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27,404 Article Results

Optimal Placement of Phasor Measurement Unit for Better Power System Observability

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/1466
K. Deebiga , A. Raqib Hussain
Secure and reliable opertation of the grid requires real time monitoring and control of entire power system. Phasor measurement units (PMU) are being deployed for real time monitoring and analysis of power system. The most important factor to be considered in placement problem is observability of power system with minimum number of PMUs. This paper proposed an Integer Linear Programming (ILP) based optimization approach to minimize the number of PMUs in the network. The proposed work determines the number of PMUs and its placement, while maximizing the system observability in normal operating condition. In this paper modeling of zero-injection bus has been formulated to reduce the number of PMUs further. Simulations are carried out in Standard IEEE 14 and IEEE 30 bus system, the results indicate the ILP approach determines the minimum number of PMUs and improves Observabiltity of the Power System. DOI:  http://dx.doi.org/10.11591/telkomnika.v14i2.7605 
Volume: 14
Issue: 2
Page: 199-204
Publish at: 2015-05-01

Temperature Control of Liquid Filled Tank System Using Advance State Feedback Controller

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/1476
Kunal Chakraborty , Sankha Subhra Ghosh , Rahul Dev Basak , Indranil Roy
In this paper modeling of a temperature measuring tank system has been done and then a Advance state Feedback Controller have been used for controlling the step responses of the system. The proposed system extends to a three tank system and each tank has same amount of liquid. The results of computer simulation for the system with Advance state Feedback is shown. DOI: http://dx.doi.org/10.11591/telkomnika.v14i2.7644
Volume: 14
Issue: 2
Page: 288-292
Publish at: 2015-05-01

Rotor Position Sensorless Control of BLDC Motor based on Back Emf Detection Method

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/1469
M. Murugan , R. Jayabharath , C. Gurunathan
In this paper an improved back emf detection method is proposed. The motor neutral voltage is elemenated and the phase back emf zero crossing point can be directly extracted by detecting voltage difference between the phase terminal and the midpoint of the dc link. Here filtering circuit is not needed and the BLDC motor is provided with PWM control of 100% duty ratio which is presented in this paper. To perform the inverter commutation, there is a need of six commutation signals which is obtained by sensing only one of the three phase terminals that reduces the cost of the sensing circuit. The reduction of the imbalance in the six commutation signals which are caused by the asymmetrical behavior of the three phase windings in BLDC motor had been reduced in a varied speed range. It simplifies the starting procedure and achieve the motor performance over a wide speed range. This proposed method is analyzed through the simulation results using MATLAB Simulink. DOI: http://dx.doi.org/10.11591/telkomnika.v14i2.7423
Volume: 14
Issue: 2
Page: 222-227
Publish at: 2015-05-01

Data and Metadata Exchange Design with SDMX Format using Web Service for Interoperability Statistical Data

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/1485
Jaka Sembiring , Ana Uluwiyah
Today’s concept of Open Government Data (OGD) for openness, transparency and ease of access of data owned by government agencies becomes increasingly important. This initiative emerges from the demand of data users for the data belongs to the government agencies. The data services providing an easy access, cheap, fast, and interoperability are needed by the users and becomes important indicator performance for respective government agencies. Statistical Data and Metadata Exchange (SDMX) is a new standard format in the data dissemination activities particularly in the exchange of statistical data and metadata via Internet. In this respect SDMX support the implementation of OGD project. This paper is on the technical design, development and implementation of data and metadata exchange service of statistical data using SDMX format to support interoperability data through web services. Three results are proposed: (i) framework for standardization of structure of statistical publications data model with SDMX; (ii) design architecture of data sharing model; and (iii) web service implementation of data and metadata exchange service using Service Oriented Analysis and Design (SOAD) method. Implementation at Statistics Indonesia (BPS) is chosen as a case study to prove the design concept. It is shown through quantitative assessment and black box testing that the design achieves its objective. DOI: http://dx.doi.org/10.11591/telkomnika.v14i2.7505
Volume: 14
Issue: 2
Page: 343-352
Publish at: 2015-05-01

Building Integrated Photovoltaic Market trend and its Applications

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/1464
M Tripathy , P K Sadhu
The development of BIPV technology and their implementation in construction of building envelop provides an aesthetical, economical and technical solution. This paper presents the building envelope products, and their properties. BIPV products for pitched roof, flat and curved roof, transparent and semi-transparent facades and skylights have been highlighted in the paper. The properties of BIPV products include solar cell efficiency, open circuit voltage, and short circuit current, maximum power and fill factor. Few successful worldwide existing BIPV Projects with different product categories are also listed in a tabular form. The major considerations for a successful project are proper orientation of BIPV module, suitable distance between buildings, avoidance shadow effects and suitable architectural considerations BIPV technology is a sustainable and cost effective method and the future of this technology is promising as it creates zero energy and zero emission buildings. DOI: http://dx.doi.org/10.11591/telkomnika.v14i2.7338 
Volume: 14
Issue: 2
Page: 185-190
Publish at: 2015-05-01

