Vel Technology Multitech Dr Rangarajan Dr Sakunthala Engineering College

Vel, India

Vel Technology Multitech Dr Rangarajan Dr Sakunthala Engineering College

Vel, India
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Kalaimani P.,Anna University | Mohana Sundaram K.,Vel Technology Multitech Dr Rangarajan Dr Sakunthala Engineering College
Journal of Computational and Theoretical Nanoscience | Year: 2017

Congestion and voltage instability are major problems faced by electrical engineers in the deregulated power system as power system is widely expanding. This paper tries to provide a solution for maintaining the voltage stability of the system within the nominal limit and to reduce congestion The Flexible Alternating Current Transmission System (FACTS) devices are more encouraging in relieving congestion, improve power flow and maintain voltage stability of the system. In this paper Thyristor Controlled Series Compensation (TCSC) device is utilized to reduce the congestion and improve the voltage stability of fourteen bus test system. This paper develops the modeling of fourteen bus test system by using mat lab simulink software. The simulation process is carried out under the testing condition of open loop system with change in load, closed loop PI controlled TCSC and Fuzzy logic controlled TCSC for the fourteen bus test system and the system dynamic responses are analyzed. This paper proposes PI controlled Thyristor Controlled Series Compensator (TCSC) and fuzzy logic controlled Thyristor Controlled Series Compensator (TCSC) as a major tool in maintaining the voltage dynamics of the system. © 2017 American Scientific Publishers All rights reserved.


Parthasarathy V.,Vel Technology Multitech Dr Rangarajan Dr Sakunthala Engineering College
2014 International Conference on Science Engineering and Management Research, ICSEMR 2014 | Year: 2014

This paper is focusing on detection and prevention Sybil nodes in Wireless Sensor Networks. Sybil is a fake-ID based malicious activity destroying the networks behavior. Here IPTTA - [IP Traceback and Token Assigner] approach is proposed to detect and prevent Sybil attack by assigning and verifying IP address with assigned unique Token for each node in the route. IPTTA verify the node IP, Token with time stamp and fetch the contradictory node as Sybil node. The simulation results show that the IPTTA provides better result than the existing systems and reduces cost and time. © 2014 IEEE.


Daniel J.,National Engineering College | Abudhahir A.,Vel Technology Multitech Dr Rangarajan Dr Sakunthala Engineering College | Paulin J.J.,National Engineering College
Journal of Magnetics | Year: 2017

Material defects in the Steam Generator Tubes (SGT) of sodium cooled fast breeder reactor (PFBR) can lead to leakage of water into sodium. The water and sodium reaction will lead to major accidents. Therefore, the examination of steam generator tubes for the early detection of defects is an important requirement for safety and economic considerations. In this work, the Magnetic Flux Leakage (MFL) based Non Destructive Testing (NDT) technique is used to perform the defect detection process. The rectangular notch defects on the outer surface of steam generator tubes are modeled using COMSOL multiphysics 4.3a software. The obtained MFL images are de-noised to improve the integrity of flaw related information. Grey Level Co-occurrence Matrix (GLCM) features are extracted from MFL images and taken as input parameter to train the neural network. A comparative study on characterization have been carried out using feed-forward back propagation (FFBP) and cascade-forward back propagation (CFBP) algorithms. The results of both algorithms are evaluated with Mean Square Error (MSE) as a prediction performance measure. The average percentage error for length, depth and width are also computed. The result shows that the feed-forward back propagation network model performs better in characterizing the defects. ©The Korean Magnetics Society. All rights reserved. and © 2017 Journal of Magnetics.


Carmel Sobia M.,National Engineering College | Abudhahir A.,Vel Technology Multitech Dr Rangarajan Dr Sakunthala Engineering College
Journal of Computational and Theoretical Nanoscience | Year: 2017

A bunch of information is conveyed by human beings in the form of facial expression apart from just what is spoken. Automatic recognition of facial expressions could be a significant component of natural human-machine interfaces and it may also be used in behavioural science and in medical practice, which helps to ease the communication. This ability can serve in many contexts. In this paper, an efficient Hybridization of Adaptive Kernel function based Extreme Learning Machine with Chicken Swarm Optimization (HAKELM-CSO) algorithm is used for identifying the facial expression. Initially, the input image is pre-processed for noise removal and face detection is done using wiener filter. To recognize the skin region Quantum Evolutionary Algorithm (QEA) is used. The feature extraction is done through Grey-level co-occurrence matrix (GLCM) and the feature selection is made by Modified Firefly (MF) algorithm. These features are fed to HAKELM to classify the universal facial expressions. HAKELM learning algorithm with CSO approach is used for optimizing the kernel functions parameters. The experimental results shows that the proposed method performs better than existing Support Vector Machine (SVM) and Principle Component Analysis (PCA) methods in terms of the performance metrics such as ROC, Precision, Recall, F-Measure, accuracy and processing time by using MATLAB. The proposed method was evaluated with the images of Indian Face Database and Japanese Female Face Database. © Copyright 2017 American Scientific Publishers All rights reserved.


Chellaram C.,Vel Technology Multitech Dr Rangarajan Dr Sakunthala Engineering College | John A.A.,St Peters University
2014 International Conference on Science Engineering and Management Research, ICSEMR 2014 | Year: 2014

The present study involved the isolation and structural elucidation of the active constituent of gastropod, Drupa margariticola extract using different Chromatographie techniques and various tools of spectral analysis. The acetone phase of the D. margariticola showed promising activity indicating the presence of active fractions. The active compound, diterpenoid acylglycerol which has been isolated from the gastropod, Drupa margarüicola exhibited broad spectral activity against Salmonella typhimurium, Vibrio cholerae, Bacillus subtilis, with inhibitory zones of 8 mm, 8 and 8 mm, respectively at a concentration of 50μg. © 2014 IEEE.


