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VOLUME 2, ISSUE 9, SEPTEMBER 2014
Design and Simulation of Pipelined Radix-2k Feed-Forward FFT Architectures
T.S. GHOUSE BASHA, PEERLA SABEENA SULTHANA
Design and Implementation Of IMC Based PID Controller for Conical Tank Level Control Process
RAJESH.T, ARUN JAYAKAR.S, SIDDHARTH.S.G
Design and Evolution of Performance of Spread Spectrum Technqiues for Image Steganography Using MIGLS
T.S. GHOUSE BASHA, SYED HASHIMA ZABEEN
Low-Transition Test Pattern Generation for Minimizing Test Power in VlSI Circuits Using BIST Technique
PRAVEEN J, MN. SHANMUKHASWAMY
An Overview on Performance Improvement of an Induction Motors (IM) – A Review
VIJAYAKUMAR. R, M P MOHANDASS, ANGELINE SREEJA. S
Design of Optimal Degaussing Electronics for Ring Laser Gyroscope
CHELLI ASHOK, P.DHANA LAKSHMI, K.C.DAS
Development of Miniature Wind-Solar Hybrid Power Generating System and Monitoring of Parameters with NI USB-6009 DAQ
MOHD. ABDUL MUQEET, FAHMEEDA BEGUM, SYED FOUZAN ISHAQUI
Performance of a Virtual Conductor in Dc Power Systems Using a Controlled Bidirectional DC-DC Converter
HUSAM A. RAMADAN, YASUTAKA IMAMURA, SIHUN YANG, MASAHITO SHOYAMA
A new approach for somnolence detection & analysis based on LabVIEW
SIMRANJEET SINGH, DR.NAVEEN DHILLON, PROF.KARAMJEET SINGH
Harmonic Mitigation in Various Levels of Multilevel Inverter with Different Loads
P.TAMILVANI AND K.R.VALLUVAN
An Improved Technique for Complex SAR Image Compression Based on FFT and Discrete Wavelet Transform
GOPAL K. PATIDAR, KRISHNA PATIDAR, SWAPNA PILLAI, TARWAR S.SAVNER, M.CHIRANJEEVI
Design & Implementation of Wireless Sensor Node for Measurement of Conducting Liquid
MR. AMOL ASHOK KSHIRSAGAR, MR. SHASHIKANT HIPPARGI
Mitigating Handover Complexity in Wimax Network by Using Femtocell
DR.T.V.P.SUNDARARAJAN, DR.S.M.RAMESH, SAKTHISUDHAN, GOWDHAMI.N
Performance Analysis of Two-Level Space Vector Pulse Width Modulated Three Phase Voltage Source Inverters In All Possible Switching Sequences
S.MANIVANNAN, S.VEERAKUMAR, P.KARUPPUSAMY, A.NANDHAKUMAR
Comparing USB Data Acquisition Instruments Using Arduino and PIC18F4550 in LabVIEW and Matlab
ELĂŤAS V. BEAUCHAMP, DR. ELIO LOZANO
Design and Implementation of Sensor for Noncontact Sensing of Liquid
MR. AMOL ASHOK KSHIRSAGAR, MR. SHASHIKANT HIPPARGI
Transformation of ATM into Safe, Secure and Smart ATM
S.GANESH KUMARAN, DR. S.SINGARAVELU, C.PRIYA, DR.T.S.SIVAKUMARAN
Performance Analysis of Feedforward Adaptive Noise Canceller Using Nfxlms Algorithm
ADI NARAYANA BUDATI, B.BHASKARA RAO
A Simulated Assessment of Loading Effect on Buck-Boost Converters used in Maximum Power Point Tracking of Photovoltaic Systems
BARNAM JYOTI SAHARIA, BANI KANTATALUKDAR
Dynamic Simulation of Grid Tied PV-Inverter Under Distorted Grid Voltage
S.LENIN PRAKASH, A.STANLEY JESUDAIYAN, M.ARUTCHELVI
A Theoretical Study of Performance and Design Constraints of Non-Isolated Dc-Dc Converters
BARNAM JYOTI SAHARIA
Abstract
Design and Simulation of Pipelined Radix-2k Feed-Forward FFT Architectures
T.S. GHOUSE BASHA, PEERLA SABEENA SULTHANA
Abstract: It is vital to develop a superior FFT processor to satisfy the necessities of real time and low price in several different systems. This paper discusses about the design of FFT processor using VHDL. Here we simulated the 64- point FFT processor with radix-4 in VHDL code using ModelSIM 6.5e and the synthesis was performed using Xilinx ISE 8.1i. The architectures of 32 point FFT with radix-2 and 64-point FFT with radix-4are shown in this paper. Finally the simulation graphs of pipelined 64-point FFT processor are generated.
