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25,002 Article Results

Modelling and Analysis of the Simple Water Heater System

https://ijece.iaescore.com/index.php/IJECE/article/view/IJECE-I-1-07
Haresh A. Suthar , Jagrut J. Gadit
Modelling is nothing but converting physical information in to mathematical form. Mathematical model plays vital role for identification and analysis of the system. In this paper simple water heater system was taken as test bench. Considering system parameters mathematical model of first order with time delayed was derived. Model was simulated in the simulation tool MATLAB and systems response has been studied by changing various parameters like static gain, time constant, delay time and noise, for applied step input.Response of the simulated system was analysed and compare with the actual real time system parameters. Keywords: Modelling, Analysis, MATLAB, Water heater system.DOI:http://dx.doi.org/10.11591/ijece.v1i1.59
Volume: 1
Issue: 1
Page: 49-52
Publish at: 2011-09-27

Land Property Market Value Determination Database for Collateral Purpose (Case Study: PT. Bintang Dharma Hurip Pekanbaru)

https://ijece.iaescore.com/index.php/IJECE/article/view/IJECE-I-1-08
Qurrotul Aini , Bakri La Katjong , Vicy Adriani
PT. Bintang Dharma Hurip, as one of appraisal companies already has the land and residential data in Pekanbaru, many data were not stored in organized database, therefore made difficult and delayed tasks of valuer especially to determine the Reproduction Cost New (RCN). The problem would be resolved when researchers proposed a dynamic property database, calculated the market value of land and implementation fuzzy queries so the redundancy data and loss can be minimized. The purpose of the research was to obtain a reference database application of properties in Pekanbaru based on last two years survey by PT. Bintang Dharma Hurip. The development method of research used Rapid Application Development, which were consists of requirements, design, construct, and implementation phases. The application used Visual Basic 6.0 and Microsoft Access 2003 as database tools. The research result was a database application size 6 MB. The user’s application divided into three, which are inspector, valuer, and reviewer. In the implementation phase, the researcher asked three reviewers, two valuers and one inspector PT. Bintang Dharma Hurip to conduct tests on the application. Apparently, from the test results, researchers concluded that the application is running well and suitable with company’s needs. Keywords: database, fuzzy, property, market value, PT. Bintang Dharma Hurip.DOI:http://dx.doi.org/10.11591/ijece.v1i1.62
Volume: 1
Issue: 1
Page: 53-58
Publish at: 2011-09-27

Low Noise Amplifier at 5.8GHz with Cascode and Casc aded Techniques Using T-Matching Network for Wireless Ap plications

https://ijece.iaescore.com/index.php/IJECE/article/view/IJECE-I-1-01
Ibrahim A.B , Abdul Rani Othman , Hussain M.N , Othman A.R , Johal M.S
This project present a design of a 5.8 GHz low noise amplifier (LNA) design with cascode and cascaded techniques using T-matching network applicable for IEEE 802.16 standard. The amplifier use FHX76LP Low Noise SuperHEMT FET. The LNA designed used T-matching network consisting of lump element reactive element at the input and the output terminal. The cascode and cascaded low noise amplifier (LNA) produced gain of 36.8dB and noise figure (NF) at 1.3dB. The input reflection (S11) and output return loss (S22) are -11.4dB and -12.3dB respectively. The bandwidth of the amplifier is more than 1GHz. The input sensitivity is compliant with the IEEE 802.16 standards.DOI:http://dx.doi.org/10.11591/ijece.v1i1.63
Volume: 1
Issue: 1
Page: 1-8
Publish at: 2011-09-27

ACPTDF for Multi-transactions and ATC Determination in Deregulated Markets

https://ijece.iaescore.com/index.php/IJECE/article/view/IJECE-I-1-10
Ashwani Kumar Sharma , Jitendra Kumar
Abstract—Available transfer capability in the transmission network has become essential quantity to be declared well in advance for its commercial use in a competitive electricity market. Its fast computation using DC load flow based approach is used worldwide for on line implementation. Many authors have proposed the ATC calculation based on DC/AC load flow approach. In this paper, AC PTDF based approach has been proposed for multi-transaction cases using power transfer sensitivity and Jacobian calculated with three different methods. The methods can be implemented for any number of transactions occurring simultaneously. The results have been determined for intact and line contingency cases taking multi-transaction/simultaneous as well as single transaction cases. The main contributions of the paper are: (i) ATC determination for multi-transactions environment, (ii) ATC determination and comparison with three approaches of PTDF calculations, (iii) LODFs with line contingency cases for multi-transaction environment and thereby ATC determination. The results have also been obtained with DC method for comparison. The proposed method have been applied for IEEE 24 bus RTS. Keywords: Available transfer capability, AC load flow, AC power transfer distribution factors , line outage contingency, line outage distribution factors, multi-transactions, simultaneous transactions.DOI:http://dx.doi.org/10.11591/ijece.v1i1.61
Volume: 1
Issue: 1
Page: 71-84
Publish at: 2011-09-27

