On-line identification of magnetizing inrush and internal faults in three-phase transformers

The authors present a microprocessor-based system for online identification of magnetizing inrush and internal fault conditions in three-phase transformers. The system uses a digital algorithm which is based on a transformer model and can be used irrespective of whether or not it is possible to meas...

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Vydáno v:IEEE transactions on power delivery Ročník 7; číslo 4; s. 1885 - 1891
Hlavní autoři: SIDHU, T. S, SACHDEV, M. S
Médium: Konferenční příspěvek Journal Article
Jazyk:angličtina
Vydáno: New York, NY Institute of Electrical and Electronics Engineers 1992
Témata:
240100 - Power Systems- (1990-)
240300 - Power Transmission Lines & Cables- (1990-)
990200 - Mathematics & Computers
ALGORITHMS
Applied sciences
COMPUTERIZED CONTROL SYSTEMS
COMPUTERIZED SIMULATION
COMPUTERS
CONTROL SYSTEMS
DESIGN
DIGITAL SYSTEMS
Electrical engineering. Electrical power engineering
ELECTRICAL EQUIPMENT
ELECTRICAL FAULTS
ELECTRONIC CIRCUITS
Exact sciences and technology
GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE
MAGNETIC FIELDS
MATHEMATICAL LOGIC
MICROELECTRONIC CIRCUITS
MICROPROCESSORS
ON-LINE CONTROL SYSTEMS
ON-LINE MEASUREMENT SYSTEMS
ON-LINE SYSTEMS
OPERATION
PERFORMANCE TESTING
POWER SYSTEMS
POWER TRANSMISSION AND DISTRIBUTION
POWER TRANSMISSION LINES
RELAYS
RELIABILITY
SIMULATION
TESTING
TRANSFORMERS
Transformers and inductors
Magnetization
Modal analysis
Internal
Differential protection
Three phase transformer
Power transformer
Algorithm
Microprocessor
Detection
Protection
Digital relay
Monitoring control system
Electric fault
ISSN:0885-8977, 1937-4208
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Popis
Shrnutí:The authors present a microprocessor-based system for online identification of magnetizing inrush and internal fault conditions in three-phase transformers. The system uses a digital algorithm which is based on a transformer model and can be used irrespective of whether or not it is possible to measure winding currents. The only parameters needed by the algorithm are positive and negative sequence impedances of the transformer. These parameters are usually a part of the name-plate data. The proposed algorithm has been implemented on a Texas Instrument TMS320C25 digital signal processor. The hardware and software of the system are described. The ability of the system to identify magnetizing inrush and internal faults was tested by using a 15 kVA three-phase transformer. Some test results are reported.
Bibliografie:ObjectType-Article-2
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content type line 23
ISSN:0885-8977
1937-4208
DOI:10.1109/61.156991