Seminar Corner

Working Principles Of Polydyne Cams and High Speed Cams

2013-12-20T20:41:00.002+05:30

Working and application of Polydyne cam systems

Basically, the purpose of a camshaft in an internal combustion engine is to open and close the valves in correct sequence. In the Otto four-cycle engine, this sequence is timed in relation to the crankshaft and pistons. The ultimate objective of the cam-shaft function is to "trap" the greatest possible weight of fuel/air mixture in the cylinders to attain 100% volumetric efficiency.

By applying the "Polydyne" formula, it was possible for the first time to design the ca shape to provide the desired valve action. This revolutionary system of cam design recognizes the fact that flexibility cannot be reduced or eliminated but, can be compensated for. However, with the advances through the years in Cylinder Head porting and induction system design, the "Polydyne" Camshafts eventually reached their design limitation

What is polydyne cam or polynomial cam ?

Design Of polydyne cams

Cam and follower relations for polydyne cams

Cam profile generation of polydyne cams and High speed cams

Derivation for polydyne cam lift

Mathematical representation for polydyne cam

Application of high speed cams

Advantages of polydyne cams

Vibration response of polydyne cam

How to solve polydyne cam problems

Drawing polynomial cam profiles

Polydyne cam ppt,Polydyne pdf

Click Here To Download Seminar On Polydyne Cams

Effect Of Springback In Metals

2013-12-20T20:16:00.001+05:30

Seminar On Springback In Materials

Springback from the formed state has been a subject of major concern in the design of sheet metal panels. The amount of springback is generally estimated by assuming an entirely elastic recovery process and using the established values of elastic modulus and Poisson’s ratio. It is demonstrated that inelastic strain release from the formed state can be a major source of additional strain recovery, the magnitude of which depends on the forming stress state.

Fabrication of sheet metal stampings introduces complex plastic deformations into the metal. When the punch and die loads are removed after a forming step,a portion of the deformation recovers causing a change in the part shape. Although this springback strain is generally assumed to be elastic, it is well known that anelastic strain is present during loading and unloading and leads to hysteresis behavior(energy loss) in metals. The magnitude of springback, which is studied carefully in this work (and in prior studies), has been shown to be related to the forming strain and has a significant impact on the final dimensions of stampings.

What Is Spring Back ?

Definition For Springback

How springback induced in metals

Springback and residual stresses in Metals

Springback behaviour of materials

Springback consideration in Form Designing

Material spring back and Forging

Improving Springback of metals

Advantages and Disadvantages of Springback in metalas

Design considerations towards springback in metals

Spring back pdf,Springback ppt,Springback Slide presentation

Click Here To Download Seminar On SpringBack

Working and Application Of Air Springs

2013-12-20T19:53:00.002+05:30

Use of Air springs in Automobiles
Main Components of Air springs
Types Of Air Springs
Advantages of Air springs over conventional springs
Design considerations for Air springs
Selection of Air springs and criteria of Air spring selection
Manufacturing of Air springs
Special uses of Air spring systems
Non-Conventional springs
Air Spring Seminar Report,Air spring PDF,Air Spring ppt,Air spring Slide Presentation

Click Here To Download Full Seminar On Air Springs

Photoelectron Spectroscopy Seminar Report

2013-09-10T12:32:00.001+05:30

Working and Applications Of Photoelectron Spectroscopy

Photoelectronspectroscopyisthemostpowerfulandversatiletechniquetostudytheelectronicstructureofthevalencebandsinatoms,such as:

> Emitte delectronparameters

> Kineticenergy

> Emissionangles

> Spinpolarization

> Incidentphotonparameters

> Photonenergy(hν)

> Angleofincidence

> Polarization

> Chemisorption Studies

XPS was developed in the mid 1960s by K. Siegbahn and his research group. K. Siegbahn was awarded the Nobel Prize for Physics in 1981 for his work in XPS. The phenomenon is based on the photoelectric effect outlined by Einstein in 1905 where the concept of the photon was used to describe the ejection of electrons from a surface when photons impinge upon it. For XPS, Al Kalpha (1486.6eV) or Mg Kalpha (1253.6eV) are often the photon energies of choice. Other X-ray lines can also be chosen such as Ti Kalpha (2040eV). The XPS technique is highly surface specific due to the short range of the photoelectrons that are excited from the solid. The energy of the photoelectrons leaving the sample are determined using a CHA and this gives a spectrum with a series of photoelectron peaks. The binding energy of the peaks are characteristic of each element. The peak areas can be used (with appropriate sensitivity factors) to determine the composition of the materials surface. The shape of each peak and the binding energy can be slightly altered by the chemical state of the emitting atom. Hence XPS can provide chemical bonding information as well. XPS is not sensitive to hydrogen or helium, but can detect all other elements. XPS must be carried out in UHV conditions.