Keywords: FFT, Radix-2, Radix-4, Pipelined architecture.
Keywords: FFT, Radix-2, Radix-4, Pipelined architecture.
Abstract
Design and Implementation Of IMC Based PID Controller for Conical Tank Level Control Process
RAJESH.T, ARUN JAYAKAR.S, SIDDHARTH.S.G
Abstract: The level control of non-linear tanks (conical, spherical, etc) is the immense challenge in process control and it cannot be effectively controlled by means of conventional linear P+I+D controller. Hence an attempt is made in this paper as Internal Model Based PID controller design for conical tank level control. For each stable operating point, a first order process model was identified using process reaction curve method. The real time implementation is done in simulink using MATLAB. The experimental results shows that proposed control scheme have good set point tracking and disturbance rejection capability.
Keywords: IMC;PID;CONICALTANK,LEVEL,MATLAB
Keywords: IMC;PID;CONICALTANK,LEVEL,MATLAB
Abstract
Design and Evolution of Performance of Spread Spectrum Technqiues for Image Steganography Using MIGLS
T.S. GHOUSE BASHA, SYED HASHIMA ZABEEN
Abstract: The rapid development of technology made it easier to send the data accurate and faster to the destination. The most important factor of information technology and communication is the security of the information. This security can be achieved through steganography. Steganography is art and science of invisible communication. This paper mainly focus on audio and video steganography. Video Steganography hides secret data within a video and audio steganography deals with hiding secret data within audio. The secret data is first compressed, encrypted and then embed into the cover frames in such a way that eight bits of the secret data are divided into 2, 2, 2, 2 and then embedded into the RGB (Red, Green, Blue) pixel values of the cover frames respectively and the remaining 2 bits are inserted in the next pixel of cover frame and so on. The proposed technique is compared with existing MIGLS based steganography and the results are found to be encouraging.
Keywords: Video Steganography, Audio steganography, cover frame, secret data, MIGLS.
Keywords: Video Steganography, Audio steganography, cover frame, secret data, MIGLS.
Abstract
Low-Transition Test Pattern Generation for Minimizing Test Power in VlSI Circuits Using BIST Technique
PRAVEEN J, MN. SHANMUKHASWAMY
Abstract: Any Integrated circuit (IC) manufactured by the semiconductor manufacturing company contains test circuit and the circuit under test (CUT). The test circuit is used to test the correct functionality of the CUT and which is called Built In Self Test (BIST). This Built In Self Test used to generate test vectors which are applied to the circuit under test by inbuilt chip within an integrated circuit. In pseudorandom BIST design, the test vectors are generated in random style by Linear Feedback Shift Registers (LFSR). The main drawback of these conventional LFSRs is, it generates normally a number of random natured test vectors for testing the CUT in which many are repeated vectors and application of which unnecessarily increase the test power without contributing much to the fault coverage also the bulkiness of the CUT increases.
This paper presents a new approach, called Low Power -Bit complement test vector generation technique (LP-BCTVG). In LP-BCTVG technique, the output bits are complemented due to which unreported test vectors are increasing also by which better fault coverage with a reduction in the bulkiness of the test circuit can be achieved.
Keywords: Low power- Bit complement Test vector Generation (LP- BCVPG), Bulkiness, test power and Linear feedback shift register (LFSR)
This paper presents a new approach, called Low Power -Bit complement test vector generation technique (LP-BCTVG). In LP-BCTVG technique, the output bits are complemented due to which unreported test vectors are increasing also by which better fault coverage with a reduction in the bulkiness of the test circuit can be achieved.
