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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Oliveira, M.O. Salim, R.H. Bretas, A.S. |
| Copyright Year | 2008 |
| Description | Author affiliation: Fed. Univ. of Rio Grande do Sul, Porto Alegre (Oliveira, M.O.; Salim, R.H.; Bretas, A.S.) |
| Abstract | This paper proposes a novel formulation for differential protection of three-phase transformers using Wavelet Transforms (WTs). The new proposed methodology implements the WTs to extract predominant transient signals originated by transformer internal faults and captured from the current transformers. The Wavelet Transform is an efficient signal processing tool used to study non stationary signals with fast transition (high frequency components), mapping the signal in time-frequency representation. The three phase differential currents are the input signals used on-line to detect internal faults. The performance of this algorithm is demonstrated through simulation of different internal faults and switching conditions on a power transformer using ATP/EMTP software. The analyzed data is obtained from simulation of different normal and faulty operating conditions such as internal faults - phase/phase, phase/ground-, magnetizing inrush and external faults. The case study shows that the new algorithm is highly accurate and effective. |
| Starting Page | 1 |
| Ending Page | 6 |
| File Size | 13807418 |
| Page Count | 6 |
| File Format | |
| ISBN | 9781424422173 |
| DOI | 10.1109/TDC-LA.2008.4641818 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2008-08-13 |
| Publisher Place | Colombia |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Wavelet transforms power transformer Current transformers internal faults inrush current Differential protection wavelets transform Discrete wavelet transforms Circuit faults Power transformers Relays Power transformer insulation |
| Content Type | Text |
| Resource Type | Article |
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