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VOLUME 2, ISSUE 12, DECEMBER 2014
Direct Torque and Flux Control of Five-Phase Induction Motor Using Fuzzy Logic
D.GHANBARI, N.R.ABJADI, A.GHANBARI
Development of mathematical model for lower urinary tract dysfunctions
MOHANAD A.DEAF, MOHAMED A.A.ELDOSOKY, AHMED M. EL-GARHY, HESHAM W.GOMMA, AHMED S.EL-AZAB
Iris Pattern Recognition using Support Vector Machines and Artificial Neural Networks
ASIM ALI KHAN, SMRITI KUMAR, MISTER KHAN
Adaptive Noise cancellation using Binary LMS Algorithm
N.HARITHA, S.VENKATA SWAMY
Analysis of Microstrip Triangular Fractal Antennas for Wireless Application
DR. G.KARUNAKAR, V.DINESH
Genetic Algorithm Based Congestion Management by Using Optimum Power Flow Technique to Incorporate Facts Devices in Deregulated Environment
S.VINOD KUMAR, J.SREENIVASULU, K.VIMALA KUMAR
A Review -Detection & alleviation of Clone Attacks in Wireless Sensor Networks
MANJUNATHA R C, DR. REKHA K R, DR. NATARAJ K R
MIMO-PID Controller for Deregulated environment
MALLEM PRADEEP KUMAR, K.VIMALA KUMAR
Economic pricing techniques for transmission network in deregulated electricity market
SHAIKASHRAF ALI, K.VIMALA KUMAR
A Novel Approach for Fault Classification and Fault Phase Selection for Transmission Lines
K.RAVI NARAYANA, DR. V.GANESH
Reactive power management by using STATCOM device
SACHIN K. SURYVANSHEE, SHIRISH V. SONTAKKE, ATUL S. NIKHADE, SNUSHA R. DHARMIK, DIWAKAR T. KORSANE
Automatic generation control with nonlinear design of interconnected power system using optimization techniques
KUNTERUKMANRAO, RAJA REDDY DUVVURU, RAJESH REDDY DUVVURU
Modelling and simulation of dc drive using PI and PID controller
MS.MANJUSHA PATIL
Design The 2×100 Gbps Based Hybrid WDM Optical Network
HIMANIRATHORE, ANKITA R. MOWAR, DR.SONICHANGLANI
Harmonics Detection Using Prony Frequency Analysis Algorithm in Transformer Inrush Current Generation after Fault Clearance
SANDEEPA WYLIE, PRATIBHA TIWARI
The influence of Thyristor controlled series capacitor on distance protection relay and its mitigation
ATULKUMAR SHUKLAJI NIKHADE, VIVEK YADAV, RAHUL P. DHOTE, SNUSHA R. DHARMIK
Development of TIF for Transaction Cost Allocation in Deregulated Power System
NOOLU.NARENDRA REDDY, KURAKULA.VIMALA KUMAR
Application with MUCOS RTOS on embedded systems
ELUMALAI.R, A.R PURUSHOTHAM REDDY, PUSHPA.M.K, JYOTHIRMAYI.M, M.D.NANDEESH
Simulation of MRAC based speed control of brushless DC motor with low-resolution hall-effect sensors
G.SUNIL, B.RAJASEKHAR
Use of firefly algorithm for solving optimal power flow problem with static synchronous series compensator
CH.VASAVI, A.V. NARESH BABU, S.SIVANAGARAJU
Comparative Analysis of Perturb-and-Observeand Incremental Conductance MPPT Techniquesfor Solar PV Array
Mr. G. Joga Rao, Dr. S.K Shrivastava
Abstract
Direct Torque and Flux Control of Five-Phase Induction Motor Using Fuzzy Logic
D.GHANBARI, N.R.ABJADI, A.GHANBARI
DOI: 10.17148/IJIREEICE.2014.21201
Abstract: In this paper a fuzzy logic scheme is applied for direct torque fuzzy control (DTFC) of five phase induction machine (FPIM). The proposed DTFC based on fuzzy logic technique switching table is described and compared with conventional direct torque control (DTC). The proposed fuzzy control strategy is simulated using Matlab/Simulink software. The simulation results show that DTFC method reduces torque ripple and stator flux variation and improves dynamic response.
