The IRMA Community
Newsletters
Research IRM
Click a keyword to search titles using our InfoSci-OnDemand powered search:
|
Differential Protection Enhancement for Power Transformer
|
|
Author(s): Hamid Bentarzi (University M'hamed Bougara of Boumerdes, Algeria)and Rachid Bouderballa (Laboratory Signals and Systems, University M'hamed Bougara of Boumerdes, Algeria)
Copyright: 2021
Pages: 25
Source title:
Optimizing and Measuring Smart Grid Operation and Control
Source Author(s)/Editor(s): Abdelmadjid Recioui (Université M'hamed Bougara de Boumerdes, Algeria)and Hamid Bentarzi (Université M'hamed Bougara de Boumerdes, Algeria)
DOI: 10.4018/978-1-7998-4027-5.ch014
Purchase
|
Abstract
A power transformer is protected against internal faults using a differential protection which is sensitive and a fast. However, during transformer magnetization (inrush current or over-excitation), the differential relay may operate unnecessarily. This phenomenon appears only when a transformer is first energized or after clearing external fault. During periodic magnetization condition due to over-excitation, the third and fifth harmonic components are largely noticed; however, during the normal apperiodic inrush conditions, the second harmonic is relatively high. In the conventional techniques, these harmonic components have been used to block differential protection to operate. However, in smart power transformer, these harmonic components are small even during the transformer magnetization; they cannot be used as block protection functions. The differential protection security has to be improved so that it can distinguish between differential current produced by magnetization and that produced by internal fault using the most advanced computer with most improved DSP algorithms.
Related Content
|
.
© 2023.
17 pages.
|
|
.
© 2023.
13 pages.
|
|
.
© 2023.
18 pages.
|
|
.
© 2023.
20 pages.
|
|
.
© 2023.
26 pages.
|
|
.
© 2023.
14 pages.
|
|
.
© 2023.
20 pages.
|
|
|