Keywords: Low power- Bit complement Test vector Generation (LP- BCVPG), Bulkiness, test power and Linear feedback shift register (LFSR)
Abstract
An Overview on Performance Improvement of an Induction Motors (IM) – A Review
VIJAYAKUMAR. R, M P MOHANDASS, ANGELINE SREEJA. S
Abstract: Several technologies of motors are available in the market, since the most affordable in terms of cost up to the most efficient or compact one. Besides that, motors have to be able to meet many specific application requirements, like speed range, installation, safety, reliability, low level of noise and vibration, long life, maintenance etc. Induction motors account for approximately 50 % of the overall electricity use in industrialized countries. In the agricultural and commercial sectors also, power consumption by ac motors is quite substantial. On an average, the energy consumed by a motor during its life cycle is 60-100 times the initial cost of the motor. However, in spite of all motor technologies, induction motors remain the most used in the market, especially when variable speed is not necessary. This paper presents a review on performance improvement factors of the Induction Motor (IM) operation. This paper discussed the factors are follows: (a) Efficiency improvement of IM (b) Torque control techniques of IM, and (c) Speed control techniques of IM.
Keywords: Performance improvement, Induction motor, Efficiency, Torque control, Speed control.
Keywords: Performance improvement, Induction motor, Efficiency, Torque control, Speed control.
Abstract
Design of Optimal Degaussing Electronics for Ring Laser Gyroscope
CHELLI ASHOK, P.DHANA LAKSHMI, K.C.DAS
Abstract: Ring laser gyros are effective tools for large scale geodetic surveying at a high level of accuracy. They allow rotation of a sensor block with the system and analytical transformation of the output to the coordinate frame of interest such as frequency difference between two oppositely directed laser beams. This paper includes, elimination of the remnant magnetic field in a rectangular coil carrying current efficiently at some point of time by using optimal analysis. To eliminate the remnant magnetic field, one of the methods called degaussing is used. This can be achieved by PWM by changing the duty cycle in different ways. The design of optimal degaussing electronics by optimization principle comprises of selecting one of the three degaussing models described.
Keywords: Ring Laser Gyroscope, Space Vehicle, Laser Beam, Magnetic Field, Degaussing, Bias, Applied Voltage Time, PWM, Duty Cycle, Optimization.
Keywords: Ring Laser Gyroscope, Space Vehicle, Laser Beam, Magnetic Field, Degaussing, Bias, Applied Voltage Time, PWM, Duty Cycle, Optimization.
Abstract
Development of Miniature Wind-Solar Hybrid Power Generating System and Monitoring of Parameters with NI USB-6009 DAQ
MOHD. ABDUL MUQEET, FAHMEEDA BEGUM, SYED FOUZAN ISHAQUI
Abstract: Renewable energy technologies vary from the well-established, such as hydropower and emerging wind-solar hybrid system. Earlier complicated and efficient systems had difficulty in measuring data variables due to non-availability of an efficient tool for acquiring and manipulating data. LabVIEW™ provides the flexibility of integration of data acquisition software/hardware with the tools to capture, view and process controls, instrumentation and power system data both in academia and industry. Our project aims at creating a LabVIEW™ based real-time data acquisition and instrumentation of a “Miniature Wind-Solar Hybrid Power Generating System”. We used NI USB 6009 DAQ for the data acquisition for the system variables such as wind energy, solar energy, and tracking of solar radiations.
Keywords: Wind Energy, Solar Energy, Data acquisition, LabVIEWTM, NI USB 6009 DAQ
Keywords: Wind Energy, Solar Energy, Data acquisition, LabVIEWTM, NI USB 6009 DAQ
Abstract
Performance of a Virtual Conductor in Dc Power Systems Using a Controlled Bidirectional DC-DC Converter
HUSAM A. RAMADAN, YASUTAKA IMAMURA, SIHUN YANG, MASAHITO SHOYAMA
Abstract: This paper proposes a new control strategy for bidirectional DC-DC converter. This strategy aims at controlling a bidirectional DC-DC converter to behave like a virtual conductor. As a matter of fact, the voltage difference between the terminals of any conductor is zero volts. Conversely, the main target of this proposed control strategy is to keep the voltage difference between the converter terminals constant at a certain value. In other words, this strategy permits the DC-DC converter to transfer the power between two nodes at different voltage levels. In this way, the converter performs like a conductor, but unlike the normal conductor, has a voltage difference between its terminals. Thus, the authors call it a virtual conductor. This virtual conductor is considered a base for power routing in dc networks; as it can transfer the electric power between nodes at different voltage levels. Furthermore, it allows an easy plug-and-play feature. The proposed bidirectional DC-DC system configuration is investigated analytically, using PSIM simulator, and experimentally.
