Vol. 12 No. 11 NOV 2014

Vol. 12 No. 11 NOVEMBER 2014 International Journal of Computer Science and Information Security

Publication NOVEMBER 2014, Volume 12 No. 11 (Download Full Journal) (Archive) (Download 2)

Copyright © IJCSIS. This is an open access journal distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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1. Paper 31101402: Consistency of Commitments in Social Web Services (pp. 1-5)

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Marzieh Adelnia, Department of Computer Engineering, Sheikh Bahaee University, Isfahan, Iran

Mohammad Reza Khayyambashi, Department of Computer Engineering, University of Isfahan, Isfahan, Iran

Abstract - Web Service is one of the most important information sharing technologies on the web and one of the example of service oriented processing. To guarantee accurate execution of web services operations, they must be accountable with regulations of the social networks in which they sign up. This operation implement using controls called “Commitment”. This paper studies commitments , then has an overview on existing researches, web service execution method using commitments and information sharing methods between web services based on commitments and social networks. A key challenge in this technique is consistency ensuring in execution time. The aim of this study is presenting an algorithm for consistency ensuring between commitments. An application designed for proving correctness of algorithm.

Index Terms – Commitments, Web Service, Consistency, Social Networks, Social Web Service.

2. Paper 31101404: Modeling and Simulation of SRF Control Based Shunt Active Power Filter and Application to BLDC Drive (pp. 6-12)

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Y. Gayathri (1), K. Harinath Reddy (2), S. Anupama (3)

(1) PG Student, Department of EEE, Annamacharya Institute of Technology & Sciences, Rajampet, India. (2) Associate Professor, Department of EEE, Annamacharya institute of technology and sciences, Rajampet,India.

(3) Assistant Professor, Department of EEE, Annamacharya Institute of Technology & Sciences, Rajampet,India.

Abstract — With the widespread use of harmonic generating devices, the control of harmonic currents to maintain a high level of power quality is becoming increasingly important. An effective way for harmonic suppression is the harmonic compensation by using active power filter. This paper presents a comprehensive survey of active power filter (APF) control strategies put forward recently. Many control techniques have been designed, developed, and realized for active filters in recent years. This paper presents different types of control techniques like PQ theory, Synchronous reference frame methods for real time generation of compensating current for harmonic mitigation and reactive power compensation. All the techniques are analyzed mathematically and simulation results are obtained which are being compared in terms of its compensation performance with different parameters under steady state condition. The techniques analyzed are the PQ theory, Synchronous Reference Frame Theory (SRF), SRF theory without synchronizing circuit like phase lock loop (PLL) also called instantaneous current component theory and finally modified SRF theory. Simulation results are obtained under sinusoidal balanced voltage source balanced load condition. The comparison and effectiveness of all the methods is based on the theoretical analysis and simulation results obtained with MATLAB employing a three phase three wire shunt active filter test system. Finally shunt active power filter is applied to BLDC drive application. THD plots with and without APF are presented.

Keywords-component; Synchronous Reference Frame, instantaneous current component theory, Modified SRF, Active Filter, Harmonics. BLDC Drive

3. Paper 31101405: An Auxiliary Fuzzy Logic Controller for Mitigating Low Frequency Oscillations (pp. 13-18)

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C. Ganesh, Dr. M. Padma Lalitha, P. Divya

Dept. of EEE, AITS college Rajampet

Abstract - A frequent adverse phenomenon of Low frequency oscillations (LFO) are which develop the risk of instability for the power system. This brief examines the damping functioning of the static synchronous series compensator (SSSC) prepared with an auxiliary fuzzy logic controller (FLC). At the commencement, a customized Heffron-Phillips representation of a single machine infinite bus (SMIB) system set up with SSSC is recognized.

Keywords: Low frequency oscillations (LFO), SSSC, SMIB power system, Heffron-Phillips model, fuzzy logic damping controller.

4. Paper 31101406: Power Flow Enhancement using Fuzzy based Power Converter Connected in DG fed Distribution Network (pp. 19-26)

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S. Anupama, O. Hemakesavulu, N. S. Pavani

Dept. of EEE, A.I.T.S-Razampeta, A.P, India.

Abstract --- This paper presents the distributed generating (DG) systems employed in distribution systems interfaced by design of proportional-integral controller (PI) and fuzzy logic controller (FLC) based 3-phase power converter. To maintain smooth transfer of power flow in distribution systems for different load conditions, the step-up converter must regulate its DC voltage and allows the VSI to stabilize terminal voltage. The power flow between the grid and the DG is controlled by the power /voltage control methods and phase-locked loop (PLL) algorithm is used to synchronize the grid and the DG. Additionally, a set of simulations are performed for different load types and its working conditions by using fuzzy logic controller and compared with classic PI controllers. The system is designed and simulated using MATLAB/ Simulink Software.

Keywords-distributed generating (DG), fuzzy logic controller (FLC), islanding mode, 3-phase power converter, phase-locked loop (PLL), proportional-integral controller (PI),and voltage source inverter (VSI).

5. Paper 31101409: AC Transmission with Low Frequency for Renewable Energy Sources in Offshore Location (pp. 27-32)

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P. Bala Chennaiah, Assistant Professor, Department of EEE, Annamacharya institute of technology and sciences, Rajampet, AP, India.

S. Anupama, Assistant Professor, Department of EEE, Annamacharya Institute of Technology & Sciences, Rajampet, AP, India.

Nookareddy Thulasi, PG Student, Department of EEE, Annamacharya Institute of Technology & Sciences, Rajampet, AP, India.

