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Intelligent Systems and Control (ISCO), 2013 7th International Conference on

Date 4-5 Jan. 2013

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  • [Front and back cover]

    Page(s): c1 - c4
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  • 7th International Conference on Intelligent Systems and Control (ISCO 2013) - title page

    Page(s): i
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  • [Title page]

    Page(s): ii
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  • [Copyright notice]

    Page(s): iii
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  • [Various messages]

    Page(s): v - ix
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  • Preface

    Page(s): xi
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  • Organizing committee

    Page(s): xiii - xvii
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  • Contents

    Page(s): xix - xxiv
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  • Simulation and design of closed loop controlled PFC Boost Converter with EMI Filter

    Page(s): 3 - 6
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    This paper deals with the simulation and implementation of Boost Power Factor Correction (PFC) Converter along with Electro Magnetic Interference (EMI) Filter. The Boost Converter of PFC Circuit is analyzed, designed and simulated with resistive load. Near unity power factor is obtained by using Boost PFC Converter with EMI Filter. The laboratory model is implemented and the experimental results are obtained. These experimental results are correlated with the simulation results. View full abstract»

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  • A case study on Power Quality issues in the Indian Railway traction sub-station

    Page(s): 7 - 12
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    The railway traction loads has more effect on power quality. Its effects on power quality cannot be ignored. The relevance of Power Quality (PQ) issue has recently augmented because of the increased use of power electronic equipments, which results in a voltage deviation and current waveforms. The performance and life expectancy of industrial electronics and electrical equipments is significantly affected by power supply anomalies caused by polluting loads at an industrial site and by utility normal operational activities. Hence railway traction loads have been taken as case study. Power quality issues have been studied by installing power quality monitoring system in traction sub-station1 and in traction sub-station2. In traction substation1, 2400 kVar rated capacitor alone is installed and where as in traction sub-station2, IGBT based DRPC (Dynamic Reactive Power Controller) with 1800 kVar is connected along with fixed 2400 kVar capacitor. The actual power quality issues of these traction sub stations were measured. The harmonics due to load currents, voltage and current unbalance measured are compared based on IEEE Standards 519-1992. View full abstract»

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  • Robust Power system stabilizer design for single machine infinite bus system with different membership functions for fuzzy logic controller

    Page(s): 13 - 19
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    This paper presents an evaluation of membership functions on a single machine infinite bus (SMIB) system with Power system stabilizers (PSSs). The PSS is added to excitation system to enhance the damping during low frequency oscillations. In this paper the system is analyzed for conventional PSS, fuzzy PSS and without PSS. This paper presents a study of fuzzy logic power system stabilizer (FPSS) for stability enhancement of a single machine infinite bus system. The speed deviation (Δω) and acceleration (Δϖ) of the rotor of synchronous generator are taken as the input to the fuzzy logic controller to improve small signal stability by improving damping. The effect of these variables on damping at the generator shaft mechanical oscillations is very significant. The stabilizing signals were computed using the different fuzzy membership functions. The general membership functions under consideration are triangular, trapezoidal, Gaussian, bell, sigmoidal and polynomial types. The performance of the fuzzy logic PSS with different membership functions is compared with the system Response without PSS and with Conventional PSS (CPSS). The simulation results obtained from the different plants over a wide range of operating conditions indicate the improved performance of FPSS over the CPSS by considering the triangular and Gaussian type of membership functions in the design of fuzzy logic controller. View full abstract»

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  • Elimination of selective harmonics in a Multi-Level Inverter

    Page(s): 20 - 25
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    This paper presents a selective harmonics elimination in Multi-Level Inverter. The basic concept of this reduction is to eliminate specific harmonics, which are generally of the lowest orders, with an appropriate choice of switching angles. This paper employs Homotopy algorithm to solve the transcendental equations for finding the switching angles. This method solves the non-linear transcendental equations with a much simpler formulation and without complex analytical calculations for any number of voltage levels. Also several informative simulation results verify the validity and effectiveness of the proposed algorithm. View full abstract»

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  • Multicriteria decision examination for electrical power grid monitoring system

    Page(s): 26 - 30
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1650 KB) |  | HTML iconHTML  

    Rough Set theory proposed by Z Pawlak is a great help for dealing with uncertain data and dominance based rough set is an extension to the classical rough set theory considering the preference order of the data. As because of the lot number of variables and high degree of uncertainty, the process of a grid's power monitoring and its system is quite complicated. In this paper, we have used dominance based rough set approach for investigation of electrical grid monitoring system, based upon which a grid operator will be able to take efficient and intelligent decisions. View full abstract»

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  • Placement of STATCOM in a wind integrated power system with storage for improving the loadability of the system