Keywords: Five Phase Induction Motor, Fuzzy Control, Direct Torque Control
Keywords: Five Phase Induction Motor, Fuzzy Control, Direct Torque Control
Abstract
Development of mathematical model for lower urinary tract dysfunctions
MOHANAD A.DEAF, MOHAMED A.A.ELDOSOKY, AHMED M. EL-GARHY, HESHAM W.GOMMA, AHMED S.EL-AZAB
DOI: 10.17148/IJIREEICE.2014.21202
Abstract: The main objective of this paper is to simulate different types of diseases that cause deformities which occur in the lower urinary tract system together with abnormal micturition , which results from these diseases. To achieve this a modified version of the normal micturition process model proposed by William Fletcher [1] was developed and simulated using MATLAB. The new model is assuming abnormal nerve signals and bladder, ureteral muscles disorders The newly developed model allows to simulate six types of lower urinary tract system (LUTS) disorders caused by dysfunctions in bladder, urethral muscles and nerves control system and gives mathematical representation for abnormal micturition process.
Moreover, the simulation developed has got a wide number of advantages in the medical sector such as design intelligent control scheme to correct any deformations that occur in lower urinary tract system, and can be allowed to test the system safely before trial with humans.
Keywords: lower urinary tract system (LUTS) disorders, Abnormal micturition , Bladder Output Relation(BOR), Urethral Resistance Relation (URR) .
Moreover, the simulation developed has got a wide number of advantages in the medical sector such as design intelligent control scheme to correct any deformations that occur in lower urinary tract system, and can be allowed to test the system safely before trial with humans.
Keywords: lower urinary tract system (LUTS) disorders, Abnormal micturition , Bladder Output Relation(BOR), Urethral Resistance Relation (URR) .
Abstract
Iris Pattern Recognition using Support Vector Machines and Artificial Neural Networks
ASIM ALI KHAN, SMRITI KUMAR, MISTER KHAN
DOI: 10.17148/IJIREEICE.2014.21203
Abstract: An authentic personal identification infrastructure is required to control the access in order to secure areas or materials. Biometric technology is based on physiological or behavioral characteristics of a human body. Iris recognition system consists of image acquisition, localization, normalization, features extraction and encoding, and classification. Iris images are downloaded from CASIA Iris V1.0 database for study. To separate the iris region from the eye image, Hough transform is used. Circular Hough transform is used to localize circular iris and pupil region while parabolic Hough transform is used to enhance the occluding eyelids and eyelashes. Daugman‟s rubber sheet model is used to normalize the extracted iris region into a rectangular block with constant polar dimensions. After normalization, 2D Gabor filter is employed to extract the important features from iris. Iris provides texture information which is unique, universal and contains high randomness. Feature extraction is performed by convolving the normalized iris region with 2D Gabor filter which gives the phase information. The phase data represented by a data set is utilized as input for classifiers. The classifiers used in this study are Artificial Neural Networks (ANN) and Support Vector Machines (SVM). This study shows that Support Vector Machines gives higher recognition rate than Artificial Neural Networks.
Keywords: Iris segmentation, Iris recognition, Hough transform, 2D Gabor filter, Support Vector Machines, Artificial Neural Networks.
Keywords: Iris segmentation, Iris recognition, Hough transform, 2D Gabor filter, Support Vector Machines, Artificial Neural Networks.
Abstract
Adaptive Noise cancellation using Binary LMS Algorithm
N.HARITHA, S.VENKATA SWAMY
DOI: 10.17148/IJIREEICE.2014.21204
Abstract: In Speech processing Signal to Noise (SNR )Ratio plays an important role for Noise cancellation. here an attempt is made to evaluate SNR for given Noisy Speech signal using adaptive technique Binary LMS algorithm. In this proposal , Introduces the two control parameters of the Adaptive Algorithm rather than one control parameter as in case of LMS Algorithm. Also comparirison is made with respect to the SNR for the given noisy speech.
Keywords: Adaptive Filters,Windows,LMS, and Binary LMS
Keywords: Adaptive Filters,Windows,LMS, and Binary LMS
Abstract
Analysis of Microstrip Triangular Fractal Antennas for Wireless Application
DR. G.KARUNAKAR, V.DINESH
DOI: 10.17148/IJIREEICE.2014.21205
Abstract: The microstrip antennas take any shape like square, rectangular, triangle and so on. They provide normally single resonance frequency with high quality factor because of narrow bandwidth. However, the fractal antennas are able to provide either multi-band resonances or broad bandwidth because of the self-similar and space-filling properties.
