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Bulletin of Electrical Engineering and Informatics
Published by Universitas Ahmad Dahlan
ISSN : -     EISSN : -     DOI : -
Core Subject : Engineering,
Electrical & Electronics Engineering
Bulletin of Electrical Engineering and Informatics (Buletin Teknik Elektro dan Informatika) ISSN: 2089-3191, e-ISSN: 2302-9285 is open to submission from scholars and experts in the wide areas of electrical, electronics, instrumentation, control, telecommunication and computer engineering from the global world. The journal publishes original papers in the field of electrical, computer and informatics engineering.
Arjuna Subject : -
Articles 2,901 Documents
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Efficient Three Party Key Exchange Protocol H. K. Pathak; Manju Sanghi
Bulletin of Electrical Engineering and Informatics Vol 1, No 3: September 2012
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/eei.v1i3.241

Abstract

Key exchange protocols allow two or more parties communicating over a public network to establish a common secret key called a session key. In 1976, Diffie and Hellman proposed the first practical key exchange (DH key exchange) protocol.  In 2005, Abdalla and  Pointcheval suggested  a new variation  of the computational   DH assumption  called chosen based computational Diffie Hellman (CCDH)  and presented  simple password based authenticated  key exchange protocols.  Since then several three party password  authenticated key agreement  protocols  have  been proposed  In 2007, Lu and  Cao proposed  a simple 3 party authenticated  key exchange  (S-3PAKE)  protocol.  Kim   and  Koi found  that this protocol cannot  resist  undetectable   online password  guessing attack  and gave fixed STPKE’ protocol as a countermeasure  using exclusive-or operation.  Recently,   Tallapally and Padmavathy found that STPKE’ is still vulnerable to undetectable online password guessing attack and gave a modified STPKE’ protocol.  Unfortunately,   we find that, although  modified STPKE’ protocol  can  resist  undetectable   online  password  guessing  attack   but it is vulnerable  to man  in the middle  attack.  Also, we propose and analyze an efficient protocol against all the known attacks.
Performance Evaluation of Direct Torque Control with Permanent Magnet Synchronous Motor Bindeshwar Singh
Bulletin of Electrical Engineering and Informatics Vol 1, No 2: June 2012
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/eei.v1i2.242

Abstract

The direct torque control theory has achieved great success in the control of permanent magnet synchronous motor. A Direct Torque Control (DTC) scheme of Permanent Magnet Synchronous Motor (PMSM) is presented. Based on in-depth analysis of PMSM mathematical model in abc frame and frame are established and the operation principle of DTC-SVPWM system, the relationships between the torque and fundamental components. A novel space vector pulse width modulation (SVPWM) method which has a feature of low harmonic is proposed. The proposed method is adopted to implement the direct torque control (DTC) of a three-phase PMSM. A large number of simulation results show that the DTC System of PMSM has fast response and good dynamic performance. Aiming at the direct torque control in PMSM Drives, in this paper explained the theoretical basis of the direct torque control (DTC) for PMSM firstly. Then explained the difference between the applications of DTC-SVPWM to PMSM. Finally the MATLAB/Simulink models were developed to examine the DTC- SVPWM for PMSM. The simulation results is presented in this paper.
Realization of Hybrid-Electric Powertrain System for a Three Wheeler Auto Taxi Mohammad Saad Alam; Rakan C Chabaan
Bulletin of Electrical Engineering and Informatics Vol 1, No 2: June 2012
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/eei.v1i2.243

Abstract

In this paper, the mechanical powertrain of a conventional three wheeler auto taxi was first analyzed and converted into a hybrid electric power train for similar vehicle requirements. Packaging design strategy of key power train components have been calculated and proposed. The preliminary design is simulated as a series hybrid fuel cell Ni-MH battery vehicle model in PSAT software for a typical city driving cycle. Further an environmental and economic study has been prepared for the proposed vehicle by calculating the emission levels and payback period. This design can be implemented in the longer run on wide range of vehicles; thus creating independence from fossil fuels.
Congestion management Incorporation of FACTS Devices Using Ant Colony Optimization Prakash Burade
Bulletin of Electrical Engineering and Informatics Vol 1, No 2: June 2012
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/eei.v1i2.244

Abstract

This paper presents Ant Colony Algorithm (ACA) based approach for the allocation of FACTS (Flexible AC Transmission System) devices for the improvement of Power transfer capacity in an interconnected Power System. The ACA based approach is applied on IEEE 30 BUS System. The system is reactively loaded starting from base to 200% of base load. FACTS devices are installed in the different locations of the power system and system performance is noticed with and without FACTS devices. First, the locations, where the FACTS devices to be placed is determined by calculating active and reactive power flows in the lines. Ant Colony Algorithm is then applied to find the amount of magnitudes of the FACTS devices. This approach of ACA based placement of FACTS devices is tremendous beneficial both in terms of performance and economy is clearly observed from the result obtained.
Minimum-Order Observers for hybrid Wind Turbine and Fuel cell B. Jaganathan
Bulletin of Electrical Engineering and Informatics Vol 1, No 2: June 2012
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/eei.v1i2.245