Abstract - This paper investigates the feasibility of using the low- frequency ac transmission(LFAC)system The LFAC system improves the transmission capacity and distance compared to the conventional AC solution at the nominal frequency, e.g. 50Hz or 60Hz. The main process of this the wind power plant collection system is dc based, and connects to the LFAC transmission line with a 12-pulse thyristor converter. It is estimated that the LFAC system is competitive in the transmission distance up to 160 km. Simulation results are provided to illustrate the system’s performance.

Keywords - Cycloconverter; Offshore wind power; Under water power cables; Thyristor Converter; AC Filters

6. Paper 31101410: An Energy Storage Based Facts Device to Damp Tie Line Oscillations and Voltage Profile Improvement under Transient State Using Fuzzy Logic Controller (pp. 33-38)

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C. Ganesh, P. BalaChennaiah, P. Asha

Dept. of EEE, AITS, Rajampet, India

Abstract - Large interconnected power systems often suffer from weakly damped swings between synchronous generators and subsystems. This paper proposes an Superconducting Magnetic Energy Storage System (SMES) based Unified Power Flow Controller(UPFC) using Fuzzy logic controller to damp tie line oscillations and improve the voltage profile under transient condition. This novel method provides active and reactive power controllability through the line. Thus the SMES based UPFC is effective in damping inter area oscillations, and the performance of device is compared with fuzzy controller against PI controller. The effectiveness of the proposed approach to modeling and simulation is implemented in Simulink environment of MATLAB.

Keywords - PWM based Voltage Source Converter, UPFC, SMES, Fuzzy logic controller, Power Oscillation Damping.

7. Paper 31101413: Simulation of Collision Resistant Secure Sum Protocol (pp. 39-43)

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Samiksha Shukla, Department of CSE, Christ University, Bangalore, India

Dr. G. Sadashivappa, Department of Telecommunication, R V College of Engineering, Bangalore, India

Dr. Durgesh Kumar Mishra, Department of CSE, Sri Aurobindo Institute of Tech, Indore, India

Abstract — secure multi-party computation is widely studied area in computer science. It is touching all most every aspect of human life. This paper demonstrates theoretical and experimental results of one of the secure multi-party computation protocols proposed by Shukla et al. implemented using visual C++. Data outflow probability is computed by changing parameters. At the end, time and space complexity is calculated using theoretical and experimental results.

Keywords - Security, Confidentiality, Trust, Privacy, Trusted third party (TTP) Secure Multi-Party Computations (SMC)

8. Paper 31101414: Battery Energy Storage System in DFIG Based Wind Energy Conversion System (pp. 44-52)

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S. Mahaboob Basha, S. Sarada, P. Bhagya Lakshmi

Dept. of EEE, AITS, Rajampet, India.

Abstract — This paper gives a new control strategy for a grid-connected doubly fed induction generator (DFIG)-based wind energy conversion system (WECS). Control strategies for the grid side and rotor side converters placed in the rotor circuit of the DFIG are presented along with the mathematical modeling of the employed configuration of WECS. The proposed topology includes a battery energy storage system (BESS) to reduce the power fluctuations on the grid due to the varying nature and unpredictability of wind. The detailed design, sizing, and modeling of the BESS are given for the grid power leveling. Existing control strategies like the maximum power point extraction of the wind turbine, unity power factor operation of the DFIG are also mentioned along with the proposed strategy of “grid power leveling.” An analysis is made in terms of the active power sharing between the DFIG and the grid taking into account the power stored or discharged by the BESS, depending on the available wind energy. The proposed strategy is then simulated in MATLAB-SIMULINK and the developed model is used to predict the behavior.

Index Terms— Doubly fed induction generator (DFIG), Battery energy storage system (BESS), grid power leveling, vector control, wind energy conversion system (WECS).

9. Paper 31101422: Implementation of Personalization in Web Usage Mining Using Fuzzy Logic (pp. 53-61)

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Sasikala P, Head of the Department of Computer Science, Sriram College of Arts & Science, Perumalpattu, Tiruvallur Dist. India

Naganathan E.R, Professor& Head, Department of CSE, Hindustan University, Chennai. India

Abstract - This paper presents implementation of Fuzzy logic in web personalization. Web personalization is a process of getting access to a requested page during the browsing of web pages. In order to achieve quick access to the requested webpage, log details of user is used as the a priori data. Conventional statistical methods are available to access the requested webpage. However, due to the vast number of users accessing a particular website, intelligent techniques have to be developed for handling huge amount data. In this paper, Fuzzy logic approach has been used for web personalization.

Keywords: Web server log, Web usage mining, Data mining, e-learning, Fuzzy logic

10. Paper 31101403: Low Frequency Oscillations Damped By Using D-Facts Controller (pp. 62-69)

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B. Nirosha, M.Tech Student , Department of EEE, Annamacharya Institute of Technology & Sciences, Rajampet, A.P, India

S. Sarada, Assiciate Professor, Department of EEE, Annamacharya Institute of Technology & Sciences, Rajampet,A.P, India

K. Harinath Reddy, Assistant Professor, Department of EEE, Annamacharya Institute of Technology & Sciences, Rajampet,A.P, India

Abstract - The paper demonstrates the basic module, steady state operation, mathematical analysis, and current injection modeling of the DPFC for two areas. The purpose of the work reported in this paper is to design an oscillation damping controller for DPFC to damp low frequency electromechanical oscillations. The optimal design problem is formulated as an optimization problem, and particle swarm optimization (PSO) is employed to search for the damping controller parameters. Results demonstrate that DPFC with the proposed model can more effectively improve the dynamic stability and enhance the transient stability of power system compared to the genetic algorithm based damping controllers. The r and λ are relative magnitude and phase angle of DPFC controller. Moreover, the results show that the λ based controller is superior to the r based controller.

Keywords: DFACTS, DPFC, UPFC, Power Flow Controller, current injection model.