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Abstract 11
I. 서론 12
1. 연구의 배경 및 필요성 12
1) 기술적 측면 13
2) 사회적 측면 13
3) 정책적 측면 14
4) 국가기술개발 측면 14
2. 연구의 동향 15
1) 국내 기술 동향 및 수준 15
2) 국외 기술 동향 및 수 16
3. 연구의 목표 19
II. 건전성 지수의 정식화 방법 20
1. 전력계통 상태영역 및 건전성 지수(PSHI)의 개념 20
1) 기존의 계통운영의 표준 상태공간모형 20
2) 전력계통 상태영역 및 건전성 지수(PSHI) 정의 22
2. PSHI 정식화 24
1) PSHI 정식화 요소 24
2) 주파수 정식화 25
2) 전압 정식화 30
3) 운영예비력 정식화 37
4) 주파수조정예비력 정식화 40
5) 송전선로 과부하 정식화 43
6) 변압기과부하 정식화 46
7) SPS 공급적정도의 정식화 49
3. 건전성 지수 출력함수 55
1) Inverse Proportional 56
2) Piecewise Linear Proportional 56
4. 건전성 지수의 Mapping 방법론 개발 58
5. 종합 PSHI 평가방법 61
1) 평균치 이론 61
2) PSHI 의 평균치 이론 적용 64
III. 전력계통 건전성 감시 프로그램 개발 67
1. 프로그램 입력구성 67
2. 프로그램 실행결과 구성 68
3. 프로그램 전체 구성 69
IV. 전력계통 건전성 지수 시각화 방법 70
1. PSHI의 시각화 70
1) 엑셀을 이용한 PSHI의 시각화 방법 70
2) 맥북을 이용한 PSHI의 시각화 방법 71
V. 사례연구 72
1. 샘플입력 데이터를 이용한 PSHI 시뮬레이션 72
2. 시나리오 구성 및 시뮬레이션 결과 77
1) 시나리오 1의 계통상황 및 시뮬레이션 결과 77
2) 시나리오 2의 계통상황 및 시뮬레이션 결과 79
3) 시나리오 3의 계통상황 및 시뮬레이션 결과 81
4) 시나리오 4의 계통상황 및 시뮬레이션 결과 83
5) 시나리오 5의 계통상황 및 시뮬레이션 결과 85
6) 시나리오 6의 계통상황 및 시뮬레이션 결과 87
VI. 결론 89
참고문헌 91
부록 93
부록 1. 우리나라 예비력 기준(2015년도) 93
부록 2. PSHI 알고리즘 검증 시나리오 입력데이터 자료 94
Table 1. PRA indicators and impact 17
Table 2. Normal, alert, emergency, and extreme emergency status criteria 21
Table 3. Spatial domains of wellbeing analysis system status 21
Table 4. Differences between wellbeing analysis model and PSHI techniques 22
Table 5. Target items for PSHI 24
Table 6. Frequency reliability standard laws and three domain standards based on... 26
Table 7. Variables of three standard domains of frequency 26
Table 8. 345kV voltage reliability standard laws and three domain standards based... 31
Table 9. Variables of three standard domains of 345kV Voltage 31
Table 10. 765kV voltage reliability standard laws and three domain standards based... 32
Table 11. Variables of three standard domains of 765kV voltage 32
Table 12. Based on medium load 154kV voltage reliability standard laws and three... 34
Table 13. Variables of three standard domains of based on medium load 154kV... 34
Table 14. Upon load changes 154kV voltage reliability standard laws and three... 34
Table 15. Variables of three standard domains of upon load changes 154kV voltage 35
Table 16. Based on light load 154kV voltage reliability standard laws and three... 35
Table 17. Variables of three standard domains of based on night load 154kV... 35
Table 18. Operating reserve power reliability standard laws and three domain... 38
Table 19. Variables of three standard domains of operating reserve power 39
Table 20. Frequency regulation reserve power reliability standard laws and three... 41
Table 21. Variables of three standard domains of frequency regulation reserve power 42
Table 22. Overload of lines reliability standard laws and three domain standards... 44
Table 23. Variables of three standard domains of overload of lines 45
Table 24. Overload of transformers reliability standard laws and three domain... 47
Table 25. Variables of three standard domains of overload of transformers 48
Table 26. Special protection scheme reliability standard laws and three domain... 50
Table 27. Variables of three standard domains of special protection scheme 51
Table 28. Reliability standard laws and three domain standards based on expert interview from supply adequacy standpoint 53
Table 29. Reliability standard laws and three domain standards based on expert interview from supply security standpoint 54
Table 30. Domain formula of piecewise linear proportional output function model of... 57
Table 31. Example of frequency sample input data at intervals of 2 seconds from... 73
Table 32. Example of frequency sample input data at intervals of 2 seconds from the... 74
Table 33. PSHI value from the perspective of adequacy 75
Table 34. PSHI value from the perspective of security 76
Table A.1. Reserve power standard of the Korean electricity market operations... 93
Table A.2. Frequency sample input data 94
Table A.3. Voltage sample input data 97
Table A.4. Operating reserve powers ample input data 101
Table A.5. Frequency regulation reserve power ample input data 103
Table A.6. Overload ample input data 105
Table A.7. Low Voltage sample input data 109
Table A.8. Power transfer limits among areas sample input data 110
