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29,905 Article Results

Calculate the optimum slot area of elliptical microstrip antenna for mobile application

10.11591/ijeecs.v16.i3.pp1364-1370
Raad H. Thaher , ِAli Khalid Jassim
Designing and analysis the antenna parameter, for the calculation optimum the slot area for a new broadband elliptical antenna for mobile application, to enhancement impedance bandwidth. Two equations have been obtained, representing the first relationship between the area of the slot and the area of the patch, and the second represents the area of the slot to the wavelength of the band frequency. The antenna was implemented and gets simulation result using CST software and manufacturing on an FR-4 material with =4.3, tan (δ) =0.002 and the feeding line has a characteristic impedance of 50Ω. The proposed antenna is operating in the bandwidth 24GHz and the gain (6.8) dBi.
Volume: 16
Issue: 3
Page: 1364-1370
Publish at: 2019-12-01

Design and implementation a security system for bank using voice recognition

10.11591/ijpeds.v10.i4.pp2126-2129
Mohammed Hasan Ali , Qasim mohamed Al Azze
In this work, a new security system design is demonstrated based on the sound signal for bank protection. Voice Acknowledgment Module is placed on the gate of the safe. Voice Acknowledgment Module is set to perceive the capable client as indicated by his sound recurrence reaction. The plan could program to permit tow clients for greater adaptability the card location strategy is executed utilizing individual data information to permit other client in the framework. A delicate camera is accustomed to observing the developments in the structure and for the reasons for wellbeing and security. All these sensors are controlled by arduino.
Volume: 10
Issue: 4
Page: 2126-2129
Publish at: 2019-12-01

Research on hybrid SHEPWM based on different switching patterns

10.11591/ijpeds.v10.i4.pp1875-1884
Tao Jing , Alexander Maklakov , Andrey Radionov , Sergei Baskov , Aleksandra Kulmukhametova
This paper presents a hybrid pulse width modulation (HPWM) strategy based on different switching patterns of selective harmonic elimination pulse width modulation (SHEPWM) for the three-level neutral point clamped (3L-NPC) converter. Specific low-order harmonics can be eliminated by SHEPWM at low switching frequency, while the remaining high-order harmonics can be selected to be simply filtered by additional hardware. Large oscillation waveform usually occurs in the transition instant between two diverse modulation situations, therefore switching between distinct switching patterns can be problematic if no effective means is taken, especially when the effect of smooth and fast transition at any time is considerable. A universal and valid control strategy, which maintains the high-quality output voltage and current, is proposed and implemented in this paper to address this issue. Simulation results obtained from MATLAB/SIMULINK are presented to analyze the performance and validate the feasibility and effectiveness of this control scheme.
Volume: 10
Issue: 4
Page: 1875-1884
Publish at: 2019-12-01

Evaluation of shale volume and effective porosity using larionov and archie equations from wire-line logs, Niger delta Nigeria

10.11591/ijaas.v8.i4.pp257-263
Mfoniso U. Aka , Johnson Cletus Ibuot , Francisca N. Okeke
In Niger Delta region of Nigeria, reservoirs are mostly loose and unstratified sands to hold fluids. In this paper, three different wells in central Niger Delta were assessed for shale volume and actual porosity. The results of the analysis delineate the presence of sand, sand-shale and shale formations. Hydrocarbon prospecting was found to be strong in sand, moderate in sandshale and shallow in shale respectively. However, existent of shale lessens effective porosity and water saturation of the rock formations. The extent of the formation extends from 1300 to 2500 m. Shale volume and actual porosity values extend from 0.00 to 0.302 dec and 0.047 to 0.302 dec which decrease with increasing depth. Comparably, the water saturation and water resistivity extend from 0.432 to 0.779 dec and 0.106 to 2.918 Ohm respectively. These values of actual porosity are strong in sand, moderate in sand-shale and shallow in shale formations. The results from this assessment proof well log a vital and easier tool in assessing of reservoir properties.
Volume: 8
Issue: 4
Page: 257-263
Publish at: 2019-12-01

A model for predicting photovoltaic module performances

10.11591/ijpeds.v10.i4.pp1914-1922
Nadia Bouaziz , Arezki Benfdila , Ahcene Lakhlef
The present paper deals with the development of a simulation model for predicting the performances of a solar photovoltaic (PV) system operating under current meteorological conditions at the site location. The proposed model is based on the cell equivalent circuit including a photocurrent source, a diode, a series and shunt resistances. Mathematical expressions developed for modeling the PV generator performances are based on current-voltage characteristic of the considered modules. The developed model allows the prediction of PV cell (module) behavior under different physical and environmental parameters. The model can be extended to extract physical parameters for a given solar PV module as a function of temperature and solar irradiation. A typical 260 W solar panel developed by LG Company was used for model evaluation using Newton-Raphson approach under MATLAB environment in order to analyze its behavior under actual operating conditions. Comparison of our results with data taken from the manufacturer’s datasheet shows good agreement and confirms the validity of our model. Hence, the proposed approach can be an alternative to extract different parameters of any PV module to study and predict its performances.
Volume: 10
Issue: 4
Page: 1914-1922
Publish at: 2019-12-01

