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25,002 Article Results

A Decoupled Parameters Estimators for in Nonlinear Systems Fault diagnosis by ANFIS

https://ijece.iaescore.com/index.php/IJECE/article/view/5384
Bellali Badre , A. Hazzab , I. K. Bousserhane , Dimitri lefebvre
This paper presents a new and efficient Adaptive Neural Fuzzy Inference Systems approach for satellite’s attitude control systems (ACSs) fault diagnosis. The proposed approach formulates the fault modelling problem of system component into an on-line parameters estimation The learning  ability of the adaptive neural fuzzy inference system allow as to decoupling the effect of each fault from the estimation of the others.  Our solution provides a method to detect, isolate, and estimate various faults in system components, using Adaptive Fuzzy Inference Systems Parameter Estimators (ANFISPEs) that are designed and based on parameterizations related to each class of fault. Each ANFISPE estimates the corresponding unknown Fault Parameter (FP) that is further used for fault detection, isolation and identification purposes. Simulation results reveal the effectiveness of the developed FDI scheme of an ACSs actuators of a 3-axis stabilized satellite.DOI:http://dx.doi.org/10.11591/ijece.v2i2.221
Volume: 2
Issue: 2
Page: 166-174
Publish at: 2011-12-30

Dense Wavelength Division Multiplexing Optical Network System

https://ijece.iaescore.com/index.php/IJECE/article/view/5389
Md. Masud Rana , Muhammad Abdul Goffar Khan
In this paper, a dense wavelength division multiplexing (DWDM) system with 64 modulated channels 50 GHz spacing covering 25.2-nm bandwidth has been demonstrated. When optical signals are to travel over long distances, it’s be faded and spread out. So, it is necessary to strengthen the signal at intervals. To keep the signal strength at same level in the DWMD system, Er-doped fiber amplifier (EDFA) has been used. The EDFA provides a gain across the bandwidth with 10 dB average gain and a gain shape variation peak-to-peak of about 1 dB. OptSim’s physical EDFA model has been used for DWMD systems.DOI:http://dx.doi.org/10.11591/ijece.v2i2.202
Volume: 2
Issue: 2
Page: 203-206
Publish at: 2011-12-30

Transforming Model to Meta Model for Knowledge Repository of Malay Intangible Culture Heritage of Malaysia

https://ijece.iaescore.com/index.php/IJECE/article/view/5393
Radiah Amin
Intangible Culture Heritage is very important as national treasure for a country since it is a part of identity of the country. Rapid technology changed and globalization is one of the reasons why new generation less interested to involve in culture heritage sector. Without any drastic action to safeguard Intangible Culture Heritage for the country it will cause endanger to disappearance. In this study researcher introduce a model of factors that contributing in archiving Intangible Culture Heritage. By transform from the model to meta model it will be a guidelines, standard and base for developing a repository of Intangible Culture Heritage. The finding for this research is a vital and very fruitful for intangible study and archiving and also as a main contribution for this study.DOI:http://dx.doi.org/10.11591/ijece.v2i2.205
Volume: 2
Issue: 2
Page: 231-238
Publish at: 2011-12-30

Power Generation Pricing Model Based on Long Rung Marginal Cost Methodology

https://ijece.iaescore.com/index.php/IJECE/article/view/5382
Priyanka Roy , Abhijit Chakrabarti
This paper proposes a long run marginal cost based formulation for reflecting the usage based pricing of electrical power. The aim of this paper is to develop a novel method that can price the real power on a long term basis in a multi-machine power system. The proposed method has shown that the cost of future investment is governed by the perturbation of generating power.  The economic efficiency of the proposed model is demonstrated in a 203 buses 267 lines 23 machines real power system of eastern part of India where total 23 generators are categorized in 5 types according to their ratings and analyzed the price at their optimal operating condition with 10% loading variation.DOI:http://dx.doi.org/10.11591/ijece.v2i2.191
Volume: 2
Issue: 2
Page: 155-158
Publish at: 2011-12-30

