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28,719 Article Results

Potential of Implementing the Low Concentration Photovoltaic Systems in the United Kingdom

10.11591/ijece.v7i3.pp1398-1405
Siti Hawa Abu-Bakar , Firdaus Muhammad-Sukki , Daria Freier , Roberto Ramirez-Iniguez , Tapas Kumar Mallick , Abu Bakar Munir , Siti Hajar Mohd Yasin , Abdullahi Abubakar Mas’ud , Siti Sarah Abu-Bakar , Nurul Aini Bani , Mohd Nabil Muhtazaruddin
This paper discusses the prospect of integrating a novel type of low concentration photovoltaic (LCPV) design known as the rotationally asymmetrical compound parabolic concentrator (RACPC) in a building in the United Kingdom. This is done by proposing a number of building integration designs to create a zero carbon building. A cost reduction analysis of installing the LCPV systems in the country is also presented. It was found that an RACPC design could reduce the LCPV module’s manufacturing cost by 31.75% and the LCPV module’s cost per unit power output by 33.87% when compared with the conventional PV module.
Volume: 7
Issue: 3
Page: 1398-1405
Publish at: 2017-06-01

Small Signal Stability Analysis of Grid Connected Photovoltaic

10.11591/ijeecs.v6.i3.pp553-562
Shalom Lim Zhu Aun , Marayati Bte Marsadek , Agileswari K. Ramasamy
This paper primarily focuses on the small signal stability analysis of a power system integrated with solar photovoltaics (PV). The test system used in this study is the IEEE 39-bus. The small signal stability of the test system are investigated in terms of eigenvalue analysis, damped frequency, damping ratio and participation factor. In this study, various conditions are analyzed which include the increase in solar PV penetration into the system and load variation. The results obtained indicate that there is no significant impact of solar PV penetration on the small signal stability of large scaled power system.
Volume: 6
Issue: 3
Page: 553-562
Publish at: 2017-06-01

Smart Home and Ambient Assisted Living Based on the Internet of Things

10.11591/ijece.v7i3.pp1480-1488
H. Sayuti , R. A. Rashid , N. M. Abdul Latiff , M. R. Abdul Rahim , A. H. F. Abdul Hamid , M. A. Sarijari , N. E. Ghazali
This paper presents a Smart Home and Ambient Assisted Living (SHAAL) system that has been developed and tested in a real experimental home environment. SHAAL system is designed on wireless sensor network (WSN) linked to the cloud network on the Internet. The development of SHAAL is divided into two phases: the design of SHAAL network and the development of SHAAL applications. SHAAL network is made up of the home network which is the WSN, and the cloud network. The network is designed using TelG mote that operates under Zigbee technology and includes various sensor modules for SHAAL system. The cloud network consists of the gateway, the server and user devices running on third generation (3G) network. Using priority scheduling algorithm for data transmission, it is shown that the performance delay of this system on the test-bed experiment is 34.2 percent less compared to the theoretical study. The implementation of the experimental testbed has proven that SHAAL has been successfully designed and deployed in the real world.
Volume: 7
Issue: 3
Page: 1480-1488
Publish at: 2017-06-01

The Linear Model of a PV moduel

10.11591/ijpeds.v8.i2.pp900-906
Mohamed Abd-El-Hakeem Mohamed
This paper propose a new approach to determine a linear  mathematical model of a PV moduel based on an accurate nonlinear model  . In this study, electrical parameters at only one operating condition are  calculated based on  an accurate model. Then, first-order Taylor series approximations apply on the nonlinear model to estimate the proposed model at any operating conditionts. The proposed method determines the number of iteration times. This decreases calculation time and the speed of numerical convergence will be increased. And, it is observed that owing to this method, the system converged and the problem of failing to solve the system because of inappropriate initial values is eliminated. The proposed model is requested in order to allow photovoltaic plants simulations using low-cost computer platforms. The effectiveness of the proposed model is demonstrated for different temperature and irradiance values through conducting a comparison between result of the proposed model and experimental results obtained from the module data-sheet information.
Volume: 8
Issue: 2
Page: 900-906
Publish at: 2017-06-01

Elbow Flexion and Extension Rehabilitation Exercise System Using Marker-less Kinect-based Method

