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27,404 Article Results

Influence Of Sensorless Control On The Noise Of Switched Reluctance Motor Drive

10.11591/ijpeds.v6.i3.pp433-438
Alexander Petrushin , Maxim Tchavychalov
The influence of the switched reluctance motor drive sensorless control on the level of its noise is considered. Theoretically justified the increase of noise level while sensorless SRM control. The results of switched reluctance motor noise measurement with sensorless control and control using the physical position sensor are given.
Volume: 6
Issue: 3
Page: 433-438
Publish at: 2015-09-01

Toward an Effective Combination of multiple Visual Features for Semantic Image Annotation

10.11591/ijeecs.v15.i3.pp533-543
B. Minaoui , M. Oujaoura , M. Fakir , M. Sajieddine
In this paper we study the problem of combining low-level visual features for semantic image annotation. The problem is tackled with a two different approaches that combines texture, color and shape features via a Bayesian network classifier. In first approach, vector concatenation has been applied to combine the three low-level visual features. All three descriptors are normalized and merged into a unique vector used with single classifier. In the second approach, the three types of visual features are combined in parallel scheme via three classifiers. Each type of descriptors is used separately with single classifier. The experimental results show that the semantic image annotation accuracy is higher when the second approach is used.
Volume: 15
Issue: 3
Page: 533-543
Publish at: 2015-09-01

Experimental Study of the Boost Converter under Current Mode Control

10.11591/ijpeds.v6.i3.pp586-593
Djamal Gozim , Kamel Guesmi , Djilali Mahi
This paper presents the practical analysis of Boost converter operating in continuous conduction mode under current control. We start by theconverter modeling, then experimental results will be exposed where we propose an experimental circuit, to study the influence of the variation of different circuit parameters such as reference current, input voltage and load. We also analyze the control technique performances. The experimental results are given and interpreted in each case.
Volume: 6
Issue: 3
Page: 586-593
Publish at: 2015-09-01

Energy Efficient Clustering for Wireless Sensor Networks using EASSR

10.11591/ijeecs.v15.i3.pp554-568
Y. Chalapathi Rao , Ch. Santhi Rani
Wireless Sensor Networks (WSNs) consist of a large quantity of small and low cost sensor nodes powered by small non rechargeable batteries and furnish with various sensing devices. The cluster-based technique is one of the good perspectives to reduce energy consumption in WSNs. The lifetime of WSNs is maximized by using the uniform cluster location and balancing the network loading between the clusters. We have reviewed various energy efficient schemes apply in WSNs of which we concerted on clustering approach. So, in this paper we have discussed about few existing energy efficient clustering techniques and proposed an Energy Aware Sleep Scheduling Routing (EASSR) scheme for WSN in which some nodes are usually put to sleep to conserve energy, and this helps to prolong the network lifetime. EASSR selects a node as a cluster head if its residual energy is more than system average energy and have low energy consumption rate in existing round. The efforts of this scheme are, increase of network stability period, and minimize loss of sensed data. Performance analysis and compared statistic results show that EASSR has significant improvement over existing methods in terms of energy consumption, network lifetime and data units gathered at BS.
Volume: 15
Issue: 3
Page: 554-568
Publish at: 2015-09-01

Numerical Method for Power Losses Minimization of Vector-Controlled Induction Motor

10.11591/ijpeds.v6.i3.pp486-497
Alex Borisevich
The paper devoted to energy efficiency maximizing problem of the induction motor under part-load conditions. The problem is formulated as the minimization of ohmic losses power as a function from flux-producing current in field-oriented motor operation. Control input precompensation which transforms the dynamic time-varying optimization problem to stationary one is introduced. Adjustment rule for control variable is proposed which speeds-up the method convergence in comparison with linear variation of input. Finally a new continuous-time search algorithm for solving the problem of minimizing power consumption was given. The statements on method behavior were formulated and convergence to local minimum was proved. The method verified in simulation and in hardware experimental setup.
Volume: 6
Issue: 3
Page: 486-497
Publish at: 2015-09-01

A New DG Allocation Approach Based on Biogeography-Based Optimization with Considering Fuzzy Load Uncertainty

10.11591/ijai.v4.i3.pp89-96
Mohammad Sedaghat , Esmaeel Rokrok , Mohammad Bakhshipour
A new distributed generation placement method based on biogeography-based optimization (BBO) is investigated in this paper. A significant novelty of this study lies in considering fuzzy load uncertainty. For this purpose a fuzzy backward- forward sweep load flow is proposed. The main objectives of this study is minimizing power losses and improving voltage profile. A comparative study between optimal location and sizing under typical load condition and fuzzy load uncertainty is presented. To verify the efficiency of proposed BBO method, it is conducted on IEEE 33 bus distribution system, also a comparative study between proposed BBO approach and particle swarm optimization (PSO), Technical-learning based optimization (TLBO), Artificial bee colony (ABC), Imperialist competitive algorithm (ICA) is investigated. The simulation results show the excellent and superior performance of proposed BBO approach in comparison with the other intelligent methods.
Volume: 4
Issue: 3
Page: 89-96
Publish at: 2015-09-01