Dynamic Response of a Grid Connected Wind Farm with Different Types of Generators

https://ijpeds.iaescore.com/index.php/IJPEDS/article/view/4887
Helmy Mohammed El_ Zoghby , S.M. Sharaf
For a wide areas wind farm, which composed of different zones of different wind turbines and different generators , this paper aims to simulate  a wind farm model that icludes  a wind turbine and three different  types of generators , which are three phase synchronous generator, three phase squirrel-cage induction generator and three phase doubly-fed induction generator ,these generators are the main machines that generally used in the field of wind energy generation.  All generators are connected in parallel at the point of common coupling (pcc)  and connected to the utility grid . This model is a simple representation of the actual  model of  zafarana  wind farm,  which is the biggest wind farm in Egypt and further to use it in different kinds of simulations, and display the difference in response among all generators, where all generators are  500 kw power rating , and subjected to the same operating conditions .After modeling the system, the transient response of the system will be studied and analyzed at different operating cases as:Case.1 constant wind speed operationCase.2 variable wind speed operationCase.3 sudden change in turbine mechanical powerCase.4 sudden change in wind speed.So this paper introduces a survey on the dynamic response of a large wind farm of different generators at different operating conditions  Keywords: modeling, synchronous generator, induction generator, wind farm, simulation model, transient analysis.DOI: http://dx.doi.org/10.11591/ijpeds.v2i1.175
Volume: 2
Issue: 1
Page: 85-98
Publish at: 2011-12-14

ANN Controlled VSC with Harmonic Reduction for VAR Control of Transmission Line

https://ijpeds.iaescore.com/index.php/IJPEDS/article/view/4886
Ram Shankarrao Dhekekar , N V Srikanth
Complete close-loop smooth control of reactive power can be achieved using shunt connected FACTS devices. STATCOM is one of the shunt connected FACTS device which can be utilized for the purpose of reactive power compensation. Intelligent FACTS devices make them adaptable and hence it is emerging in the present state of art. This paper presents close loop control techniques based on artificial neural networks (ANNs) to control reactive power generated by long transmission line over wide range so as to maintain constant voltage profile at the receiving end. With ANN technique and H-bridge multilevel VSC topology harmonics are eliminated to accepted level. A 9-Level H-Bridge VSC based STATCOM is used to handle the reactive power of the line .The close loop control is achieved by PI and neural network. . This paper is about real time simulation and implementation of PI controlled VSC STATCOM for 750km lab model of artificial transmission line. PI controller and neural network control schemes implemented and investigated. With Matlab simulation and actual testing proves that these devices when installed, they keep the bus voltage same as reference voltage (sending-end voltage). The results are prominent and give a way for real-time implementation of the proposed control schemes. These control schemes are simulated for the real-time control along with real-time modeling and simulations. Relative Harmonic analysis, for both the schemes are discussed. The results are prominent and give a way for real-time implementation.DOI: http://dx.doi.org/10.11591/ijpeds.v2i1.206
Volume: 2
Issue: 1
Page: 76-84
Publish at: 2011-12-14

Automatic Generation Control in Multi Area Interconnected Power System by using HVDC Links

https://ijpeds.iaescore.com/index.php/IJPEDS/article/view/4885
Yogendra Arya , Narendra Kumar , Hitesh Dutt Mathur
This paper investigates the effects of HVDC link in parallel with HVAC link on automatic generation control (AGC) problem for a multi-area power system taking into consideration system parameter variations. A fuzzy logic controller is proposed for four area power system interconnected via parallel HVAC/HVDC transmission link which is also referred as asynchronous tie-lines. The linear model of HVAC/HVDC link is developed and the system responses to sudden load change are studied. The simulation studies are carried out for a four area interconnected thermal power system. Suitable solution for automatic generation control problem of four area electrical power system is obtained by means of improving the dynamic performance of power system under study. Robustness of controller is also checked by varying parameters. Simulation results indicate that the scheme works well. The dynamic analyses have been done with and without HVDC link using fuzzy logic controller in Matlab-Simulink. Further a comparison between the two is presented and it has been shown that the performance of the proposed scheme is superior in terms of overshoot and settling time.DOI: http://dx.doi.org/10.11591/ijpeds.v2i1.182
Volume: 2
Issue: 1
Page: 67-75
Publish at: 2011-12-14

