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(11-16) Electrical and Electronics B.Tech Seminar Full Report

Electrical and Electronics B.Tech Seminar Full Report of

Ultra High Efficiency Distribution Transformers

ABSTRACT

 

This paper presents how Amorphous Metal Core Distribution Transformers (AMDT) will play a vital role in improving energy efficiency in global power distribution and also highlights the environmental impact of using AMDT in the electrical distribution system. AMDT provides a sustainable approach when capitalized losses and environmental impacts are considered. ABB’s AMDT have the potential to reduce transformer no-load losses by up to 70% compared to conventional technology. This paper discusses the general aspects of AMDT transformer losses, in both liquid-filled and dry-type, and the effect on total owning cost. Several case studies of the economical and environmental benefits are presented. Applications where using AMDT is most beneficial, such as in renewable energy generation, are also presented. The effect of loading factor and the benefit of using AMDT is discussed..

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Electrical and Electronics B.Tech Seminar Full Report of

 

UWB RADAR FOR RAILWAY FALL ON TRACK OBJECT DETECTION AND IDENTIFICATION

ABSTRACT

 

This paper presents a new system for detecting and identifying objects fallen onto railway tracks. The proposed solution is based on an ultra-wideband (UWB) radar technique combined with a long travelling wave radiating microwave transmission line. This line is maintained adequately all along the railway station platform. Scheduled steps for system realization are presented. A preliminary analysis of different transmission lines which could be used and their performance is provided. Automatic Target Recognition (ATR) application, which describes identification procedure, is discussed. An overview of extraction methods is provided and a procedure of selection of contributing poles is presented. Available target identification techniques based on UWB pulse are analyzed and compared to experimental results.

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Electrical and Electronics B.Tech Seminar Full Report of

A NEW SENSORLESS CONTROL FOR THE SWITCHED

RELUCTANCE MACHINE

ABSTRACT

   This paper presents a new method for determination of the rotor position of the Switched Reluctance Machine (SRM). With this it is possible to eliminate the use of the positions encoder, which is usually necessary to control the SRM. The method is based on a machine model, which includes the phase voltage equation. It can be calculated in real time. Additionally for better dynamic performance a new digital control loop is proposed. The advantages of this method are simplicity, it requires low computation time, and it gives accurate sensorless rotor position for motor operation as well as generator operation.

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Electrical and Electronics B.Tech Seminar Full Report of

High Impedance Fault Detection

On Rural Electric Distribution Systems

ABSTRACT

 

A high impedance fault (HIF) results when an energized primary conductor comes in contact with a quasi-insulating object such as a tree, structure or equipment, or falls to the ground. The significance of these previously undetectable faults is that they represent a serious public safety hazard as well as a risk of arcing ignition of fires.

A high impedance fault is characterized by having impedance sufficiently high that it is not detected by conventional over current protection, such as fuses and over current relays. Unlike low impedance short circuits, which involve relatively large fault currents and are readily detectable by conventional over current protection, these HIFs represent little threat of damage to power system equipment. High impedance faults produce current levels in the 0 to 50 ampere range. Typically, an HIF exhibits arcing and flashing at the point of contact. Throughout the utility industry, there have been differences of opinion on how often HIFs occur. Normally, utilities do not keep good records on the number of down conductor instances. It is seldom recorded on trouble reports unless it results in a fuse or breaker operation. While it is likely that only a few percent (5-20%) of all distribution faults are high impedance faults, means exist to detect a high percentage of HIFs.

The detection of high impedance faults on rural electrical distribution systems has been one of the most persistent and difficult problems facing the electric utility industry. Advances in digital technology have enabled practical solutions for the detection of a high percentage of these previously undetectable faults. This paper will review several methods of detecting high impedance faults. The issues and application of this technology will also be discussed. Field experience using digital technology will be also reviewed.

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Electrical and Electronics B.Tech Seminar Full Report of

 

ISSUES IN THE CONTROL OF THE SWITCHED RELUCTANCE

MOTOR DURING CONTINUOUS CONDUCTION

 

 

ABSTRACT

 

Previous work has shown that the constant power speed range (CPSR) of the switched reluctance motor is infinite when continuous conduction is allowed during high-speed operation Control required to achieve this, can be similar to low speed control commonly used for SRM motors such as setting an advance angle, a dwell angle and a set point for a current regulator. Dwell interval slightly greater than 50% of the duration of each stroke, insures sustainable continuous conduction and current buildup to current regulator set point. It is shown that there is a clear optimum advance angle which maximizes the energy conversion. Developed power can be controlled by raising or lowering the current regulator set-point. As developed power is proportional to the motor current magnitude, high efficiency under full as well as partial load conditions is achieved. Maximum steady state efficiency can be achieved by using minimum dwell but the dynamic response may be sluggish. It is shown that dynamic response can be increased by temporary increases in dwell, and once a new steady state is reached, dwell can be set back to the minimum value to maximize the efficiency.

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Electrical and Electronics B.Tech Seminar Full Report of

CRUISE CONTROL DEVICES

 

ABSTRACT

 

The concept of assisting driver in the task of longitudinal vehicle control is known as cruise control. Starting from the cruise control devices of the seventies and eighties, now the technology has reached cooperative adaptive cruise control. This paper will address the basic concept of adaptive cruisecontrol and the requirement to realize its improved versions including stop and go adaptive cruise control and cooperative adaptive cruise control. The conventional cruise control was capable only to maintain a set speed by accelerating or decelerating the vehicle. Adaptive cruise control devices arecapable of assisting the driver to keep a safe distance from the preceding vehicle by controlling the engine throttle and brake according to the sensor data about the vehicle. Most of the systems use RADAR as the sensor .a few use LIDAR also. Controller includes the digital signal processing modules and microcontroller chips specially designed for actuating throttle and brake. The stop and go cruise control is for the slow and congested traffic of the cities where the traffic may be frequently stopped. Cooperative controllers are not yet released but postulations are already there. This paper includes a brief theory of pulse Doppler radar and FM-CW LIDAR used as sensors and the basic concept of the controller.

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