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31,456 Article Results

Performance enhancement of solar powered floating photovoltaic system using arduino approach

10.11591/ijpeds.v11.i2.pp651-657
Nur Amirah Abdul Jamil , Siti Amely Jumaat , Suriana Salimin , Mohd Noor Abdullah , Ahmad Fateh Mohamad Nor
This paper presents Performance Enhancement of Solar Powered Floating Photovoltaic System using Arduino Approach. In the project, an Arduino nano as a main controller of the system. The objective of this project to monitor performance of the voltage, current and power output respectively. Furthermore, the prototype of the research is testing in two conditions: on water surface and on a land area. Based on the results, the power of the photovoltaic on the water surface is increased compared on the land area. The conclusion for this project is it can generate electricity using floating photovoltaic and the same time to monitor output of the system.
Volume: 11
Issue: 2
Page: 651-657
Publish at: 2020-06-01

Computer-based solar tracking system for PV energy yield improvement

10.11591/ijpeds.v11.i2.pp743-751
Rini Nur Hasanah , Aditya Bagus Setyawan , Eka Maulana , Tri Nurwati , Taufik Taufik
Electric energy is the main driver of various daily activities, both to increase productivity as well as to improve life quality. Energy demand is continuously increasing in parallel to the progress in technology and population growth. Depletion of fossil energy sources and awareness of environmental protection make people resort to renewable energy sources like solar energy. Low efficiency and intermittent characteristic of solar energy may originate from the sun movement along the day as well as the year. Efforts have always been tried to deal with the drawbacks. This paper proposes a computer-based tracking system to fully monitor and control a solar panel movement. The designed system has proven a good performance of working at certain time intervals, either hourly, or even continuously, as desired. Energy yield improvement has been achieved by processing the tracking results with the help of a microcontroller to optimize the power generation of the solar panel.
Volume: 11
Issue: 2
Page: 743-751
Publish at: 2020-06-01

The ideal-actual gap in the roles of research in teaching

10.11591/ijere.v9i2.20583
Bryan Mallillin Nozaleda , Jhoanna Battung Calubaquib
This study aimed to create an image of how research integrates in university teaching particularly in STEM education in a state university in Philippines. The participants were 104 teachers from five campuses of the university that offers STEM undergraduate programs. A quantitative research design was employed to address the central theme: The identification of the gap between the beliefs and perceptions of STEM Educators regarding the role of research in university teaching. T-test was used to test the difference between the actual and ideal beliefs of teachers. Cohen’s d values were computed to determine the effect sizes. The present study revealed that the STEM teachers highly valued the role of research in teaching. They especially considered the development of creative and critical dispositions as the most important goals of integrating research into teaching. However, the teachers reported low actual integration of research into their current teaching, revealing a major gap between their beliefs and the perceived actual integration research into their own teaching practices as evident in the result of the statistical tests. It further showed that institutional background appeared to be critical in the integration of research in teaching. Ultimately, STEM education in the university is emphatic on research content in the delivery of instruction while creating opportunities for learners to participate along the learning process. However, a research-based approach remains to be unpopular, much less for a research-oriented classroom. Strengthening research support and widening the scope of research culture are recommended.
Volume: 9
Issue: 2
Page: 318-325
Publish at: 2020-06-01

Jammer against eavesdropper in half-duplex energy harvesting cooperative relaying networks: secrecy outage probability analysis

10.11591/ijpeds.v11.i2.pp879-885
Phu Tran Tin , Duy-Hung Ha , Minh Tran , Tran Thanh Trang
In this paper, we have investigated the Half-Duplex (HD) Energy Harvesting (EH) Cooperative Relaying Networks with one source node, one destination node, one intermediate relay and in the presence of the Jammer Against Eavesdropper. We have analyzed the system performance in terms of the integral form expression of secrecy outage probability. In addition, we have investigated the effect of source rate, time switching factor, energy coefficient, and the ratio Ps/N0 on the system performance. Finally, all the mathematical, analytical expressions are verified by Monte Carlo simulation, and the analytical results match well with the simulation ones to convince the correctness of the analytical expression.
Volume: 11
Issue: 2
Page: 879-885
Publish at: 2020-06-01