Torque Analysis of Permanent Magnet Hybrid Stepper Motor using Finite Element Method for Different Design Topologies

https://ijpeds.iaescore.com/index.php/IJPEDS/article/view/4889
E.V.C Sekhara Rao , P.V.N Prasad
This paper discusses about permanent magnet hybrid stepper motor magnetic circuit using finite element model for different geometric designs like uniform air-gap, non uniform air-gap, for different air-gap lengths, different tooth pitches and extra teeth on stator using PDE toolbox of Matlab at different current densities. Implementing these results in equivalent circuit model (permeance model), motor performance is analyzed for an existing motor for steady state conditions. These results suggest modifications for better performance of the PMH stepper motor like reduction of cogging torque and improvement in steady state torque with minimum THD.DOI: http://dx.doi.org/10.11591/ijpeds.v2i1.140
Volume: 2
Issue: 1
Page: 107-116
Publish at: 2011-12-14

Design of Robust Power System Stabilizer Considering Less Control Energy

https://ijpeds.iaescore.com/index.php/IJPEDS/article/view/4888
Cuk Supriyadi Ali Nandar
This paper proposes design a robust power system stabilizer (PSS) considering less control energy using a genetic algorithm (GA). The structure of proposed PSS is a 1st-order lead-lag compensator, it is easy to implement in power system utility. In the design, system uncertainties are modeled by an inverse additive uncertainty. The performance, robust stability condition, and less control energy of the designed system are formulated as the objective function in the optimization problem. The GA is applied to solve an optimization problem and to achieve control parameters of proposed PSS. The performance and robustness against system uncertainties of the proposed PSS are investigated in the single-machine infinite bus system in comparison with a conventional PSS and a PSS designed by fixed-structure H∞ loop shaping. Simulation results show that with less control energy, the robustness and damping effect of the proposed PSS can be guaranteed against various operating conditions.Keywords: Control system design, operation and control of power systems, robust control application, less control energyDOI: http://dx.doi.org/10.11591/ijpeds.v2i1.143
Volume: 2
Issue: 1
Page: 99-106
Publish at: 2011-12-14

Dynamically Reconfigurable Control Struture for Three Phase Induction Motor Drives

https://ijpeds.iaescore.com/index.php/IJPEDS/article/view/4883
Rajendran Ramasamy , Dr N Devarajan
Field Programmable Gate Arrays (FPGAs) are a suitable hardware platform for the industrial control systems. These dynamically reconfigurable FPGAs can be used as an alternative digital solution to conventional microcontrollers and DSPs to ensure fast operation. This paper presents the feasibility of embedding the Direct Torque Control with Space Vector Modulation (DTC-SVM) of an induction motor into FPGA.The DTC-SVM of induction motor drives is simulated in a Matlab/Simulink environment using a Xilinx System Generator.DOI: http://dx.doi.org/10.11591/ijpeds.v2i1.183
Volume: 2
Issue: 1
Page: 43-50
Publish at: 2011-12-08

Voltage Tracking of a DC-DC Flyback Converter Using Neural Network Control

https://ijpeds.iaescore.com/index.php/IJPEDS/article/view/4882
Wahyu Mulyo Utomo , Sim Sy Yi , Yonis M.Y. Buswig , Afarul Abu Bakar , Md Zarafi Ahmad
This paper proposes a neural network control scheme of a DC-DC Flyback converter that will step up a 12V DC and applied it on brushless DC motor with 12 and 24V dc. In this technique, a back propagation learning algorithm is derived. The controller is designed to track the output voltage of the DC-DC converter and to improve performance of the Flyback converter during transient operations. Furthermore, to investigate the effectiveness of the proposed controller, some operations such as starting-up and reference voltage variations are verified. The numerical simulation results show that the proposed controller has a better performance compare to the conventional PI-Controller method.DOI: http://dx.doi.org/10.11591/ijpeds.v2i1.154
Volume: 2
Issue: 1
Page: 35-42
Publish at: 2011-12-08

