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Fault direction estimation in radial distribution system using phase change in sequence current
- Source :
- IEEE Transactions on Power Delivery. Oct, 2007, Vol. 22 Issue 4, p2065, 7 p.
- Publication Year :
- 2007
-
Abstract
- When a remotely sited wind farm is connected to the utility power system through a distribution line, the overcurrent relay at the common coupling point needs a directional feature. This paper presents a method for estimating the direction of fault in such radial distribution systems using phase change in current. The difference in phase angle between the positive-sequence component of the current during fault and prefault conditions has been found to be a good indicator of the fault direction in a three-phase system. A rule base formed for the purpose decides the location of fault with respect to the relay in a distribution system. Such a strategy reduces the cost of the voltage sensor and/or connection for a protection scheme which is of relevance in emerging distributed-generation systems. The algorithm has been tested through simulation for different radial distribution systems. Index Terms--Digital relay, directional relay, distributed generation, feeder protection, overcurrent relay, phasor estimation.
Details
- Language :
- English
- ISSN :
- 08858977
- Volume :
- 22
- Issue :
- 4
- Database :
- Gale General OneFile
- Journal :
- IEEE Transactions on Power Delivery
- Publication Type :
- Academic Journal
- Accession number :
- edsgcl.169716042