Abstract

Renewable Energy Sources are the upcoming energy sources, for they are readily available. The performance of these sources depends upon the available input. A continuous monitoring of the output which is also dependent upon the state variables of the source model (state model) is necessary. It thus, necessitates the incorporation of an observer in the existing system which estimates the state variables continuously. This paper proposes a novel method of design at the design of a minimum order observer for a wind turbine, which further feeds a PMSG. This observer estimates the state variables of the wind turbine and compares this with the state variables of the actual plant model. This in turn generates a control vector which further provides the necessary control actions so that the output of the wind turbine is optimized to an acceptable extent. Three different configurations are made use for the simulation. The plant model with a PI controller in series with it, under open loop,the plant model in its closed loop form with negative feedback and finally the plant with the designed minimum order observer are simulated. It has been observed that the response of the overall system is improved with the implementation of the observer and so does the stability.Matlab/Simulink is used for validating the proposed idea.
Should copper cables be phased out in the last mile? Ibraheem Kateeb
Bulletin of Electrical Engineering and Informatics Vol 1, No 4: December 2012
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/eei.v1i4.246

Abstract

It is commonly held by industry and government that copper cable should be phased out in favor of an all fiber network or wireless. Conversely, fiber optics has been in use for decades without displacing copper based networks. Additionally, copper is still being deployed for broadband services. This raises the following fundamental question: Is there a place for copper cabling in providing broadband solutions in the near and far term?this paper develop comprehensive distinctions between twisted pair copper and alternatives for current and future broadband solutions while rebutting arguments for transitioning to all fiber networks. It also compares fixed solutions against wireless alternatives, and present new technologies that drive continued value of copper conductors in the outside plant. Present personal experiences as well as those from industry professionals on the unique benefits that copper solution has which cannot be replicated by fiber will be shared for the benefit of educating the audiences.The results will show great potential for continued use of twisted pair copper in broadband networks. In the process, it will prove that current socio-political thinking promoting all-fiber broadband networks is flawed.Finally, it will be showed how copper will maintain a complementary role to fiber and wireless technologies as world-wide broadband networks continue to be built out.
A Simple Monitoring Network System of Wireless Sensor Network Shengjun Su; Shuozhong Wang
Bulletin of Electrical Engineering and Informatics Vol 1, No 4: December 2012
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/eei.v1i4.247

Abstract

A SSNS (simple sensor network sniffer) is used to analyze and evaluate the Wireless Sensor Networks (WSN) effectively. SSNS is designed to monitor IEEE 802.15.4 protocol frame, which based on the Ethernet. Unlike the existed monitoring system, our design is much simpler and needs less resource. It is analyzed in this paper that the monitor network framework, time synchronization, and analysis program design. The results show that SSNS works stably, and can real-time display the frame monitored and reflect the dynamic change of WSN.
Load Frequency Control of Interconnected Hydro-Thermal System with Conventional Controllers and Expert Controllers Krishan Arora; Baljinder Singh
Bulletin of Electrical Engineering and Informatics Vol 1, No 4: December 2012
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/eei.v1i4.248

Abstract

Load-frequency control (LFC) is a part of the Automatic Generation Control (AGC) in power systems, the aim of which is to maintain the system frequency and tie line flow at their scheduled values during normal period in an interconnected system. This research paper is devoted to explore the interconnection of the load frequency control of  hydro power system and the thermal system. The thermal system is comprised with governor dead band, generation rate constraint and boiler dynamics where as the hydro system is comprised with generation rate constraint. The conventional PID controller does not have adequate control performance with the consideration of nonlinearities and boiler dynamics. To overcome this drawback, Genetic Algorithm helps in solving optimization problems by exploitation of random search. The aim of the proposed expert controller is to restore the frequency to its nominal value in the smallest possible time whenever there is any change in the load demand etc.
Design and Implementation of a Low Cost USB Duplicator Muhammad Usman Rashid; Zeashan Hameed Khan
Bulletin of Electrical Engineering and Informatics Vol 1, No 4: December 2012
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/eei.v1i4.249

Abstract

USB devices and flash disks are the most common storage device being used but very little work has been done on it at university project level. Considering the increasing capacity and popularity of USB flash disks, it is believed that in the near future they will replace CDs/DVDs and will be used as a primary storage medium. For this purpose, a USB flash disk duplicator will also be required just as a CD/DVD duplicator is required today. The aim of the present work is to develop a portable and stand-alone device capable of copying the contents of one USB flash disk/mass storage device to another USB flash drive without the use of an intermediary computer.
A Fuzzy Differential Evolution Scheduling Algorithm Based on Grid Fu Qiao; Guoyin Zhang
Bulletin of Electrical Engineering and Informatics Vol 1, No 4: December 2012
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/eei.v1i4.250

Abstract

Aim at the problem of tasks scheduling problem for grid computing based on fuzzy constraints, propose tasks scheduling model of grid computing about tasks scheduling problem. Using fuzzy AHP(analytic hierarchy process) processes fuzzy constraints weight value. Utilize the merit of differential evolutionary algorithm, that is, the algorithm don’t need objective function is continuous and differentiable. Propose fuzzy differential evolutionary algorithm, the algorithm can process tasks scheduling for grid computing based on fuzzy constraint. In the experiments, compare the proposed algorithm with the existing algorithms. the proposed algorithm is more favorable than the existing algorithm in term of reliability, security and drooped task numbers.

Page 13 of 291 | Total Record : 2901

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