Mitigation of power quality problems using series active filter in a microgrid system

10.11591/ijpeds.v10.i4.pp2245-2253
Awais Farooqi , Muhammad Murtadha Othman , Ahmad Farid Abidin , Shahril Irwan Sulaiman , Mohd Amran Mohd Radzi
Dynamic voltage restorer (DVR) is a series active filter device that is used to protect sensitive loads from power quality issues such as voltage sag, swell, harmonics or disturbances. This implies that the DVR is capable to mitigate power quality disturbances at load terminal. Harmonic is a major power quality problem polluting distribution network causing the end-user equipment to fail operating due to the occurrence of disturbances in voltage, current or frequency. This paper discusses on the DVR used as the proposed technique to mitigate the voltage sag and swell in a distribution network connected with energy storage system and mini-hydro turbine system.
Volume: 10
Issue: 4
Page: 2245-2253
Publish at: 2019-12-01

Instructional leadership beliefs among Filipino pre-service teachers

10.11591/ijere.v8i4.20275
Rudolf T Vecaldo
In the teacher education context, there has been a call to pay attention to the preparation of pre-service teachers for instructional leadership roles necessary in today’s various school reforms. Nonetheless, because the integration of instructional leadership is relatively new in the Philippine teacher education curriculum, there is a dearth of research along with this aspect. With the increasing need for more research on instructional leadership, particularly on Teacher Education Institutions (TEIs), this exploratory study was undertaken. Using an in-depth interview, it examined the instructional leadership beliefs of Filipino pre-service teachers. Twelve (12) graduating pre-service teachers from a public university in Cagayan Province, Philippines became the study participants whose views, insights, and narratives were thematically analyzed. Interestingly, the results of the study revealed that pre-service teachers believe that instructional leadership is shared, learning-focused, a conversation, service-driven, and a pursuit of equity. These deepen the assertion that understanding the instructional leadership beliefs of pre-service teachers would promote instructional interventions that can empower them and advocate a viable instructional leadership framework not only in the Philippine context but in the ASEAN region as well.
Volume: 8
Issue: 4
Page: 596-603
Publish at: 2019-12-01

Grid tied PV System using modular multilevel inverter

10.11591/ijpeds.v10.i4.pp2013-2020
Sujitha N. , Partha Sarathi Subudhi , Krithiga S. , Angalaeswari S. , Deepa T. , Subbulekshmi D.
A grid tied photovoltaic system using modular multilevel inverter topology is proposed in this paper. Basic unit structure of modular multilevel inverter used in this system is capable of converting DC power from PV array to AC power for feeding power to the household loads or utility grid. The proposed modular multilevel inverter structure has lesser power electronic devices compared to the existing multilevel inverter topologies. The proposed system generates a nearly sinusoidal signal and achieves better output profile with low total harmonic distortion. Simulation of the proposed system is carried out in MATLAB/Simulink software and the results are presented.
Volume: 10
Issue: 4
Page: 2013-2020
Publish at: 2019-12-01

Development of smart online partial discharge monitoring system for medium voltage power cable

10.11591/ijpeds.v10.i4.pp2190-2197
A. Z. Abdullah , M. Isa , M. N. K. H. Rohani , S. A. S. Jamalil , A. N. N. Abdullah , N. Azizan
This paper presents, the development of smart online partial discharge (PD) monitoring system for medium voltage (MV) underground power cable. PD monitoring is the highly efficient tool to monitor insulation degradation for high voltage (HV) equipment in order to avoid failures or breakdown. Selection of improved technology and performance of PD detection sensor, effective measurement technique and smart user friendly of graphical user interface (GUI) system are contributed towards the development of efficient monitoring system. This paper addresses three main aspects which are needed in completing the monitoring system. They are, the use of Rogowski coil (RC) as detection sensor, processing unit using Alterra board and integrated with GUI PD monitoring system for underground cable using LabVIEW. The monitoring system is compared to the conventional method with the PD signal used is measured from the real on-site measurement in order to analyse its performance. The analysis is performed in MATLAB and LabVIEW software’s environment and the maximum peak of PD signal is enabled to view using GUI which complete with the location information of PD source. Furthermore, this paper has contributed to solve the problem in selection the simplified and practical approach for PD sensor and monitoring system. In the perspective of automated condition monitoring, this smart online PD monitoring system provides a complete solution towards latest industrial revolutions
Volume: 10
Issue: 4
Page: 2190-2197
Publish at: 2019-12-01

IOT based application for monitoring electricity power consumption in home appliances

