Vadodara Institute of Engineering

Vadodara, India

Vadodara Institute of Engineering

Vadodara, India
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Singh R.,Vadodara Institute of Engineering | Singh D.K.,IET Alwar
Proceedings - 2012 2nd International Conference on Advanced Computing and Communication Technologies, ACCT 2012 | Year: 2011

This paper deals with control strategies for DSTATCOM (Distribution Static Compensator) for power quality improvement for a three-phase, three-wire distribution system. A three-leg voltage source inverter (VSI) configuration with a dc bus capacitor is employed as DSTATCOM. The PWM current controllers are designed analyzed and compare for PI controller. The capability of the DSTATCOM is demonstrated through results obtained using PSIM. The performance of the DSTATCOM acting as a shunt compensator is found satisfactory under varied load perturbations. © 2012 IEEE.

Rathod N.R.,Maharaja Krishnakumarsinhji Bhavnagar University | Rathod N.R.,Vadodara Institute of Engineering | Gupta S.K.,Maharaja Krishnakumarsinhji Bhavnagar University | Gupta S.K.,Michigan Technological University | And 2 more authors.
Computational Materials Science | Year: 2013

The structural, electronic, elastic and lattice dynamic along with the allied properties like superconductivity, thermal conductivity and electrical resistivity of palladium carbide (PdC) in two crystallographic phases are studied using the first principles ab initio calculations. The calculated mechanical and lattice dynamical properties shows mechanical and dynamical stability of PdC in rock salt phase. The superconducting transition temperature of about 15 K for RS-PdC suggests its being a superconductivity material. The possible use of PdC in thermoelectric devices using thermal conductivity and resistivity is also discussed. The present study suggests that the PdC can be a potential candidate for the thermoelectric application at higher temperatures. © 2013 Elsevier B.V. All rights reserved.

J. Patel U.,Vadodara Institute of Engineering | Chothani N.G.,A D Patel Institute of Technology | Bhatt P.J.,Vadodara Institute of Engineering
International Journal of Emerging Electric Power Systems | Year: 2016

Sudden changes in loading or configuration of an electrical network causes power swing which may result in an unwanted tripping of the distance relay. Hence, it becomes utmost necessary to rapidly and reliably discriminate between actual fault and power swing conditions in order to prevent instability in power network due to mal operation of distance relay. This paper proposes a novel method for the discrimination between fault and power swing based on rate of change of voltage and reactive power measured at relay location. The effectiveness of the proposed algorithm is evaluated by simulating series of power swing conditions in PSCAD/EMTDC® software for different disturbances such as change in mechanical power input to synchronous generator, tripping of parallel line due to fault and sudden application of heavy load. It is revealed that the distance relay gives successful tripping in case of different fault conditions and remains inoperative for power swing with the implementation of the proposed algorithm. Moreover, the proposed scheme has ability to distinguish the symmetrical and asymmetrical fault occurrence during power swing condition. © 2016 by De Gruyter.

Rathod N.,Bhavnagar University | Rathod N.,Vadodara Institute of Engineering | Gupta S.K.,Bhavnagar University | Jha P.K.,Bhavnagar University
Phase Transitions | Year: 2012

A comprehensive first principles study of structural, elastic, electronic, and phonon properties of zirconium carbide (ZrC) is reported within the density functional theory scheme. The aim is to primarily focus on the vibrational properties of this transition metal carbide to understand the mechanism of phase transition. The ground state properties such as lattice constant, elastic constants, bulk modulus, shear modulus, electronic band structure, and phonon dispersion curves (PDC) of ZrC in rock-salt (RS) and high-pressure CsCl structures are determined. The pressure-dependent PDCs are also reported in NaCl phase. The phonon modes become softer and finally attain imaginary frequency with the increase of pressure. The lattice degree of freedom is used to explain the phase transition. Static calculations predict the RS to CsCl phase transition to occur at 308GPa at 0K. Dynamical calculations lower this pressure by about 40GPa. The phonon density of states, electron-phonon interaction coefficient, and Eliashberg's function are also presented. The calculated electron-phonon coupling constant and superconducting transition temperature agree reasonably well with the available experimental data. © 2012 Copyright Taylor and Francis Group, LLC.

