TECHNIQUES FOR ONLINE DETECTION OF SHORTS IN TURBINE GENERATOR ROTOR

CAUSES FOR SHORTED TURNS
COIL FORESHORTENING
END-STRAP ELONGATION
FOREIGN MATERIAL CONTAMINATION
BLOCKING PROBLEMS

1.COIL FORESHORTENING
BODY CU CANT EXPAND FREELY
MINIMISE BY USING MATERIALS WITH
SUFFICIENT YIELD STRENGTHS

WHY DETECTION IS IMPORTANT
ROTOR UNBALANCE
VIBRATION
HIGHER FIELD CURRENT IS REQUIRED
HIGHER TEMPERATURE WILL RESULT
DIMINISHED CAPACITY

COMPARISON[/ ....etc

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ABSTRACT
The overall goal of the work presented in this thesis is to extend the physical understanding of the external aerodynamics associated with the rotating case of Hovering Rotor using Computational Fluid Dynamics (CFD) technique.
Rotating blades encounter tip vortices coming from preceding blades, which results in Blade Vortex Interaction(BVI) responsible for producing dynamic effects. Understanding the complex flow field due to this dynamic effects produced by wakes is therefore very important for the prediction of effects such as blad ....etc

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Numerical simulation of rotor stator interaction is crucial for turbo machinery improvement since it allows the optimization of blade path design In addition the numerical simulation of rotor stator interaction makes it possible to predict the location and variation of hot spots on blades which is extremely useful in the turbine thermal design However simulation of rotor stator interaction is notorious for being computationally expensive To reduce the turnaround time and cost MFLOP a parallel code based on the message passing interface l ....etc

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Hi am Mohamed i would like to get details on hts transformer ppt ..My friend Justin said hts transformer ppt will be available here and now i am living at ......... and i last studied in the college/school ......... and now am doing ....i need help on ......etc ....etc

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....etc

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Hi am Mohamed i would like to get details on hts transformer ppt ..My friend Justin said hts transformer ppt will be available here and now i am living at ......... and i last studied in the college/school ......... and now am doing ....i need help on ......etc

Introduction

In highly interconnected and expanded power system,

faults of increased magnitude start creeping frequently

into the system, so we have to look for a solution that

can help reduce these increased magnitudes of fault

currents.

Problems of Fault Control

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A technique for on-line detection of incipient faults in the windings of turbine - generator rotors has been developed based on the twin signal sensing method. To detect the developing shorts in any winding, two identical pulses are applied to both ends f the winding and are reflected back .Any abnormality in the winding results in the applied signals being reflected through nonsymmetrical circuits. The difference between the reflected signals are amplified and used as signature signal for further processing. This paper describes the developmen ....etc

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presented by:
ARTATRAN RATH


SUPER MACHINE USING HTS
INTRODUCTION
 The advances in High Temperature Superconductors (HTS) are enabling a new class of synchronous rotating machines (i.e Super Motors and Super Generators) which can generically be categorized as Super Machines.
 The field windings of the super machine are made with HTS conductor material which operates at 35-40 K and can be cooled with inexpensive.
HTS wire status…
o Generally the HTS wire matterial used in super machine a ....etc

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¢ HTS Fault Current Limiters
By: Leanne Naidoo & Pranesh Sarjoodei
¢ Introduction
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Fault Current ,Circuit Breakers
¢ Fault currents are unanticipated power disturbances in the utility grid caused by lightning etc
¢ This causes circuit breakers to open and close. Circuit breaker will remain open in wait for repair crew.
¢ Until the power is restored, an outage occurs.
¢ In today™s electricity dependant economy, significant hardships and economic losses o ....etc

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hi.....plz post more information regarding the above mentioned topic........

raviteja ....etc

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