Contribution of DGs in the stability and voltage drop reduction for future MV network in desert regions

10.11591/ijpeds.v11.i2.pp977-987
Bouafia Abdelkader , Labed Djamel
Day by day, the integration of decentralized generation in medium voltage networks becomes more important during the last years and even in the near future. This increase causes, at the same time, several negative effects and rarely positive impacts on the stability of the network. Therefore, this work aims at analyzing the impact of ambient temperature on radial distribution network parameters’ e.g.: voltage drop and stability voltage level (index). Based on MATLAB program, different analyses of distributed generation (DG) insertion influence’s on voltage drop in the radial distribution feeder, as well as the influence of climatic conditions such as ambient temperature on network parameters. The Integration of Photovoltaic DGs in MV networks can play an important role in reducing the global warming effect (in voltage drop, and voltage stability index) especially in radial distribution feeder. Furthermore, it protects network’s parameters if its location and power are well selected.
Volume: 11
Issue: 2
Page: 977-987
Publish at: 2020-06-01

Fire alert system through text messages, with arduino mega technology and GSM SIM 900 module

10.11591/ijeecs.v18.i3.pp1215-1221
Omar Chamorro Atalaya , Dora Arce Santillan
The purpose of this article is to develop a fire alert system, to implement under the use of Arduino Mega technology and GSM module SIM 900 (GSM: Global System for mobile communications, SIM: Minimum System), with which through The programming and interconnection between these components can be obtained by capturing data through MQ2 sensors installed in the Industrial Automation Laboratory of the National Technological University of South Lima, and then send a fire alert signal through text messages to a mobile equipment located outside the laboratory; at a distance of 1000 meters; The relevance of this research is that its optimal response, detects the application of this system to the industrial park of Villa El Salvador, which has multiple warehouses, which a newspaper is affected by fire hazards, by the amount of flammable material They owned. Developing the investigation will determine the existence of a correlation factor of 0.973, between the reception time of the alert signal, with respect to the distance in the MQ2 sensor to detect the smoke; This factor tells us to state that the correlation is significant between both variables; with a ratio percentage equal to 98.90%, which was selected by the determination factor R2. 
Volume: 18
Issue: 3
Page: 1215-1221
Publish at: 2020-06-01

Comparative performance analysis of bridgeless boost and bridgeless buck converter for UPS application

10.11591/ijpeds.v11.i2.pp801-809
Khairul Safuan Muhammad , Rahimi Baharom , Siti Zaliha M. N , Wan Noraishah Wan Abdul Munim
In this paper, a comparative performance analysis of bridgeless boost and bridgeless buck converter for Uninterruptable Power Supply (UPS) is presented. The performance of UPS application in terms of their efficiency is compared between the conventional diode bridge converter and both bridgeless converters. The input supply power quality is also been analysed by applying open and closed loop control techniques to the converter. The results show that the efficiency and the input supply quality of the bridgeless converters are significantly improved. UPS using bridgeless boost converter has better performance in all aspect compared to bridgeless buck converter. Aligned with that, the closed loop controller for the converter has also improved the efficiency and PF more than the open loop controller in performing the UPS system. All the analytical work was performed using PSIM software.
Volume: 11
Issue: 2
Page: 801-809
Publish at: 2020-06-01

VM placement with effective energy management in cloud using optimal VM allocation framework (OVAF)

10.11591/ijeecs.v18.i3.pp1531-1538
Susmita J A Nair , T R Gopalakrishnan Nair
The performance of servers at the data centers is affected when the servers are overloaded. To overcome this problem, the workload at the overloaded servers has to be redistributed to other servers which is possible with live VM migration. Live migration plays a crucial role in handling the overload at the data centers without service interruption. However, live migration also incurs some performance loss and energy overhead. The energy consumption at the data centers is a matter of utmost concern both in terms of economy and ecology. In this paper we are proposing a novel approach to find the most suitable server for VM placement. We have introduced an Optimal VM Allocation Framework (OVAF) in which the hosts at the source requests the destination for their available slots. Based on the response from the available servers, the utilization factor is calculated and the selection of appropriate destination for VM placement is done. Simulations carried out have shown 10% improvement in energy saving.
Volume: 18
Issue: 3
Page: 1531-1538
Publish at: 2020-06-01