Click Here To Download Photoelectron Spectroscopy Seminar Report and PPT

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Introduction To Chemometrics:Application Of Chemometrics In Engineering

2013-09-09T21:13:00.001+05:30

Chemometrics Seminar Report With PPT

Chemometrics is a data collection task, whether in science, business or engineering, typically involves many measurements made on many samples. Such multivariate data has traditionally been analyzed using one or two variables at a time. However, this approach misses the point; to discover the relationships among all samples and variables efficiently, we must process all of the data simultaneously. Enter chemometrics. Chemometrics is the field of extracting information from multivariate chemical data using tools of statistics and mathematics. Chemometrics is typically used for one or more of three primary purposes:

To explore patterns of association in data;
To track properties of materials on a continuous basis; and
To prepare and use multivariate classification models.

Chemometrics is a natural partner for near infrared (NIR) spectroscopy, but also finds application in many other analytical techniques. IM Publications has published a best-selling and widely referenced introduction: A User-Friendly Guide to Multivariate Calibration and Classification, witten by Tormod Næs, Tomas Isaksson, Tom Fearn and Tony Davies. All of the "4Ts" are not only experts in chemometrics, but also recognised for their ability to convey the important aspects in an easily comprehensible way, with minimal recourse to matrix algebra.

>Fundamentals Of Chemometrics

>History of chemometrics

>Application of chemometrics

>Illustration of chemometrics with examples

>Chemometrics In Engineering

>Chemometrics Softwares

Click Here To Download Chemometrics Seminar Report

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Manufacturing of Aluminium Matrix Composite Materials

2013-09-09T12:57:00.000+05:30

Aluminium Matrix Composite Materials Seminar Report

An increased interest is observed in last years in metal matrix composite, mostly light metal based, which have found their applications in many industry branches, among others in the aircraft industry, automotive-, and armaments ones, as well as in electrical engineering and electronics, etc.Aluminium based composite materials are leading ones in this area, they are fabricated using many methods, including powder metallurgy processes, and then formed, e.g., by hot extrusion. Powder metallurgy makes materials properties relatively easy to control by mixing materials with different properties in various proportion.

The metal matrix composite can be reinforced with particles, dispersoids or fibres. However, the biggest interest in composite materials is observed for those reinforced with hard ceramic particles due to the possibility of controlling their tribological-, heat- or mechanical properties by selection of the volume fractions, size, and distribution of the reinforcing particles in the matrix .They are used more often, compared with the composite materials of other metals, due to the broad range of their properties, and also due to the possibility of replacing the costly and heavy elements made from the traditionally used materials.

>Manufacturing of aluminium matrix composite materials reinforced by Al2O3 particles

>Advantages Of Aluminium Matrix composites

>Production of metal matrix composites

>Salient features of Metal Matrix Composites

>Application of Metal Composites

Click Here To Download Seminar On Matrix Aluminium Metals

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Seminar On Fusion Propulsion Engine

2013-09-02T14:50:00.001+05:30

Fusion Propulsion Engine Seminar Report

Fusion-based nuclear propulsion has the potential to enable fast interplanetary transportation. Due to the great distances between the planets of our solar system and the harmful radiation environment of interplanetary space, high specific impulse (Isp) propulsion in vehicles with high payload mass fractions must be developed to provide practical and safe vehicles for human spaceflight missions.reactions that occur in the core of the sun. The enormous energy created from those reactions is expelled from the engine to provide thrust. Using this type of propulsion system, a spacecraft could speed to Mars in just about three months. It would take conventional rockets at least seven months to reach Mars.Fusion reactions release an enormous amount of energy, which is why researchers are devising ways to harness that energy into a propulsion system. A fusion-powered spacecraft could move up NASA's schedule for a manned Mars mission. This type of spacecraft could cut travel time to Mars by more than 50 percent, thus reducing the harmful exposure to radiation and weightlessness.The building of a fusion-powered spacecraft would be the equivalent of developing a car on Earth that can travel twice as fast as any car, with a fuel efficiency of 7,000 miles per gallon. In rocket science, fuel efficiency of a rocket engine is measured by its specific impulse. Specific impulse refers to the units of thrust per the units of propellant consumed over time.

>Variable Specific Impulse Magnetoplasma Rocket

>Gas Dynamic Mirror Fusion Propulsion

>History of fusion for space propulsion

>Magnetic fusion fuels for space applications

>Fusion Reactor Designs for Space Applications

>VISTA ICF space-propulsion design

>FUSION PROPULSION Z-PINCH ENGINE

Click Here To Download Fusion Propulsion Engine Seminar Report and PPT

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Power Electronics and Power systems Seminar Topics

2013-08-30T20:06:00.001+05:30

Seminar Topics For Power System Engineering,Power Electronics Seminar Paper Presentation

High Speed Battery Charger For Electric Vehicles

Traction Transformer With Resonant Converter And MFT

Preventive Reactive Power Management Using Bender's Decomposition Algorithm

Sensor and Sensorless Control Methods for Direct Drive PMSG Wind Turbines

Temperature Estimation Techniques In Electric Motors and Reduce The Failures

Improvement Of Fault Ride Throuhg Capability Of DFIG Based Wind Turbines

DC Toleranace Electronic Current Sensor For Utility Power Metering

Wind Power Conversion And Grid Interconnection

Energy Management Control Strategy Of Dual Input CSI

HVDC PLUS- Modular Multilevel Converter

Three State Switching cell (3SSC) For PFC Applications

Hybrid WIND-PV System With MPPT Control

Next Generation Nuclear Power Plants

Demand Side Management Of Smart Grid Using An Intelligent Metering System

Bridgeless DCM SEPIC PFC Rectifiers With Low Conduction And Switching Losses

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Bridgeless DCM SEPIC PFC Rectifiers With Low Conduction And Switching Losses