Solution of Dynamic Economic Load Dispatch (DELD) Problem With Valve Point Loading effects and Ramp rate limits Using PSO

https://ijece.iaescore.com/index.php/IJECE/article/view/IJECE-I-1-09
G. Sreenivasan
Dynamic economic load dispatch (DELD) is one of the major operational decisions in power system operation and control. It is a Dynamic problem due to dynamic nature of Power system and the large variation of load demand. This absolute problem is normally solved by discretisation of the entire dispatch period into a number of small time intervals over which the load is assumed to be constant and the system is considered to be in temporal steady state. This paper presents particle swarm optimization technique to solve the DELD problem for the determination of the global or near global optimum dispatch solution. To illustrate the effectiveness of the proposed approach, three test systems consisting of 5,10 and 15 generating units, with incorporation of load balance constraints, operating limits, valve point loading, ramp constraints and network lossesare considered and tested. The comparison of numerical results demonstrate the performance and applicability of the proposed method. Keywords: Dynamic economic load dispatch (DELD), Particle Swarm Optimization, Valve - point loading effect, Ramp Rate Limits.DOI:http://dx.doi.org/10.11591/ijece.v1i1.60
Volume: 1
Issue: 1
Page: 59-70
Publish at: 2011-09-27

Wavelet based Fault Detection Method for Ungrounded Power System with Balanced and Unbalanced load

https://ijece.iaescore.com/index.php/IJECE/article/view/IJECE-I-1-02
Vishwakumar Revanasiddappa Sheelavant , Vijaya C , S C Shiralashetti
Modern spectral and harmonic analysis is based on Fourier transforms. However, these techniques are less efficient in tracking the signal dynamics for transient disturbances. Consequently, the wavelet transform has been introduced as an adaptable technique for non-stationary signal analysis. Although the application of wavelets in the area of power system engineering is still relatively new, it is evolving very rapidly. In this paper wavelet based method for detection of faults in an ungrounded integrated power system (IPS) of Navy ships is proposed. However the “Virtual ground” exists between the modules of IPS and ship hull, because of insulation capacitance of the cable and the EMI filters between the modules of the IPS. The fault current is very low for a single line to ground fault in this ungrounded system allowing continuous operation but also making fault detection difficult. The proposed method uses wavelets for detection of ground fault in ungrounded power system. The ground fault conditions are simulated using MATLAB-SIMULINK and fault detection implemented with Daubechies wavelets. It is shown that transient ground faults can be detected by wavelet analysis of the line to line voltages when ship load is balanced and unbalanced. Verification of the proposed method has been done by simulating fault between a line and ship hull and analyzing the results.DOI:http://dx.doi.org/10.11591/ijece.v1i1.57
Volume: 1
Issue: 1
Page: 9-16
Publish at: 2011-09-26

Modelling and Analysis of Custom Power Device for Improve Power Quality

https://ijece.iaescore.com/index.php/IJECE/article/view/IJECE-I-1-06
Gurrala Madhusudhan Rao
Abstract: This paper describes the model and analyzes custom power devices for compensating voltage sag and swell conditions in three phase systems. Faults occurring in power distribution systems or facilities in plants cause the voltage sag or swell. If a fault occurs, it can damage the power system or user’s facility. Sensitivity to voltage sags and swells varies within different applications. For sensitive loads (PLC’s, paper mills etc.), even voltage sags of short duration can cause serious problems in the entire system. Normally, a voltage interruption triggers a protection device, which causes shutdown of the entire system. In order to mitigate power interruptions, this paper proposes a scheme for voltage sag support based on a pulse width modulated autotransformer. The proposed scheme is able to quickly recognize the voltage sag or swell condition, and it can correct the voltage by either boosting the input voltage during voltage sag events or reducing the voltage during swell events.DOI:http://dx.doi.org/10.11591/ijece.v1i1.41
Volume: 1
Issue: 1
Page: 43-48
Publish at: 2011-09-26