10.11591/ijece.v9i6.pp4988-4992
Korakot Luechaphonthara , Vijayalakshmi A
Internet of Things is one of the emerging techniques that help in bridging the gap between the physical and cyber world. In the Internet of Things, the different smart objects connected, communicate with each other, data is gathered from the smart objects and based on the need of the users, and the data gathered are queried and sent back to the user. IoT helps in monitoring electrical and physical parameters. Electricity consumption from electronic devices is one among such parameters that need to be monitored. The development of energy efficient schemes for the IoT is a challenging issue as the IoT becomes more complex due to its large scale the current techniques of wireless sensor networks cannot be applied directly to the IoT. To achieve the green networked IoT, this paper proposes a Wi-Fi enabled simple low cost electricity monitoring device that can monitor the electricity consumption on home appliances which helps to analyses the consumption of electricity on a daily and weekly basis. 
Volume: 9
Issue: 6
Page: 4988-4992
Publish at: 2019-12-01

User selection protocols in FD PSP EH cooperative network over rayleigh fading channel: outage and intercept probability

10.11591/ijpeds.v10.i4.pp2130-2137
Phu Tran Tin , Minh Tran , Van-Duc Phan , Hoang-Nam Nguyen , Thanh-Long Nguyen
In this paper, we investigate the system performance in term of outage probability (OP) and intercept probability (IP) user selection protocols in full-duplex (FD) power splitting protocol (PSP) energy harvesting (EH) cooperative network over the Rayleigh fading channel. In this network, security and privacy issues are significant due to the possible eavesdropping by surrounding users. In this case, the security performance and reliable performance are represented by outage probability (OP) and intercept probability (IP), respectively. The power-splitting energy harvesting protocol is applied in our analysis. We rigorously derive the closed-form expressions of both OP and IP of the system and study the effect of various parameters. Finally, the Monte Carlo simulation results are also performed to confirm the correctness of all theoretical analysis derived.
Volume: 10
Issue: 4
Page: 2130-2137
Publish at: 2019-12-01

MATLAB/Simulink based simulations of KY converter for PV panels powered LED lighting system

10.11591/ijpeds.v10.i4.pp1885-1893
G. Sureshkumaar , Nithiyananthan Kannan , Sunil Thomas
The main objective of this research work is to develop KY conveter topology for renewable energy sources.Solar energy is the readily available and is the cheapest form of energy. It is non-polluting and environment friendly. The development of high static gain DC-DC converters is an important research area due to the crescent demand of this technology for several applications supplied by low DC output voltage power sources. It is used to provide the uninterruptable power supply and battery powered to the system. So here, step-up DC-DC converters based on the KY converter are proposed for LED lighting systems. The proposed topologies present high voltages and high efficiency for low input voltage and high output voltage applications. The simulation results of the proposed topology have been presented using MATLAB/SIMULINK software.
Volume: 10
Issue: 4
Page: 1885-1893
Publish at: 2019-12-01

Control and Supervision of a Solar Electric System

10.11591/ijpeds.v10.i4.pp2096-2100
Khadidja Benabed , Boudghene Stambouli Amine , Benabadji Noureddine
Energy consumption is one of the biggest concerns because it is increasing and it has a great impact on our environment. Photovoltaic energy is a possible response to the challenges of the energy transition of tomorrow. For proper operation, the solar photovoltaic system needs a rigorous supervision of its electrical and physical parameters. Monitoring is one of the foundations of photovoltaic maintenance engineering. This article describes the design and realization of a solar monitor for the monitoring of the correct operation of a mini power plant from panels photovoltaic.
Volume: 10
Issue: 4
Page: 2096-2100
Publish at: 2019-12-01

Laboratory environment monitoring and specimen transport robots

10.11591/ijra.v8i4.pp313-326
Yi-Chang Wu , Huan-Chun Wang
Robots have been used in various areas to replace manpower, reduce costs, and facilitate more effective resource allocation. This study sought to assist the business of the bureau by developing two robots using the Robot Operating System. The developed robots have autonomous intelligent navigation functions and are suited to monitor the environment of the laboratories in the bureau. One robot had a temperature and humidity sensor and an infrared thermal camera, and it could be used to patrol and monitor the laboratory environment. The other robot had drawers in which specimens could be placed; robotic arm in the elevator could coordinate and control elevators, enabling the robot to move and transport specimens autonomously. Plenty of tests were conducted to verify the feasibility and practicality.
Volume: 8
Issue: 4
Page: 313-326
Publish at: 2019-12-01

Modeling of three-limb three-phase transformer relates to shunt core using in industrial microwave generators with n=2 magnetron per phase

10.11591/ijece.v9i6.pp4556-4565
H. Outzguinrimt , M. Chraygane , M. Lahame , R. Oumghar , R. Batit , M. Ferfra
This paper describes the development and implementation of a digital simulation model of a three-phase transformer relates to shunt core transformer, which used to drive magnetron tubes in the microwave. The focus of this study is based on modeling of a new shell-type of three limbs three-phase transformer. The model uses to feed two magnetrons instead of one magnetron per phase. The proposed model is established on the simultaneous analysis of a duo electromagnetic lumped component equivalent circuit. This latter was implemented in a MATLAB environment under rated conditions. The results obtained from the application of the analytical method are provided results in conformity to the experimental tests in the case of single phase high voltage power supply for one magnetron.
Volume: 9
Issue: 6
Page: 4556-4565
Publish at: 2019-12-01
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