2013-08-30T10:57:00.001+05:30

The AC-DC converters need to improve power quality in terms of power factor correction for reduced total harmonic distortion at input ac mains and precisely regulated dc output.This paper deals with a Single phase AC-DC Bridgeless Discontinuous Conduction Mode (DCM) with Single Ended Primary Inductance Converter (SEPIC) for Power Factor Correction (PFC) recti er . The topology is improved by the absence of an input diode bridge and the presence of only two semiconductor switches in the current growing path during each switching cycle which results in lesser conduction losses and improved thermal management compared to the conventional SEPIC converters. By implementing the improved topology in DCM it ensures almost unity power factor in a simple and e ective manner. The DCM operation gives additional advantages such as zero-current turn-on in the power switches, zero-current turn-o in the output diode and reduces the complexity of the control circuitry.Performance comparisons between the proposed and conventional Sepic PFC recti ers are performed.

>Power Factor Correction (PFC)

>Types of Power Factor Correction (PFC)

>Passive Power Factor Correction

>Active Power Factor Correction

>Sepic Converter

>SEPIC converter for PFC

Click Here To Download DCM PFC Rectifiers Seminar Report

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Six Stroke Diesel Engine Seminar Report

2013-08-30T10:31:00.001+05:30

Six Stroke Engine Seminar Report

The quest for an engine which having the same or more power with higher fuel efficiency than the existing ones has started before many years. As a result of all these researches a new engine concept is formed, which is a six stroke engine. Lot of research works are conducting on this topic nowadays and already six types of six stroke engines were discovered yet. Of these the resent developed three six stroke engines, i.e., Beare head, Bruce crowers and Velozeta’s are undergoing tremendous research works.

During every cycle in a typical four stroke engine, piston moves up and down twice in the chamber, resulting in four total strokes and one of which is the power stroke that provides the torque to move the vehicle. But in a six stroke engine there are six strokes and out of these there are two power strokes. The automotive industry may soon be revolutionized by a new six-stroke design which adds a second power stroke, resulting in much more efficiency with less amount of pollution.In six stroke engine, there are additional two strokes, namely another power and exhaust strokes. The engine works through harnessing wasted heat energy created by the fuel combustion. After the combustion stage water is injected into the super heated cylinder. The water explodes into steam and force the piston down. It in turn helps to cool the engine. That resulted in normal levels of power but using much less fuel. It also has the advantage of not requiring an external cooling system. In order to achieve these benefits, major modifications of conventional internal combustion engine must be done. In this paper the modification of the conventional four stoke internal combustion engine is illustrated to convert it into six stroke engine.

>History of six stroke engines

>Velozeta’s six stroke engine

>Griffin six stroke engine

>Bajulaz six stroke engine

>Crower six stroke engine

>Modifications for Six stroke engine

>Capacity and out put of six stroke engine

>Application of Six stroke engine

Click Here To Download Six Stroke Engine Seminar Report And PPT

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Demand Side Management Of Smart Grid Using An Intelligent Metering System

2013-08-29T23:26:00.001+05:30

Intelligent Power Metering System Seminar Report

Conventional power system has been experiencing transition from centralized supply side management to decentralized supply & demand side management due to power system restructuring and addition of distributed generations (DGs) and Smart Grids (SGs) or Smart Distribution Systems (SDSs) with renewable power sources which resulted in difficulties in load management. Therefore demand side load management has turned out to be the biggest concern of modernized power systems. An Intelligent Metering/Trading/Billing System(ITMBS) when implemented in Demand Side Load Management (DSLM) of SGs and SDSs provides real time price information to customers through communication networks. Through this metering system customers adjust their demands through setting the operating time of some of the home appliances with energy storage feature such as heaters based on the real time prices to shift their consumptions and save cost. Customers are also allowed to participate in Direct Load Control (DLC) program to shift their air condition demands through changing on and o circle based on the real time prices and weather conditions to save energy and to shift system peak load.