Keywords: bidirectional DC-DC converters, virtual conductor, dc power routing, converter modeling and control.
Keywords: bidirectional DC-DC converters, virtual conductor, dc power routing, converter modeling and control.
Abstract
A new approach for somnolence detection & analysis based on LabVIEW
SIMRANJEET SINGH, DR.NAVEEN DHILLON, PROF.KARAMJEET SINGH
Abstract: Drowsiness is the state where a person is almost asleep or very lightly asleep. It refers to an inability to keep awake. In this thesis drowsiness and sleepiness are considered synonymous, but the term drowsiness will be used. Another concept commonly used is fatigue, which is an extreme tiredness that comes from physical or mental activity. Drowsiness can also be described by the grade of wakefulness or vigilance. Wakefulness is the same as alertness or a state of sleep inability, whereas vigilance can be defined as watchfulness or a state where one is prepared for something to happen. There are several factors which affect the grade of wakefulness. The time spent to carry out a task (time on task) and the amount of sleep during night are the most important factors. Other factors which are responsible are the amount of light, sound, temperature and oxygen content. Motivation and monotony of the task will also have an effect on the grade of wakefulness. Drowsiness can be measured by using physiological measures, performance measures, self-report or expert ratings. In the present trend suggests driving and navigation support systems are getting importance because it is crucial in supporting drivers in several conditions in automobile industry. It is important for driving support systems to detect the status/activity of driver’s consciousness. Detecting onset of driver fatigue could prevent the accidents caused by drowsy driving. It is proposed to detect / analyse the driver fatigue by the application of dedicated physiological indicators such as electroencephalography and also facial features such as eyelid movements based on template matching using neural network technique for closed eyes versus opened eyes. EEG signal is one of the most predictive and reliable measurements by the analysis of alpha, beta and theta band power etc., which are considered as direct factors associated with human drowsiness. The parameters such as blink duration and opening time changes reliably with increasing drowsiness.in this system LabView is used for analysing the data for this application.
Keywords: Drowsiness,EEG, LabView
Keywords: Drowsiness,EEG, LabView
Abstract
Harmonic Mitigation in Various Levels of Multilevel Inverter with Different Loads
P.TAMILVANI AND K.R.VALLUVAN
Abstract: Cascade Multilevel Inverters are very popular and have many applications in electric utilities and for industrial drives. When these inverters are used for industrial drives directly, the THD in the output voltage of inverters is very significant as the performance of drive depends very much on the quality of voltage applied to drive. A multilevel inverter in high power ratings improves the performance of the system by reducing harmonics. This paper presents the simulation of single phase nine level, eleven level and thirteen level inverters. Detailed analysis of these inverters has been carried out and compared with different loads. PWM control strategy is applied to the switches at appropriate conducting angles with suitable delays. These different level inverters are realized by cascade H-Bridge in MATLAB/SIMULINK. The inverters with a large number of steps can generate high quality voltage waveforms. The THD depends on the switching angles for different units of multilevel inverters. It has been found that the fifteen level CMLI satisfies this limit while seven and eleven level CMLI do not meet this limit.
Keywords: Cascaded H-bridge inverter, PWM, THD.
Keywords: Cascaded H-bridge inverter, PWM, THD.
