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27,404 Article Results

Reconfiguration of Distribution Network with Distributed Energy Resources Integration Using PSO Algorithm

10.12928/telkomnika.v13i3.1790
Ramadoni; Universitas Muhammadiyah Yogyakarta Syahputra , Imam; Institut Teknologi Sepuluh Nopember Robandi , Mochamad; Institut Teknologi Sepuluh Nopember Ashari
This paper presents optimal reconfiguration of radial distribution network with integration of distributed energy resources (DER) using improved particle swarm optimization (PSO) algorithm. The benefits of DER integration in distribution system are reducing power losses, improving voltage profiles and load factors, eliminating system upgrades, and reducing environmental impacts. However, the presence of DER could also cause technical problems in voltage quality and system protection. Reconfiguration of distribution network is aimed to minimize power loss and to improve voltage quality in order to enhance the distribution system performance. In this study, reconfiguration method is based on an improved PSO. The method has been tested in a 60-bus Bantul distribution network of Yogyakarta Special Region province, Indonesia. The simulation results show the importance of reconfiguring the network for enhancing the distribution system performance in the presence of DER.
Volume: 13
Issue: 3
Page: 759-766
Publish at: 2015-09-01

SLRV: An RFID Mutual Authentication Protocol Conforming to EPC Generation-2 Standard

10.12928/telkomnika.v13i3.1440
Mu’awya; Higher College of Technology HCT Naser , Ismat; Albaha University Aldmour , Rahmat; Albaha University Budiarto , Pedro; Carlos III University of Madrid Peris-Lopez
Having done an analysis on the security vulnerabilities of Radio Frequency Identification (RFID) through a desynchronization and an impersonation attacks, it is revealed that the secret information (i.e.: secret key and static identifier) shared between the tag and the reader is unnecessary. To overcome the vulnerability, this paper introduces Shelled Lightweight Random Value (SLRV) protocol; a mutual authentication protocol with high-security potentials conforming to  electronic product code (EPC) Class-1 Generation-2 Tags, based on lightweight and standard cryptography on the tag’s and reader’s side, respectively. SLRV prunes de-synchronization attacks where the updating of internal values is only executed on the tag’s side and is a condition to a successful mutual authentication. Results of security analysis of SLRV, and comparison with existing protocols, are presented.
Volume: 13
Issue: 3
Page: 1054-1061
Publish at: 2015-09-01

The Spatial-Temporal Anomaly Detection Algorithm in Wireless Sensor Networks

10.12928/telkomnika.v13i3.2010
Liu; China University of Mining and Technology Xin , Zhang; China University of Mining and Technology Shaoliang
As the traditional anomaly detection algorithms cannot effectively identify the spatial-temporal anomaly of the wireless sensor networks (WSNs), taking the CO2 concentration collected by WSNs for example, we propose the spatial-temporal anomaly detection algorithm in wireless sensor network. First we use the 3 rules to realize the anomaly detection of the adaptive threshold. Then extract the eigenvalue (average) of sliding window to be detected, construct the spatial-temporal matrix for the relationship between neighbor nodes in the specified interval, use the fuzzy clustering method to analyze the eigenvalue of adjacent nodes in spatial-temporal correlation and classify them, and identify abnormal leakage probability according to the results of the classification. Finally, use real data to verify this algorithm and analyze the parameters selected , the results show that the algorithm is high detection rate and low false alarm rate.
Volume: 13
Issue: 3
Page: 894-903
Publish at: 2015-09-01

Vehicle Sensor Self-Powered Technology Research Based on Piezoelectric

10.11591/ijeecs.v15.i3.pp452-457
Sang Ying-Jun , Wu Shangguang , Li Man , Gao Yang , Li Haoxiang , Huang Fei , Hao Yun-Rong , Fan Yuan-Yuan
As a result of the electric vehicles popularity and the development of vehicles intelligent, the number of vehicle sensors surge, meanwhile, many defects of traditional energy supply are increasingly prominent, such as pollution and maintenance difficulties. Taking into account the vehicle vibration exist everywhere, we use the piezoelectric technology to collect vibration energy, and designs a piezoelectric vibration energy harvesting system to be used to solve the energy problem of micro-power sensor. In this paper, the system structure and the theoretical model are analyzed, and the mathematical model of the system vibration frequency and the piezoelectric output have been put forward, then a piezoelectric energy harvesting device is designed on the basis of simulation analysis. Experiments have been done to test the performance of its power generation in the case of resonance. The results showed that the theoretical model proposed in this paper can be a good predictor of the output characteristics of the system. As the resonance frequency is 16.5 Hz, acceleration is 0.5g, the maximum open circuit voltage of the system obtained is 3.5 volts, the optimum load resistance is 425kΩ, and the vibration energy collection device maximum load power is 14 uW. Conclusion: Greater energy could be caught to meet the vehicle sensor power supply needs with the use of super capacitor.
Volume: 15
Issue: 3
Page: 452-457
Publish at: 2015-09-01

