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28,188 Article Results

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

Enhanced Position Control for Pneumatic System by Applying Constraints in MPC Algorithm

10.11591/ijece.v7i3.pp1633-1642
Siti Fatimaah Sulaiman , M.F. Rahmat , A.A.M. Faudzi , Khairuddin Osman , Sy Najib Sy Salim , S.I. Samsudin , A.R. Azira
This paper demonstrates the effectiveness of applying constraints in a controller algorithm as a strategy to enhance the pneumatic actuator system’s positioning performance. The aim of the present study is to reduce the overshoot in the pneumatic actuator positioning system’s response. An autoregressive with exogenous input (ARX) model structure has been used to model the pneumatic system, while a model predictive control (MPC) has been employed as a control strategy. The input constraint has been applied to the control signals (on/off valves signals) to ensure accurate position tracking. Results show that the strategy with constraint effectively reduced overshoot by more than 99.0837 % and 97.0596 % in simulation and real-time experiments, respectively. Moreover, the performance of the proposed strategy in controlling the pneumatic positioning system is considered good enough under various loads. The proposed strategy can be applied in any industry that used pneumatic actuator in their applications, especially in industries that involved with position control such as in manufacturing, automation and robotics. The strategy proved to be capable of controlling the pneumatic system better, especially in the real-time environment.
Volume: 7
Issue: 3
Page: 1633-1642
Publish at: 2017-06-01

Adaptive Sliding Mode Control of PMLSM Drive

10.11591/ijpeds.v8.i2.pp639-646
Maamar Yahiaoui , Abderrahmane Kechich , Ismail Khalil Bouserhane
In this paper, we propose a study by software MATLAB/Simulink of the adaptive nonlinear controller of permanent magnet linear synchronous machine. The lumped uncertainties due for saturation magnetic and temperature and distribution load effects in performances of the system control. To resolve this problem the sliding mode controller is designed with estimator of load force by MRAS method the simulation results prove clearly the robustness of controlling law and estimator method.
Volume: 8
Issue: 2
Page: 639-646
Publish at: 2017-06-01

Analysis, Design and Investigation on a New Single-Phase Switched Quasi Z-Source Inverter for Photovoltaic Application

10.11591/ijpeds.v8.i2.pp853-860
C. Bharatiraja , P. Sanjeevikumar , Aganti Mahes , Ayushi Saxena , K. Padmapriya , B. K. Mithra , AS Swathimala , S. Raghu
This paper addresses the approach to improve the efficiency of the quasi  Z-source inverter. In order to increase the efficiency the reduction of conduction losses is one way to approach. Sequentially to decrease the conduction losses in the quasi z-source inverter the replacement of diode is replacing with switches is proposed which is also called as synchronous rectification. The paper represents basics of the approach, analysis  and comparison of the power losses of the traditional and proposed designs of the grid connected PV-system with quasi z-source inverter system. The proposed approach validated on the computer simulations in the MATLAB environment.
Volume: 8
Issue: 2
Page: 853-860
Publish at: 2017-06-01

Channel Loss Estimation and Test of Ultra-Wideband Propagation from 2 to 10 GHz Application

10.11591/ijeecs.v6.i3.pp663-670
Lei Gao , Qun Chen
This paper deals with the channel loss models of ultra-wideband radio wave propagation from 2 to 10 GHz application. IEEE 802.15.4a and Okumura channel loss reference models have been introduced and the estimation methods of channel transmission loss have been discussed with the environments of 2 to 10 GHz short range application. The channel transmission loss was measured in ZigBee circuit with 2 kinds of power, using IEEE 802.15.4a and Okumura channel model to estimate the theoretical channel loss, the theoretical value and the actual measured value were compared and analyzed. The analysis shows that the error between the calculated value and the actual measured value of the IEEE 802.15.4a reference model is small in the ultra-wideband ZigBee channel environment, and the error of the Okumura channel loss model is large. The results show that in the environments of 2 to 10 GHz short range application, IEEE 802.15.4a channel loss model is a high precision reference model for the ultra-wideband channel loss calculation.
Volume: 6
Issue: 3
Page: 663-670
Publish at: 2017-06-01

Application of PST Source based DC Link Restoration for IDVR

10.11591/ijece.v7i3.pp1103-1111
Ramchandra Nittala , Alivelu Parimi , K Uma Rao
Interline Dynamic Voltage Restorer (IDVR) comprises of several Dynamic Voltage Restorers (DVRs) connected to different distribution feeders in the power system sharing common energy storage. One of the DVR provides for voltage sag compensation appearing in that feeder, while the other DVRs restore the energy in the common dc-link thus dynamically maintaining the voltage of DC link capacitor constant by importing power from the other feeders. Restoration of the DC link energy plays an important role in the capability of the individual DVR in the IDVR to mitigate deep sags with long durations. In this paper the restoration of the DC link energy of the IDVR is achieved by the utilizing the phase shifting transformers (PST) which assist the respective DVR during its power control mode. A controlled switching action is provided to choose the appropriate connection of PST to the feeders depending upon the voltage sag condition. The proposed novel concept is examined in a test power system with IDVR.
Volume: 7
Issue: 3
Page: 1103-1111
Publish at: 2017-06-01
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