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27,404 Article Results

High Performance Control of Grid Connected Cascaded H-Bridge Active Rectifier Based on Type II-Fuzzy Logic Controller with Low Frequency Modulation Technique

10.11591/ijece.v6i2.pp484-494
M. Dabbaghjamanesh , A. Moeini , M. Ashkaboosi , P. Khazaei , K. Mirzapalangi
This paper tries to employ a fuzzy logic (FL) controller type II to control the Cascaded H-Bridge (CHB) active rectifier. This controller has strong performance, specially, when a low switching frequency Selective Harmonic Elimination (SHE) method is used. In order to regulate all of the DC link voltages, the optimum voltage balancing strategy in the low frequency modulation technique is used in the proposed method. Finally, the performance and effectiveness of the proposed method is validated in MATLAB environment.   All the simulation and result has been simulated by MATLAB software.
Volume: 6
Issue: 2
Page: 484-494
Publish at: 2016-04-01

An Effective Development and Analysis of a Mobile Robot

10.11591/ijece.v6i2.pp654-665
Jagannath Sahu , B.B. Choudhury , M.R. Patra
This paper deals with the design of a battery operated Mobile Robot and development of various modes of its control. The Mobile Robot can be operated in three different modes, namely Dual Tone Multi Frequency (DTMF), Radio Frequency (RF) and ZigBee thereby enabling a multi- dimensional control system. The Mobile Robot is a single seated carrier. It can also be used to transport substantial amount of physical load for short distances. It is a prototype of a multi-use robot having a wide range of applicability according to the requirement after suitable modifications. Thus it can be easily applied inside a hospital to carry patients, as a wheel chair for physically challenged people, to carry goods in large shopping malls, as golf cars, can also be used for industrial purposes with adequate modifications. It can also be used as cleaning machine at railway stations, airports, museums, large halls. It uses a DC power source and not any conventional energy sources. Hence it is ecofriendly and this Mobile Robot can be termed as an advancing step in the field of battery operated vehicles.
Volume: 6
Issue: 2
Page: 654-665
Publish at: 2016-04-01

An Extender Kalman Filter-based Induction Machines Faults Detection

10.11591/ijece.v6i2.pp535-548
Abdelghani Chahmi , Mokhtar Bendjebbar , Bertrand Raison , Mohamed Benbouzid
This paper deals with the detection and localization of electrical drives faults, especially those containing induction machines. First, the context of the study is presented and an Extended Kalman Filter is described for induction machines fault detection. Then the modeling procedure under faulty conditions is shown, and the machine diagnosis methods are developed. The proposed diagnosis approach requires only little experimental data, and more importantly it provides efficient simulation tools that allow characterizing faulty behavior.Fault detection uses signal processing techniques in known operating phases (fixed speed), considering and locating malfunctions.
Volume: 6
Issue: 2
Page: 535-548
Publish at: 2016-04-01

Novel ROADM modelling with WSS and OBS to Improve Routing Performance in Optical Network

10.11591/ijece.v6i2.pp700-707
Kavitha G.R G.R. , Indumathi T.S.
The area of optical network is on constant point of focus among the research communities owing to potential advantage of long distance communication as well as the routing issues associated with it. Majority of the implemented techniques calls for using expensive hardware or adopting narrowed technical assumptions, for which reason the routing performance couldn’t be optimized to a large extent. The present manuscript proposes a novel technique called as Optimized Routing for Peak Traffic under the scenario of uncertainties in the existing traffic scenario. The proposed solution presents some potential principle that is incorporated in the ROADM design for enhancing the capabilities of the proposed system.  The system is evaluated under multiple scenarios of analysis using blocking probabilities, OSNR, bit error rate, iteration etc. The outcome of the proposed system is compared with the one of the existing significant study to benchmark it.
Volume: 6
Issue: 2
Page: 700-707
Publish at: 2016-04-01

Partial Discharge Characterization based on Leakage Current Pulses Waveform for Contaminated Glass Insulator String

10.11591/ijece.v6i2.pp835-843
N. A. Othman , M. A. M. Piah , Z. Adzis , Nasir A. Al-geelani
This paper deals with the analysis of partial discharge (PD) occurrences based on leakage current (LC) pulses distribution under different level of contamination. In this work, laboratory based contamination performance tests are conducted on four units of glass insulator string stacked in I-position. Results show that PD can be characterized (according to their occurrence with respect to the AC supply) as follows: corona discharge occurring dominantly in lightly contaminated insulators, surface discharge occurring dominantly in medium contaminated insulators and finally internal discharge occurring dominantly in heavily contaminated insulators. The ability to distinguish the type of PDs from the LC waveform could be used to monitor and predict the condition of the insulator. The outcome can be incorporated in a conditioning monitoring system.
Volume: 6
Issue: 2
Page: 835-843
Publish at: 2016-04-01

Frequency and Time Response of Power Plant Grounding System Exposed to Lightning Strike

