search query: @keyword Arrheniuksen yhtälö / total: 2
reference: 2 / 2
« previous | next »
Author:Gíslason, Jens Kristinn
Title:Lifetime Prediction for Hydro Generators
Vesivoimageneraattorin eliniän arviointi
Publication type:Master's thesis
Publication year:2005
Pages:60      Language:   eng
Department/School:Sähkö- ja tietoliikennetekniikan osasto
Main subject:Sähkömekaniikka   (S-17)
Supervisor:Arkkio, Antero
Instructor:Knútsson, Valur
OEVS:
Electronic archive copy is available via Aalto Thesis Database.
Instructions

Reading digital theses in the closed network of the Aalto University Harald Herlin Learning Centre

In the closed network of Learning Centre you can read digital and digitized theses not available in the open network.

The Learning Centre contact details and opening hours: https://learningcentre.aalto.fi/en/harald-herlin-learning-centre/

You can read theses on the Learning Centre customer computers, which are available on all floors.

Logging on to the customer computers

  • Aalto University staff members log on to the customer computer using the Aalto username and password.
  • Other customers log on using a shared username and password.

Opening a thesis

  • On the desktop of the customer computers, you will find an icon titled:

    Aalto Thesis Database

  • Click on the icon to search for and open the thesis you are looking for from Aaltodoc database. You can find the thesis file by clicking the link on the OEV or OEVS field.

Reading the thesis

  • You can either print the thesis or read it on the customer computer screen.
  • You cannot save the thesis file on a flash drive or email it.
  • You cannot copy text or images from the file.
  • You cannot edit the file.

Printing the thesis

  • You can print the thesis for your personal study or research use.
  • Aalto University students and staff members may print black-and-white prints on the PrintingPoint devices when using the computer with personal Aalto username and password. Color printing is possible using the printer u90203-psc3, which is located near the customer service. Color printing is subject to a charge to Aalto University students and staff members.
  • Other customers can use the printer u90203-psc3. All printing is subject to a charge to non-University members.
Location:P1 Ark S80     | Archive
Keywords:lifetime prediction
hydro generators
insulation aging
failure diagnosis
Arrhenius equation
eliniän arviointi
vesivoimageneraattori
eristys
ikääntyminen
vikadiagnostiikka
Arrheniuksen yhtälö
Abstract (eng):This thesis concerns lifetime prediction of hydro generators and how different operational and environmental factors affect the lifetime.
A method for predicting the remaining lifetime, using information on it's design, operational history and condition, is introduced and tested.

Determining the condition of the stator winding and core insulation systems is vital for any attempt to lifetime prediction for hydro generators.
Information on the condition can be obtained by visual inspection, diagnostic measurements and condition monitoring methods.

A method to predict the remaining lifetime of hydro generators considering the statements above is explained.
The method is used to predict the remaining lifetime for two generators in Steingrimsstöd hydro station in Iceland.
Only information from 1995 and older is used in the prediction.
In this way the predicted lifetime can be compared to the real experience of the generators.

The results show that the lifetime prediction for the test specimens does not match the reality accurately.
The method does however determine the insulation condition and diagnose the failure modes correctly.
The exact time of failure is not only governed by the machine condition but other unpredictable factors as well.
ED:2005-11-28
INSSI record number: 30032
+ add basket
« previous | next »
INSSI