Evaluation of Nordic Generator Technical Requirements Appendix 4 : A rotor dynamic analysis of Harsprånget and Midskog
At the moment many hydropower units, HPU, in Sweden are to be renovated and due to the typically long life of HPU the staff that designed and commissioned them are no longer available to consult. In order for the units to operate in a similar or improved matter after renovation as prior to it, Vatte...
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ftluleatu:oai:DiVA.org:ltu-42582 2023-05-15T16:33:46+02:00 Evaluation of Nordic Generator Technical Requirements Appendix 4 : A rotor dynamic analysis of Harsprånget and Midskog Nilsson, Erik 2014 application/pdf http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-42582 eng eng http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-42582 Local 092ed3d6-bd01-496d-8863-518f146d0cdd info:eu-repo/semantics/openAccess Technology Teknik Rotordynamik vattenkraft hydropower rotor dynamics harsprånget midskog Student thesis info:eu-repo/semantics/bachelorThesis text 2014 ftluleatu 2022-10-25T20:52:32Z At the moment many hydropower units, HPU, in Sweden are to be renovated and due to the typically long life of HPU the staff that designed and commissioned them are no longer available to consult. In order for the units to operate in a similar or improved matter after renovation as prior to it, Vattenfall and Statkraft has together complied a document called Nordic Generator Technical Requirements, NGTR, where appendix 4 states demands on the mechanical dimensioning of HPU that are to be seen as guidelines when renovating a HPU.The section on rotor dynamics is evaluated in this thesis as to check if these guidelines can be met with typical designs why two HPU, Harsprånget G2 and Midskog G2, are analyzed. The RAPPID v.3.20 software supplied by RSR is used throughout this thesis.A method for conducting a sensitivity analysis called the elementary effects method is applied and the results give information to novice designers of hydropower units as to what parameters have the strongest effect on the end results. The parameters that were tested during the sensitivity analysis were mainly bearing parameters that are typically changed during design but also the added mass from co-rotating water in runner. As the sensitivity analysis was run using a large number of simulations, all of these simulations were evaluated using the NGTR requirements to look for designs were these criteria were met. As none of these designs fulfilled the criteria an optimization scheme typical for renovations was setup to further improve the designs.Neither one of these optimized designs met the criteria why it is concluded that it is not possible to dimension these two HPU according to the guidelines in NGTR Appendix 4 without a more significant design change than what was done in this thesis. Validerat; 20140828 (global_studentproject_submitter) Bachelor Thesis Harsprånget Luleå University of Technology Publications (DiVA) Harsprånget ENVELOPE(19.819,19.819,66.886,66.886) |
institution |
Open Polar |
collection |
Luleå University of Technology Publications (DiVA) |
op_collection_id |
ftluleatu |
language |
English |
topic |
Technology Teknik Rotordynamik vattenkraft hydropower rotor dynamics harsprånget midskog |
spellingShingle |
Technology Teknik Rotordynamik vattenkraft hydropower rotor dynamics harsprånget midskog Nilsson, Erik Evaluation of Nordic Generator Technical Requirements Appendix 4 : A rotor dynamic analysis of Harsprånget and Midskog |
topic_facet |
Technology Teknik Rotordynamik vattenkraft hydropower rotor dynamics harsprånget midskog |
description |
At the moment many hydropower units, HPU, in Sweden are to be renovated and due to the typically long life of HPU the staff that designed and commissioned them are no longer available to consult. In order for the units to operate in a similar or improved matter after renovation as prior to it, Vattenfall and Statkraft has together complied a document called Nordic Generator Technical Requirements, NGTR, where appendix 4 states demands on the mechanical dimensioning of HPU that are to be seen as guidelines when renovating a HPU.The section on rotor dynamics is evaluated in this thesis as to check if these guidelines can be met with typical designs why two HPU, Harsprånget G2 and Midskog G2, are analyzed. The RAPPID v.3.20 software supplied by RSR is used throughout this thesis.A method for conducting a sensitivity analysis called the elementary effects method is applied and the results give information to novice designers of hydropower units as to what parameters have the strongest effect on the end results. The parameters that were tested during the sensitivity analysis were mainly bearing parameters that are typically changed during design but also the added mass from co-rotating water in runner. As the sensitivity analysis was run using a large number of simulations, all of these simulations were evaluated using the NGTR requirements to look for designs were these criteria were met. As none of these designs fulfilled the criteria an optimization scheme typical for renovations was setup to further improve the designs.Neither one of these optimized designs met the criteria why it is concluded that it is not possible to dimension these two HPU according to the guidelines in NGTR Appendix 4 without a more significant design change than what was done in this thesis. Validerat; 20140828 (global_studentproject_submitter) |
format |
Bachelor Thesis |
author |
Nilsson, Erik |
author_facet |
Nilsson, Erik |
author_sort |
Nilsson, Erik |
title |
Evaluation of Nordic Generator Technical Requirements Appendix 4 : A rotor dynamic analysis of Harsprånget and Midskog |
title_short |
Evaluation of Nordic Generator Technical Requirements Appendix 4 : A rotor dynamic analysis of Harsprånget and Midskog |
title_full |
Evaluation of Nordic Generator Technical Requirements Appendix 4 : A rotor dynamic analysis of Harsprånget and Midskog |
title_fullStr |
Evaluation of Nordic Generator Technical Requirements Appendix 4 : A rotor dynamic analysis of Harsprånget and Midskog |
title_full_unstemmed |
Evaluation of Nordic Generator Technical Requirements Appendix 4 : A rotor dynamic analysis of Harsprånget and Midskog |
title_sort |
evaluation of nordic generator technical requirements appendix 4 : a rotor dynamic analysis of harsprånget and midskog |
publishDate |
2014 |
url |
http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-42582 |
long_lat |
ENVELOPE(19.819,19.819,66.886,66.886) |
geographic |
Harsprånget |
geographic_facet |
Harsprånget |
genre |
Harsprånget |
genre_facet |
Harsprånget |
op_relation |
http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-42582 Local 092ed3d6-bd01-496d-8863-518f146d0cdd |
op_rights |
info:eu-repo/semantics/openAccess |
_version_ |
1766023457397538816 |