Abstract
An Improved Technique for Complex SAR Image Compression Based on FFT and Discrete Wavelet Transform
GOPAL K. PATIDAR, KRISHNA PATIDAR, SWAPNA PILLAI, TARWAR S.SAVNER, M.CHIRANJEEVI
Abstract: SAR images are different from optical images in many ways. Therefore, the traditional compression methods, which have been used for compression, are not so efficient for the compression of the SAR images. Generally, 2-dimensional Fourier transform (2D-FT) is used for representing a complex SAR image. But, the energy of the coefficients of 2D-FT on the complex SAR image distributes in the whole frequency domain also. Typically, the frequency signals are divided into two parts, i.e., real and imaginary parts. A Wavelet transform gives very strong de correlation ability and can be used for local analysis in time and frequency with different scales. Wavelet transform have also been applied to complex SAR image compression, as it is suitable for non-stationary signal processing. We have embodied the wavelet transform with SPIHT for compression of SAR images. Also FFT is used for converting the complex SAR image into a real image before applying it to DWT. In particular, we have used Le Gall 5/3 biorthogonal wavelet for calculating the wavelet transform.
Keywords: Discrete Wavelet Transform (DWT), Fast Fourier Transform (FFT), Synthetic Aperture Radar (SAR), SPIHT, Image Compression, PSNR.
Keywords: Discrete Wavelet Transform (DWT), Fast Fourier Transform (FFT), Synthetic Aperture Radar (SAR), SPIHT, Image Compression, PSNR.
Abstract
Design & Implementation of Wireless Sensor Node for Measurement of Conducting Liquid
MR. AMOL ASHOK KSHIRSAGAR, MR. SHASHIKANT HIPPARGI
Abstract: With abundance of water on the earth the fresh water sources are limited. So a need arises to precisely measure this resource in many industrial and commercial places wirelessly. Many measurement techniques for liquid such as float, pressure gauge, ultrasonic and radar are available. Floats and pressure gauge suffer from cumulative error which increases with time whereas ultrasonic and radar give very small measuring errors but are very costly. So, an immediate need is felt for measuring the level of conducting liquid with reasonable accuracy and low cost. The proposed sensor node is supposed to measure a considerable range with a minimum error. It will be environment friendly, low power consumption and high accuracy device. It can serve as a calibration gauge to other sensor such as pressure and float used in conjunction with it. A solar panel and battery backup will aid the gauge to be installed at remote places where supply is partially or not available at all, this scheme would make the unit self dependent. An additional feature added will be of wireless transmission of data from sensor node to the master unit. A smart self powered sensor node with wireless data transmission capability will be implemented and presented in this paper.
Keywords: Wireless, sensor node, conducting liquid.
Keywords: Wireless, sensor node, conducting liquid.
Abstract
Mitigating Handover Complexity in Wimax Network by Using Femtocell
DR.T.V.P.SUNDARARAJAN, DR.S.M.RAMESH, SAKTHISUDHAN, GOWDHAMI.N
Abstract: WiMAX femtocells are currently under the development and they are expected to play an important role in the development of indoor broadband wireless access. Multiple femtocells are overlapped in WiMAX network for the purpose of improving coverage. The signal strength of WiMAX base station is usually stronger than the femtocell, hence there is no chance of handover. This paper thus proposes the velocity decision handover mechanism is used to reduce neighbor cell list for successful handover. The simulation results show that our scheme improves femtocell usage, offload the traffic of macrocell and decrease the handover delay compared to the conventional mechanism.
Keywords: Femtocell, WIMAX, Handover,Throughput
Keywords: Femtocell, WIMAX, Handover,Throughput
Abstract
Performance Analysis of Two-Level Space Vector Pulse Width Modulated Three Phase Voltage Source Inverters In All Possible Switching Sequences
S.MANIVANNAN, S.VEERAKUMAR, P.KARUPPUSAMY, A.NANDHAKUMAR
Abstract: The Space Vector Pulse Width Modulation (SVPWM) Technique has become one of the important PWM techniques for Three Phase Voltage Source Inverter (VSI) for the control of AC Induction Motors and Permanent magnet Synchronous Motors. The study of SVPWM technique reveals that space vector modulation technique utilizes DC bus voltage more efficiently and generates less harmonic distortion when compared to sinusoidal PWM technique. In this paper deals with the study of two-level SVPWM technique in all possible combinations of switching sequences. Here there are four possible switching sequences are compiled and analyzed the performance of three phase inverter in each switching sequences present in SVPWM. The analysis is made by using MATLAB/SIMULINK software and its performance was analyzed by its various parametric measures. The performance parameters to be considered in all four possible switching sequence presents in SVPWM are DC bus utilization, Total Harmonics Distortion (THD), Switching Stress, Efficiency of the Inverter, Variations in the load voltage and current. The simulation studies reveal that the best switching sequence presents in SVPWM provides better performance to the three phase inverter by various parameter measurements. The simulation results are provided to validate the proposed model approaches.