>Smart Grid System

>Demand Side Management

>Direct load management

>Indirect load management

>Methods used in Demand Side Management

>Grid metering and DSM network operation

>Smart Meters

>Energy transmission in smart grid

Click Here To Download Seminar On Demand Side Management

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A Single Phase DG Unit With Shunt APF Capability By Adaptive Neural Filtering

2013-08-29T21:48:00.000+05:30

The energy demands are increasing day by day and the associated costs also increasing with demand. Newer energy alternatives such as distributed generation (DG) has become an attractive method for providing electricity to consumers. But,increased use of power electronics devices in distribution systems causes problems related to power quality such as harmonics. In this situation,a single-phase distributed generation (DG) system with active power ltering (APF) capability, helps a lot in utility current harmonic compensation. With the proposed approach, control of DG unit is performed by injecting current into the grid with same phase and frequency of the grid voltage and with an amplitude depending on the power available from renewable sources. On the other hand, load harmonic current compensation is performed by injecting alternating current into the system with an opposite phase. Both, detection of the grid voltage fundamental and computation of the load harmonic compensation current have been performed by two neural adaptive lters with the same structure - notch and band con gurations. The notch lter has been used to compute the compensation current by eliminating only the contribution of fundamental load current, whereas the band con guration is able to extract the fundamental of the coupling point voltage. Furthermore, current control of components at di erent frequencies,is done with the help of a multi resonant current controller.

Click Here To Download Adaptive Neural Filtering Seminar Report

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Seminar On Next Generation Nuclear Power Plants

2013-08-28T15:35:00.001+05:30

Next Generation Nuclear Power Plants Seminar Report

Over the next 50 years, unless patterns change dramatically, energy production and use will contribute to global warming through large scale greenhouse gas emissions hundreds of billions of tonnes of carbon in the form of carbon dioxide. Nuclear power could be one option for reducing carbon emissions. At present, however, this is unlikely: nuclear power faces stagnation and decline.This study analyzes what would be required to retain nuclear power as a significant option for reducing greenhouse gas emissions and meeting

growing needs for electricity supply. Our analysis is guided by a global growth scenario that would expand current worldwide nuclear generating capacity almost threefold, to 1000 billion watts, by the year 2050. Such a deployment would avoid 1.8 billion tonnes of carbon emissions annually from coal plants, about 25% of the increment in carbon emissions otherwise expected in a business-as-usual scenario. This study also recommends changes in government policy and industrial practice needed in the relatively near term to retain an option for such an outcome.

>Nuclear Reactor Generations:A brief history

>Light Water Reactors

>High Temperature Reactors

>Fast Neutron Reactors

>The Generation IV International Forum (GIF)

>The IAEA program (INPRO)

>Advanced Nuclear Reactors

>Advances In Nuclear Power Generation

>New Generation Nuclear Power System

>Advanced Nuclear Waste Management System

Click Here To Download Future Nuclear Power Plant Seminar Report

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Hybrid WIND-PV System With MPPT Control

2013-08-25T17:54:00.000+05:30

Hybrid Wind PV System Seminar Report

The renewable energy sources forms a signi cant portion of the total energy production.Wind power and photovoltaic power are two clean and promising energy sources which are abundant in nature. A hybrid generation system consisting of wind and photovoltaic power can provide continuous output from day to night because these two sources can complement each other. Such a system can become a solution to the power supply problems in remote and isolated areas where a connection to the main grid is economically infeasible.The proposed system is a stand-alone o -grid hybrid wind PV system designed for application to remote and isolated areas. The wind power branch consists of a doubly excited permanent magnet brushless (PMBL) machine whose ux control allows maximum wind power extraction. The PV branch is equipped with a SEPIC converter and its duty cycle control in maximum power point tracking (MPPT). The MPPT technique used here is the Perturbation and Observation algorithm.

Generator Topologies for Wind Energy Systems

>DFIG system

>EESG

>Doubly Excited PMBL machine

>MPPT Techniques for Wind Energy Systems

>Tip Speed Ratio Control

>Power Signal Feedback Control

>Perturbation and Observation Control

>MPPT Techniques for PV System

>Constant Voltage Method

>Short-Current Pulse Method

>Perturb and Observe Methods

>Incremental Conductance (IC)

THE HYBRID WIND-PV SYSTEM

>MPPT System Confi guration

>Wind power branch

>PV power branch

>The Wind Power Generation Branch

>The Doubly Excited PMBL Machine

>Flux control in PMBL Machine

>MPPT Using P&O Method

>The PV Power Generation Branch

>SEPIC Converter

>MPPT of PV branch

>Hybrid Wind Power control system

Click Here To Download MPPT Control System Seminar Report

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HVDC PLUS- Modular Multilevel Converter Seminar Report

2013-08-24T21:24:00.000+05:30

HVDC Seminar Report

The seminar presents an actual view into the development of High Voltage Direct Current (HVDC) PLUS converter stations build in Modular Multilevel Converter (MMC) topology. This modern type of self-commutated converters has been developed under brand name HVDC PLUS by Siemens for use in electric power systems. VSC converters for HVDC applications have been based on two or three-level converter topologies consists of high number of semiconductor devices with blocking capability of a few kilovolts are connected in series up to several hundred per converter arm, depending on the DC voltage. To ensure uniform voltage distribution not only statically but also dynamically, all devices connected in series in one converter arm have to switch simultaneously. High and steep voltage steps are applied at the AC converter terminals which cause high component stresses and require extensive ltering measures. The MMC consists of a large number of simple voltage sourced converter (VSC) sub modules that can be easily assembled into a converter for high-voltage and high power. The MMC converter has a fast response and low harmonic content in comparison with a two-level VSC option. By using Modular Multilevel Converter (MMC) both the size of voltage steps and the related voltage gradients can be reduced or minimized.The more steps that are used, the smaller is the proportion of harmonics and the lower is the high-frequency noise. In the case of DC transmission, HVDC PLUS with VSCs is the preferred technology for interconnection of islanded grids, such as o shore wind farms, with the power system.

