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Nireekshana T.,VNRVJIET | Kesava Rao G.,Vasireddy Venkatadri Institute of Technology | Siva Naga Raju S.,Jawaharlal Nehru Technological University Kakinada
International Journal of Electrical Power and Energy Systems | Year: 2012

Determination and enhancement of Available Transfer Capability (ATC) are important issues in deregulated operation of power systems. This paper investigates the use of FACTs devices, like SVC and TCSC, to maximize power transfer transactions during normal and contingency situations. ATC is computed using Continuation Power Flow (CPF) method considering both thermal limits and voltage profile. Real-code Genetic Algorithm (RGA) is used as an optimization tool to determine the location and controlling parameters of SVC and TCSC. The suggested methodology is tested on IEEE 14-bus system and also on IEEE 24-bus reliability test system for normal and different contingency cases. © 2012 Elsevier Ltd. All rights reserved. Source


Shaik A.M.,Vasireddy Venkatadri Institute of Technology | Rao V.V.S.K.,Andhra University | Rao C.S.,Andhra University
International Journal of Advanced Manufacturing Technology | Year: 2014

Manufacturers throughout the world are facing major new challenges, including shorter product life cycles and increasing competition. As companies strive to rationalize engineering design, manufacturing, and support processes and to produce a large variety of products at lower costs, modularity is becoming a focus. This paper reviews the methodologies for determining modular manufacturing systems while considering cost and performance. The manufacturing concept, termed modular production systems and modular manufacturing systems are aimed specifically at “hard” low to medium technology products, as typified by goods such as children’s toys and kitchen appliances. It was proposed to increase the flexibility of the manufacturing operation in terms of its range of function, product, and service by modularizations and its ability to be easily reconfigured in the face of changing conditions. © 2014, Springer-Verlag London. Source


Krishna T.V.,Vasireddy Venkatadri Institute of Technology | Sastry S.S.,Acharya Nagarjuna University | Murthy V.R.K.,Indian Institute of Technology Madras
Indian Journal of Physics | Year: 2011

The dielectric relaxation studies on polar binary mixtures of N-methyl aniline with, alcohols, propan-1-ol and isopropyl alcohol have been carried out, at different temperatures and mole fractions, using - LF impedance analyzer, Plunger method and Abbe's refractometer in radio, microwave and optic frequency regions respectively. Kirkwood effective correlation factor, corrective Kirkwood correlation factor, Bruggeman parameter, relaxation time and thermodynamical parameters are calculated using the experimental data. Conformational analysis of the formation of hydrogen bond in the equi molar binary mixture systems of N-methyl aniline with propan-1-ol and isopropyl alcohol is supported by experimental and theoretical FT-IR values. © 2011 IACS. Source


Krishna T.V.,Vasireddy Venkatadri Institute of Technology | Sastry S.S.,Acharya Nagarjuna University | Murthy V.R.K.,Indian Institute of Technology Madras
Indian Journal of Physics | Year: 2011

The dielectric and thermodynamic studies on polar binary mixtures of N-methyl aniline with alcohols - propan-1-ol and propan-2-ol have been carried out, at different temperatures and mole fractions. LF impedance analyzer, Microwave bench and Abbe's refractometer are used respectively in radio, microwave (X-Band) and high frequency regions to determine the dielectric data. The experimental data is used to correlate the dielectric and thermodynamic parameters - static permittivity, high frequency permittivity, Kirkwood effective correlation factor, corrective Kirkwood correlation factor, excess permittivity, excess Helmholtz free energy, dipole moment, excessive dipole moment, relaxation time, excess inverse relaxation time and the excess thermodynamic parameters. These parameters are used to interpret the molecular interactions between the molecular species of the liquid mixtures. © 2011 IACS. Source


Vijaya Krishna T.,Vasireddy Venkatadri Institute of Technology | Madhu Mohan T.,Hindu College Techno Campus
Journal of Chemical Thermodynamics | Year: 2012

Molecular interactions between the polar systems N-methyl aniline and alcohols (propan-1-ol/propan-2-ol) for various mole fractions at different temperatures are studied by determining the dielectric permittivity using LF impedance analyzer, Microwave bench and Abbe's refractometer in radio, microwave and optic frequency regions respectively. The dipole moment, excess dipole moment, excess Helmholtz energy, excess permittivity, excess inverse relaxation time and excess thermodynamic values are calculated using experimental results. The optimized geometry, harmonic vibrational wave numbers and dipole moments of pure and equimolar binary mixtures have been calculated theoretically from the ab initio Hartree-Fock (HF) and Density Functional Theory (DFT - B3LYP) methods with 6-31+G and 6-311+G basis sets using Spartan 08 modelling software. Conformational analysis of the formation of hydrogen bond in the equimolar binary mixture systems of N-methyl aniline and alcohols (propan-1-ol/propan-2- ol) is supported by experimental FT-IR spectra. The calculated wave numbers and dipole moments agree well with the experimental values. Further, the correlations among the parameters are discussed in detail. © 2011 Elsevier Ltd. All rights reserved. Source

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