Mankad V.,Bhavnagar University | Rathod N.,Bhavnagar University | Rathod N.,Vadodara Institute of Engineering | Gupta S.D.,Bhavnagar University | And 2 more authors.
Materials Chemistry and Physics | Year: 2011

A comprehensive first principles study of structural, elastic, electronic, phonon and thermodynamical properties of novel metal carbide, platinum carbide (PtC) is reported within the density functional theory scheme. The ground state properties such as lattice constant, elastic constants, bulk modulus, shear modulus and finally the enthalpy of PtC in zinc blende (ZB) and rock-salt (RS) structures are determined. The energy band structure and electron density of states for the two phases of PtC are also presented. Of these phases zinc blende phase of PtC is found stable and phase transition from ZB to RS structure occurs at the pressure of about 37.58 GPa. The phonon dispersion curves and phonon DOS are also presented. All positive phonon modes in phonon dispersion curves of ZB-PtC phase indicate a stable phase for this structure. Within the GGA and harmonic approximation, thermodynamical properties are also investigated. All results reveal that the synthesized PtC would favor ZB phase. The compound is stiffer and ductile in nature. © 2011 Elsevier B.V. All rights reserved.

Rathod N.,Bhavnagar University | Rathod N.,Vadodara Institute of Engineering | Gupta S.D.,Vadodara Institute of Engineering | Gupta S.K.,Vadodara Institute of Engineering | Jha P.K.,Vadodara Institute of Engineering
Solid State Phenomena | Year: 2011

A detailed theoretical study of structural, electronic and vibrational properties of niobium carbide are carried out in rocksalt phase using the density functional theory implemented in ABINIT code. The calculated structural parameters like lattice constant and bulk modulus agree well with the available data. The Zener anisotropy factor (A), Poison's ratio (v), Young's modulus (Y) and shear modulus (C′) are also presented. The electronic band structure and density of states are presented and discussed in light of bonding nature in NbC. The band structure indicates its metallic nature. The calculated phonon dispersion curves show that the NbC in rocksalt phase has all positive phonons throughout the Brillouin zone. The thermodynamical properties are also presented and discussed. © (2011) Trans Tech Publications, Switzerland.

Soni H.R.,Bhavnagar University | Rathod N.,Bhavnagar University | Rathod N.,Vadodara Institute of Engineering | Gupta S.K.,Bhavnagar University | Jha P.K.,Bhavnagar University
Journal of Physics: Conference Series | Year: 2012

The Yb-pnictides have drawn considerable interest in the field of solid state and material science due to it's diverge applications in the properties like electronic, magnetic, optical and phonon. These compounds have got keen interest due to its partially filled 4f bands. In the frame work of density functional theory (DFT), we determine structural, electronic, lattice dynamical and elastic properties of Yb-pnictides (YbX, X= N, P, As) in rocksalt (RS) phase using first-principles density functional theory (DFT) simulations based with a generalized gradient approximation (GGA) of the exchange correlation energy implemented in ABINIT package.

Shah B.,Vadodara Institute of Engineering | Dave K.,Ahmedabad
ACM International Conference Proceeding Series | Year: 2016

VoIP applications are extensively used in current scenario. VoIP Security is very important aspect with increasing use of VoIP Applications such as Skype.SIP (Session Initiation Protocol) faces some security issues such as malicious SIP Packets, Malformed SIP Packets etc. Security measures to eliminate this risk include provision of cryptographic measures like TLS, DTLS etc. which are not up to mark as they provide only confidentiality. Hence through this paper effort has been made to provide SIP security through rule matching engine. © 2016 ACM.

Bhavsar H.H.,Vadodara Institute of Engineering
2014 International Conference on Computation of Power, Energy, Information and Communication, ICCPEIC 2014 | Year: 2014

The Multifunctional Gateway Sensor Node is an extension of the Gateway sensor node of Wireless Sensor Network having multiple functionalities. Addendum of functionalities comprise different types of technologies which are LCD Color display, keypad to operate Gateway Node, AVR camera and solar panel for additional power support. The node itself also acts as a weather station based on Fuzzy AHP for precise decision support. So the main idea behind this research is to operate WSN without computer. It will be most usable in agriculture, forest monitoring as well as marine securities when pc is unavailable. The location of particular place for weather station feature will be selected by the help of Koppen Classification, instead of GPS. This sensor node is also operable by the specially designed java based software having great intelligence as per the locality. Hence the paper presents the idea about the proposed research area. © 2014 IEEE.

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