Fig. 1. Power system wellbeing analysis developed by university of Saskatchewan in... 16
Fig. 2. China's Huazhong operating composite index operation screen 18
Fig. 3. System Operating States to Recognize Local load Interruptions, Controlled... 20
Fig. 4. Concept of PSHI domain and definition 23
Fig. 5. Frequency reliability standard laws and concept map of three domain... 26
Fig. 6. An example: frequency PSHI domain proposed newly in this paper 27
Fig. 7. A directivity model regarding health index variation of frequency 29
Fig. 8. 345kV and 765kV voltage reliability standard laws and concept map of three... 31
Fig. 9. 154kV voltage reliability standard laws and concept map of three domain... 33
Fig. 10. An example: voltage PSHI domain proposed newly in this paper 36
Fig. 11. Operating reserve power reliability standard laws and concept map of three... 38
Fig. 12. An example: operating reserve power PSHI domain proposed newly in this... 39
Fig. 13. Frequency regulation reserve power reliability standard laws and concept... 41
Fig. 14. An example: frequency regulating reserve power PSHI domain proposed... 42
Fig. 15. Overload of lines reliability standard laws and concept map of three domain... 44
Fig. 16. An example: overload of lines PSHI domain proposed newly in this paper 45
Fig. 17. Overload of transformers reliability standard laws and concept map of three... 47
Fig. 18. An example: overload of transformers PSHI domain proposed newly in this... 48
Fig. 19. Special protection system reliability standard laws and concept map of three... 50
Fig. 20. An example: special protection scheme PSHI domain proposed newly in this... 51
Fig. 21. Four kinds of output function models of PSHI proposed newly in this paper 55
Fig. 22. Inverse proportional output function model of PSHI 56
Fig. 23. Piecewise linear proportional output function model of PSHI 56
Fig. 24. Flow chart for mapping PSHI into domain 58
Fig. 25. Equal interval adjustment concept of PSHI mapped into three domains 60
Fig. 26. Average concept from semicircles 63
Fig. 27. Sample input data screen of PSHI 67
Fig. 28. Result Screen of PSHI program 68
Fig. 29. Comprehensive concept scheme of the PSHI proposed in this paper 69
Fig. 30. Screen of PSHI visualization using EXCEL 71
Fig. 31. Screen of PSHI visualization using MacBook 71
Fig. 32. Scenario 1 simulation PSHI visualization screen before failure 78
Fig. 33. Scenario 1 simulation PSHI visualization screen after failure 78
Fig. 34. Scenario 2 simulation PSHI visualization screen before failure 80
Fig. 35. Scenario 2 simulation PSHI visualization screen after failure 80
Fig. 36. Scenario 3 simulation PSHI visualization screen before failure 82
Fig. 37. Scenario 3 simulation PSHI visualization screen after failure 82
Fig. 38. Scenario 4 simulation PSHI visualization screen before failure 84
Fig. 39. Scenario 4 simulation PSHI visualization screen after failure 84
Fig. 40. Scenario 5 simulation PSHI visualization screen before failure 86
Fig. 41. Scenario 5 simulation PSHI visualization screen after failure 86
Fig. 42. Scenario 6 simulation PSHI visualization screen before failure 88
Fig. 43. Scenario 6 simulation PSHI visualization screen after failure 88
초록보기 더보기
This paper proposes probabilistic Power System Health Index(PSHI). The paper describes several kinds of power system health indices based on two main categories, which are adequacy and security. In adequacy, four kinds of health indices of Frequency, Voltage(154kV, 345kV and 765kV), Reserve(Operating Reserve Power and Frequency Regulation Reserve Power) and Overload of lines and transformers are proposed. In security, four kinds of health indices of Voltage(154kV, 345kV and 765kV), Overload of lines and transformers, Power transfer limits among areas and Special Protection System(SPS) are proposed. All indices are mapped into three domains, which are Health, Margin and Risk, defined with expert interview. While definition of domain of health, margin and risk is similar with the conventional wellbeing analysis of power system, definition of the domain proposed in this paper comes from expert system based on expert interviews. The several kinds of health index functions, which are linear ratio, piecewise linear ratio and reverse ratio function etc, are developed in this paper.
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