Keywords: Space vector Pulse width Modulation (SVPWM), Three Phase Inverter, Total Harmonic Distortion (THD), Switching Stress.
Keywords: Space vector Pulse width Modulation (SVPWM), Three Phase Inverter, Total Harmonic Distortion (THD), Switching Stress.
Abstract
Comparing USB Data Acquisition Instruments Using Arduino and PIC18F4550 in LabVIEW and Matlab
ELĂŤAS V. BEAUCHAMP, DR. ELIO LOZANO
Abstract: This paper designs three acquisition and playback systems for analog and digital data. Using three micro controllers architectures: Arduino (ARM), chipKIT (PIC32) and PIC18F4550 for the transmission of analog data to a PC. We compare differences in architecture and their communication schemes. Program interfaces for data acquisition were implemented in LabVIEW and Matlab. We proceeded to measure the throughput of samples that the computer can receive per unit time. This measure is estimated in several ways.First and second order statistics are used to comparetheir performance.
Keywords: Digital Signal Processing, LabVIEW, Matlab, Virtual Instrument, Arduino, PIC18F4550, USB data acquisition
Keywords: Digital Signal Processing, LabVIEW, Matlab, Virtual Instrument, Arduino, PIC18F4550, USB data acquisition
Abstract
Design and Implementation of Sensor for Noncontact Sensing of Liquid
MR. AMOL ASHOK KSHIRSAGAR, MR. SHASHIKANT HIPPARGI
Abstract: With the availability of mechanical floats, floats with switches, conducting liquid probes and many other complex sensor, here is presented a novel sensor having non-contact sensing technique to sense liquid level. This sensor consists of a magnetic float guiding over a p.v.c pipe. Inside the p.v.c pipe are placed reed switches to monitor the low and high level of the tank. With the vide variations of tank dimensions this sensor can be conveniently designed and easily fabricated. The non-contact principle avoids use of high voltages, adds safety, increases the life of sensor and over comes the maintenance problem faced by the other sensors.
Keywords: non-contact; magnetic float; p.v.c pipe.
Keywords: non-contact; magnetic float; p.v.c pipe.
Abstract
Transformation of ATM into Safe, Secure and Smart ATM
S.GANESH KUMARAN, DR. S.SINGARAVELU, C.PRIYA, DR.T.S.SIVAKUMARAN
Abstract: An automated or automatic teller machine (ATM), also known as the automated banking machine, is a computerized telecommunicating device. In this busy world people run out of cash with the only hope of finding an ATM machine. People known about the ATM working condition in our place without going to ATM. So GSM (Global System for Mobile Communication) is interfaced with the ATM network that can be sends all information to user‟s mobile. Problems like „out of order‟; „out of cash‟; „network jam‟ can be well versed before stepping into ATM. It also comes with a strip of LED Light which alerts people few meters ahead, about the working condition of the ATM machine. So that next time it is not needed to waste time in stepping in, inserting our card and pin in an ATM machine which is out of order, or out of cash. In addition we must prevent the misuse of the ATM enters by the strangers while someone is using it. So we propose the idea of using the counter circuit and metal detectors at the doors to detect the weapons (knife, gun, etc) carried by the strangers and we suggest that the number of persons entering the ATM should be limited to ONE at a time.
Keywords: GSM, Door sensors, Metal Detectors, Biometric System, Password, power saving, Secure ATM, Smart ATM.
Keywords: GSM, Door sensors, Metal Detectors, Biometric System, Password, power saving, Secure ATM, Smart ATM.