>Classical HVDC system

>HVDC Light(ABB)

>HVDC PLUS(Siemens)

>Schematic representation of HVDC PLUS

>Modular multilevel converter

>Simulation Of HVDC System

Click Here To Download PVDC Plus Converter Seminar report

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Energy Management Control Strategy Of Dual Input CSI

2013-08-24T15:15:00.000+05:30

Dual Input CSI Energy Management Seminar Report

The seminar presents a dual transformer less single stage inverter fed by a PV array and also by a proton exchange membrane fuel cell (PEMFC).Alternative energy sources have great interest in the area of static converter development.This fact is related in greater part to issues such as sustainability and detrimental e ects on the natural environment, which all contribute to the viability of this type of energy source.The strong dependence of PV systems on weather conditions brings the necessity of parallel connection of other energy sources in order to make the system autonomous and reliable.In this context,power electronics performs important tasks making viable the connection of all these kind of clean power sources to the conventional grid and also to the load.This seminar intends to contribute to the development of energy management systems capable of providing intelligent planning and control of appliances in low and high-power applications.The main feature of this inverter structure is the intelligent power management technique which focuses on the extraction of maximum power from the PV array keeping the PEMFC as an energy storage system.The increasing concern about the available fossil fuel reserves and the environmental aspects has given a high impetus to the use of renewable energy sources in the present scenario of power generation. The conventional energy sources, obtained from our environment, tend to exhaust with relative rapidity due to its irrational utilization by the humanity. This uncontrolled extraction of the natural energies, certainly will lead the

harmony of our ecological system to the instability.

Single Stage Grid Connected Inverter
Voltage waveforms
Single Stage Inverter
Imposition on the ILV current shape
Boost stage of current in positive half cycle of output voltage
Operation step with Cycle+ and V-[
Operation step with Cycle+ and V+
Dual input Single stage Current Source Inverter
Simpli ed Control diagram of the proposed dual transformer less single stage inverter
Output voltage control by means of current IL1 imposition
PV voltage control by means of current IL2 imposition
Output current and voltage, input inductor current, and FC voltage supplying 50%of rated load in the steady state

Click Here To Download Dual Input CSI Seminar Report

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Seminar On Wind Power Conversion And Grid Interconnection

2013-08-24T14:47:00.000+05:30

Due to the intermittent nature of renewable energy sources, power flow patterns in future grids will experience uctuation more often. This causes challenges in system operation to manage congestion in a high-speed fashion. The objective is to convert wind energy and interconnect it with national grid.Such capability is most desired in future grids with high penetration of renewable energy sources (e.g., wind and solar). The technology presented here uses the traditional LCC-HVDC recti er. This technology enables the HVDC recti er ac bus to act as an in nite bus and absorb fluctuating wind power. The study system consists of an ac system, an LCC-HVDC, and a doubly fed induction generator based wind farm. Parameters of the proposed control are investigated to show their impact on HVDC power routing and ac fault recovery.

Wind is a clean safe renewable form of energy. Unlike the trend towards large scale grid connected wind turbines, the more immediate demand for rural energy supply in developing countries is for smaller machines in the 5 - 100 kW range.These can be connected to small, localised micro-grid systems and used in conjunction with diesel generating sets or solar photovoltaic systems.

Seminar Report Consists of

HIGH VOLTAGE DIRECT CURRENT TRANSMISSION

>Advantages of Wind Power Generation

>HVDC Technology

>Comparison of LCC and VSC

>Converter Transformer

WIND POWER INTERCONNECTED SYSTEM

>Induction Generator Used In Wind Turbines

>Fixed Speed Turbines

>Variable Speed Wind Turbine

>Wide Speed Range Wind Turbine

>Filters Used In The System

>Rotor Side Converter AND Grid Side Converter

>Recti er and Inverter

>Case Study

>Response to a step change in voltage

Click Here To DownloadWind Power Conversion Seminar Report

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DC Toleranace Electronic Current Sensor For Utility Power Metering

2013-08-23T22:44:00.000+05:30

Power Metering System Seminar Report

Current sensor is a device which detects the current produce a signal proportional to it. The current sensor in current transformer is made of low permeability material for dc tolerance result in an unacceptably high magnetizing current and consequent gain and phase errors at all except very high frequencies.A su ciently high dc current in the primary winding may therefore saturate the core material since no cancelling magnetomotive force (mmf) can be supplied by the secondary winding. The transformer consists a uxchange sense winding and feedforward of the voltage developed across the secondary winding and burden resistances.

The increasing size and complexity of modern power systems have added more demands on the level required for the control, monitoring and protection of the system. Multi-function electronic meters are also replacing electromechanical induction types for high-accuracy, high voltage metering of bulk electrical energy.