10.11591/ijece.v6i2.pp512-525
Srete N Nikolovski , Zoran Baus , Goran Knežević
This paper examines the frequency response of power plant grounding system exposed to the lightning current. Large amount of current generated by the stroke flow in the grounding system of power plant and dissipate in the soil.  The electric and magnetic field generated by such high voltages and currents may cause damage of equipment and may be dangerous for the personnel in power plant.  For the every given frequency obtained using Fast Fourier Transformation (FFT) of lightning current impulse, electromagnetic field theory approach is used to solve Maxell’s equation and compute scalar potential, electric and magnetic field. Also, the influence of the point in which lightning current is diffused in the grounding system is presented. Three dimensional plots of spatial distribution of scalar potential, electric and magnetic field are presented. The time domain response of scalar potential, electric and magnetic field on one profile is also presented.
Volume: 6
Issue: 2
Page: 512-525
Publish at: 2016-04-01

Information Retrieval: Textual Indexing Using an Oriented Object Database

10.11591/ijeecs.v2.i1.pp205-214
Mohammed Erritali
The growth in the volume of text data such as books and articles in libraries for centuries has imposed to establish effective mechanisms to locate them. Early techniques such as abstraction, indexing and the use of classification categories have marked the birth of a new field of research called "Information Retrieval". Information Retrieval (IR) can be defined as the task of defining models and systems whose purpose is to facilitate access to a set of documents in electronic form (corpus) to allow a user to find the relevant ones for him, that is to say, the contents which matches with the information needs of the user.  Most of the models of information retrieval use a specific data structure to index a corpus which is called "inverted file" or "reverse index". This inverted file collects information on all terms over the corpus documents specifying the identifiers of documents that contain the term in question, the frequency of each term in the documents of the corpus, the positions of the occurrences of the word. In this paper we use an oriented object database (db4o) instead of the inverted file, that is to say, instead to search a term in the inverted file, we will search it in the db4o database. The purpose of this work is to make a comparative study to see if the oriented object databases may be competing for the inverse index in terms of access speed and resource consumption using a large volume of data.
Volume: 2
Issue: 1
Page: 205-214
Publish at: 2016-04-01

Energy Efficiency in Cognitive Radio Network: Green Technology Towards Next Generation Networks

10.11591/ijict.v5i1.pp45-50
Seetaiah Kilaru , Adithya gali
Energy efficiency of mobile network is always a challenging task. From the past decade, it is observable that the users who are using multimedia services are increasing in rapid way. These multimedia applications require higher data rates. High data rates will consume more energy of mobile network, which results poor energy efficiency. To meet higher data rates and to achieve energy efficiency, Cognitive Mobile Network with small cell model was explained in this paper. Dynamics of the power grid also have significant impact on mobile networks, hence smart grid implementation was proposed instead of traditional power grid. Most of the existed studies on cognitive mobile network focussed on spectrum sensing only. This paper focussed on cognitive radio network implementation by considering spectrum sensing and smart grid environment. An iterative algorithm was proposed to attain equillibrium condition to the problem. Interference management and energy efficient power allocation were achieved with the introduction of smart grid. Simulation results proved that optimum power allocation and energy efficiency are possible with the introduction of smart grid in cognitive network.
Volume: 5
Issue: 1
Page: 45-50
Publish at: 2016-04-01

Improved Performance of Four Switch Three Phase with SEPIC-Based Inverter

10.11591/ijeecs.v2.i1.pp96-106
Prabu B , Murugan M
The proposed novel four-switch three-phase (FSTP) inverter is to design to reduce the rate, difficulty, mass, and switching losses of the DC-AC conversion system. Here the output line voltage cannot exceed half the input voltage in the out-dated FSTP inverter and it operates at half the DC input voltage. Single-Ended Primary-Inductance Converter (SEPIC) is a novel design for the FSTP inverter proposed in this paper. In this proposed topology the necessity of output filters is not necessary for the pure sinusoidal output voltage. Related to out-dated FSTP inverter, the proposed FSTP SEPIC inverter raises the voltage utilization aspect of the input DC supply, where the suggested topology delivers the higher output line voltage which can be extended up to the full value of the DC input voltage. In the proposed topology a control used called the integral sliding-mode (ISM) control and this control is used to enhance its dynamics and to ensure strength of the system during different operating conditions. Simulation model and results are used to authorise the proposed concept and simulations results show the effectiveness of the proposed inverter.
Volume: 2
Issue: 1
Page: 96-106
Publish at: 2016-04-01

The Influence of Moisture and Temperature on the Behavior of Soil Resistivity in Earthing Design Using Finite Element Method

10.11591/ijeecs.v2.i1.pp11-22
Sajad Samadinasab , Farhad Namdari , Mohammad Bakhshipor
Protection of equipment, safety of persons and continuity of power supply are the main objectives of the grounding system. For its accurate design, it is essential to determine the potential distribution on the earth surface and the equivalent resistance of the system. The knowledge of such parameters allows checking the security offered by the grounding system when there is a failure in the power systems.A new method to design an earthing systems using Finite Element Method (FEM) is presented in this article.In this approach, the influence of the moisture and temperature on the behavior of soil resistivity are considered in EARTHING system DESIGN. The earthing system is considered to be a rod electrode and a plate type electrode buried vertically in the ground.The resistance of the system which is a very important factor in the design process is calculated using Finite Element Method. Finite Element Method is used to estimate the solution of the partial differential equation that governs the system behavior. COMSOL Multiphysics 4.4 which is one of the packages that work with the FEM is used as a tool in this design.Finally the values of the resistance obtained by COMSOL Multiphysics are compared with the proven analytical formula values for the ground resistance, in order to prove the work done with COMSOL Multiphysics.
Volume: 2
Issue: 1
Page: 11-22
Publish at: 2016-04-01