The Feasibility Study of Using Space Vector Modulation Inverters in Two-Level of Integrated Photovoltaic System

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/1467
Mahmoud Zadehbagheri , Amin Payedar
In this paper a system of integrated photovoltaic converter with vector switching control inverter with the modulation method of spatial two-level has been presented. The structure of the system is presented with the proposed and the structure of the invertors’ voltage source has been reviewed. Space vector modulation control method of two-level in a voltage source inverter and then provide proposed system analysis and keying modes are analyzed and the system designing and with the simulation of MATLAB software and standards of the total harmonic distortion for a few modulation methods for comparison, and evaluation has been proposed. The system has been analyzed in terms of economic. A prototype for assessing and comparing with power of 360w in the output with DC link voltage is 400 V and the module voltage is 46.5v has an efficiency of 97.9% in its output that improved than SPWM of 1.6% and to the PWM of 2.7% and Has been simulated with MATLAB software and compared to with a few examples of the control systems of the sinusoidal pulse width modulation and pulse width modulation. Speed and Switching and performance of the system have been analyzed and methods to reduce switching losses and increase of the system efficiency in the practical examples are proposed. DOI: http://dx.doi.org/10.11591/telkomnika.v14i2.7414
Volume: 14
Issue: 2
Page: 205-214
Publish at: 2015-05-01

Estimation of Load Torque and Rotor Speed in Single-Phase Induction Motor Using EKF

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/1471
Ali Monadi , Mohammad Jannati , Tole Sutikno , Nik Rumzi Nik Idris
This paper presents a novel method for estimation of load torque and rotor speed in single-phase Induction Motor (IM) with two asymmetrical windings by using Extended Kalman Filter (EKF). Normally, for estimation of load torque and rotor speed in IM, six state variables namely stator currents, rotor fluxes, rotor speed and load torque, are considered. This paper shows by considering five state variables, estimation of these parameters is possible. Simulation results show the good performance of the presented method. DOI: http://dx.doi.org/10.11591/telkomnika.v14i2.7592
Volume: 14
Issue: 2
Page: 241-249
Publish at: 2015-05-01

The Knowledge Management System of a State Loss Settlement

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/1484
Amalia Rahmawati , Irman Hermadi , Rein Suadamara
The knowledge management is a model involving the information system in the knowledge processing. Tim Penyelesaian Kerugian Negara (TPKN) is one of sources of information related to the state loss settlement, so it needs the development of knowledge management system on the state loss settlement to ease the users when looking for the references of knowledge as completely as possible, accurately, and quickly. This research aims to develop the system of knowledge management on the state loss in LAPAN (SIMAPKLA). The used research methodology is Knowledge Management System Life Cycle (KMSLC). The tacit, explicit knowledge is taken from the experts and it is stored in the Knowledge Base (KB). The design model uses the approach with the orientation of object and implementation with Yii Framework and blackbox testing. The menu on this system includes home, about us, dictionary, news, meeting schedulles, knowledge about state loss, e-document, progress, and forum. Based on a series of tests, in the aspect of functionality, this system is suitable and useful to share knowledge and know the development of state loss settlement. DOI:  http://dx.doi.org/10.11591/telkomnika.v14i2.7388 
Volume: 14
Issue: 2
Page: 335-342
Publish at: 2015-05-01

U-slot Circular Patch Antenna for WLAN Application

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/1482
Arshad Wahab , Jiadong Xu
A dual-frequency microstrip patch antennas has been presented and used for 802.11WLAN applications. The antennas had been designed, simulated and parametrically studied in CST Microwave studio. By introducing u-slot, dual-band operation with its operating mode centered at frequency 2.4GHz, 3.65GHz and 5.2GHz had been obtained. The gain and directivity had been improved by adjusting the parameters of the antennas. The gain of the proposed designs was 6.019dBi, 4.04dBi and 6.22dBi and directivity was 6.02dBi, 4.05dBi and 6.22dBi at resonant frequencies 2.4GHz, 3.6GHz and 5.2GHz respectively. The patch antennas had been proposed to be used in portable devices that require miniaturized constituent parts. DOI: http://dx.doi.org/10.11591/telkomnika.v14i2.7479 
Volume: 14
Issue: 2
Page: 323-328
Publish at: 2015-05-01

Robot Three Dimensional Space Path-planning Applying the Improved Ant Colony Optimization

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/1479
Ming Zhao , Dai Yong
To make robot avoid obstacles in 3D space, the Pheromone of Ant Colony Optimization（ACO）in Fuzzy Control Updating is put forward，the Pheromone Updating value varies with The number of iterations and the path-planning length by each ant . the improved Transition Probability Function is also proposed，which makes more sense for each ant choosing next feasible point .This paper firstly, describes the Robot Workspace Modeling and its path-planning basic method, which is followed by introducing the improved designing of the Transition Probability Function and the method of Pheromone Fuzzy Control Updating of ACO in detail. At the same time， the comparison of optimization between the pre-improved ACO and the improved ACO is made . The simulation result verifies that the improved ACO is feasible and available. DOI: http://dx.doi.org/10.11591/telkomnika.v14i2.7723 
Volume: 14
Issue: 2
Page: 304-310
Publish at: 2015-05-01