New Hybrid Structure Based on Improved Switched Inductor Z-Source and Parallel Inverters for Renewable Energy Systems

10.11591/ijpeds.v6.i3.pp636-647
Ali Zakerian , Daryoosh Nazarpour
Nowadays, more and more distributed generations and renewable energy sources, such as wind, solar and tidal power, are connected to the public grid by the means of power inverters. They often form microgrids before being connected to the public grid. Due to the availability of high current power electronic devices, it is inevitable to use several inverters in parallel for high-power and/or low-cost applications. So, inverters should be connected in parallel to provide system redundancy and high reliability, which are important for critical customers. In this paper, the modeling, designing and stability analysis of parallel-connected three-phase inverters are derived for application in renewable energy systems. To enlarge voltage adjustability, the proposed inverter employs an improved switched inductor Z-source impedance network to couple the main circuit and the power source. Compared with the classical Z-source inverter (ZSI) and switched inductor Z-source inverter (SL-ZSI), the proposed inverter significantly increases the voltage boost inversion ability and also can increase the power capacity and the reliability of inverter systems. The proposed topology and its performances are validated using simulation results which are obtained in Matlab/Simulink.
Volume: 6
Issue: 3
Page: 636-647
Publish at: 2015-09-01

A Fuzzy Controller for Compensation of Voltage SAG/SWELL Problems Using Reduced Rating Dynamic Voltage Restorer

10.11591/ijeecs.v15.i3.pp407-414
Rajesh Damaraju , S.V.N.L. Lalitha
Non linear loads are highly effected by variations in voltages. Dynamic voltage restorer is one of the most popular compensating devices due to its low cost and better performance. Usage of Park’s transformation technique effectively reduces the rating of Dynamic voltage restorer. Application of fuzzy logic controller for getting the better result is proposed in this paper. The results are verified in Matlab/Simulink environment.
Volume: 15
Issue: 3
Page: 407-414
Publish at: 2015-09-01

A Soft Switching Control Strategy Based on Interleaved Boost Converter for BLDC Motor Drive

10.11591/ijpeds.v6.i3.pp516-523
V. Ramesh , Y. Kusuma Latha
In this paper, Zero-Voltage-Transition (ZVT) two-cell interleaved boost Power Factor Correction (PFC) converter for voltage source Inverter (VSI) fed permanent magnet brushless DC motor (PMBLDCM) drive has been proposed Scheme reduce the torque ripple of BLDC motor drive and also reduce the switching losses of VSI for Which an auxiliary circuit is designed and added to the interleaved boost converter.  For achieving soft switching, only one switch is used in auxiliary circuit which reduces the torque ripple and switching losses. In this proposed control strategy, the DC link voltage is controlled with interleaved boost converter which is proportional to the desired speed of the BLDC motor. In this paper, six switch and four switch VSI is also implemented with interleaved boost converter topology. A comparison is made between the six switch and Four Switch VSI fed PMBLDC Motor drive and Torque Analysis as been done. To validate the proposed work, results are presented. The results showed that proposed converter control strategy operating under soft switching mode improves the efficiency of the drive system with PFC feature in wide range of the speed control.
Volume: 6
Issue: 3
Page: 516-523
Publish at: 2015-09-01

Analysis of Modeling of Current Differential Protection

10.11591/ijpeds.v6.i3.pp423-428
Denis B. Solovev , Angelina I. Makeeva
Analysis of transients in longitudinal differential protection schemes is given basing on results obtained by simulation. Simulation diagram for modeling differential protection with current transformers with non-linear cores is proposed. Main shortcomings of using current transformers as measuring transducers are shown. Solutions of the problem revealed are proposed.
Volume: 6
Issue: 3
Page: 423-428
Publish at: 2015-09-01

A Developed Graphical User Interface for Power System Stability and Robustness Studies

10.11591/ijeecs.v15.i3.pp458-467
Ghouraf Djamel Eddine , Naceri Abdellatif , Abid Mohamed , Kabi Wahiba
This paper present the realization and development of a graphical user interface (GUI) to studied the stability and robustness of power systems (analysis and synthesis), using Conventional Power System Stabilizers (CPSS - realized on PID scheme) or advanced controllers (based on adaptive and robust control), and applied on automatic excitation control of powerful synchronous generators, to improve dynamic performances and robustness. The GUI is a useful average to facilitate stability study of power system with the analysis and synthesis of regulators, and resolution of the compromise: results precision / calculation speed. The obtained Simulation results exploiting our developed GUI realized under MATLAB shown considerable improvements in static and dynamic performances, a great stability and enhancing the robustness of power system, with best precision and minimum operating time. This study was performed for different types of powerful synchronous generators.
Volume: 15
Issue: 3
Page: 458-467
Publish at: 2015-09-01

