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A Novel Method to Analyse the Effects of Geomagnetic Induced Current on Transformer
Roshni. R. Jethani ; Dr. Harikumar Naidu
Integrated Power System
Year: 2016, Volume:3, Issue : 7
Pages: 1 - 6
Geomagnetic induced currents are generated on the power system by solar storms and solar flare, which causes damages to power transformer. GIC (DC) current when enter the power grid through the neutral point of transformer causes saturation of the transformer and the transformer gets damaged hence a novel hardware model was fabricated and the effects were analyzed. A software simulation was done using MATLAB and the effects on power transformer were observed to be increase in reactive power consumption and fluctuating harmonics in neutral current and the excitations current. Were analyzed which has got significance in the practical field to give warnings before the occurrence of the damage to the transformer and the subsequent interruption of power supply.
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Development of SMPS for Medium Voltage Electrical Drives
Modi Ankitkumar Bipinchandra ; Makavana Rakesh V.; Patel Jay N.; Bhavsar Priyank R.; Makwana Dharmistha V.
Electrical Engineering
Year: 2016, Volume:3, Issue : 7
Pages: 7 - 12
In this paper, an effort has been made to develop a compact multiple output SMPS for control circuitry and driver section of Medium Voltage Medium Power Electrical Drives. SMPS generates multiple outputs regulated and isolated +5 V, +24 V, +/-15 V and five +24 V isolated output voltages. Continuous Conduction Mode and Discontinuous Conduction Mode are described. The SMPS is developed using Fly-back converter and performance of SMPS is observed in terms of Line, Load and Cross regulation.
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Comparative Design and Analysis of Self Supporting and Guyed Steel Chimney
K. Kayalvizhi ; R. Boopathiraja; R. Vanathi
Civil Engineering
Year: 2016, Volume:3, Issue : 7
Pages: 13 - 21
The area proposed for the construction of this chimney is at an industry in Metter. They have already provided 43m self-supporting steel chimney. In addition to that, analysis and design of 72m steel chimney (Self-supporting Vs Guyed) for eco-friendly purpose. Here we design and analysis a steel chimney having a height of 72m steel chimney and structural elements of the chimney such as foundation are designed. By comparing the moments of self-supporting steel chimney and guyed steel chimney from manual design. The base moment of guyed steel chimney is less than the self-supporting steel chimney and hence Guyed Steel Chimney is safe at that site.
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Control and Simulation of Hybrid Microturbine Smartgrid System
Selvakumar. S ; Dr. B. JeyaChandran; M. Aruna
Electrical and Electronics Engineering
Year: 2016, Volume:3, Issue : 7
Pages: 22 - 29
This paper presents a simulation model of the electric part of a grid connected micro turbine (MT). Analyses of load following behaviour of micro turbine as distribution energy resource have been performed the model representation of the main components of the electric system that are the permanent magnet synchronous machine, fuel control temperature control and speed control. The micro turbine is controlled so that the energy is exchanged with unity displacement factor. The simulation results obtained with the model using SimPower Systems software the simulation model is used to analyze the micro turbine the model is built from the dynamics of each part with their interconnections. This simplified model is a useful tool for studying the various operational aspects of micro turbines. The performance of developed model is studied by connecting it to an isolated load.
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Nonlinearity Error Compensation of Venturi Flow Meter Using Evolutionary Optimization Algorithms
S. Murugan ; Dr. SP. Umayal; Dr. K. Srinivasan; M.Aruna
Electrical Engineering
Year: 2016, Volume:3, Issue : 7
Pages: 30 - 39
Linearization of sensor is one of the significant issues that must always be considered to guarantee a measurement system’s accuracy. Often in the progress of linearization, certain other errors also minimized. It is necessary for most of the sensor systems to have a linear performance. But since in practice there are some factors which brings non-linearity in a system. This paper focuses on the compensation of problems faced due to the non- linear response characteristics of venturi. The evolutionary algorithms used in this work are extreme learning machine (ELM), differential evolution (DE) and artificial neural network trained by genetic algorithm (GA-ANN). These algorithms when connected in series with the sensor offers extended linearity characteristics. The overall system provides accurate measurement for the whole range. A computer simulation is carried out using the experimental dataset of venturi sensor. It is observed that ELM method yields the lowest training time of zero seconds to obtain best linearity in the overall response when compared to others. At the same time DE algorithm and GA-ANN produces the lowest MSE value and better linearity. The proposed algorithm offers a less complexity structure and simple in testing and validation procedure. This hybrid technique is used to make a sensor output as more linear as possible. Further this adaptive algorithm is preferable for real time implementation also.
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Accelerating Unique Strategy for Centroid Priming in K-Means Clustering
Ms. S. Saranya ; Ms. P. Deepika; Ms. S. Sasikala; Dr. S. Jansi; Ms. A. Kiruthika
Computer Science and Engineering
Year: 2016, Volume:3, Issue : 7
Pages: 40 - 47
Clustering is the process of organizing data objects into a set of disjoint classes called clusters. The fundamental data clustering problem may be defined as discovering groups in data or grouping similar objects together. Some of the problems associated with current clustering algorithms are that they do not address all the requirements adequately, and need large number of iterations when dealing with a large number of dimensions. K-Means is one of the algorithms that solve the well-known clustering problem. This algorithm classifies object to a predefined number of clusters, which is given by the user. The idea is to choose random cluster centers, one for each other. The centroid initialization plays an important role in determining the cluster assignment in effective ways. But the performance of K-Means clustering is affected when the dataset used is of high dimension and the accuracy and sum square error is highly affected because of the high dimension data. This paper, proposed a new algorithm of data partitioning based k-means for performing data partitioning along the data axis with the highest variance. This will shows more effective and efficient converge to better clustering results, reduce the number of iterations required clustering also help to reduce the sum square error for all cells than the existing clustering.