In present paper, a study is made on Sierpinski gasket triangular fractal antenna for single and multiband applications. Design and simulation is done using HFSS 13.0 software and fabrication is done using photolithography etching method which gives adequate result for this type of antennas. By using vector network analyzer E5071C the designed antennas are tested and various plots like return loss, VSWR, smith chart and polar plot are verified. The designed antennas are used in implantable medical (IMD) applications and other wireless applications.
Keywords: HFSS, IMD, Triangular Fractal antenna
In present paper, a study is made on Sierpinski gasket triangular fractal antenna for single and multiband applications. Design and simulation is done using HFSS 13.0 software and fabrication is done using photolithography etching method which gives adequate result for this type of antennas. By using vector network analyzer E5071C the designed antennas are tested and various plots like return loss, VSWR, smith chart and polar plot are verified. The designed antennas are used in implantable medical (IMD) applications and other wireless applications.
Keywords: HFSS, IMD, Triangular Fractal antenna
Abstract
Genetic Algorithm Based Congestion Management by Using Optimum Power Flow Technique to Incorporate Facts Devices in Deregulated Environment
S.VINOD KUMAR, J.SREENIVASULU, K.VIMALA KUMAR
DOI: 10.17148/IJIREEICE.2014.21206
Abstract: Congestion management is one of the important techniques to relieve congestion in transmission system. The usage of transmission line crosses the limits, then congestion occurs. Application of FACTS controllers is as a solution to the problem of congestion management. In the literature Genetic Algorithm (GA) based Optimum Power Flow (OPF) technique is used to determine the optimal location of Static VAR Compensator (SVC). But in this paper Unified-Power-Flow Controller (UPFC) is modeled and located in the system to relieve congestion, also compared with the SVC. This method was applied on IEEE 30-bus test system and a program was developed in MATLAB software environment.
Keywords: Flexible Alternative Current Transmission System (FACTS), Congestion Management, Optimum Power Flow (OPF), Genetic Algorithm (GA), Static VAR Compensator (SVC), Unified-Power-Flow Controller (UPFC).
Keywords: Flexible Alternative Current Transmission System (FACTS), Congestion Management, Optimum Power Flow (OPF), Genetic Algorithm (GA), Static VAR Compensator (SVC), Unified-Power-Flow Controller (UPFC).
Abstract
A Review -Detection & alleviation of Clone Attacks in Wireless Sensor Networks
MANJUNATHA R C, DR. REKHA K R, DR. NATARAJ K R
DOI: 10.17148/IJIREEICE.2014.21207
Abstract: Wireless Sensor Networks (WSNs) offer an excellent opportunity to monitor environments, and have a lot of interesting applications, some of which are quite sensitive in nature and require full proof secured environment. The security mechanisms used for wired networks cannot be directly used in sensor networks as there is no user-controlling of each individual node, wireless environment, and more importantly, scarce energy resources. In this research, we consider a typical threat known as clone node attack, where an adversary creates its own low-cost sensor nodes called clone nodes and misinforms the network to acknowledge them as legitimate nodes. To instigate this attack, an adversary only needs to physically capture one node, and after collecting all secret credentials, an adversary clones the sensor node and deploys one or more clones of the compromised node into the network at strategic positions, damaging the whole network by carrying out many internal attacks. Detecting the node clone attack has become an imperative research topic in sensor network security, and designing detection schemes against node clone attack involves different threatening issues and challenges. In this review, we have classified the existing detection schemes and comprehensively explore various suggestions in each category as to demonstrate limitations of the existent detections as well as effective contributions.
Keywords: Clone Attack, Wireless Sensor Network, Network Security, WSN, Review.
Keywords: Clone Attack, Wireless Sensor Network, Network Security, WSN, Review.