Simple, Easy-use and Low-cost Software for Design of Single and Cascaded Microring Resonators Using Semi-numerical Method

10.12928/telkomnika.v13i3.1733
Budi; Universitas Pendidikan Indonesia Mulyanti , Lilik; Universitas Pendidikan Indonesia Hasanah , Tommi; Universitas Pendidikan Indonesia Hariyadi , Arjuni; Universitas Pendidikan Indonesia B Pantjawati , Heru; Arsari Group Yuwono , P. Susthita; Universiti Kebangsaan Malaysia Menon , Sahbudin; Universiti Kebangsaan Malaysia Shaari
Development of a simple, easy and low-cost software for designing of waveguide-coupled single and cascaded microring resonator (MRRs) using semi-numerical calculation based on transfer matrix method (TMM), is presented in this paper. The software uses a device model which is embedded on the high index contrast (HIC) structure of silicon-on-insulator (SOI) with monomodal cavity for TE-mode polarizations, operating around 1550 nm optical wavelength. The main aim of the software is to estimate the microring resonator performance parameters, such as free spectral range (FSR) and quality factor (Q-factor). The software is very simple and easy to use. With a standard laptop computer, it only takes few seconds to obtain transmission response, FSR and Q-factor of single MRR for varied waveguides separation distance and ring radius. The results were then verified using simulation method based on finite integration technique using 3D electromagnetic simulator, which need a high memory and processor of computer and take days to execute the simulation. We found only small discrepancy, which in averages are about 4.25% and 10.80% for FSR and Q-factor, respectively. In general, the results obtained from this software are closer to 3D electromagnetic simulation results.
Volume: 13
Issue: 3
Page: 820-827
Publish at: 2015-09-01

LEC-TMAC: Improving Energy Consumption & Latency in TMAC Protocol for Wireless Body Area Network

10.11591/ijeecs.v15.i3.pp430-435
Shravan Kumar Upadhayay , Mansi Gupta
The most common protocols for Wireless Body Area Network (WBAN) like TMAC, ZigBeeMAC, Baseline MAC protocol .In this paper, evaluating the effects of LEC-TMAC Protocol wireless body area network basis of Latency and energy consumption. This analysis is important in point of view that the varying requirement of WBAN according to varying conditions. In LEC-TMAC, the application packet rate of nodes a considerable effect is observed on latency and energy consumption for MAC protocols that is presented in the paper. As a conclusion, we invoke a number of new research challenges with regard to prospects of Wireless body area network and other issues.
Volume: 15
Issue: 3
Page: 430-435
Publish at: 2015-09-01

Failure Mode and Effect Analysis of Power Transformer Based on Cloud Model of Weight

10.12928/telkomnika.v13i3.1804
Jianpeng; Shijiazhuang Tiedao University Bian , Xiaoyun; Shijiazhuang Tiedao University Sun , Jing; Shijiazhuang Tiedao University Yang
As the key component of a power system, the power transformer directly impacts the reliability and safety of the system. Failure mode and effects analysis (FMEA) is a methodology used to analyze potential failure modes within a system and has been used extensively to examine the power transformer’s performance in various potential failure scenarios. However, the FMEA method has several flaws; for example, the non-differential analysis of evaluation index and the impossibility of evaluating the actual risk among risk priority number (RPN) values that on the surface are equal. The cloud model of weight incorporates the relative importance of index. This paper proposes applying FMEA based on the cloud model of weight to assess a power transformer for risk, and shows that this method can effectively overcome the defects of traditional FMEA assessment methods.
Volume: 13
Issue: 3
Page: 776-782
Publish at: 2015-09-01