These electronic meters and relays are very accurate, very sensitive and fast in their response. For intelligent metering and load management accurate voltage and current measurement is important. In the development of a current sensor for intelligent metering and load management should have following characteristics to be met:

1. High accuracy over wide dynamic range

2. Low cost

3. Reliability

4. Low power consumption

5. Low drift in output signal with time and temperature

6. High dc tolerance

7. Low sensitivity to currents in adjacent conductors

The high delity current sensors are used for utility power metering. The sensor are used on current transformers with low permeability core material for high dc tolerance. The transformer is having a ux-change sense winding and feed forward of the voltage developed across the secondary winding and burden resistances, minimizes the error when dc current superimposed onto the current under measurement.

Seminar Report Consists of

>Rogowski coil

>Closed loop variant hall e ect sensor

>Equivalent circuit of current transformer

>Op-amp circuitry across CT secondary terminal

>Compensating voltage in series with the CT secondary winding

>Ampli ed voltage applied in series to secondary winding

>Block diagram for the circuit

>Combined Feed forward of Voltage across Secondary Series Resistance and Feedback from the Flux-Change Sense Winding

>Schematic diagram of experimental circuit showing main components

Click Here To Download Power Metering Seminar Report

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Improvement Of Fault Ride Throuhg Capability Of DFIG Based Wind Turbines

2013-08-23T15:37:00.001+05:30

With increased penetration of wind energy as a renewable energy source, there is a need to keep wind turbines connected to the grid during di erent disturbances such as grid faults.Grid connected wind turbine doubly fed induction generators (DFIGs) are sensitive to dips in supply voltage,so-called "grid faults".Fault ride through systems must be designed to manage large and potentially dangerous fault currents in both stator and rotor circuits.This enables wind farms(WFs) to endure grid voltage dips avoiding WF-grid disconnection.A novel adaptive strategy can be used to obtain technically justi ed fault ride through requirements for wind turbines(WTs).The main objective of this strategy is to promote an e ective integration of WTs into power systems with still low penetration levels of wind power based on technical and economic considerations.The level of requirement imposed by the strategy is increased stepwise over time, depending on system characteristics and on wind power penetration level.The idea behind this strategy is to introduce stringent requirements only when they are technically needed for a reliable and secure power system operation.The use of superconducting fault current limiter(SFCL) improves the FRT capability of the system.Inferences ensure that SFCL is ef ective in decreasing the fault current.Moreover, both the voltage dip at the generator terminals and the reactive power consumption from the grid are decreased during fault.The voltage dip characteristics are discussed in accordance with the international grid codes for wind turbines.

Wind Generator Topologies

>Fixed Speed Induction Generator (FSIG)

>Doubly Fed Induction Generator (DFIG)

FAULT RIDE THROUGH CAPABILITY

>Introduction

>Adaptive Strategy

>Requirement Levels

>Methodology

>WT-Technologies

IMPROVEMENT OF FRT USING SFCL

>SFCL Model

>Simulation Results

>Stator Current Behavior

>Rotor Current Behavior

>Basic con guration of an FSIG wind turbine

>Basic con guration of a DFIG wind turbine

>FRT requirement for WTs according to the AS-FRT

>General diagram to obtain the AS-FRT

>Schematic diagram of DFIG-based wind turbine with SFCL

>Superconductor E - J characteristic, showing three states

>Stator current behavior with and without SFCL

>Change of rotor current under fault with and without SFCL

>Voltage-dip characteristics at the generator terminals

>Active and reactive power responses

>Reactive power response

>E ect of SFCL resistance on stator currents

>E ect of SFCL resistance on voltage dip at the generator terminal

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Temperature Estimation Techniques In Electric Motors and Reduce The Failures

2013-08-22T22:50:00.000+05:30

Temperature Estimation Techniques In Motor Windings Seminar Report

The organic materials used for stator winding insulation are subject to deterioration from thermal, electrical, and mechanical stresses. Stator winding insulation breakdown due to excessive thermal stress is one of the major causes of electric machine failures; therefore, prevention of such a failure is crucial for increasing machine reliability and minimizing nancial loss due to motor failure. Two major types of temperature estimation techniques, thermal model-based and parameter-based temperature techniques, reveals that neither method can protect motors without sacri cing the estimation accuracy or motor performance.Based on the evaluation of the advantages and disadvantages of these two types of temperature estimation techniques, a new on-line stator winding temperature estimation scheme for small to medium size mainsfed induction machines is proposed .The new stator winding temperature estimation scheme is based on a hybrid thermal model.By correlating the rotor temperature with the stator temperature, the hybrid thermal model uni es the thermal model-based and the parameter-based temperature estimation techniques.

Three-phase induction machines are used extensively in modern industry due to their cost e ectiveness, ruggedness and low maintenance requirements. A single industrial facility may have thousands of induction motors operating along its assembly lines. As a result of this coordinated operation, malfunction of an induction motor cause nancial losses not only associated with the individual repair or replacement, but also losses associated with the down time of the entire assembly line and the loss of productivity. For this reason, reliable motor operation is crucial in many industrial processes.According to IEEE Industry Applications Society (IAS) and Electric Power Research Institute (EPRI) surveys, most of the motor failures are related to the stator winding insulation and iron core[1]-[3]. These failures are primarily caused by severe operating conditions, such as cyclic overload operation or harsh operating environments,such as those in the mining or petrochemical industries.Although induction motors are rugged and reliable, the stator winding insulation failure is potentially destructive.It often leads to stator winding burnout and even total motor failure.

