시각동기 오차를 고려한 IEC 61850 기반 중앙집중형 전류차동식 22.9㎸ 모선보호에 관한 연구

다국어 초록 (Multilingual Abstract)

Data exchange are important for reliable operation of IEC 61850 based protections in power systems. In this paper, we demonstrate the acquisition of phasor data using GOOSE and SV and bus differential backup protection based on IEC 61850. Particularly, in IEC 61850 based 22.9kV bus differential backup protection, time synchronization errors among IEDs should be compensated because differential current errors due to time synchronization errors can result in mis-operation of the IED. On the other hand, to transmit GOOSE periodically, the statistical calculation model is needed to update data. In this paper, we propose a method for compensating time synchronization errors using Lagrange interpolation with reference voltages measured at each IED. The test result shows that the proposed method can reduce the differential current error significantly.

목차 (Table of Contents)

• Abstract
• 1. 서론
• 2. GOOSE를 이용한 페이저 데이터 교환
• 3. 보간을 이용한 시각동기 오차 보상
• 3. 결론
• References