    Page(s): 31 - 35
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    Voltage instability is a major issue that attracts worldwide interest because of its consequence of voltage collapses. These days power systems operate closer to their stability limits, transferring large amounts of powers from long distance and an inadequate supply of reactive power contribute to system voltage instability and eventually lead to voltage collapse. So estimating the margin in the loadability of the power system is essential in the real time system for voltage stability assessment. This paper investigates the enhancement of voltage stability using Static Compensator (STATCOM) in a wind integrated power system with storage. Wind energy is gaining the most interest among a variety of renewable energy resources and this requires energy storage because it is necessary to get a smooth output from a wind turbine. A battery energy storage system is connected to the system which enhances the voltage levels in weak buses. The combined action of battery storage and STATCOM enhances the voltage stability of the entire system. The analysis is done with power system analysis toolbox (PSAT), a powerful toolbox in MATLAB for power system analysis. View full abstract»

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  • Identification of Doubly Fed Induction Generator based Wind Energy Conversion System using piecewise-linear Hammerstein Wiener model

    Page(s): 36 - 43
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    The aim of this paper is to present a piecewise-linear Hammerstein Wiener model for the identification of variable speed Wind Energy Conversion System driven by Doubly Fed Induction Generator (DFIG). The subsystems of the wind energy conversion systems are identified individually using non linear system identification technique. The complete wind energy conversion system is modeled in matlab simulink environment and its properties are analyzed. The model is developed such that it can be suited for all types of induction generator configurations and it can also be used to study the steady state and transient state performances of Wind energy conversion system. View full abstract»

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  • Product design using theory of innovation and problem solving (TRIZ) technology for induction machine

    Page(s): 44 - 48
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1277 KB) |  | HTML iconHTML  

    TRIZ is the design technology that innovates and finds out a solution for problem solving in any engineering disciplines. This innovation method not only focuses on only problems with past and present condition but also focuses on the future condition of the system also. This paper proposes the TRIZ system for Innovation in submersible pump system especially when they are used in series and parallel operations required for drainage and large irrigation purposes. Current system when used in such condition requires a lot of time and large manpower especially when removing and reinstalling the systems. It also conserves large time and reduces the efficiency for another operation. Thus the application of submersible pump can be extended to different situations in our country with technology upgradationy using the theory of Innovation and problem solving technology, TRIZ. View full abstract»

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  • An adaptive calibration circuit for RTD using optimized ANN

    Page(s): 49 - 54
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    Design of an adaptive calibration circuit for temperature measurement using RTD with an optimized Artificial Neural Network (ANN) is reported in this paper. The objectives of the present work are: (i) to extend the linearity range of measurement to 100% of full scale input range, (ii) to make the measurement technique adaptive to variations in reference resistance, and temperature coefficient, and (iii) to achieve objectives (i) and (ii) using an optimized neural network. Optimized neural network model is designed with various algorithms, and transfer function of neuron considering a particular scheme. The output of RTD is resistance. It is converted to voltage by using a suitable data conversion unit. A suitable optimal ANN is added in place of conventional calibration circuit. ANN is trained with simulated data considering variations in reference resistance and temperature coefficient to achieve desired objectives from proposed technique. Results show that the proposed technique has fulfilled the objectives. View full abstract»

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  • An efficient bridgeless power factor correction boost converter

    Page(s): 55 - 59
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    Dc power supplies are extensively used inside most of electrical and electronic appliances such as in computers, televisions, audio sets and others. In this paper a bridgeless power factor correction boost converter is proposed which results in improved power factor and reduced harmonics content in input line currents as compared to conventional boost converter topology. Bridgeless power factor correction boost converter eliminates the line-voltage bridge rectifier in conventional boost power factor correction converter, so that the conduction loss is reduced. A good tradeoff between efficiency, dc bus capacitor voltage stress, and harmonic content can be achieved by properly tuning the converter parameters. View full abstract»

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  • Fault injection capable synchronous generator for condition based maintenance

    Page(s): 60 - 64
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    This paper presents the design specifications of an experimental setup capable of injecting faults in a synchronous generator to develop and test algorithms for condition based maintenance of aerospace applications. A 3 kVA alternator is designed to inject faults in the stator winding and field windings. The system is capable of injecting open and short circuit faults in the stator and rotor windings using a fault injection unit and record current, voltage and vibration signals from the respective sensors, with programming capability. The response of the synchronous generator during normal condition and faulty condition are discussed. The work reported in this paper will help other researchers develop low cost experimental facility to pursue research in machine condition monitoring. View full abstract»

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  • Analysis and effect of switching frequency and voltage levels on total harmonic distortion in multilevel inverters fed BLDC drive

    Page(s): 65 - 71
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    Multilevel converter technology has emerged as a very important alternative in the area of high-power medium-voltage energy control. Several topologies for multilevel inverters have been proposed over the years, the most popular cascaded H-bridge apart from other multilevel inverters is the capability of utilizing different dc voltages on the individual H-bridge cells which results in splitting the power conversion amongst higher-voltage lower-frequency and lower-voltage higher-frequency inverters. Considering the cascaded inverter to be one unit, it can be seen that a higher number of voltage levels are available for a given number of semiconductor devices. In this paper multilevel converter with different voltage levels are considered and simulation results are presented in terms of total harmonic distortion (THD). Finally generalized expression for highest order harmonic based on switching frequency and number of levels is derived and fed to BLDC drive. View full abstract»

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  • Feature space reduction in ethnically diverse Malaysian English accents classification