Thermal Behavior of an Integrated Square Spiral Micro Coil

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/1472
Y. Benhadda , A. Hamid , T. Lebey , A. Allaoui , M. Derkaoui , R. Melati
We present in this paper a study on the thermal behavior of a square micro coil that will be integrated in a DC-DC micro converter. The first, we calculate the value of inductance. The second, we descript our micro coil; dimensioning, electrical model, and formula of loss. A buck micro converter schematic simulation coupled with ideal and integrated micro coil was presented. This conceptual model of the buck is best understood in terms of the relation between current and voltage of the inductor. Finely, we determinate a mathematical expression giving the evolution of temperatures in an integrated micro coil using the separation of variables method and a visualization of the thermal behavior is determined in 2D and 3D space dimension using the finite element method. DOI: http://dx.doi.org/10.11591/telkomnika.v14i2.7361
Volume: 14
Issue: 2
Page: 250-265
Publish at: 2015-05-01

Active Infrared Night Vision System of Agricultural Vehicles

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/1480
Haijun Yue , Haisheng Xin
Active infrared night vision system was significant for night driving and it has been greatly used on limousine car. Design active infrared night vision system for agricultural vehicles greatly improved the night vision of them and it was an inevitable trend. Comparing parameters of various night vision systems and designing active infrared night vision system of agricultural vehicles was significant for improving active security of agricultural vehicles working at nighttime. By analyzing the infrared night vision system basic parameters determined the structure form and basic parameters, calculated the infrared light wave width and emission power to choose each components, designed active infrared night vision system’s structure and determined parameters of agricultural vehicles. DOI:  http://dx.doi.org/10.11591/telkomnika.v14i2.7513 
Volume: 14
Issue: 2
Page: 311-317
Publish at: 2015-05-01

The Detection of straight and Slant Wood Fiber Through slop angle fiber feature

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/1481
Ratri Dwi Atmaja , Erwin Susanto , Junartho Halomoan , Gurnita Koncara Indraloka , Muhammad Ary Murti
Quality control is one of important process that can not be avoided in industry. Image processing technique is required to distinguish the quality of wood. If it can be done automatically by the computer, it will be very helpful. This paper discusses the detection of straight and slant wood fiber to distinguish it’s quality. This paper propose an algorithm by using only two features i.e. mean (average value of slop angle fiber) and maximumangle (the maximum value of slop angle fiber). Then the classification method is used by tresholding. The result shows the performance is achieved on accuracy 79.2%. DOI: http://dx.doi.org/10.11591/telkomnika.v14i2.7725
Volume: 14
Issue: 2
Page: 318-322
Publish at: 2015-05-01

Electrical Properties of Indium doped Alumina (Al2O3) Thin Films

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/1473
Hadaate Ullah , Shahin Mahmud
To know the electrical properties of any materials is very important for practical application of that material. In this paper I have tried to find out the proper electrical properties of Indium doped Alumina (Al2O3) for practical application of this Alumina. For this purpose all thin films are deposited on glass substrate by electron beam evaporation technique at a pressure of about 1.5 x 10-6 torr and at temperature of 307K. The thickness of Indium doped Al2O3 films (25%w, 30%w and 40% w of In2O3) range from 68 nm to 183 nm. For 25% In2O3 doped alumina the conductivity at room temperature is 24.10mho/cm, for 30% In2O3 doped alumina this value is 82.99mho/cm and for 40% In2O3 doped alumina this is 129.10mho/cm. The resistivity and sheet resistance decrease with the increase of doping concentration that means the conductivity increases with doping concentration. DOI: http://dx.doi.org/10.11591/telkomnika.v14i2.7747 
Volume: 14
Issue: 2
Page: 266-269
Publish at: 2015-05-01

A Minimax Polynomial Approximation Objective Function Approach for Optimal Design of Power System Stabilizer by Embedding Particle Swarm Optimization

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/1465
Bhanu Pratap Soni , Akash Saxena , Vikas Gupta
The paper presents a novel approach based on Minimax approximation and evolutionary tool Particle Swarm Optimization (PSO) to fabricate the parameters of Power System Stabilizers (PSSs) for multi machine power systems. The proposed approach employs PSO algorithm for find the setting of PSS parameters. The worth mentioning feature of this work is the formulation of objective function with the help of swing curves interpolation. A novel transformation known as minimax approximation is used for converting the objective into the polynomials of degree one, two and three. To construct the objective function based on interpolation second order sensitivity analysis is performed. The performance of the PSSs is tested under different topological changes, operating conditions and system configurations. Nonlinear simulation reveals that proposed PSSs are effectively deal with local and interarea modes of oscillations. PSS design obtained through lower order polynomial expression of objective function is able to deal with the oscillatory modes efficiently. DOI: http://dx.doi.org/10.11591/telkomnika.v14i2.7602
Volume: 14
Issue: 2
Page: 191-198
Publish at: 2015-05-01
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