Abstract
MIMO-PID Controller for Deregulated environment
MALLEM PRADEEP KUMAR, K.VIMALA KUMAR
DOI: 10.17148/IJIREEICE.2014.21208
Abstract: This assessment represents a Multi-Input-Multi-Output-Proportional-Integral-Derivative (MIMO-PID) controller for load frequency balance issues.The objective of load frequency control is to minimize the transient deviations in area frequency and tie-line power. To improve the robustness of the system the transfer function H∞ norm is used. So the proposed technique is known as PIDH∞ controller. The LFC problem is articulated as a H∞ SOF (State Output Feedback) control approach to attain the decentralized robust MIMO-PIDH∞ controller. H∞ controller is used here for accomplishing stabilization with definite performance. The optimization difficult is formulated and iterative LMI algorithm is used to tune the control parameters of the MIMO-PIDH∞ controller. The simulation results show the proposed strategy is very effective and guaranteed good robust performance against the parametric uncertainties and load changes.
Keywords: H∞ control; LMI; Area Control Error; Load Frequency Control; MIMO-PID control.
Keywords: H∞ control; LMI; Area Control Error; Load Frequency Control; MIMO-PID control.
Abstract
Economic pricing techniques for transmission network in deregulated electricity market
SHAIKASHRAF ALI, K.VIMALA KUMAR
DOI: 10.17148/IJIREEICE.2014.21209
Abstract: The aim of deregulation is to introduce an element of competition into electrical energy delivery and thereby allow market forces to price energy at low rates for the customer and higher efficiency for the suppliers. The necessity for deregulation is to provide cheaper electricity, to offer greater choice to the customer in purchasing the economic energy, to give more choice of generation and to offer better services with respect to power quality i.e. constant voltage, constant frequency and uninterrupted power supplythis paper provides a methodology to apportion the cost of the transmission network to generators and demands that use it. How to allocate the cost of the transmission network is an open research issue as available techniques embody important simplifying assumptions,which may render controversial results. In this paper three techniques namely Zbusmethod, Zbusavgmethod and Relative Electrical Distance (RED) method for the network cost allocation is compared. It has been successfully applied on an IEEE 24 bus-Reliability Test System (RTS) and the results obtained are compared.
Keywords: Transmission network cost allocation, active power flow, generator cost contribution, load cost contribution, Zbus,Zbusavg and RED.
Keywords: Transmission network cost allocation, active power flow, generator cost contribution, load cost contribution, Zbus,Zbusavg and RED.
Abstract
A Novel Approach for Fault Classification and Fault Phase Selection for Transmission Lines
K.RAVI NARAYANA, DR. V.GANESH
DOI: 10.17148/IJIREEICE.2014.21210
Abstract: Transmission lines are used to transmit electric power for large distances in electrical power systems. The rapid growth of electrical power systems over the past few decades has resulted in a massive increase of the quantity of lines operative and their total length. These lines are exposed to faults as a result of lightning, short circuits, faulty equipment‟s &human errors. This paper presents a novel approach for fault classification and faulted phase selection for Transmission lines that is dispensed with sequential reactive power components. The proposed technique has been taking a look at about two cases and every case has eighteen test cases from each end. This technique identifies single line to ground fault, double line to ground fault & double line faults for given test case systems and this is implemented using Mat Lab software package.
Keywords: Transmission lines, lightning,s hort circuits, Sequential Reactive power components.
Keywords: Transmission lines, lightning,s hort circuits, Sequential Reactive power components.
Abstract
Reactive power management by using STATCOM device
SACHIN K. SURYVANSHEE, SHIRISH V. SONTAKKE, ATUL S. NIKHADE, SNUSHA R. DHARMIK, DIWAKAR T. KORSANE
DOI: 10.17148/IJIREEICE.2014.21211
Abstract: As the power system is operated closer to the security limit, environmental constraints restrict the expansion of transmission network. The need for long distance power transmission has increased and little number of operators are engaged in the supervision and operation of power system. Voltage stability has become major problems in many power systems. Due to change in load and the drop in the load, voltage increased and demand for the reactive power increased. This change leads to a progressive & rapid change of voltage at that location, which may have a cascading effect on neighboring regions that causes voltage drop. In this paper, Static synchronous compensator (STATCOM) is used to maintain the voltage within the limits. STATCOM will manage the reactive power or extract the reactive power.
Keywords: FACTS, STATCOM, Voltage Stability, Reactive power.
Keywords: FACTS, STATCOM, Voltage Stability, Reactive power.