Direct Temperature measurement

>Temperature estimation based on thermal model

>Dual-element Time-delay Fuses

>Thermal Models with a Single Time Constant

>Temperature Estimation Based on Motor Parameters

>Resistance Estimation Using DC Injection

HYBRID THERMAL MODEL

>Full Order Hybrid Thermal Model

>Analysis Of Full Order Hybrid Thermal Model

>Analysis of the Full Order HTM Thermal Parameters

>Reduced Order Hybrid Thermal Model

INDUCTION MACHINE ON-LINE PARAMETER ESTIMATION

>On-line Calculation of Rotor Temperature

>On-line Inductance Estimation

>Rotor Temperature Calculation

>On-line Parameter Tuning

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Key:Thermal model, Parameter based temperature estimation,Hybrid model,Temperature generation in motor windings,Motor winding temperature control system,control system for motor windings,failure test for motor windings,thermal models for induction motors,power system seminar reports and ppt.

High Speed Battery Charger For Electric Vehicles

2013-08-22T17:18:00.001+05:30

High Speed Battery Charging Seminar Report

Internal combustion engine vehicles (ICE) are the widely used type of locomotion around the world.They however possess a major disadvantage that they cause pollution and the available oil reserves are depleting fast. This has led to the reintroduction of Electric vehicles (EV) in the 19th century.One of the major disadvantage of EV are they have a high charging time. This makes the electric vehicles incompetent with ICE vehicles. This paper proposes a method for faster charging of electric vehicles using CUK topology based DC-DC converter. It o ers many advantages over other topologies .They are capable of handling high power, provides high system e ciency due to low component count, maintains power factor almost unity, has fast response suitable for implementing fast charging, inherent inrush current limitation and reduced electromagnetic interference. However their major problem is that as the power output increases the size of the output capacitor increases,making the charger bulkier and improper for everyday use. But the proposed system is found to be better than the previous versions in terms of e fciency, size, weight and charging time. Further improvements in this regard can popularize the electric vehicles and bring about improved and pollution free environment.

Conventional vehicles are driven by internal combustion engine (ICE).They have gained widespread popularity from the time of their introduction. However the popularity of these vehicles has made their number very huge that available oil reserves are depleting rapidly and environmental pollution is increasing. This has forced to nd an alternative to ICE vehicles in the recent times, which has paved the way to Electric Vehicle (EV).Electric vehicles were introduced in the 18th century. However at that time due to the limitations associated with the batteries and better development of internal combustion engines electric vehicles vanished from the scene. Now they have gained popularity again and many research activities are

done worldwide. The major factors which still make them incompetent are high cost of batteries,greater charging time, and lesser distance of run in a single charge. The cost and storage capacity can be improved by improved battery types. However to make them competent with conventional ICE vehicles fast and improved charging methods are needed. In this report a faster charging algorithm,called Pulse charging has been proposed. The algorithm is implemented by using a bridgeless DC-DC converter based on Cuk topology The on-board battery charger based on Cuk DC-DC converter is capable of handling high power,

provides high system e ciency due to low component count, maintains power factor almost unity and has fast response suitable for implementing fast charging, when compared to other topologies like Buck, Boost, and Buck-Boost. It also has low weight, compactness, inherent inrush current limitation and reduced electromagnetic interference suitable for on-board battery chargers.

OVERVIEW OF DC-DC CONVERTERS

>Buck converter

>Boost converter

>Buck-Boost converter

>CUK converter

>DC-DC Converter in Electric vehicles

BATTERY TYPES AND CHARGING TECHNIQUES

>Battery parameters

>Battery Charging Techniques

>PROPOSED CUK CONVERTER 9

>Circuit diagram

>Principle Of The Proposed Charger And Theoretical Analysis

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Sensor and Sensorless Control Methods for Direct Drive PMSG Wind Turbines

2013-08-22T12:29:00.002+05:30

Wind Turbine Control System Seminar Report

Wind turbine generators (WTGs) are usually equipped with mechanical sensors to measure wind speed and rotor position for system control, monitoring, and protection.The use of mechanical sensors increases the cost and hardware complexity and reduces the reliability of the WTG systems.This paper focuses on the use of direct drive PMSG in wind power generation.This paper also makes a comparative study on mechanical sensored and sensorless maximum power tracking control for wind turbines directly driving permanent magnetic synchronous generators (PMSGs).