Design and implementation of an efficient WPT system

10.11591/ijpeds.v11.i2.pp711-725
Abdulkareem Mokif Obais , Ali Faeq Ruzij
Wireless power transfer (WPT) is a technique introduced to transfer power wirelessly. Generally, WPT systems are characterized by low efficiency and low output power. Since WPT process depends mainly on mutual coupling between transmitting and receiving coils in addition to load requirements, it is focused in this work toward enhancing the mutual coupling and conditioning the receiving circuit so as to optimally satisfy the load demand. The mutual coupling between transmitting and receiving nodes is enhanced via inserting three resonating circuits along with energy transmission path and conditioning the receiving circuit such that it accomplishes delivering maximum power to the load node. In this work, an adaptive efficient WPT system is introduced. This system is carried out on PSpice and validated experimentally. Both simulative and experimental WPT systems have accomplished significant enhancement in efficiency. The proposed WPT system has three resonators and three parallel connected identical receiving coils located at 6.61m from the power transmitter. The efficiency enhancement approaches thousands of times the efficiency of a conventional WPT system having similar power transmitter located at the same distance from the receiving circuit, which has a single coil identical to those in the proposed efficient WPT system.
Volume: 11
Issue: 2
Page: 711-725
Publish at: 2020-06-01

Self-sustaining and externally-powered fixed, single, and dual-axis solar trackers

10.11591/ijpeds.v11.i2.pp1031-1039
A. H. Mohaimin , M. R. Uddin , A. Khalil
Power output from a small solar panel can be affected by its power consumption when it consumes power from the solar panel. There has been a lack of proper research and experiment in the use of small solar panel with tracking systems. Its significance was detailed in this paper where the voltage output are compared with those which were externally powered. The solar trackers and a microcontroller have been designed and fabricated for this research. Due to the use of the tracking system (single axis and dual axis), the power consumption varies from one to another and its effect on the voltage output. Several experiments have been conducted and it was concluded that small solar panels are not efficient enough to utilize with tracking capabilities due to an increase in power consumption. The externally powered system was found to generate 18% more output compared to a selfsustaining system and that the increase in average power consumptions compared to a fixed panel were 31.7% and 82.5% for single-axis and dualaxis tracker respectively. A concrete evidence was made that utilizing solar tracking capabilities for low power rated solar panel is unfeasible.
Volume: 11
Issue: 2
Page: 1031-1039
Publish at: 2020-06-01

Model of organizational abilities among secondary school teachers

10.11591/ijere.v9i2.20549
Dona Ningrum Mawardi , C. Asri Budiningsih , Sugiman Sugiman , Habibi Habibi
This study confirms the correlation model constructed among organizational abilities variables of secondary school teachers. The organizational abilities variables are: organizational commitment, and professional commitment, job satisfaction, and job performance. The samples are secondary school teachers selected using purposive sampling techniques. Data were collected through a rating scale questionnaire (1-5) and analyzed using Lisrel 8.0 program. The results show that professional commitment has a significant effect on organizational commitment and job satisfaction with values of 2.72 and 2.60. Other findings that organizational commitment and job satisfaction have an effect on job performance with values of 2.36 and 2.02. Empirically, the results concluded that the correlation among the variables theoretically fulfilled the fit criteria.
Volume: 9
Issue: 2
Page: 407-414
Publish at: 2020-06-01