Variable Voltage Source Inverter with controlled frequency spectrum based on Random Pulse Width Modulation

https://ijpeds.iaescore.com/index.php/IJPEDS/article/view/4881
Muhammad Farrukh Yaqub , Muhammad Safian Adeel , Tahir Izhar
This paper presents a new method for single phase variable voltage inverter based on Random Pulse Width Modulation. In Random Pulse Width Modulation based inverter, the frequency spectrum of the output current and voltage waveforms becomes continuous because of the randomization of the switching function of the devices controlling the output voltages. This paper establishes a theory that if the distributions of the random numbers generated by the random source are kept within certain limit with respect to the peak value of reference sinusoidal waveform, the frequency spectrum can be controlled. On the basis of the results, a novel drive using variable tap changing transformer (optional) and adaptive random number generator, to control the ratio between the numbers generated by the random source and the reference waveform has been suggested that will guarantee a better power quality profile for a broad range of output voltages.DOI: http://dx.doi.org/10.11591/ijpeds.v2i1.150
Volume: 2
Issue: 1
Page: 25-34
Publish at: 2011-12-08

Review of Static Compensation of Autonomous Systems

https://ijpeds.iaescore.com/index.php/IJPEDS/article/view/4884
Ambarnath Banerji , Sujit K. Biswas , Bhim Singh
Deregulation of the electric power energy market has thrown open opportunities for tapping the large number of small pockets of renewable energy sources with the asynchronous generators. Whether the power is supplied by asynchronous generator or by the grid at the remote location, its quality has become an important aspect for consumers of electricity. Efforts have been made to improve the power quality using passive filters, active filters and the new concept of Custom Power. Use of Custom power devices ensures that a load do not pollute the power supply of the other loads. One such custom power device is the DSTATCOM (Distribution Static Compensator) which is connected in shunt at the load end. The heart of the DSTATCOM is an inverter. The focus on the autonomous generation has increased in the recent years. The paper presents a comprehensive review of the DSTATCOM used for autonomous generation. It is aimed at providing a broad perspective on the status of DSTATCOM, used with Asynchronous generators, vis-à-vis its working principle, topology, solid state switching devices and technology, supply system, control methodologies and approaches, technical and economic considerations, etc. to researchers and application engineers dealing with power quality aspects of Autonomous Systems. Classified manner in which the references are presented in this paper will serve them as quick and useful reference.DOI: http://dx.doi.org/10.11591/ijpeds.v2i1.174
Volume: 2
Issue: 1
Page: 51-66
Publish at: 2011-12-08

Simulation of ZVS Converter and Analysis of Its Switching Loss Based on PSPICE

https://ijpeds.iaescore.com/index.php/IJPEDS/article/view/4880
Wang Xiaoyuan , Yang Zhe
The working principle of Zero Voltage Switch (ZVS) inverter is presented in this paper. Simulations of the model are carried out with PSPICE. The loss of the inverter is analyzed with taking the actual situation into consideration. It is worthiness to practical engineering application.DOI: http://dx.doi.org/10.11591/ijpeds.v2i1.170
Volume: 2
Issue: 1
Page: 19-24
Publish at: 2011-12-08

Modeling & Simulation of Fuel cell (Choi Model) based 3-Phase Voltage Source Inverter

https://ijpeds.iaescore.com/index.php/IJPEDS/article/view/4876
Gaurav Sachdeva
In the present work, performance of three phase voltage source inverter, while feeding different power factor loads, has been investigated. Fuel cells models namely Choi model are used in input side as a DC source while dynamic load have been used at the output side. Dynamic load used is induction motor (IM). Performance of IM has been investigated under various loading conditions. ANN based control strategy has been proposed to find the conduction angle of a Three Phase VSI and verified for IM load. Simulations have been performed using PSIM 7.0.5 and MATLAB 7.0.4.DOI : http://dx.doi.org/10.11591/ijpeds.v1i2.109
Volume: 1
Issue: 2
Page: 175-178
Publish at: 2011-12-01
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