Abstract
Performance Analysis of Feedforward Adaptive Noise Canceller Using Nfxlms Algorithm
ADI NARAYANA BUDATI, B.BHASKARA RAO
Abstract: The adaptive filter operates by estimating the statistics of the incoming signal and adjusting its own response in such a way as to minimize some cost-function. The Active Noise Control (ANC) uses a primary input containing the corrupted signal and a reference input containing noise correlated in some unknown way with primary noise. The reference input is adaptively filtered and subtracted from the primary input to obtain the signal estimate. Adaptive filtering before subtraction allows the treatment of inputs that are deterministic or stochastic, stationary or time variable. A useful approach to this filter optimization problem is to minimize the mean square value of the error signal. In this paper, we have implemented the Adaptive Noise Cancellation using Filtered-x Least Mean Square (FxLMS) algorithm. Experimental results with MATLAB Simulation are presented that illustrate the usefulness of adaptive noise cancellation technique using FxLMS algorithm and Normalized FxLMS algorithm in a variety of practical situations.
Keywords: Noise Control (ANC), Filtered-x LMS (FxLMS), Normalized FxLMS.
Keywords: Noise Control (ANC), Filtered-x LMS (FxLMS), Normalized FxLMS.
Abstract
A Simulated Assessment of Loading Effect on Buck-Boost Converters used in Maximum Power Point Tracking of Photovoltaic Systems
BARNAM JYOTI SAHARIA, BANI KANTATALUKDAR
Abstract: This paper makes a comparative investigation resistive loading on buck-boost and its effect for use as interface for maximum power point tracking (MPPT) application in photovoltaic (PV) generators using the direct duty ratio control tracking algorithm. Analysis of the buck – boost converter has been undertaken to study the behaviour of the converter’s performance with respect to the changing atmospheric conditions and in-turn duty ratio variation (as a result of MPPT) and the tracking efficiency of each converter. Effect of different resistive loads on the output of the converter side has also been considered for the same converter topology and it has been observed that the buck-boost converter is able to track the maximum power point (MPP) under variation of insolation, temperature and loading effect, with good tracking efficiency.
Keywords: PV, BUCK-BOOST converters, MPPT, Tracking efficiency, Hill climb algorithm
Keywords: PV, BUCK-BOOST converters, MPPT, Tracking efficiency, Hill climb algorithm
Abstract
Dynamic Simulation of Grid Tied PV-Inverter Under Distorted Grid Voltage
S.LENIN PRAKASH, A.STANLEY JESUDAIYAN, M.ARUTCHELVI
Abstract: This paper presents a control strategy for a grid interface system fed by a PV source. A two stage topology with boost converter followed by a three phase VSI (voltage source Inverter) is employed for the grid interface. The proposed control strategy is capable of injecting harmonic free current to the grid even when the grid voltage is highly distorted. Also it is ensured maximum power is extracted from the PV and injected to the grid. The design of the magnetics used in the grid interface is also presented. The proposed control scheme is validated for injecting real power to the grid from a PV source by simulation in MATLAB SIMULINK environment. The results show that the proposed control scheme is an attractive solution for grid interface of DG sources like PV, fuel cells and wind driven PMSG.
Keywords: Photo-voltaic array, Three phase inverter, PLL, Hysteresis controller, d-q reference frame.
Keywords: Photo-voltaic array, Three phase inverter, PLL, Hysteresis controller, d-q reference frame.
Abstract
A Theoretical Study of Performance and Design Constraints of Non-Isolated Dc-Dc Converters
BARNAM JYOTI SAHARIA
Abstract: This paper investigates the effect of the variation of duty ratio on the different performance parameters of the three non-isolated dc-dc converters namely buck, boost and buck-boost converter. Five important parameters dependent on the duty ratio have been identified namely output voltage, output current, effective impedance at the input, minimum inductance and minimum capacitance for continuous conduction mode (CCM). The effect of variation duty ratio on the performance of these parameters is investigated and reported.
Keywords: Duty ratio; performance parameters; dc-dc converter; continuous conduction mode.
Keywords: Duty ratio; performance parameters; dc-dc converter; continuous conduction mode.