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Flux Linkages Ratio-Based Transformer Protection  

강용철 (전북대 전자정보공학부)
이병은 (전북대 전기공학과)
김은숙 (전북대 전기공학과)
원성호 (전북대 전기공학과)
Publication Information
The Transactions of the Korean Institute of Electrical Engineers A / v.52, no.11, 2003 , pp. 655-660 More about this Journal
Abstract
This paper describes a transformer protective relaying algorithm based on the ratio of increments of flux linkages (RIFL) of the primary and secondary windings. The algorithm uses integration approximation. The RIFL is equal to the turns ratio for all operating conditions except for an internal fault. For a single-phase transformer and a Y-Y transformer, the increments of flux linkages (IFL) are calculated. For a Y-$\Delta$ transformer, the difference of IFL are calculated to use the line currents rather than the delta winding currents, which are unavailable. Their ratios are compared with the turns ratio. The comparative study between the proposed and conventional differentiation approximation methods was conducted. The test results show that the algorithm reduces the approximation errors of the conventional methods.
Keywords
Ratio of the increments o flux linkages; Magnetic inrush; Over-excitation; Numerical errors;
Citations & Related Records
Times Cited By KSCI : 4  (Citation Analysis)
연도 인용수 순위
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