10.11591/ijece.v7i3.pp1602-1610
Rosdiyana Samad , Muhammad Zabri Abu Bakar , Dwi Pebrianti , Mahfuzah Mustafa , Nor Rul Hasma Abdullah
This paper presents the elbow flexion and extension rehabilitation exercise system using marker-less Kinect-based method. The proposed exercise system is developed for the upper limb rehabilitation application that utilizes a low cost depth sensor. In this study, the Kinect skeleton tracking method is used to detect and track the joints of upper limb and then measure the angle of the elbow joint. The users perform the exercise in front of the Kinect sensor and the computer monitor. At the same time, they can see the results that displayed on the screen in real-time. The measurement of elbow joint angles are recorded automatically and has been compared to the reference values for the analysis and validation. These reference values are obtained from the normal range of motion (ROM) of the elbow. The results show the average flexion angle of the elbow joint that achieved by the normal user is 139.1° for the right hand and 139.2° for the left hand. Meanwhile, the average extension angle is 1.72° for the right hand and 2.0° for the left. These measurements are almost similar to the standard range of motion (ROM) reference values. The skeleton tracking works well and able to follow the movement of the upper arm and forearm in real-time.
Volume: 7
Issue: 3
Page: 1602-1610
Publish at: 2017-06-01

Node Disjoint Random and Optimal Path Selection (NDROPS) Algorithm for Security in MANETS

10.11591/ijece.v7i3.pp1197-1203
P. Suma , O. Nagaraju , Md. Ali Hussain
Mobile Adhoc Networks are shortly called MANETs. In these types of networks, fixed infrastructures are absent and are dynamic in nature. Nodes are movable, and they are not connected with any wires. For monitoring or supervising the transmissions in MANETS, no central supervision is present. Moving nodes, dynamic topology, and absence of infrastructure are the features of MANETs. These features are advantageous where wires cannot be used and where nodes are supposed to move. But there is a problem of security. Networks are highly prone to attacks where finding the root of the cause is very hard. Many nodes disjoint routing algorithms are proposed to balance the load, to cope up with link failures, etc. This paper proposes an algorithm called Node Disjoint Random and Optimal Path Selection (NDROPS) algorithm which uses the concept of dynamic routing and node disjoint routing to provide all the above-stated advantages along with security. Routing of data packets is done through few paths which are node disjoint. The main essence of this algorithm is to distribute the data among different routes. So, a malicious node in a path can retrieve only a few packets in random.  The simulation of the proposed NDROPS algorithm is performed and the performance is compared using throughout and packet drop probability.
Volume: 7
Issue: 3
Page: 1197-1203
Publish at: 2017-06-01

Multilevel Inverter Fed Switched Reluctance Motors (SRMs): 6/4, 8/6 and 10/8 SRM Geometric Types

10.11591/ijpeds.v8.i2.pp584-592
Nabil Farah , M.H.N. Talib , Jurifa Lazi , Majed Abo Ali , Z. Ibrahim
Nowadays power electronics circuits are embedded to most of electrical application areas. This approached offers a great control mechanism with simple and easy circuit configuration. Switched Reluctance Motor (SRM) is one of the most recent apparatus which draws a great number of researchers’ interests. Previously several attempts are made to use the power converters as driver for SRM such as Voltage Source Inverter (VSI) and bridge converters. This paper presents an analysis study of three level inverter to control the SRM. The inverter is controlled using space vector modulation SVM. The aim of this paper is to report the use the multilevel inverter to be fed into the SRM. The implementation of the multilevel inverter is abl to reduce the Total Harmonics Distortion (THD). Performance comparison are made between the multilevel and previous power electronics circuits that applied to the SRM. The simulation results have been conducted by MATLAB/SIMULINK software.
Volume: 8
Issue: 2
Page: 584-592
Publish at: 2017-06-01

Topological Comparison of Dual-Input DC-DC Converters

10.11591/ijpeds.v8.i2.pp804-811
A. Lavanya , K. Vijaya Kumar , J. Divya Navamani
Dual input dc-dc converters have two input voltage sources  or one input source and an energy storage system like ultra capacitor, PV, battery, super capacitors and a single output load. In order to process the power in hybrid energy systems using reduced part count, researchers have proposed several multi-input dc-dc power converter topologies to transfer power from different input voltage sources to the output. This paper compares non-isolated dual-input converter topologies topologically ,based on the components count, various fields of application and  different modes of operation for hybrid systems mainly used in electric vehicles  and renewable energy systems composed of energy storage systems (ESSs) with different voltage-current characteristics. Dual input dc-dc converter topologies considered in this paper are investigated using MATLAB and PSIM software and output voltage and inductor current waveforms are shown.
Volume: 8
Issue: 2
Page: 804-811
Publish at: 2017-06-01

