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28,188 Article Results

Inter-area Oscillation Damping using an STATCOM based Hybrid Shunt Compensation Scheme

10.11591/ijpeds.v7.i4.pp1172-1180
Vahid Farzam , Ahad Mokhtarpour
FACTS devices are one of the latest technologies which have been used to improve power system dynamic and stability during recent years. However, widespread adoption of this technology has been hampered by high cost and reliability concerns. In this paper an economical phase imbalanced shunt reactive compensation concept has been introduced and its ability for power system dynamic enhancement and inter-area oscillation damping are investigated. A hybrid phase imbalanced scheme is a shunt capacitive compensation scheme, where two phases are compensated by fixed shunt capacitor (C) and the third phase is compensated by a Static Synchronous Compensator (STATCOM) in shunt with a fixed capacitor (CC). The power system dynamic stability enhancement would be achieved by adding a conventional Wide Area Damping Controller (WADC) to the main control loop of the single phase STATCOM. Two different control methodologies are proposed: a non-optimized conventional damping controller and a conventional damping controller with optomised parameters that are added to the main control loop of the unbalanced compensator in order to damp the inter area oscillations. The proposed arrangement would, certainly, be economically attractive when compared with a full three-phase STATCOM. The proposed scheme is prosperously applied in a 13-bus six-machine test system and various case studies are conducted to demonstrate its ability in damping inter-area oscillations and power system dynamic enhancement.
Volume: 7
Issue: 4
Page: 1172-1180
Publish at: 2016-12-01

Comparison of DSTATCOM Performance for Voltage Sag Alleviation

10.11591/ijeecs.v4.i2.pp305-316
Miska Prasad , Ashok Kumar Akella
This paper describes the comparative analysis of three different control techniques of distributed flexible AC transmission system (DFACTS) controller called as distributed static synchronous compensator (DSTATCOM), aimed at power quality (PQ) enhancement in terms of voltage sag mitigation in a three-phase four-wire (3p4w) distribution system. A DSTATCOM is one of the major power quality improvement devices which consist of a DC energy source, a voltage source inverter (VSI), a filter, a coupling transformer and the control system. The control strategy based on synchronous reference frame (SRF) theory, instantaneous active and reactive current (IARC) theory and propositional-integral (PI) controller has been used for reference current generation of voltage source inverter (VSI) based DSTATCOM. The SRF, IARC and PI control based DSTATCOM is validated through dynamic simulation in a MATLAB\SIMULINK environment under linear as well as nonlinear loads.
Volume: 4
Issue: 2
Page: 305-316
Publish at: 2016-11-01

Crowd Detection in Still Images Using Combined HOG and SIFT Feature

10.11591/ijeecs.v4.i2.pp447-458
Machbah Uddin , Hira Lal Gope , Md. Sayeed Iftekhar Yousuf , Dilshad Islam , Mohammad Khairul Islam
Person detection and tracking in crowd is a challenging task. We detect the head region and based on this head region we can detect people from crowd. Individual object detection has been improved significantly in recent times but the crowd detection and tracking contains some challenges. Crowd analysis is a highly focused area for law enforcement, urban engineering and traffic management.  There are a lot of incident occurred in crowd area during some fabulous event. In this research low resolution and verities of image orientation is a key factor as well as overlapping person images in crowd misguided the system. An enhanced system of interest point detection based on gradient orientation information as well as improved feature extraction HOG is used for identifying the human head or face from crowd. We have analyzed different types of images in different varieties and found accuracy 88-90%. In a number of applications, such as document analysis and some industrial machine vision tasks, binary images can be used as the input to algorithms that perform useful tasks. These algorithms can handle tasks ranging from very simple counting tasks to much more complex recognition, localization, and inspection tasks. Thus by studying binary image analysis before going on to gray-tone and color images, one can gain insight into the entire image analysis process.
Volume: 4
Issue: 2
Page: 447-458
Publish at: 2016-11-01

Voltage Flickering Reduction Using Distribution STATCOM

10.11591/ijeecs.v4.i2.pp263-270
Yahia M Esmail , S K Elsayed , M A Mehanna
Power Quality is becoming intensity concerned from both electric utilities and customers. Voltage Flicker is a major power quality problem as it has a significant impact on both the equipment and production environment. This work describes the voltage control technique of reduction of voltage flicker and clearing fault using Distribution Static Synchronous Compensator (DSTATCOM). The test system used is IEEE 9-bus distribution system clarified the optimal location of DSTATCOM by using Artificial Neural Network. A simulation was done using MATLAB/Simulink software.
Volume: 4
Issue: 2
Page: 263-270
Publish at: 2016-11-01

Hybrid Method for Optimal Placement of Multiple SPV Based Multiple RDGs in Microgrid System