    Page(s): 72 - 78
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1110 KB) |  | HTML iconHTML  

    In this paper we propose a reduced dimensional space of statistical descriptors of mel-bands spectral energy (MBSE) vectors for accent classification of Malaysian English (MalE) speakers caused by diverse ethnics. Principle component analysis (PCA) with eigenvector decomposition approach was utilized to project this high-dimensional dataset into uncorrelated space through the interesting covariance structure of a set of variables. This delimitates the size of feature vector necessary for good classification task once significant coordinate system is revealed. The objectives of this paper have three-fold. Firstly, to generate reduced size feature vector in order to decrease the memory requirement and the computational time. Secondly, to improve the classification accuracy. Thirdly, to replace the state-of-the-art mel-frequency cepstral coefficients (MFCC) method that is more susceptible to noisy environment. The system was designed using K-nearest neighbors algorithm and evaluated on 20% independent test dataset. The proposed PCA-transformed mel-bands spectral energy (PCA-MBSE) on MalE database has proven to be more efficient in terms of space and robust over the baselines MFCC and MBSE. PCA-MBSE achieved the same accuracy as the original MBSE at 66.67% reduced feature vector and tested to be superiorly robust under various noisy conditions with only 10.48% drop in the performance as compared to 16.81% and 48.01% using MBSE and MFCC respectively. View full abstract»

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  • Synthesized Direct Torque Control for high-power induction motor drive

    Page(s): 79 - 83
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    Direct Torque Control with Multilevel Inverter (DTC-MLI) has emerged recently in high dynamics AC drives fields for induction machines or permanent magnet machines application. Direct Torque Control (DTC) has the characters such as combined simplicity and robustness with excellent performance of torque control for the drive system. This paper presents the implementation of a high performance Direct Torque Control (DTC) of Induction Motor (IM) based on three level inverter drive. The paper shows the evaluation of a Three-level Neutral Point Clamped inverter is used as drive system for high power application. The existing inverter drive achieve better efficiency than conventional two-level drive, but lags in achieving better efficiency due to high dv/dt and neutral point unbalanced condition. This issue is solved by synthesizing the vectors. This is better verified through simulated work done in Matlab. View full abstract»

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  • Silhouette analysis—“The waste of Koyambedu to electricity of Chennai” the future power generation: An outlook

    Page(s): 84 - 89
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    This paper presents and critically analyses the accumulation of solid organic waste and its management in a sustainable way to reduce the risk to human health, environmental burden and maintain ecosystem. This review focuses on the process of anaerobic digestion which is considered to be viable options for recycling the organic fraction of solid waste. Biogas and other energy rich compounds obtained from such resources with microbes such as bacteria, fungi and archaea is increasing the twin objectives of resource recycling and pollution mitigation and will meet the world's ever increasing energy requirements in future. In view of the inherent characteristics of vegetable market wastes, Biomethanation is seemed top be a lucrative process for Bio-energy generation and manure production in recent years under Waste-to-Energy programme. A demonstration plant of capacity 30 tonnes per day was established for Biomethanation of vegetable market waste at Koyambedu Chennai, has been taken into study. As a part of recent developments in the implementation of Kyoto Protocol for reduction of Green House Gas (GHG) emissions into atmosphere, majority of waste to energy, biomass based bio-energy projects are nourishing for implementation of Clean Development Mechanism (CDM) in many parts of the world. The present paper delineates the performance of the plant in terms of methane gas production considering the seasonal variations in the wastes availability in Biomethanation of vegetable market waste with special reference to Indian scenario. View full abstract»

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  • Monitoring and control of a PLC based VFD fed three phase induction motor for powder compacting press machine

    Page(s): 90 - 92
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    The implementation of a monitoring and control of a variable frequency drive (VFD) fed three phase induction motor (IM) using programmable logic controller (PLC) technology for a powder compacting hydraulic press (HP) machine is described. The PLC co-ordinate the operational parameters such as ram down, ram dawdling, ram clasp and ram up in HP machine, during the operation. Typical techniques for three phases IM are commonly provided by mechanical and electrical equipments, but it has many limitations of stator insulation failures and reduces the life and efficiency of the system. In this proposed method, new control method based on the PLC has been introduced. The HP machine Solenoid valves are controlled using PLC as per the operation cycle. The efficiency of a PLC control is increased at variable speeds and thus increases the power consumption. Thus, the PLC proves as a resourceful and effective tool for controlling industrial electric drives. View full abstract»

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  • Design of nonlinear state feedback control law for underactuated TORA system: A block backstepping approach

    Page(s): 93 - 98
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    This paper presents the formulation of a novel block-backstepping based control algorithm to address the stabilization problem for the well-known nonlinear benchmark TORA system. The ideas behind the method are as follows. At first, state model of the TORA system has been converted into block-strict feedback form. Then the control Lyapunov function has been designed for each cascaded dynamic block to derive the expression of the control input for the overall nonlinear system. The overall asymptotic stability of the TORA system has been analyzed using Lyapunov Stability Criteria. Finally, the effectiveness of the proposed control algorithm has been verified in the simulation environment. View full abstract»

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