Abstract
Automatic generation control with nonlinear design of interconnected power system using optimization techniques
KUNTERUKMANRAO, RAJA REDDY DUVVURU, RAJESH REDDY DUVVURU
DOI: 10.17148/IJIREEICE.2014.21212
Abstract: An electric power system comprises of generation, transmission and distribution of electric energy. To meet today‟s load demand different generations are interconnected via tie lines. This paper deals with AGC problem of a two area thermal system using Proportional-integral-derivative controller (PID). The controller parameters are tuned by using particle swarm optimization (PSO) and Many optimizing Liaisons (MOL) algorithms. Dynamic response of the PID controlled AGC tuned by both the algorithms are compared by applying 1% step load perturbation (SLP) in both areas at different conditions. The cost function is derived by taking the area control errors (ACE) of both the areas. The system is checked for robustness by varying the parameters of the governor, turbine and reheat from -50% to +50% in steps of 25%. Based on analysis, facts & figures the system is found to be robust and performs better when tuned by the MOL algorithm.
Keywords: Automatic Generation Control, Area control error, PSO and MOL algorithms, Matlab software.
Keywords: Automatic Generation Control, Area control error, PSO and MOL algorithms, Matlab software.
Abstract
Modelling and simulation of dc drive using PI and PID controller
MS.MANJUSHA PATIL
DOI: 10.17148/IJIREEICE.2014.21213
Abstract: Many industrial applications require high performance rotating electric drives. A proposed D C drive have a precise speed control, stable operation in complete range of speed and good transient behaviour with smooth and step less control. The purpose of developing a simulation using PI and PID control system is to get steady state and transient response of drive system. Once the type of controller has been decided then the design and analysis are done. This paper focuses modelling of separately excited DC motor for the analysis of machine under any condition and compares the step response of system with and without PI and PID controller.
Keywords: DC Motor, Modelling, Simulation, PI & PID controller.
Keywords: DC Motor, Modelling, Simulation, PI & PID controller.
Abstract
Design The 2×100 Gbps Based Hybrid WDM Optical Network
HIMANIRATHORE, ANKITA R. MOWAR, DR.SONICHANGLANI
DOI: 10.17148/IJIREEICE.2014.21214
Abstract: Multiplexing is an essential part in a communication system. It is widely employed due to increase transmission capacity and to reduce system costs. There are three basic types of multiplexing technique in communication systems; time division multiplexing (TDM), frequency or wavelength division multiplexing (FDM) or (WDM), and code division multiplexing (CDM). In this paper, wavelength division multiplexed optical communication system is designed based on different duty cycle. The design is proposed for 10- users and data rate is 2×100 transmitted up to 78 km using SSMF.
Keywords: WDM, BER
Keywords: WDM, BER
Abstract
Harmonics Detection Using Prony Frequency Analysis Algorithm in Transformer Inrush Current Generation after Fault Clearance
SANDEEPA WYLIE, PRATIBHA TIWARI
DOI: 10.17148/IJIREEICE.2014.21215
Abstract: The traditional infrastructure of power system industry is presently going through large amount of change that consensus over the improvement of power quality for fulfilling this requirement electronically automated devices having high sensitivity toward the disturbance in the power system signals are under the major consensus of research activities. The low power quality signal is responsible for malfunctioning of equipments that result in reduction of production and rise in the cost of production. In the modern age electronic convertors, facts and other thyristor controlled devices is combine with the new power transmission schemes. That produces harmonics current of high frequency order and brings large amount of current and voltage quality distortion. In this paper we are investigating and implementing the Prony harmonics analysis algorithm for estimation of harmonics in the voltage cycle available during saturable core transformer energizing the result are validate and compared with the short time Fourier analysis our proposed approach found to be more accurate and aliquant for non linear discrete data signals.
Keywords: Prony filter, THD, Short Time Fourier analysis, Saturable Core Transformer, Matlab.
Keywords: Prony filter, THD, Short Time Fourier analysis, Saturable Core Transformer, Matlab.
Abstract
The influence of Thyristor controlled series capacitor on distance protection relay and its mitigation
ATULKUMAR SHUKLAJI NIKHADE, VIVEK YADAV, RAHUL P. DHOTE, SNUSHA R. DHARMIK
DOI: 10.17148/IJIREEICE.2014.21216
Abstract: In modern power transmission systems suffering from large voltage drop and transfer capability of power reduces due to the line reactance and thermal limits. Therefore, Thyristor Controlled Series Capacitor (TCSC) has been used to improve the power transfer capability of transmission line by changing the reactive power distribution in the power system. This paper discusses the effect of TCSC for power enhancement capability. Further, the effect of TCSC on distance protection relay of transmission lines due to the fast response time of thyristor controllers with respective that of the protective devices is also investigated.
