol8n23045","DOIUrl":"https://doi.org/10.37745/ijeees.13/vol8n23045","url":null,"abstract":": La présente recherche se veut d’illustrer les difficultés liées à la gestion de l’information et des documents qui deviennent du jour au lendemain important dans les entreprises, particulièrement dans le secteur de l’enseignement supérieur et universitaire en RDC. Rappelons que la fraude numérique dont il question, se définie comme tout moyen d’usurper ou de falsifier un document par le moyen informatique, une identité d’une personne, d’utiliser de faux documents, de remplir des formulaires de manière erronée et autres pratiques négatives numériques y relatives, dans le but d’obtenir une identité nationale, des prestations académiques et scolaires, des preuves de paiement de frais académiques et scolaires ou tout autre sujet octroyant des droits ou des privilèges illicites. Ces documents en question sont : faux titres d’identité, fausses pièces d’état-civil et autres, faux justificatifs du parcours scolaire ou académique, faux diplômes, faux relevés des notes ou bulletins et autres documents, qui servent notamment de support à certaines fraudes numériques dans le secteur de l’enseignement supérieur et universitaire en RDC. La présente recherche pourra s’atteler également aux difficultés des vrais documents numériques délivrés sur la base de fausses informations par manque des mécanismes d’authentification fiables et de contrôle dans ledit secteur. Et pour clore, elle présentera différentes recommandations et modèles efficaces basés sur le plagiat et le l’authentification des signatures numériques des documents, ainsi que la proposition d’un modèle d’interaction et d’échange des informations et documents sensibles entre les différentes institutions d’enseignement supérieur et Universitaire de la RDC et leurs partenaires financiers, étatiques et autres dans un environnement sécurisé…","PeriodicalId":167829,"journal":{"name":"International Journal of Electrical and Electronics Engineering Studies","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128344097","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"PID Power Controller to a Setpoint of Fluid Level Height in a Reservoir for Unattended Human Monitoring","authors":"Anwar H. Al-Assaf, O. Alrebei, Abdulkarem I. Amhamed, Mahmoud Hayajnh, Ward Fawaz, Ahmad S. Al-Tawaha","doi":"10.37745/ijeees.13/vol10n1pp113","DOIUrl":"https://doi.org/10.37745/ijeees.13/vol10n1pp113","url":null,"abstract":"This paper provides a novel approach of a power control system of a fluid tank pump to reach a specific setpoint of fluid level height. The system enables users to fill a tank to any desired height within a chosen time interval. The system is equipped with a timer that allows the user to fill the tank to the desired level within the desired time. The system is based on utilizing a Proportional Integral and Derivative (PID) controller to adjust the pump's power to satisfy the us-er-defined setups (time and fluid level height). This approach has the potential to be applied for domestic purposes for unattended human monitoring. This approach has been demonstrated using LabVIEW coding to apply the fluid and hydrodynamic design and control principles. The results have illustrated the code's capability to achieve the desired tank fluid level height for a variable range of fluid level height setpoints and time intervals","PeriodicalId":167829,"journal":{"name":"International Journal of Electrical and Electronics Engineering Studies","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124633976","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Development of a Low-Cost Portable Heartbeat Monitor Using an Infrared Sensor and a Microcontroller-Digital Stethoscope","authors":"Irekefe A. Moses, Francis K. Akingbade","doi":"10.37745/ijeees.13/vol10n1pp1436","DOIUrl":"https://doi.org/10.37745/ijeees.13/vol10n1pp1436","url":null,"abstract":"The problem of shortage of medical devices in rural areas of Nigeria, cause a budget to be limited and constrained. Therefore, developing medical devices at low cost is one solution. This paper proposes an improvement, portability, and cost-effectiveness of the heart rate measuring devices being applied in the Rural Local medical in Akure South Local Government Area of Ondo State of Nigeria; through the development of a Low-Cost Portable Heart Beats Monitor using an Infrared Sensor and a Microcontroller. The development of the prototype is to function as an assisting device for a user which has a busy lifestyle to monitor the heart rate at any place in the real-time condition. This report contains the detailed procedures involved in designing the heartbeat monitoring circuit, developing the circuit design, and carrying out the performance evaluation of the system developed. In this project, Infrared LED and photodiode have been used as a sensor to measure a heart rate and a PIC16F876A microcontroller acts as a controller to process the input and output of the device. The development of the prototype starts with designing the sensor circuit, signal conditioning circuit, voltage regulator circuit, microcontroller circuit, and dual power supply unit. After the functionality test, these circuits were integrated with the output display. The prototype design is able to display the heart rate measurement in beats per minute (BPM) and the condition of heart rate either low, normal, or high heart rate on a 16x2 matrix Liquid Crystal Display (LCD).","PeriodicalId":167829,"journal":{"name":"International Journal of Electrical and Electronics Engineering Studies","volume":"60 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126652936","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}