대한전기학회:학술대회논문집 (Proceedings of the KIEE Conference)
- 대한전기학회 1992년도 하계학술대회 논문집 A
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- Pages.63-66
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- 1992
비율차동특성을 이용한 변압기의 실시간 디지탈보호
A real -time digital protection for transformer using percentage differential characteristic
- Suh, Hee-Seok (Dept. of Electrical Eng. Sung Kyun Kwan Univ.) ;
-
Shin, Myong-Chul
(Dept. of Electrical Eng. Sung Kyun Kwan Univ.)
;
- Yoon, Man-Chul (Power System Dept. Research Center KEPCO) ;
- Kim, Il-Dong (Power System Dept. Research Center KEPCO)
- 발행 : 1992.07.23
초록
This paper presents the real time digital differential protection scheme for transformer. Inrush and Internal fault conditions are distinguished by the relative magnitudes of fundamental and second harmonic components which are extracted from differential currents. The algorithm is simulated and implemented using a prototype relay which is made up of Intel 80286 CPU and Motorola DSP-56001. The testing data of inrush and Internal fault signals which are sampled at a rate of 12 times a cycle are obtained by EMTP, and tested In real time using simulator which downloaded those data.
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