Control Strategy for Three Phase Shunt Active Power Filter with Minimum Current Measurements

https://ijece.iaescore.com/index.php/IJECE/article/view/IJECE-I-1-04
Y. Kusuma Latha , Ch. Saibabu , Y.P. Obulesh
The active power filter has been proved to be an effective method to mitigate harmonic currents generated by nonlinear loads as well as to compensate reactive power. The methods of harmonic current detection play a crucial part in the performance of active power filter (APF). This paper presents a new control strategy in which three Shunt Active Power filter Configurations aredeveloped in order to define new simple control algorithm which  requires minimum number of current measurements. The effecticeveness of the proposed control strategies are demonstrated through results. The entire control system is implemented with MATLAB/SIMULINK. The simulation results are presented for different control strategies and comparison is made among themDOI:http://dx.doi.org/10.11591/ijece.v1i1.23
Volume: 1
Issue: 1
Page: 31-42
Publish at: 2011-09-26

Comparison of Performance of SSSC and TCPS in Automatic Generation Control of Hydrothermal System Under Deregulated Scenario

https://ijece.iaescore.com/index.php/IJECE/article/view/IJECE-I-1-05
K Subbaramaiah , V.C. Jagan Mohan , V.C.Veera Reddy
This paper presents the modelling and simulation of Static Synchronous Series Compensator (SSSC) in a two area system for Automatic Generation Control (AGC) under deregulated environment. The modelling of Thyristor Controlled phase Shifter (TCPS) is also carried out and comparison is made between SSSC and TCPS. A two area hydrothermal system under deregulated environment has been considered for this purpose.  The devices are modeled and attempt has been made to incorporate these devices in the two area system thus improving the dynamic response of the system. The effect of these parameters on the system is demonstrated with the help of computer simulations. A systematic method has also been demonstrated for the modeling of this component in the system. Computer simulations reveal that due to the presence of SSSC along with TCPS, the dynamic performance of the system in terms of settling time, overshoot is greatly improved than that of without SSSC.DOI:http://dx.doi.org/10.11591/ijece.v1i1.21
Volume: 1
Issue: 1
Page: 21-30
Publish at: 2011-09-26

A Study of Gate Length and Source-Drain Bias on Electron Transport Properties in SiC Based MOSFETs Using Monte Carlo Method

https://ijece.iaescore.com/index.php/IJECE/article/view/IJECE-I-1-03
Hadi Arabshahi
Ensemble Monte Carlo simulations have been carried out to investigate the effects of Gate length and different source-drain bias on the characteristics of wurtzite SiC MOSFETs. Electronic states within the conduction band valleys are represented by non-parabolic ellipsoidal valleys centred on important symmetry points of the Brillouin zone. The following scattering mechanisims, i.e, impurity, polar optical phonon, acoustic phonon, alloy and piezoelectric are inculded in the calculation. Ionized imurity scattering has been treated beyound the Born approximation using the phase-shift analysis. Two transistors with gate lengths of 200 and 400 nm are simulated. Simulations show that with a fixed channel length, when the gate length is decreased, the output drain current is increased, and therefore the transistor transconductance increases. Moreover, with increasing temperature the drain current is reduced, which results in the reduced drain barrier lowering. The simulated device geometries and doping are matched to the nominal parameters described for the experimental structures as closely as possible, and the predicted drain current and other electrical characteristics for the simulated device show much closer agreement with the available experimental data.DOI:http://dx.doi.org/10.11591/ijece.v1i1.18
Volume: 1
Issue: 1
Page: 17-20
Publish at: 2011-09-26

An Early Detection Method of Type-2 Diabetes Mellitus in Public Hospital

10.12928/telkomnika.v9i2.699
Bayu Adhi; University of Sriwijaya Tama , Rodiyatul; University of Sriwijaya F. S. , Hermansyah; University of Sriwijaya Hermansyah
Diabetes is a chronic disease and major problem of morbidity and mortality in developing countries. The International Diabetes Federation estimates that 285 million people around the world have diabetes. This total is expected to rise to 438 million within 20 years. Type-2 diabetes mellitus (T2DM) is the most common type of diabetes and accounts for 90-95% of all diabetes. Detection of T2DM from various factors or symptoms became an issue which was not free from false presumptions accompanied by unpredictable effects. According to this context, data mining and machine learning could be used as an alternative way help us in knowledge discovery from data. We applied several learning methods, such as instance based learners, naive bayes, decision tree, support vector machines, and boosted algorithm acquire information from historical data of patient’s medical records of Mohammad Hoesin public hospital in Southern Sumatera. Rules are extracted from Decision tree to offer decision-making support through early detection of T2DM for clinicians. 
Volume: 9
Issue: 2
Page: 287-294
Publish at: 2011-08-01