10.11591/ijeecs.v4.i2.pp298-304
Samir M. Dawoud , Xiangning Lin , Firas M. F. Flaih , Qasim Kamil Mohsin
A hybrid method has been suggested for optimal placement of multiple renewable distribution generations (RDGs) in microgrid system. The analytical approaches have not been appropriated for optimal placements of multiple solar photovoltaic (SPV) based on RDGs alone. In this work, hybridization of a fuzzy method and particle swarm optimization (PSO) search for the optimal placement of multiple RDGs in microgrid systems for decreasing the active power loss has been proposed. In this approach, the sizes of RDGs are evaluated at every bus by PSO method while the locations are determined by fuzzy based technique. The objective function (OBF) has been minimized under operating constraints. The improvements in nodal voltage profile have been observed. To confirm the proposed hybrid approach, results have been compared with bat algorithm (BA) technique and existing fast improved analytical (IA) method results. The suggested technique has been tested on 33-bus and 69-bus microgrid system.
Volume: 4
Issue: 2
Page: 298-304
Publish at: 2016-11-01

Total Harmonic Distortion at Fault in RLC Load

10.11591/ijeecs.v4.i2.pp325-332
Pankaj Aswal , Suyash Kumar Singh , Niharika Agarwal , Vivek Sharma , Gayatri Sharma
This paper focuses on the calculation of total harmonic distortion (THD) at various fault situations in case of RLC load. The faults are created by introducing heavy impedance of 1000 ohm, by blowing off the gate pulse at one of the terminals of the mosfet, and by introducing a line to ground fault. The Matlab based simulation has been done to show these effects.
Volume: 4
Issue: 2
Page: 325-332
Publish at: 2016-11-01

A Review on Model of Integrating Renewable Distributed Generation into Bali’s Power Distribution Systems: Issues, Challenges, and Possible Solutions

10.11591/ijeecs.v4.i2.pp245-255
Ngakan Putu Satriya Utama , Rukmi Sari Hartati , Wayan G. Ariastina , Ida Bagus A. Swamardika , Ontoseno Penangsang
Spurred by a global energy crisis, the use of renewable distributed generation (DG) with solar photovoltaic (PV) energy, micro-hydro power, and biomass power are gaining momentum and play major role in Bali’s distribution system as an alternative distribution system planning option. If distributed generation planning is optimal by selected optimization of multi-objective function under certain operating constraints and then their site and size are also selected optimally, the penetration of DGs is potentially beneficial. This paper would review techno-economic model objective, voltage profile improvement and power losses constraints as well as optimization based model using particle swarm optimization (PSO) algorithm application in Bali’s distributed generation planning.
Volume: 4
Issue: 2
Page: 245-255
Publish at: 2016-11-01

Clustering Techniques for Software Engineering

10.11591/ijeecs.v4.i2.pp465-472
Shohag Barman , Hira Lal Gope , M M Manjurul Islam , Md Mehedi Hasan , Umme Salma
Software industries face a common problem which is the maintenance cost of industrial software systems. There are lots of reasons behind this problem. One of the possible reasons is the high maintenance cost due to lack of knowledge about understanding the software systems that are too large, and complex. Software clustering is an efficient technique to deal with such kind of problems that arise from the sheer size and complexity of large software systems. Day by day the size and complexity of industrial software systems are rapidly increasing. So, it will be a challenging task for managing software systems. Software clustering can be very helpful to understand the larger software system, decompose them into smaller and easy to maintenance. In this paper, we want to give research direction in the area of software clustering in order to develop efficient clustering techniques for software engineering. Besides, we want to describe the most recent clustering techniques and their strength as well as weakness. In addition, we propose genetic algorithm based software modularization clustering method. The result section demonstrated that proposed method can effectively produce good module structure and it outperforms the state of the art methods. 
Volume: 4
Issue: 2
Page: 465-472
Publish at: 2016-11-01

Balinese Script’s Character Reconstruction Using Linear Discriminant Analysis

10.11591/ijeecs.v4.i2.pp479-485
Made Sudarma , Sri Ariyani , Manuh Artana
Balinese people have one of the civilization history and cultural heritage are handwritten in Balinese script on palm leaves known as Balinese Papyrus (LontarAksara Bali). Until now that cultural heritage is still continuously strived its preservation along with the implementation begin to be abandoned in public life. Some of Balinese Papyrus now begin to rot and fade under influenced by age. Information technology utilization can be a tool to solve the problems faced in the preservation of the Balinese papyrus. By using digital image processing techniques, the papyrus script can be reconstructed digitally so that it can be retrieved and store the content in the digital media. Balinese papyrus reconstructed through several processes from scanning into a digital image, performing preprocessing for image quality improvement, segmenting the Balinese characters on image, doing character recognition using LDA algorithm, rearranging the result of recognition in accordance with the original content in papyrus, and translating that characters result into Latin. LDA algorithm quite successfully performs the classification associated with handwritten character recognition.
Volume: 4
Issue: 2
Page: 479-485
Publish at: 2016-11-01