Mathematical Computing of Coniferous Tree Ignition by the Cloud-to-Ground Lightning Discharge using Joule-Lenz's Law

10.11591/ijece.v7i3.pp1337-1346
Nikolay V. Baranovskiy , Geniy V. Kuznetsov , Tatiana N. Nemova
The natural phenomenon of thunderstorm activity is one of many causes of a forest fire. Thunderstorms cause especially intensive fire danger situations within remote areas and highlands. As a rule, a cloud-to-ground lightning discharge is the fire source. The present study is based on the research results of electrical overloads in supply networks. Physical and mathematical formulation and numerical solution for the problem of a coniferous tree (pine) ignited by a cloud-to-ground lightning discharge are presented. The problem is considered in a cylindrical coordinate system in two-dimensional formulation. The features of current passage and heat transfer taking into account the reactive wood localization are investigated. The Joule-Lenz’s law is used to calculate heat production in a tree trunk. Parametric analysis has been conducted and tree trunk ignition conditions have been determined in a typical range for the influencing parameters of negative and positive discharges.
Volume: 7
Issue: 3
Page: 1337-1346
Publish at: 2017-06-01

Short-Term Measurements of Household Electricity Demand During Hot Weather in Kuala Lumpur

10.11591/ijece.v7i3.pp1436-1443
Nassir Ranjbar , Sheikh Ahmad Zaki , Nelidya Md Yusoff , Fitri Yakub , Aya Hagishima
The aim of this study was to conduct short-term measurements on household electricity demand under hot weather conditions in a residential area in Kuala Lumpur. The measurements included total and air conditioner (AC) electricity consumption of 10 households in an apartment building as well as outdoor air temperatures, which were collected from March to May 2016. Results indicated that the average AC electricity consumption contributed to a major portion of total household electricity consumption, which ranged from 19.4 to 52.3% during the measurement period. Additionally, 1-minute interval time series data indicated household energy consumption more accurately than 30- or 60-minute interval.
Volume: 7
Issue: 3
Page: 1436-1443
Publish at: 2017-06-01

Effect of Humidity on Partial Discharge Characteristics of Epoxy/Boron Nitride Nanocomposite under High Voltage Stress

10.11591/ijece.v7i3.pp1562-1567
Noor ‘Aliaa Awang , Faris Akmal Suhaini , Yanuar Z. Arief , Mohd Hafizi Ahmad , Noor Azlinda Ahmad , Nor Asiah Muhamad , Zuraimy Adzis
Partial discharge (PD) may lead to the degradation of insulating materials and affect the lifetime of high voltage equipment. This paper describes the effect of relative humidity on PD characteristic of epoxy/boron nitride (BN) nanocomposite under high voltage (HV) stress. In this work, CIGRE Method II was utilized as an electrode configuration. BN nanofiller was chosen because of its high insulating properties with high thermal conductivity. The PD characteristics such as PD charge magnitude, PD number or occurrence, and average of PD charge during certain of ageing time under HV stress against relative humidity were examined. The results revealed that PD number of humid samples is higher about 8~14% compared to the normal ones. It is considered due to the decrease of surface resistance of the humid samples. The PD charge magnitudes of humid samples are slightly higher compared to the normal ones. The epoxy/BN nanocomposite has lesser PD number and magnitude compared to the neat epoxy samples.
Volume: 7
Issue: 3
Page: 1562-1567
Publish at: 2017-06-01