An Intelligent Supplementary Lighting System for the Strawberry Greenhouse

10.12928/telkomnika.v13i3.1973
Zhiliang; Sichuan Agriculture University Kang , Lijia; Sichuan Agriculture University Xu , Fei; Sichuan Agriculture University Xiao
An intelligent supplementary lighting system for a strawberry greenhouse is developed in this study using the embedded controller S3C6410 as core. This system detects the temperature and lighting information of the strawberry greenhouse with the temperature sensor DS18B20 and the lighting sensor 2DU6. It stores, displays, analyzes, and processes the collected information with S3C6410 and transfers the control commands to STC89C52 through APC220-43. Thus, it realizes temperature regulation of the strawberry greenhouse and intelligent supplementary lighting of red–blue LED combined lights. The test result shows that this system not only realizes supplementary lighting as required and by wave bands, but also saves electric power. This system has distinctive features of strong applicability, good expandability, stable and reliable operation, and visual and simple control.
Volume: 13
Issue: 3
Page: 752-758
Publish at: 2015-09-01

ERP Selection Using Fuzzy-MOGA Approach: A Food Enterprise Case Study

10.12928/telkomnika.v13i3.1494
Joko; Graduate School of Bogor Agricultural University Ratono , Kudang Boro; Bogor Agricultural University Seminar , Yandra; Bogor Agricultural University Arkeman , Arif Imam; Bogor Agricultural University Suroso
Selection of Enterprise Resource Planning (ERP) system is a complex decision-making process and one of the critical success factors (CSFs) in ERP adoption life cycle. Many ERP implementation failures are caused by improper package selection. Various approaches have been used, but not using optimization techniques. This study developed a Fuzzy-Multiobjective Genetic Algorithm (Fuzzy-MOGA) approach to optimize the quality of ERP selection criteria that complies with ISO25010 quality standard and cost. A case study was conducted on an agro-industrial company. The result shows the approach of Fuzzy-MOGA with NSGA-II method facilitate a complex decision-making for ERP selection optimally.
Volume: 13
Issue: 3
Page: 1105-1112
Publish at: 2015-09-01

Simplified Linear Configuration Model of 3X3 Single Mode Fiber Coupler using Matrix Transfer

10.12928/telkomnika.v13i3.2094
Saktioto; University of Riau Saktioto , Dedi; Universiti Teknologi Malaysia Irawan , Defrianto; University of Riau Defrianto
Experimental design and operation of a directional fiber coupler having identical-output ratio is successfully fabricated.  The coupling region is imposed by fusion temperature 800-1350 0C injecting the Hydrogen gas at 1Atm. Concurrently the coupled-mode theory is used to model power transfer between the waveguides by using transfer matrix method. By 1mW source input power to one of three input ports, it shows that power propagation among three coupled fibers is normalized; the optical fiber are nearly identical and a similar separation between them. The matrix configuration of  3X3 is also used to calculate the polarization effect of directional fiber coupler. It is found that the incident power polarized with various angle causes power output at both three output ports decrease exponentially. This 3X3 directional fiber coupler design is a significant passive component for various functions power splitter and routers.
Volume: 13
Issue: 3
Page: 846-843
Publish at: 2015-09-01

Design and Implementation of Earth Image Classification Using Unmanned Aerial Vehicle

10.12928/telkomnika.v13i3.1786
Barlian Henryranu; University of Brawijaya Prasetio , Ahmad Afif; University of Brawijaya Supianto , Gembong Edhi; University of Brawijaya Setiawan , Budi Darma; University of Brawijaya Setiawan , Imam; University of Brawijaya Cholissodin , Sabriansyah Rizkiqa; University of Brawijaya Akbar
Research in the field of image classification has been widely applied and developed, especially in the field of satellite imagery. Image classification is the process of grouping the pixels in an image into a number of classes, so that each class can describe an entity with certain characteristics. The research aims to build software that can perform the classification of earth image results from UAV (Unmanned Aerial Vehicle) monitoring. The Image converted into YUV format then classified using Fuzzy Support Vector Machine (FSVM). This research designed elements that UAVs will be used for monitoring as follows: (1) the control station, which designed the software on a computer that is used to send or receive data, and display the data in graphical form, (2) payload, using the camera to capture images and send to the control station, (3) communication system using TCP/IP protocol, and (4) UAV, using X650 quadcopter products from xaircraft. All of data can be received if it is sent by several segmented package into smaller parts. The results of image classification, the image of the monitoring carried out on the UAV sized 256 x 256 pixels with a total number of 450 training data size. It is 16x16 pixel image data. Tests performed to classify the image into 3 classes, namely agricultural area, residential area, and water area. The highest accuracy value of 77.69% obtained by the number of training data as much as 375.
Volume: 13
Issue: 3
Page: 1021-1028
Publish at: 2015-09-01

