MICROCONTROLLER BASED POWER TRANSFORMER PROTECTION SYSTEM

MICROCONTROLLER BASED POWER TRANSFORMER PROTECTION SYSTEM

ABSTRACT

The main intention of this project is to design a microcontroller based system that can be used in power transformer protection. The system checks the operating parameters of the transformer i.e. current and reports the quantity that is flowing through the transformer. The system is designed such that it is able to detect currents above the normal operating level and isolate the power transformer from the distribution line. This isolation process is to ensure that the transformer is safe from any excess current levels that can make it to overheat thus get damaged. It gives a solution to the need to reduce cost of maintenance and ensure that supply of electricity to consumers is not interrupted for long periods taken while repairing or replacing destroyed transformers.

A current sensor ACS712x series has been used in this project as the interfacing instrument between the power transformer and the PIC16F690 microcontroller. The PIC16F690 controls all operations that the device does. A relay and a contactor have been used as the switching gears to isolate the transformer from the power system in case a fault occurs. A monochrome LCD has been used to show system current readings and indicate cases of over-current fault. To warn an operator of a fault occurrence, LEDs and a piezoelectric buzzer have been used. All these peripheral devices depend on the microcontroller to make them operate or otherwise. Some of the tools used in this project include MPLAB – programming software used to write the program for the microcontroller used in this project. Proteus- simulation software has also been used to test whether the design works appropriately before its implementation on hardware. Pickit3- has been used to load program into the microcontroller using MPLAB.

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DESIGN AND CONSTRUCTION OF CONCRETE FRAME STRUCTURE FOR REIDENTIAL BUILDING

INTRODUCTION

Without water survival is impossible. Water is one of the most important substances on earth. All plants and animals must have water to survive. If there was no water there would be no life on earth. As water is very precious and due to the scarcity of drinking water in day to day life one has to take care of every drop. A water tank is used to store water for daily requirements like drinking, washing etc. An elevated water tank is a large water storage container constructed for the purpose of holding water supply at certain height to provide sufficient pressure in the water distribution system. Liquid storage tanks are used extensively used by municipalities and industries for storing water, inflammable liquids and other chemicals. These tanks have various types of support structures like RC braced frame, steel frame, RC shaft, and even masonry pedestal. The most commonly used staging in practice is the frame type. The main components of this type of staging are columns and braces. The staging acts like a bridge between the overhead container and foundation to transfer loads acting on the tank. Thus Water tanks are very important for public utility and for industrial structure and also to withstand more design forces. The frame support of the ELSR should have adequate strength to resist axial loads, moment and shear force due to lateral loads. These forces depend upon total weight of the structure, which varies with the amount of water present in the tank container.

 

 

  • TYPES OF WATER TANKS

 

The water tanks are majorly classified into water tank resting on ground, under the ground and the water tank about the ground. Based on the shape, water tanks are majorly circular rectangular and triangular shape. Elevated tanks are supported on staging which may consist of masonry walls, R.C.C. tower or R.C.C. columns braced together. The walls are subjected to water pressure. The base has to carry the load of water and tank load. The staging has to carry load of water and tank. The staging is also designed for wind forces. From design point of view the tanks may be classified as per their shape- rectangular tanks, circular tanks, intz type tanks. Spherical tanks conical bottom tanks and suspended bottom tanks. A circular shaped ELSR is adopted in this project for AITS College, Boyanpalli, Rajampeta, in Kadapa district in Andrapradesh

 

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Predicting Diabetes Using Machine Learning Technique (Support vector Machine )

Predicting Diabetes using machine learning technique (Support vector machine )

Abstract

Diabetes mellitus is one of the most serious health challenges in both developing and developed countries. According to the International Diabetes Federation, there are 285 million diabetic people worldwide. This total is expected to rise to 380 million within 20 years. Due to its importance, a design of classifier for the detection of Diabetes disease with optimal cost and better performance is the need of the age.The proposed method uses Support Vector Machine (SVM), a machine learning method as the classifier for diagnosis of diabetes. The machine learning method focus on classifying diabetes disease from high dimensional medical dataset. The experimental results obtained show that support vector machine can be successfully used for diagnosing diabetes disease.

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DESIGN AND IMPLEMENTATION OF CAMPUS WIDE WIRELESS NETWORK

DESIGN AND IMPLEMENTATION OF CAMPUS WIDE WIRELESS NETWORK

CHAPTER ONE

1.0     BACKGROUND:

 

Wireless networks have significantly impacted the world, since their initial deployment. Wireless networks have continued to develop and their uses have significantly grown. Cellular phones are nowadays part of huge wireless network systems and people use mobile phones on a daily basis in order to communicate with each other and exchange information. Recently, wireless networks have been used for positioning as well, in order to enable the provision of location oriented services to the end-user. Different types of measurements available during standard network and terminal operation, mainly for resource management and synchronization purposes, can be employed to derive the user’s location. With these numerous uses of wireless network, this project will focus on resources sharing dedicated network. A professor at the University of Hawaii, Norman Abramson developed the world’s first wireless computer communication network, ALOHAnet (operational in 1971), using low-cost ham-like radios. The system included seven computers deployed over four islands to communicate with the central computer on the Oahu Island without using phone lines. WLAN hardware initially cost so much

 

that it was only used as an alternative to cabled LAN in places where cabling was difficult or impossible. Early development included industry- specific solutions and proprietary protocols, but at the end of the 1990s these were replaced by standards, primarily the various versions of IEEE

802.11 (in products using the Wi-Fi brand name). An alternative ATM-like 5 GHz standardized technology, HiperLAN/2, has so far not succeeded in the market, and with the release of the faster 54 Mbit/s 802.11a (5 GHz) and 802.11g (2.4 GHz) standards, it is even more unlikely that it will ever succeed. In 2009 802.11n was added to 802.11. It operates in both the

2.4 GHz and 5 GHz bands at a maximum data transfer rate of 600 Mbit/s.

 

Most  new   routers  are  able  to  utilize  both  wireless  bands,  known   as dualband.   This  allows  data  communications  to  avoid   the  crowded

2.4 GHz    band,    which    is    also    shared    with Bluetooth devices    and microwave ovens. The 5 GHz band is also wider than the 2.4 GHz band, with more channels, which permits a greater number of devices to share the space. Not all channels are available in all regions.

A wireless local area network (WLAN) links two or more devices using some  wireless  distribution  method  (typically spread-spectrum or OFDM radio), and usually providing a connection through an access point to the wider Internet. This gives users the ability to move around within a

 

local coverage area and still be connected to the network. Most modern WLANs are based on IEEE  802.11 standards,  marketed  under  the Wi-  Fi brand name. Wireless LANs have become popular in the home due to ease of installation, and in commercial complexes offering wireless access to their customers; often for free. New York City, for instance, has begun a pilot program to provide city workers in all five boroughs of the city with wireless Internet access. Likewise, Muritala International Airport, Lagos has free wireless internet access for passenger travelling.

           STATEMENT OF PROBLEM

 

Most of us have become accustomed to the limitations that come with a wired network. When we want to check our email or print a report we find ourselves confined to a certain location or cramped space. In the past few years, the growing popularity of wireless communication has caught the attention of corporate, manufacturing, and academic settings. Wireless network technology has proven it can deliver the benefits of a wired network with the added benefit of computing freedom and share resources.

           MOTIVATION

 

There is existing LAN connection but there are some features its lacking which inspired me to implement this project. There is no share

 

printer/resource; no   dedicated network  irregularities  etc.,   upon completion of this project, all of these drawbacks would be taken care of.Download Full Material-N5000