Low Power FGSRAM Cell Using Sleepy and LECTOR Technique

10.11591/ijeecs.v4.i2.pp333-340
Kanan Bala Ray , Sushanta Kumar Mandal , Shivalal Patro
In this paper floating gate MOS (FGMOS) along with sleep transistor technique and leakage control transistor (LECTOR) technique has been used to design low power SRAM cell. Detailed investigation on operation, analysis and result comparison of conventional 6T, FGSRAM, FGSLEEPY, FGLECTOR and FGSLEEPY LECTOR has been done. All the simulations are done in Cadence Virtuoso environment on 45 nm standard CMOS technology with 1 V power supply voltage. Simulation results show that FGSLEEPY LECTOR SRAM cell consumes very low power and achieves high stability compared to conventional FGSRAM Cell
Volume: 4
Issue: 2
Page: 333-340
Publish at: 2016-11-01

Adaptive-Fuzzy back stepping control of cable robot vessels

10.11591/ijeecs.v4.i2.pp354-364
Mohammadreza Barzegaran , Sana Tajvidi , Majid Alimohammadi
Importance of sea in development, promotion and safety of the related countries make access to data and recognizing the environment become very important. Surface vessels help access to sea easier regarding technological advancement. Controlling surface vessels is considered as an active field of research regarding offshore, military and research uses. The main problem of controlling surface vessels is that these vehicles are often underactuated. Underatuation means that the system has lower number of independent actuators than degrees of freedom. In this study, designing an output feedback controller in the presence of parametric and non-parametric uncertainties independent of speed signal measurement and regarding actuators dynamic for path tracking of underactuated surface vessels, was studied. In designing controller, dynamic surface control method is used in order to reduce complexity of back stepping control.
Volume: 4
Issue: 2
Page: 354-364
Publish at: 2016-11-01

A Quantum Entanglement Swapping Secret Sharing Agreement Model

10.11591/ijeecs.v4.i2.pp406-411
Shuyue Wu
A verifiable quantum secret sharing protocol model is proposed based on entanglement swapping. The dealer communicates with the participants one by one. The detection pattern or information pattern are choosed by uniform distribution, until he can make sure the information safe to the participant, and then he communicates with the next participant. This agreement not only is to avoid eavesdropping outside, and it can prevent internal fraud, thus the accuracy and security are ensured for information sharing, the verifiable results are achieved.
Volume: 4
Issue: 2
Page: 406-411
Publish at: 2016-11-01

Significant Effect of Vital Rule of Simulators in Wireless Sensor Networks

10.11591/ijeecs.v4.i2.pp424-428
Muhammad Toufique , Hongbo Jiang
It is the requirement of the time, to simulate/emulate for analyzing the system. Therefore we must need some tools for this specific task. This paper is for encompassing the available tools for analyzing and evaluation purpose. Paper having all these exclusive information with detail are not available. We show ATEMU, Avrora, EmStar, J-Sim, NS-2, OMNeT++ and TOSSIM. We try to analyze the tools thoroughly. We define and discusss about the operation, functionality, advantages, disadvantages and constraints. These are the main stream superb simulation tools based on state of the art techniques. We explore on the basis of popularity, accessibility (open source), complexity, accuracy, scalability, extensibility and availability of various problems in homogenous and heterogenous WSN and other networks on different platforms and with or without using different scripting languages.
Volume: 4
Issue: 2
Page: 424-428
Publish at: 2016-11-01

Random Sampling and Signal Bregman Reconstruction Based on Compressed Sensing

10.11591/ijeecs.v4.i2.pp365-372
Guojun Qin , Jingfang Wang
Compressed sensing (CS) sampling is a sampling method which is based on the signal sparse. Much information can be extracted from as little as possible of the data by applying CS and this method is the idea of great theoretical and applied prospects. In the framework of compressed sensing theory, the sampling rate is no longer decided in the bandwidth of the signal, but it depends on the structure and content of the information in the signal. In this paper, the signal is the sparse in the Fourier transform and random sparse sampling is advanced by programing random observation matrix for peak random base. The signal is successfully restored by the use of Bregman algorithm. The signal is described in the transform space, and a theoretical framework is established with a new signal descriptions and processing. By making the case to ensure that the information loss, signal is sampled at much lower than the Nyquist sampling theorem requiring rate,but also the signal is completely restored in high probability. The random sampling has following advantages: alias-free sampling frequency need not obey the Nyquist limit and higher frequency resolution.
Volume: 4
Issue: 2
Page: 365-372
Publish at: 2016-11-01

Music Recommendation System Based on Context Using Case-Based Reasoning and Self Organizing Map

10.11591/ijeecs.v4.i2.pp459-464
Gst Ayu Vida Mastrika Giri , Agus Harjoko
Effective music recommendation can decrease listener’s effort in choosing music that will be listened. Music recommendation is not only can be obtained based on genre or audio similarity, because listener’s music choices are also influenced by the listener’s context (mood, occasion, part of day, date, weather, region, month, and weekday). This research used Case-Based Reasoning (CBR) for determining music recommendation based on listener’s context data and also Self Organizing Map (SOM) which is used as an indexing method in CBR. Inputs given by user to the system are user’s occasion and mood desired by user. The system output is a playlist consists of music that suitable with user’s context and desired mood.
Volume: 4
Issue: 2
Page: 459-464
Publish at: 2016-11-01
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