Incipient Fault Detection of the Inverter Fed Induction Motor Drive

10.11591/ijpeds.v8.i2.pp722-729
D. Venkata Ramana , S. Baskar
Inverter fed Induction motor drives are deployed across a variety of industrial and commercial applications. Although the drives in the question are well known for their reliable operation in any type of environment, it becomes an important daunting critical task to have them in continuous operation as per the applications’ requirement. Identifying the faulty behavior of power electronic circuits which could lead to catastrophic failures is an attractive proposition. The cost associated with building systems devoted for monitoring and diagnosis is high, however such cost could be justified for the safety-critical systems. Commonly practiced methods for improving the reliability of the power electronic systems are: designing the power circuit conservatively or having parallel redundant operation of components or circuits and clearly these two methods are expensive. An alternative to redundancy is fault tolerant control, which involves drive control algorithm, that in the event of fault occurrence, allows the drive to run in a degraded mode. Such algorithms involve on-line processing of the signals and this requires Digital Signal Processing of the signals. This paper presents the FFT and Wavelet transform techniques for on-line monitoring and analyzing the signals such as stator currents.
Volume: 8
Issue: 2
Page: 722-729
Publish at: 2017-06-01

Uninterruptable Power Supply based on Switching Regulator and Modified Sine Wave

10.11591/ijece.v7i3.pp1161-1170
Anna Nur Nazilah Chamim , Muhammad Heru Gustaman , Nia Maharani Raharja , Iswanto Iswanto
The availability of the electricity in doing a job lead to a dependency on it. If there is a sudden failure on electricity, it will result in unfinished works. To overcome the undesired situation because of wasting time, it is advisable to have your power supply. The power supply can serve to replace electricity temporarily, or it could be as a replacement for power supply of PLN’s (State Electricity Company) electricity nets to meet the daily electricity needs. Backup power available can sufficiently replace the source of PLN’s electricity nets with the output of square wave to the ordinary electricity needs. The type of the intended power supply is inverter system as a backup system that supplies daily electricity. In this case, it aims to change the DC (direct current) to AC (alternating current) voltages.
Volume: 7
Issue: 3
Page: 1161-1170
Publish at: 2017-06-01

Designing of Dynamic Re-clustering Leach Protocol for Calculating Total Residual Time and Performance

10.11591/ijece.v7i3.pp1286-1292
Syed Umar , Yerragudipadu Subbarayudu , K. Kiran Kumar , N. Bashwanth
Wireless sensor networks (WSN), a plurality of sensors in an energy limited deliveries. the sensors are arranged randomly for many applications. Thus, the battery Or download a replacement would be practical. Therefore, the energy efficient routing protocol to expand the network. In this article we propose a new cluster based Re-Leach dynamic Protocol Dynamic Reclustering based Leach protocol (DR-Leach), the expansion of the lattice energy consumption and reduce the age. The idea is that the energy cluster leaders  next production cluster to balance In each round, the same number of nodes in the network of life. Make your first calculation It calculates the optimum amount of CHS in each round, and the optimum amount for each cluster. The results showed that the improvement of reliability protocols proposed frame and the total energy consumption than BCDCP Leach and protocols.
Volume: 7
Issue: 3
Page: 1286-1292
Publish at: 2017-06-01

Efficient Approach to LVRT Capability of DFIG-Based Wind Turbines under Symmetrical and Asymmetrical Voltage Dips Using Dynamic Voltage Restorer

10.11591/ijpeds.v8.i2.pp945-956
Kiarash Azizi , Murtaza Farsadi , Mohammad Farhadi Kangarlu
The capability of low-voltage ride-through (LVRT) of doubly fed induction generator (DFIG) has been considered as an essence for grid code requirements. Any unbalance on the grid side causes the rotor current of the generator to rise which leads to saturate the dc-link of the back-to-back converter or even destroy it. To meet this requirement, a dynamic voltage restorer (DVR) without dc-link energy storage elements is utilized to compensate any disturbance imposed to the DFIG wind turbine system. On the time of any disturbance or fault, DFIG and DVR are properly controlled in order to compensate the specified faulty phase uninterruptedly. DVR is connected in series to the grid and by injecting instantaneous compensating voltage, prevents the stator voltage from rapid changing; consequently, the rotor side converter can accomplish its normal operation. As voltage dips are the most common grid faults subjected to DFIGs, this paper investigates both symmetrical and asymmetrical voltage dips caused by grid faults. The independent and instantaneous phase voltage compensation, less volume, weight, and cost are the merits to utilize the proposed DVR along with DFIG wind turbines. PSCAD/EMTDC based simulations verifies the capabilities of the proposed technique for the LVRT capability of DFIG.
Volume: 8
Issue: 2
Page: 945-956
Publish at: 2017-06-01
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