Keywords: Transmission line protection, distance relay, FACTS Devices, active power, reactive power, TCSC
Keywords: Transmission line protection, distance relay, FACTS Devices, active power, reactive power, TCSC
Abstract
Development of TIF for Transaction Cost Allocation in Deregulated Power System
NOOLU.NARENDRA REDDY, KURAKULA.VIMALA KUMAR
DOI: 10.17148/IJIREEICE.2014.21217
Abstract: In deregulated power system due to the increase of power transactions in transmission open access the transmission cost allocation is one of the major problems. For each transaction the Transaction Impact Factors (TIFs) are developed for the allocation of the transmission transaction costs. The transmission Impact Factor gives the information about the real power flow in the transmission lines with the transacted power. This logical method provides the impact of the line flows without running power flow solutions when the amount of transacted power changes in real time. This proposed method is evaluated by considering bilateral and multilateral transactions. The results coming from the proposed method is compared with Megawatt Modulus (MM) method on sample six bus and IEEE 30 bus system.
Keywords: Deregulation, Cost allocation, Transmission Impact Factors, Bilateral transaction, Multilateral transaction.
Keywords: Deregulation, Cost allocation, Transmission Impact Factors, Bilateral transaction, Multilateral transaction.
Abstract
Application with MUCOS RTOS on embedded systems
ELUMALAI.R, A.R PURUSHOTHAM REDDY, PUSHPA.M.K, JYOTHIRMAYI.M, M.D.NANDEESH
DOI: 10.17148/IJIREEICE.2014.21218
Abstract: Real-time operating system (RTOS) is a very useful tool for developing the application on embedded boards with least software development effort. Though number of RTOS products are available in the market, μC/OS-II is a freeware with minimum facility and more popular among the hobbyist, researchers and small embedded system developers. The μC/OS-II supports preemptive scheduling which is not efficient with respect to processor utilization. As a result, this may lead to missing deadline of the task assigned and hence may cause system failure. In this paper, a Rate Monotonic scheduling (RM), which is a better scheduling method when compared to preemptive technique, is implemented on μC/OS-II and its operation in terms of task execution and processor utilization are discussed. This paper presents the RM Analysis (RMA) on μC/OS-II with two different types of hardware: 1) Low end microcontroller i.e., 8051 based system and 2) High end system based on ARM9 is used. For the demonstration of RM Analysis, two tasks, namely, 1) Advanced encryption standard (AES) and 2) Text message display and graphic display are implemented. The software tools Keil IDE, SDCC compiler and Phillips Flash Magic are used for implementation of tasks on 8051 embedded development board. The ARM developers Suite v1.2 and DNW are used for implementation of tasks on ARM9 development board. In addition to the above said tasks, additional tasks like Real time clock interface, graphical LCD interface and UART interface for communication with computer are also implemented. The scaled-version of μC/OS-II with multiple tasks uses 4 kB of flash and 512 bytes of RAM in 8051 board. The entire MUCOS RTOS in ARM9 with multiple tasks uses 29.23 kB of flash and 596.36 kB of RAM. The results obtained indicate optimum utilization of processor with RMA scheduler for realizing low cost software for developing the application on embedded boards with least software development effort.
Keywords: RTOS, Keil IDE, ARM9, AES, μC/OS-II and Microcontroller.
Keywords: RTOS, Keil IDE, ARM9, AES, μC/OS-II and Microcontroller.
Abstract
Design of low power pipelined ADC
AMIT MAHESHWARI, GAURAV GUPTA
DOI: 10.17148/IJIREEICE.2014.21219
Abstract: A design of 8 bits, 2.5V pipeline ADC is introduced in this paper. The comparator is the main improvement aiming at realizing low power dissipation. The latched comparator is adopted to achieve the specification. The design is implemented under 0.25um CMOS technology which achieves a power dissipation of 205.9mW.