Faults Diagnosis in Five-Level Three-Phase Shunt Active Power Filter

10.11591/ijpeds.v6.i3.pp576-585
L. Benyettou , T. Benslimane , O. Abdelkhalek , T. Abdelkrim , K. Bentata
In this paper, characteristics of open transistor faults in cascaded H-bridge five-level three-phase PWM controlled shunt active power filter are determined. Phase currents can’t be trusted as fault indicator since their waveforms are slightly changed in the presence of open transistor fault. The proposed method uses H bridges output voltages to determine the faulty phase, the faulty bridge and more precisely, the open fault transistor.
Volume: 6
Issue: 3
Page: 576-585
Publish at: 2015-09-01

Digital Implementation of DSVPWM Control for EV fed through Impedance Source Inverter

10.11591/ijpeds.v6.i3.pp477-485
Ananda Kumar Akkarapaka , Dheerendra Sing
In this paper, a new space vector modulation technique is proposed for speedcontrol of Induction Motor using Z-source inverter powered by a low voltage DCsource. The zero states of conventional space vector modulation is used for boosting the DC link voltage to the required level. The proposed SVM techniqueestimates the required shoot through period of the Z-source inverter to maintainthe DClink voltage constant at the desired level through capacitor voltage control.A 32 bit DSP (TMS320F28335) is used to implement the proposed space vectormodulation method. The power structure and the modulation technique is wellsuited for electric vehicle application.
Volume: 6
Issue: 3
Page: 477-485
Publish at: 2015-09-01

3D Objects Retrieval using Geodesic Distance Based on Eikonal equation

10.11591/ijeecs.v15.i3.pp597-604
Driss Naji , M. Fakir , O. Bencharef
Recently, shape-based matching and retrieval of 3D polygonal models has become one of the most fundamental problems in computer vision. Dealing with families of objects instead of a single one may impose further challenges on regular geometric algorithms. In this paper we focus on the classification of 3D objects based on their geodesic distance & path calculated on a mesh using an iterative algorithm for solving the Eikonal equation. For the classification process, we use both Multiclass Support Vector Machine (M-SVM) classifier,K-Nearest Neighbors (KNN), Decision Tree (DT) and Artificial Neural Networks (ANN) to better evaluate our descriptors. We illustrate the potential of extracted characteristics by two 3D benchmarks. The recognition rates achieved in all experiments show that a small number of curve between 9 and 12 can correctly categorize a family of 3D objects.
Volume: 15
Issue: 3
Page: 597-604
Publish at: 2015-09-01

Performance Comparison of PID and Fuzzy Controllers in Distributed MPPT

10.11591/ijpeds.v6.i3.pp625-635
Chandani Sharma , Anamika Jain
With an increase of Green Technology applications, Photovoltaic have emerged as the most appropriate solution for electricity generation purposes. However, due to variable temperature and irradiance, under the partial or shaded conditions Maximum Power Point Tracking is needed to determine highest efficiency of the system. The paper describes dynamic modeling and control of variable temperature and irradiance on solar panel in SIMULINK-MATLAB environment. The implementation of Buck Converter is used for power switching and impedance matching on connecting the panel to the load. The effectiveness of the model, with enhanced efficiency through voltage stabilization, is performed using Proportional-Integral-Derivative and Fuzzy-Logic-Controllers. A comparative study is made for PID and FLC on the basis of outputs to deal with online set point variations. FLC gives closer results to Standard Test Conditions when compared with PID. The Fuzzy system developed, using tested membership functions serve as a platform for sustainable standalone and grid-based applications using distributed MPPT.   With an increase of Green Technology applications, Photovoltaic have emerged as the most appropriate solution for electricity generation purposes. However, due to variable temperature and irradiance, under the partial or shaded conditions Maximum Power Point Tracking is needed to determine highest efficiency of the system. The paper describes dynamic modeling and control of variable temperature and irradiance on solar panel in SIMULINK-MATLAB environment. The implementation of Buck Converter is used for power switching and impedance matching on connecting the panel to the load. The effectiveness of the model, with enhanced efficiency through voltage stabilization, is performed using Proportional-Integral-Derivative and Fuzzy-Logic-Controllers. A comparative study is made for PID and FLC on the basis of outputs to deal with online set point variations. FLC gives closer results to Standard Test Conditions when compared with PID. The Fuzzy system developed, using tested membership functions serve as a platform for sustainable standalone and grid-based applications using distributed MPPT.      
Volume: 6
Issue: 3
Page: 625-635
Publish at: 2015-09-01
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