Optimal location of unified power flow controller genetic algorithm based

10.11591/ijpeds.v11.i2.pp886-894
Sana Khalid Abdul Hassan , Firas Mohammed Tuaimah
Now-a-days the Flexible AC Transmission Systems (FACTS) technology is very effective in improving the power flow along the transmission lines and makes the power system more flexible and controllable. This paper deals with overload transmission system problems such as (increase the total losses, raise the rate of power generation, and the transmission line may be exposed to shut down when the load demand increase from the thermal limit of transmission line) and how can solve this problem by choosing the optimal location and parameters of Unified Power Flow Controllers (UPFCs). which was specified based on Genetic Algorithm (GA) optimization method, it was utilized to search for optimum FACT parameters setting and location based to achieve the following objectives: improve voltages profile, reduce power losses, treatment of power flow in overloaded transmission lines and reduce power generation. MATLAB was used for running both the GA program and Newton Raphson method for solving the load flow of the system The proposed approach is examined and tested on IEEE 30-bus system. The practical part has been solved through Power System Simulation for Engineers (PSS\E) software Version 32.0 (The Power System Simulator for Engineering (PSS/E) software created from Siemens PTI to provide a system of computer programs and structured data files designed to handle the basic functions of power system performance simulation work, such as power flow, optimal power flow, fault analysis, dynamic simulations...etc.). The Comparative results between the experimental and practical parts obtained from adopting the UPFC where too close and almost the same under different loading conditions, which are (5%, 10%, 15% and 20%) of the total load. can show that the total active power losses for the system reduce at 69.594% at normal case after add the UPFC device to the system. also the reactive power losses reduce by 75.483% at the same case as well as for the rest of the cases. in the other hand can noted the system will not have any overload lines after add UPFC to the system with suitable parameters.
Volume: 11
Issue: 2
Page: 886-894
Publish at: 2020-06-01

Advanced control scheme of a unifiedpower flow controller using sliding mode control

10.11591/ijpeds.v11.i2.pp625-633
Abdellatif Hinda , Mounir Khiat , Zinelaabidine Boudjema
This paper presents an advanced control scheme based on sliding mode control of a unified power flow controller (UPFC). This controller can generate a number of benefits in terms of static and dynamic operation of the power system such as the control law is synthesized with two kinds of controllers: sliding mode controller (SMC), and proportional integral (PI). Their respective performances are compared in terms of reference monitoring, sensitivity to disturbances and robustness. We have to study the problem of controlling power in electric system by UPFC. The simulation results show the effectiveness of the proposed strategy especially in chattering-free behavior, response to sudden load variations and robustness. All the simulations for the above work have been carried out using MATLAB/Simulink. Various simulations have given very satisfactory results and we have successfully improved the active and reactive power flows on a line of transmission, as well as to control voltage at the bus where it is connected, the studies and illustrate the effectiveness and capability of UPFC in improving power.
Volume: 11
Issue: 2
Page: 625-633
Publish at: 2020-06-01

Bluetooth embedded digital ammeter with android app data logging

10.11591/ijeecs.v18.i3.pp1400-1407
Chin Fhong Soon , Boon Huei Teng , Kian Sek Tee , Siat Ling Jong , Mohd Khairul Ahmad , Marlia Morsin , Tiong Hin Ong
Monitoring current supplies to light emitting diode (LED) luminaires is one of the reliability tests performed manually. Bluetooth (HC-05) embedded digital ammeter was proposed to acquire currents of a badge of LED products and hence, quality can be assured. Android App was designed to remotely record the current supplies to the different models of LED products and checking if the current measured is within the allowed range. The current data can be further analysed to control the quality of the LED luminaires produced. The pass and fail-current range can be set in the digital ammeter for alerting abnormal current measured by the operator. Therefore, IOT embedded digital ammeter will help in monitoring data consistency of LED products and improve quality assurance procedure.
Volume: 18
Issue: 3
Page: 1400-1407
Publish at: 2020-06-01

Single phase 21 level hybrid multilevel inverter with reduced power components employing low frequency modulation technique

10.11591/ijpeds.v11.i2.pp810-822
Sheikh Tanzim Meraj , Nor Zaihar Yahaya , Kamrul Hasan , Ammar Masaoud
This paper introduces a new hybrid topology of multilevel inverter capable of generating 21-level output voltage. The proposed topology is built using the combination of cross-switched bridge and a conventional full H-bridge. Compared to the conventional topologies and other hybrid topologies, the newly introduced multilevel inverter has the ability to maximize the number of voltage levels utilizing lower number of DC voltage sources, integrated bipolar transistor (IGBT) switches and gate drivers. A low frequency modulation technique is used to generate the ideal multilevel output voltage and gate pulses. Furthermore, the proposed topology is validated by building a hardware prototype and obtaining relevant experimental results. The acquired simulated and experimental results indicate the proper functioning of the proposed hybrid topology along with the compatibility of the applied modulation technique.
Volume: 11
Issue: 2
Page: 810-822
Publish at: 2020-06-01
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