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An Analysis of Economic Benefits of Solar Tracking Systems
Abhijit Kumar Bhagat
Renewable Energy
Year: 2016, Volume:3, Issue : 7
Pages: 48 - 51
One hour of solar energy is enough to meet the energy demand of entire Earth’s population for one year. When the solar radiation reaches earth’s top atmosphere it is relatively constant everywhere but the radiation near earth’s surface may vary considerably due to the reasons like atmospheric effects, such as absorption and scattering, local variations in the atmosphere, such as water vapour, clouds, and pollution, latitude of the location; and the season of the year and the time of day. All of these factors can change other parameters, such as, power received from solar radiation at a place, the spectral content of the light and the angle from which light is incident on a surface that as a consequence affects the efficient working of a solar cell. One way to overcome this limitation of solar cells is to maintain the optimal solar PV array orientation and tilt using solar trackers, which can maximize the power output from a solar cell. Certainly, there are associated technical and economic limitations in using solar tracking devices that need to be carefully evaluated before its use. There is no general rule to evaluate the technical and economic efficiency of a solar tracker, as its effectiveness varies place to place, time to time. However it is well established that the energy produced form a fixed amount of installed PV generating capacity can be significantly increased using the solar tracking technology. Much implementation has not been done in India with the Solar Tracking Systems so far. Keeping that point in mind this paper discusses the Economic benefits of Solar Tracking Systems by analyzing the implementations in US.
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Investigation of Physico-Chemical Characteristics of Bennethora River and Mapping using GIS Application
Harshavardhana ; M. Anwarullah; Jayamala; Sunilkumar; Mohammad. Aleem
Civil Engineering
Year: 2016, Volume:3, Issue : 7
Pages: 52 - 56
BENNETHORA is a major irrigation project at Heroor.K village designed to irrigate 20,234 hectares of land in drought –prone Chittapur and Sedam taluk of Kalaburagi district. The study area of BENNETHORA reservoir is located at 28km away from Kalaburagi city. BENNETHORA River (Krishna Basin) this reservoir spreads over area of 45sq.miles. The sampling points were collected from the reservoir and mappings were carried out using GIS application. GIS software provides the functions and needed to store, analyze and display geographic information. GIS softwares in use tools are ARC/ AutoCAD Map etc. The water samples were collected and brought to laboratory for further analysis and analyzed for physico-chemical parameters such as pH, Turbidity, Fluoride, Chloride and Hardness.
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Design and Analysis of Hydraulic Press using ANSYS
Satish B Mariyappagoudar ; Vishal S Patil
Mechanical Engineering Design
Year: 2016, Volume:3, Issue : 7
Pages: 57 - 60
The Seperation of cotton seed from cotton is very important for the further use of the cotton for varies industries. The process of separating the cotton seed from cotton is called ginning and converting the cotton lint into bail is know as pressing. The machine which is used for the pressing operation is known as hydraulic press as it is powered by hydraulic liquids. The frame structure has to withstand the the forces generated while pressing operation and it is essential to calculate mechanical properties like total deformation and stress developed on the machinery. Hence, here the work has been being carried out on 10 TON press machine .Design is done in CATIA V5 and analysis is carried out in ANSYS workbench 14.5.
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A Study on Mechanical Properties and Durability Studies fibre Reinforced High Strength of Concrete
Datla Karthik Varma ; P J D Anjaneyulu; M K M V Ratnam; U Ranga Raju
Civil Engineering
Year: 2016, Volume:3, Issue : 7
Pages: 61 - 69
The term high-strength concrete (HSC) is generally used for concrete with compressive strength higher than 41MPa. ACI Committee had defined High Strength Concrete (HSC) is the concrete that can attain specified compressive strength for design of at least 41MPa, or more. With the development of high grade cement and availability of proper mineral admixtures and chemical admixtures, it has become quite common to adopt concrete with compressive strength of 60MPa and above. Development of high strength concrete has made it possible to build taller and long span structures. But it has been proved that the comparatively higher compressive strength of High Strength Concrete is an attractive profit from engineering characteristics and economic point of view whereas, the strength behaves against the ductility of concrete by welcoming brittleness pronouncedly. To improve the ductility of High Strength Concrete, a strategy is to introduce steel in High Strength Concrete which results in development of a material with reasonable tensile strength and greater toughness which prevents the initiation and propagation of cracks. Plain concrete and High Strength Concrete possess a very low tensile strength, limited ductility and little resistance to cracking. Internal micro cracks are present in the concrete and its poor tensile strength is due to the propagation of such micro cracks. In plain concrete, structural cracks (micro-cracks) develop even before loading, due to drying shrinkage or other causes of volume change. The width of these initial cracks is few microns, but their other dimensions may be of higher magnitude. When loaded, the micro cracks propagate and open up, and additional cracks form in places of minor defects. The development of such micro cracks is the main cause of inelastic deformations in concrete. The addition of small closely spaced and uniformly dispersed fibers to concrete would act as crack arrester and would substantially improve its static and dynamic properties. This type of concrete is known as Fiber Reinforced Concrete.
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Abstract