Keywords: Comparator, Op-amp, SUB-ADC, MDAC, SNDR, ENOB
Keywords: Comparator, Op-amp, SUB-ADC, MDAC, SNDR, ENOB
Abstract
Simulation of MRAC based speed control of brushless DC motor with low-resolution hall-effect sensors
G.SUNIL, B.RAJASEKHAR
DOI: 10.17148/IJIREEICE.2014.21220
Abstract: A novel speed estimation approach with control system based on model reference adaptive control (MRAC) is presented for low cost brushless dc motor drives with low-resolution hall sensors. The back EMF is usually used to estimate speed. But the estimation result is not accurate enough at low speeds because of the divided voltage of stator resistors and too small back EMF. Moreover, the stator resistor is always varying with the motor‟s temperature. A speed estimation algorithm based on MRAC was proposed to correct the speed error estimated by using back EMF. The proposed algorithm‟s most innovative feature is its adaptability to the entire speed range including low speeds and high speeds and temperature and different motors do not affect the accuracy of the estimation result. The effectiveness of the algorithm was verified through simulations and experiments.
Keywords: Brushless dc motor, low-resolution hall sensor, model reference adaptive control, speed estimation
Keywords: Brushless dc motor, low-resolution hall sensor, model reference adaptive control, speed estimation
Abstract
Use of firefly algorithm for solving optimal power flow problem with static synchronous series compensator
CH.VASAVI, A.V. NARESH BABU, S.SIVANAGARAJU
DOI: 10.17148/IJIREEICE.2014.21221
Abstract: This paper presents an efficient and reliable evolutionary based approach to solve the optimal power flow (OPF) problem in the presence of static synchronous series compensator (SSSC). The firefly algorithm (FFA) is developed by using principle of firefly swarm. The approach has been tested on IEEE 30- bus system with and without SSSC. The results show that FFA algorithm with SSSC gives better performance of the system. The results are promising and show the effectiveness and robustness of the approach.
Keywords: Optimal Power Flow, Optimization Methods, Power Systems, Firefly Algorithm, Static Synchronous Series Compensator.
Keywords: Optimal Power Flow, Optimization Methods, Power Systems, Firefly Algorithm, Static Synchronous Series Compensator.
Abstract
Comparative Analysis of Perturb-and-Observeand Incremental Conductance MPPT Techniquesfor Solar PV Array
Mr. G. Joga Rao, Dr. S.K Shrivastava
DOI: 10.17148/IJIREEICE.2014.21222
Abstract: The increasing demand for electricity and depleting fossil fuels made the solar Photovoltaic (PV) systems to be a better alternative for the future power requirements. Nowadays solar energy has great importance. Because it is easily available resource for energy generation. Solar panels have a nonlinear voltage-current characteristic, with a distinct maximum power point (MPP), which depends on the environmental factors, such as temperature and irradiation. In order to continuously harvest maximum power from the solar panels, they have to operate at their MPP despite the inevitable changes in the environment. This is why the controllers of all solar power electronic converters employ some method for maximum power point tracking (MPPT). Maximum Power Point Tracking (MPPT) which significantly increases the efficiency of the solar photovoltaic System. There are different MPPT control methods used for solar PV systems, Incremental conductance(InC), Perturb and observe(P&O), Constant Current method, Constant Voltage method, Fuzzy Control, and Neural Network Control. This paper presents the comparative analysis between Perturb & Observe (P&O), Incremental Conductance (InC) MPPT techniques and the simulation has been accomplished for PV array using boost converter in MATLAB/SIMULINK.
Keywords: Photovoltaic (PV) System, Maximum Power Point Tracking (MPPT), Maximum Power Point (MPP), Perturb and observe (P&O), Incremental Conductance method (InC), Boost Converter.
Keywords: Photovoltaic (PV) System, Maximum Power Point Tracking (MPPT), Maximum Power Point (MPP), Perturb and observe (P&O), Incremental Conductance method (InC), Boost Converter.
Abstract
Query Processing in Global Information Systems
Lijo John
DOI: 10.17148/IJIREEICE.2014.21223
Abstract: The retrieval of meaningful information is referred to as a query. It can be done in one of three ways: by selecting parameters from a menu, by Query by Example, or by Query language. It is critical that the user understands what he is asking from the query while searching. Energy efficiency is an important consideration when designing and running queries in databases. When the query processing stage is not well understood, attempts are made to execute too many calculations across a large result set during result processing, loading the system beyond its query rate capacity, generating a backlog of queries, resulting in higher query latencies and possibly service disruption.
Keyword: Query Processing, Global information, DBMS , DML, Query translator, Query processing strategy.
Keyword: Query Processing, Global information, DBMS , DML, Query translator, Query processing strategy.