ABSTRACT
Power transformers are key components for electrical energy transfer in a power system.
Stability and security of transformer protection are important to system operation. Many
maloperation cases of transformer differential protection are caused by inrush current
problems. The phenomenon of transformer inrush current has been widely discussed in
literature. Therefore, this research only discussed and analyzed inrush current problems
to transformer differential protection.
To understand the inrush current problems on differential protection, transformer
simulation models were presented using Matlab/Simulink. Differential relay simulations
for internal and external faults, and relay performance during current transformer
saturation were performed using PSCAD.
Recommendations were made on methods of reducing the blocking time of differential
protection during inrush conditions.
| Identifer | oai:union.ndltd.org:netd.ac.za/oai:union.ndltd.org:wits/oai:wiredspace.wits.ac.za:10539/4773 |
| Date | 21 April 2008 |
| Creators | Madzikanda, Ezekiel |
| Source Sets | South African National ETD Portal |
| Language | English |
| Detected Language | English |
| Type | Thesis |
| Format | 2830336 bytes, 23656 bytes, 20480 bytes, application/msword, application/pdf, application/msword, application/msword, application/pdf, application/msword |
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