Scanning-fluorescence Reader Based on Embedded System

10.12928/telkomnika.v13i3.1808
Zhonglong; Xiamen University Zhao , Xiaoping; Xiamen University Min , Shengxiang; Xiamen University Ge , Ningshao; Xiamen University Xia
To measure the concentration of C-reactive protein (CRP) in serum, a portable, scanning-fluorescence reader based on time-resolved fluoroimmunoassays was developed. The scanning-fluorescence reader integrates with the AD7707 converter, which performs at a high accuracy. The photosensitive diode acts as the photoelectric conversion device, an optical module based on optical fibers, which is able to concentrate the excitation light from an LED into a line-shape beam, was designed to sendand receive the optical signal. The device subsequently addresses waveform data using a gradient, smoothing, and binarization method. When the device measures the CRP fluorescence test strip, the results exhibited a good linearity (0.99998) and the CVs (coefficient of variation) were below 5%, which indicate high accuracy. At the same time the system is low cost and small size.
Volume: 13
Issue: 3
Page: 794-805
Publish at: 2015-09-01

A Review on Perturb and Observe Maximum Power Point Tracking in Photovoltaic System

10.12928/telkomnika.v13i3.1439
Rozana; Universiti Teknologi Malaysia Alik , Awang; Universiti Teknologi Malaysia Jusoh , Tole; Universitas Ahmad Dahlan Sutikno
Solar energy is becoming popular and has drawn lots of attention from researchers nowadays. However, the output power of the photovoltaic (PV) arrays varies with solar irradiation and temperature, which affect the efficiency of PV arrays. Therefore, Maximum Power Point Tracking (MPPT) control technique is used to extract the maximum available power from the PV arrays. Perturb and Observe (P&O) algorithm is one of the favorite techniques frequently used due to its simplicity and low cost. Yet, the conventional P&O algorithm has several drawbacks, which leads to power loss and lack of efficiency. This paper presents comparison of the basic P&O algorithm with the modified P&O algorithm used for partial shading condition in terms of complexity, accuracy, cost, and basic concept of each method.
Volume: 13
Issue: 3
Page: 745-751
Publish at: 2015-09-01

Computational Simulation of Comb-plate Expansion Joints

10.12928/telkomnika.v13i3.1978
Liang; Chongqing Jiaotong University Tang , Xiaoyan; Chongqing Jiaotong University Zhang , Jian; Chongqing Jiaotong University Tang , Wu; Chongqing Jiaotong University Jie
A finite element model of the expansion Joints’ common damages of a novel comb-plate by using the finite element software ABAQUS is presented in this paper. The mechanical behavior of expansion Joints is analyzed to verify the weak parts of it. The research results provide a reference for the design of the comb-plate expansion Joints.
Volume: 13
Issue: 3
Page: 1097-1104
Publish at: 2015-09-01

Optical Fiber Bending Detection on Long Distance OPGW using OTDR

10.12928/telkomnika.v13i3.1726
M. F. M.; Universiti Teknikal Malaysia Melaka Salleh , Z.; Universiti Teknikal Malaysia Melaka Zakaria
In Malaysia, thousands of kilometers of Optical Ground Wire (OPGW) have been installed by a utility company. For long distance fiber cable, there is a possibility of optical fiber to bend with very small radius especially in joint closures which caused optical power to attenuate. This attenuation is known as ‘bend losses. Bend loss increases the total power attenuation of optical fiber. In addition, for long distance fiber cable, it is important to avoid any extra loss as the fiber itself attenuates 0.2 to 0.35 dB/km and splice loss about 0.1 dB each. Hence, in this study, the method of detecting bend loss as well as optical fiber bending is presented. The result of this study is expected to allow fiber industry players to determine the exact location and proper rectification can be done to solve bend loss problem.
Volume: 13
Issue: 3
Page: 889-893
Publish at: 2015-09-01
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