In recent years there has been an increasing awareness about the climate change (global warming) and the harmful e ects that the emissions of CO2 have. This created a higher demand for clean and sustainable energy sources like: wind, sea, sun, biomass etc. The wind energy has experienced the biggest growth in the past 10 years.This is because wind energy is a pollution-free resource,which has an inexhaustible potential and also because of its increasingly competitive cost.The generation capacity increased from 26000MW in 2001 to 507000 MW in 2010.It can operate in conjunction with grid or in isolation, based on this they can be classi ed as grid connected or standalone systems.The another factor concerned with wind power generation is that the control strategies employed.Control, monitoring, and protection of WTGs usually requires the information of wind speed and generator rotor position. These can be measured by well calibrated mechanical sensors, such as anemometers and rotor position sensors or by a sensorless control.The problems incurred in using mechanical sensors can be solved through mechanical sensorless control.

>Doide recti er based PMSG

>WECS- controlled system with anemometer

>MARS control

>Neural network structure

>Block diagram of sliding mode observer

>Con guration of a Direct-Drive PMSG Wind Turbine System

>BPANN-based optimal shaft speed reference determination

>Block diagram of the sliding mode observer

>Sensorless control for the PMSG wind turbine

Click Here To Download Wind Turbine Control System Seminar Report

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Preventive Reactive Power Management Using Bender's Decomposition Algorithm

2013-08-22T12:12:00.001+05:30

Voltage stability imposes limitations on the system operation and therefore maintaining adequate reactive power generation and reserve is considered important for maintaining voltage stability. There are mainly two methods of maintaining voltage stability preventive and corrective control actions. This seminar focuses on the preventive actions for maintaining voltage stability and it is considered from the generator point of view as it is the major source of reactive power. The management of the reactive power generation and reactive power reserve (RPR), of a generator are the main preventive actions against voltage instability. For taking the preventive action an algorithm called Benders Algorithm is used which determine the RPR, which is necessary for maintaining voltage stability in the event of an oncoming contingency. This algorithm has two steps master problem and sub problem. The Master problem determines the minimum overall needed RPR of generators such that the system withstands any outage scenario.The Sub problem determines, additional RPR to ensure voltage stability whenever the obtained RPRs by rst step are insu cient to confront with dynamic system behavior. Thus this method predicts the reactive power reserve to be kept for maintaining adequate voltage stability. This preventive method can help minimize the Post fault corrective e orts for voltage stabilization and help improve the overall system stability.

Click Here To Download Power management Seminar Report

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Traction Transformer With Resonant Converter And MFT

2013-08-19T15:44:00.003+05:30

Traction Transformer Seminar Report

This contribution deals with a new con guration of traction transformer with multilevel converter topology and DC-DC resonant converter for locomotives.This marks an important milestone in traction world.Here,the paper also points a comparative study with conventional transformer topology.Two innovative conversion systems have been studied, which permit the use of transformers of greatly reduced size.An overall design requirements and control system for PETT prototype is developed and describes the design of a 1.2 MW Power Electronic Traction Transformer (PETT) demonstrator in traction applications for 15 kV / 16.7 Hz and 25 kV / 50 Hz grid supply.

One especially challenging application area for transformers is traction. The more space the transformer occupies, the less is available for passengers on the train. Its weight is also a factor in terms of permissible train axle load and additional energy needed to accelerate it. Factors determining the minimum size of a transformer include the frequency and the power rating. A higher frequency transformer would permit weight savings as well as space savings. This is the motivation behind power-electronic traction transformer (PETT).Ultimate target is to reduce the weight and size of the transformer thus increase in reliability and e ciency.In conventional railway systems,the supply of the traction chain and auxiliaries is realized by a Line frequency transformer and converter modules connected to the catenary,this leads to consuming more space,weight and reducing the e ciency and reliability.So the LFT is replaced by MFT,where the high frequency waveforms are dierectly to the transformer terminals so that the overall magnetic volume is reduced and more compact converter designs are reached.In addition to this ,multilevel converter topology and DC-DC resonant converter techniqes have to be reduces the switching losses,to gain wide output voltage regulation and increases the switching frequency.Thus here introducing this paper Power Electronic Traction Transformer(PETT).This paper,describes about the constructional features and control system of PETT,(which is presently in use by the Swiss Federal Railways),and a comparative study with conventional system.

>Working of Traction Transformer

>Application of Traction Transformer in Power industry

>Proposed Power Electronics Traction Transformer (PETT)

>Cascaded Converters

>Short circuiting and Line ltering elements

>Medium Frequency Transformers (MFT)

>DC-DC Resonant Converter

>Topology Of Conventional Traction Transformer System

>Advantages of Traction Transformer System

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Polarography:Working and Application

2013-08-10T18:49:00.002+05:30

Polarography Seminar Report

Polarography is the study of the electrolysis of solutions of electrooxidizable and electroreducible substances between a dropping mercury electrode (DME) and some reference electrode (RE) . The potential between these electrodes is varied and the consequent changes in the flow of current is measured.On plotting the changes in current flow versus the potential variation, one obtains an i - E curve known as polarogram. The first scientist who discovered the use of the DME in electrolysis is Jaroslave Heyrovsky in 1922 and received the Nobel Prize in Chemistry in 1959.

>Working Principles of Polarography

>History and Invention of Polarography

>Application of Polarography in Engineering

>Polarography technique

>Other Voltametric analysis Systems

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