Improved estimates from the differential equation algorithm by median post-filtering
(1997) IEEE 6th International Conference on Developments in Power System Protection p.235-238- Abstract
- Fast line relaying algorithms are motivated by the need to keep the fault clearing time as short as possible. Fast fault clearing reduces the risk for transient instability, thermal stress on equipment and risk for personnel injuries. There exists, at least, three different themes in transmission line protection: impedance algorithms differential equation algorithms (DEA); and travelling wave algorithms. This paper focuses on the differential equation algorithm. The paper presents the equations used in the differential equation algorithm. Both the continuous-time and the discrete-time equations are given. The very poor estimates are explained by the equations determinant. At some isolated points the determinant approaches zero and the... (More)
- Fast line relaying algorithms are motivated by the need to keep the fault clearing time as short as possible. Fast fault clearing reduces the risk for transient instability, thermal stress on equipment and risk for personnel injuries. There exists, at least, three different themes in transmission line protection: impedance algorithms differential equation algorithms (DEA); and travelling wave algorithms. This paper focuses on the differential equation algorithm. The paper presents the equations used in the differential equation algorithm. Both the continuous-time and the discrete-time equations are given. The very poor estimates are explained by the equations determinant. At some isolated points the determinant approaches zero and the equations become singular. This results in useless, often extreme, estimates. A simulation shows that a linear post-filter is unsuitable for this problem. To solve the problem we suggest a median post-filter. This filter type totally rejects the extreme values, and therefore produce fast and accurate estimates. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/4589045
- author
- Akke, Magnus LU and Thorps, J S
- organization
- publishing date
- 1997
- type
- Chapter in Book/Report/Conference proceeding
- publication status
- published
- subject
- keywords
- continuous-time equations determinant differential equation algorithm discrete-time equations estimates improvement fast line relaying algorithms median post-filtering personnel injuries risk reduction short fault clearing time thermal stress reduction transient instability risk reduction
- host publication
- Sixth International Conference on Developments in Power System Protection (Conf. Publ. No. 434)
- issue
- 434
- pages
- 235 - 238
- publisher
- IEEE - Institute of Electrical and Electronics Engineers Inc.
- conference name
- IEEE 6th International Conference on Developments in Power System Protection
- conference location
- London, United Kingdom
- conference dates
- 0001-01-02
- external identifiers
-
- scopus:0030654115
- ISSN
- 0537-9989
- ISBN
- 0-85296-672-5
- DOI
- 10.1049/cp:19970071
- language
- English
- LU publication?
- yes
- id
- 6d72daa5-9141-4175-a619-b64936715ab2 (old id 4589045)
- alternative location
- http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=608190
- date added to LUP
- 2016-04-01 16:39:32
- date last changed
- 2022-04-15 06:06:04
@inproceedings{6d72daa5-9141-4175-a619-b64936715ab2,
abstract = {{Fast line relaying algorithms are motivated by the need to keep the fault clearing time as short as possible. Fast fault clearing reduces the risk for transient instability, thermal stress on equipment and risk for personnel injuries. There exists, at least, three different themes in transmission line protection: impedance algorithms differential equation algorithms (DEA); and travelling wave algorithms. This paper focuses on the differential equation algorithm. The paper presents the equations used in the differential equation algorithm. Both the continuous-time and the discrete-time equations are given. The very poor estimates are explained by the equations determinant. At some isolated points the determinant approaches zero and the equations become singular. This results in useless, often extreme, estimates. A simulation shows that a linear post-filter is unsuitable for this problem. To solve the problem we suggest a median post-filter. This filter type totally rejects the extreme values, and therefore produce fast and accurate estimates.}},
author = {{Akke, Magnus and Thorps, J S}},
booktitle = {{Sixth International Conference on Developments in Power System Protection (Conf. Publ. No. 434)}},
isbn = {{0-85296-672-5}},
issn = {{0537-9989}},
keywords = {{continuous-time equations determinant differential equation algorithm discrete-time equations estimates improvement fast line relaying algorithms median post-filtering personnel injuries risk reduction short fault clearing time thermal stress reduction transient instability risk reduction}},
language = {{eng}},
number = {{434}},
pages = {{235--238}},
publisher = {{IEEE - Institute of Electrical and Electronics Engineers Inc.}},
title = {{Improved estimates from the differential equation algorithm by median post-filtering}},
url = {{http://dx.doi.org/10.1049/cp:19970071}},
doi = {{10.1049/cp:19970071}},
year = {{1997}},
}