Optimal Siting and Sizing of Solar Power Sources in Interconnection Grid System

10.11591/ijape.v5.i1.pp1-13
S Yogendra Reddy , Daka Seshi Reddy , G. Kesava Rao
Growing concerns electrical power demand in need and necessity of daily livelihood of life. Impacted over addition power demanded there is climate impacts, environmental conditions due to conventional power generation resulted in improvement of cheaper solar power generation in the whole distribution system network, and programs offered by governments have contributed to an increment in the number of distributed energy resources (DERs) system in commercial and domestic electrical power output. It is well known that fact the non-optimal size and non-optimal siting system may lead to high power losses, bad voltage profiles and high losses of profit margins of DISCOM’s end. Therefore, this paper to determine the location best siting and filler of multiple DERs generators supported power loss, generation units, and cheaper power transfer demonstrated through IEEE 30 bus standard test system with help of Power World Simulator Package and single line drawing of 2MW solar PV power plant added to APDISCOM.
Volume: 5
Issue: 1
Page: 1-13
Publish at: 2016-04-01

Sparse Modeling with Applications to Speech Processing: A Survey

10.11591/ijeecs.v2.i1.pp161-167
Ahmed Omara , Alaa Hefnawy , Abdelhalim Zekry
Nowadays, there has been a growing interest in the study of sparse approximation of signals. Using an over-complete dictionary consisting of prototype signals or atoms, signals are described by sparse linear combinations of these atoms. Applications that use sparse representation are many and include compression, source separation, enhancement, and regularization in inverse problems, feature extraction, and more. This article introduces a literature review of sparse coding applications in the field of speech processing.
Volume: 2
Issue: 1
Page: 161-167
Publish at: 2016-04-01

Transient Stability Improvement Using UPFC-SMES in A Multi Machine Power System

10.11591/ijape.v5.i1.pp14-21
Kantilal Dayalal Joshi , Vinod Chandrakar
Unified Power Flow Controller (UPFC) is a Voltage sourced converter based Flexible A.C.Transmission  (FACTS) controller which has a capability of simultaneously or selectively controlling all the parameters affecting transmission of power.  With emphasis on harnessing renewable energy many energy storage technologies are being used. Superconducting magnetic energy storage (SMES) stores energy in magnetic form by means of a D.C. current circulating in a superconducting coil. To exchange power with SMES a power electronic interface is required. Feasibility of interfacing SMES to D.C. link of UPFC has been explored in this paper. A multimachine system with a long transmission line is compensated by UPFC-SMES .A DC-DC chopper modulates power of SMES so as to improve the transient stability of system. Complete simulation has been done using MATLAB/Simulink which shows improvement of first peak, damping of oscillations & improvement in critical clearing time.
Volume: 5
Issue: 1
Page: 14-21
Publish at: 2016-04-01

Automatic Voltage Generation Control for Two Area Power System Based on Particle Swarm Optimization

10.11591/ijeecs.v2.i1.pp132-144
Ali M. Ali , M.A. Ebrahim , M.A. Moustafa Hassan
This article presentes a PID controller for two area power system equipped with both automatic generation control and automatic voltage regulator loops. The research has been done to control two area power systems with PSO optimized self-tuning PID controller. The comparison between different controllers and the suggested PSO based controller illustrates that the proposed controller can generate the best dynamic response for a step load change. For this purpose, MATLAB-Simulink software is used. The obtained results are promising.
Volume: 2
Issue: 1
Page: 132-144
Publish at: 2016-04-01

Impact of Shunt FACTS Devices on Security Constrained Unit Commitment

10.11591/ijape.v5.i1.pp22-39
G. A. M. Hosaini Hajivar , S. S. Mortazavi
Shunt FACTS Devices (SFD) would play an important role in maintaining security and reduce total generation cost in the economical operation of power systems. The application of this device to the AC model of securityconstrained unit commitment (SCUC) for the day ahead scheduling is presented in this paper. The proposed AC model of SCUC with SFD would include active and reactive power flow constraints which increase the network controllability at normal operation and contingency. A general SFD model is introduced for the reactive power management in SCUC which is based on the reactive power injection model (RPIM). The case studies demonstrate the effectiveness of the SFD application to SCUC with AC network constraints. Meanwhile simulation results demonstrate the combined use of these devices to SCUC have a significant impact on maintaining network security, preventing load shedding, lower total generation cost and increase using the maximum capacity of the existing transmission network.
Volume: 5
Issue: 1
Page: 22-39
Publish at: 2016-04-01
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