Suresh V.,National Engineering College | Abudhair A.,Vel Technology Multitech Dr Rangarajan Dr Sakunthala Engineering College
Journal of Magnetics | Year: 2016

Dipole model based analytical expression is proposed to estimate the length and depth of the rectangular defect on ferromagnetic pipe. Among the three leakage profiles of Magnetic Flux Leakage (MFL), radial and axial leakage profiles are considered in this work. Permeability variation of the specimen is ignored by considering the flux density as close to saturation level of the inspected specimen. Comparing the profile of both the components, radial leakage profile furnishes the better estimation of defect parameter. This is evident from the results of error percentage of length and depth of the defect. Normalized pattern of the proposed analytical model radial leakage profile is good agreement with the experimentally obtained profile support the performance of proposed expression. © The Korean Magnetics Society. All rights reserved.


Mani P.K.,Vel Technology Multitech Dr Rangarajan Dr Sakunthala Engineering College | Siddappa Naidu K.,Vel Tech Dr.RR & Dr.SR Technical University
International Journal of Applied Engineering Research | Year: 2015

Voltage sags and swell are frequent events and are usually associated with fault in network, with energization of transformer or starting of large motors etc. Their duration is very short, but they can represent big problems of sensitive load like power electronic devices. In this paper, a fast PWM-based Dynamic Voltage Restorer (DVR) has been modelled and simulated with a Fuzzy Logic Controller (FLC) to investigate its performance and the relevant results are presented. A multifunctional control system is proposed in which the DVR protects the load voltage using Posicast and fuzzy logic controllers when the source of disturbance in the parallel feeders. On the other hand, during a downstream fault, the equipment protects the PCC voltage, limits the fault current, and protects itself from large fault current. When the fault current passes through the DVR, it acts like series variable impedance. This paper presents the digital modelling and simulation of a FLC-based DVR under voltage sag/swell phenomena. In this case, the fuzzy logic controller has been incorporated instead of conventional PI controller. The simulation tool used is the MATLAB/Simulink Power System Block set (PSB). To mitigate the voltage sag problem, a prototype model has been considered. © Research India Publications.


Adaikalam A.,Anna University | Manikandan S.,RMD Engineering College | Rajamani V.,Vel Technology Multitech Dr Rangarajan Dr Sakunthala Engineering College
Advances in Intelligent Systems and Computing | Year: 2015

In an optical network, packet scheduling is a big challenge over the communication. For the requirement to achieve high-speed communication, the network communication society needs the novel scheduler to schedule the variable length of packets in apropos method. The previous scheduling algorithms support mostly fixed size of packet, and it provides low throughput, high waiting time, and high latency. The proposed modified scheduler priority-based multischeduler (PBMS) scheduling algorithm overcomes these disadvantages through the following three methodologies: (i) prioritizer, (ii) splitter, and (iii) Round robin (RR) method; the prioritizer provides priority to the variable length of packets, queue splitter fixes the appropriate queue where the packet has been processed, and RR method assigns a fixed time unit to process the packets in queue with round drip mode. This paper proves the feasibility of our scheduler and comparative experimental results. © Springer India 2015.


Naidu S.,Vel Technology Multitech Dr Rangarajan Dr Sakunthala Engineering College
Optoelectronics and Advanced Materials, Rapid Communications | Year: 2015

For renewable power generation system wind power has become the most widely used technique. Therefore large wind turbine generators are used widely into electric power grids. The power generated by wind farm should be transmitted that can maintain large power flow. To enhance power transfer capability and the system stability, series capacitive compensation is a very cost-effective technique, since through long transmission lines large amount of power must be transmitted. This leads to occurring of sub-synchronous resonance. The phenomenon SSR can be damped by FACTS devices. In this paper, we proposed a modified IEEE Second Benchmark Model for damping SSR in hybrid system comprises of Steam and wind power generation system by using Static Synchronous Series Compensator (SSSC). Adaptive Neuro Fuzzy Inference System (ANFIS) and (FLDC) Fuzzy Logic Damping Controller are used to have a pitch angle optimal control in high speed of wind. © 2015, National Institute of Optoelectronics. All rights reserved.


Mani P.K.,Vel Technology Multitech Dr Rangarajan Dr Sakunthala Engineering College | Siddappa Naidu K.,Vel Tech Dr.RR & Dr.SR Technical University
ARPN Journal of Engineering and Applied Sciences | Year: 2015

There are many custom power devices and they are divided in two groups: network-reconfiguring type and compensating type. The network reconfiguring group includes the following devices: solid-state current limiter (SSCL), solid-state breaker (SSB) and solid-state transfer switch (SSTS). These devices are much faster than their mechanical counterparts. The compensating devices either compensate a load, correcting its power factor, unbalance etc., or improve the quality of the supply voltage. These devices are either connected in shunt or in series or a combination of both. The compensating group includes distribution static compensator (DSTATCOM) to compensate for load reactive power and current harmonics, dynamic voltage restorer (DVR) for voltage support, and unified power quality conditioner (UPQC) for both current and voltage compensation. The present work focuses on the last custom power device UPQC, which is a combination of a shunt and series device and can combine the functions of these two devices together. © 2006-2015 Asian Research Publishing Network (ARPN).

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