A Parallel Energy-Sharing Control Strategy for Fuel Cell Hybrid Vehicle

10.12928/telkomnika.v9i2.708
Jenn Hwa; Universiti Teknologi Malaysia Wong , Tole; Universitas Ahmad Dahlan Sutikno , Nik Rumzi; Universiti Teknologi Malaysia Nik Idris , Makbul; University of Umm Al-Qura Anwari
This paper presents a parallel energy-sharing control strategy for the application of fuel cell hybrid vehicles (FCHVs). The hybrid source discussed consists of a fuel cells (FCs) generator and energy storage units (ESUs) which composed by the battery and ultracapacitor (UC) modules. A direct current (DC) bus is used to interface between the energy sources and the electric vehicles (EV) propulsion system (loads). Energy sources are connected to the DC bus using of power electronics converters. A total of six control loops are designed in the supervisory system in order to regulate the DC bus voltage, control of current flow and to monitor the state of charge (SOC) of each energy storage device at the same time. Proportional plus integral (PI) controllers are employed to regulate the output from each control loop referring to their reference signals. The proposed energy control system is simulated in MATLAB/Simulink environment. Results indicated that the proposed parallel energy-sharing control system is capable to provide a practical hybrid vehicle in respond to the vehicle traction response and avoids the FC and battery from overstressed at the same time. 
Volume: 9
Issue: 2
Page: 357-364
Publish at: 2011-08-01

Maximum Torque per Ampere Control of Permanent Magnet Synchronous Motor Using Genetic Algorithm

10.12928/telkomnika.v9i2.692
Farzad; Sharif University of Technology Tahami , Hamed; Malek Ashtar University of Technology Nademi , Mohammad; Malek Ashtar University of Technology Rezaei
 Permanent magnet synchronous motor (PMSM) drives have many advantages over other drives, i.e. high efficiency and high power density. Particularly, PMSMs are epoch-making and are intensively studied among researchers, scientists and engineers. This paper deals with a novel high performance controller based on genetic algorithm. The scheme allows the motor to be driven with maximum torque per ampere characteristic. In this paper assuming an appropriate fitness function, the optimum values for d-axis current of motor set points at each time are found and then applied to the controller. Simulation results show the successful operation of the proposed controller.
Volume: 9
Issue: 2
Page: 237-244
Publish at: 2011-08-01

Electronic Nose using Gas Chromatography Column and Quartz Crystal Microbalance

10.12928/telkomnika.v9i2.703
Muhammad; Institute of Technology Sepuluh Nopember Rivai , Djoko; Institute of Technology Sepuluh Nopember Purwanto , Hendro; Institute of Technology Sepuluh Nopember Juwono , Hari Agus; Institute of Technology Sepuluh Nopember Sujono
The conventional electronic nose usually consists of an array of dissimilar chemical sensors such as quartz crystal microbalance (QCM) combined with pattern recognition algorithm such as Neural network. Because of parallel processing, the system needs a huge number of sensors and circuits which may emerge complexity and inter-channel crosstalk problems. In this research, a new type of odor identification which combines between gas chromatography (GC) and electronic nose methods has been developed. The system consists of a GC column and a 10-MHz quartz crystal microbalance sensor producing a unique pattern for an odor in time domain. This method offers advantages of substantially reduced size, interferences and power consumption in comparison to existing odor identification system. Several odors of organic compounds were introduced to evaluate the selectivity of the system. Principle component analysis method was used to visualize the classification of each odor in two-dimensional space. This system could resolve common organic solvents, including molecules of different classes (aromatic from alcohols) as well as those within a particular class (methanol from ethanol) and also fuels (premium from pertamax). The neural network can be taught to recognize the odors tested in the experiment with identification rate of 85 %. It is therefore the system may take the place of human nose, especially for poisonous odor evaluations. 
Volume: 9
Issue: 2
Page: 319-326
Publish at: 2011-08-01

Energy Saving by Chopping off Peak Demand Using Day Light

10.12928/telkomnika.v9i2.712
Arindam Kumar; Jadavpur University Kolkata Sil , Nirmal Kumar; Jadavpur University Kolkata Deb , Ashok Kumar Maitra
An artificial intelligent technique has been implemented in this research using real time data’s to calculate how much energy can be chopped from peak load demand. The results are based on real time data that are taken from power delivering centers. These data’s do reflect the present condition of power and a solution to those critical conditions during the peak period. These are done in such a way such that helps in judicious scheduling of load. The time based load scheduling has been done so as to understand the basic criteria for solving power crisis during morning peak and early evening peak. The sunray availability and percentage of load that will use day light saving (DLS) technique has been taken into account in this work. The results shows that about 0.5% to 1% of load can be shedded off from the peak load period which otherwise is reduction of power. Thus it otherwise also means that an equivalent amount of energy is saved which amounts to a large saving of national money. This result is obtained on monthly and even daily basis. Thus this paper justifies DLS gives a new renewable technique to save energy. 
Volume: 9
Issue: 2
Page: 395-400
Publish at: 2011-08-01
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