표제지
목차
국문요약 8
I. 서론 10
II. 계통보호 전송설비 운용현황 12
2.1. 계통보호 전송설비 개요 12
2.2. 계통보호 전송설비 종류 13
2.2.1. 전력선 반송 13
2.2.2. A/T 14
2.2.3. Digital방식 PITR 14
III. 디지털 계통보호 전송설비 16
3.1. MUX부 17
3.2. D.C 부 18
3.3. PUTT/BFP부 19
3.4. 계전기부 19
IV. 보호계전기와 PITR 연동 20
4.1. 주요 보호계전 방식과 PITR 역할 20
4.1.1. PCM 전류차동 방식 20
4.1.2. 방향비교 트립저지방식 21
4.1.3. 제어 언더리치 전송차단방식 23
4.1.4. 차단기 실패 보호계전방식 24
4.2. 보호계전기와 PITR 인터페이스 25
4.2.1. 보호계전기 방식별 전송 신호 25
4.2.2. 전송지연 시간 26
4.2.3. 송전선로 전압별 계통보호 전송설비 적용 27
V. 계통보호 전송설비 운용 개선방안 28
5.1. 현재상황 28
5.2. 문제점 29
5.3. 개선방안 30
5.4. 구축 및 실험 32
5.4.1. 보호계전기 경보용 접점 개별수용 32
5.4.2. PITR 예비회선 교차수용 방안 선정 33
5.4.3. 보호계전기 및 전송구간 품질 측정 33
5.5. 실험결과 34
5.6. 고찰 38
VI. 결론 40
참고 문헌 42
ABSTRACT 44
Table 1. MUX composition and function 17
Table 2. D.C composition and function 18
Table 3. Protective Relay and PITR interface 26
Table 4. Build-Up Time of Protective Relay 27
Table 5. T/L Voltage and PITR adaptation 27
Table 6. Major review and plan data 31
Table 7. Major total test data 38
Figure 1. PITR network for power system 12
Figure 2. PLC system structure 13
Figure 3. Connection of DC relay and A/T system 14
Figure 4. Sub-parts of Digital PITR 15
Figure 5. Major functions and compositions of PITR 16
Figure 6. Units of PUTT/BFP 19
Figure 7. Units of Relay(94AR BFP, 94P PUTT) 19
Figure 8. Explanation of PCM current method 20
Figure 9. Connection of PCM Relay and PITR 21
Figure 10. DC method logic 22
Figure 11. Connection of DC Relay and PITR 23
Figure 12. PUTT method logic 23
Figure 13. Connection of PUTT Relay and PITR 24
Figure 14. BFP method logic 25
Figure 15. Connection of BFP Relay and PITR 25
Figure 16. Protective Relay and PITR connection example 28
Figure 17. PITR fault and Protective fail of T/L sample 29
Figure 18. Connection of COM1, COM2 and PITR before 30
Figure 19. Connection of COM1, COM2 and PITR after 31
Figure 20. Protective Relay alarm COM1, COM2 separation diagram 32
Figure 21. Measurement for COM2 cross connection 33
Figure 22. Transmission quality measurement method 34
Figure 23. Flow of data line measurement 35
Figure 24. Transmission delay and Bit error measurement 35
Figure 25. Relay and PITR connection before(PITR fail) 36
Figure 26. Relay and PITR connection diagram after(PITR fail) 37