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논문 기본 정보

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학위논문
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강경두 (경북대학교, 경북대학교 산업대학원)

지도교수
김진규
발행연도
2018
저작권
경북대학교 논문은 저작권에 의해 보호받습니다.

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이 논문의 연구 히스토리 (2)

초록· 키워드

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본 논문에서는 가공송전선로에서 발생하는 유도장해 현상을 분석하고, 유도장해 최소화가 가능한 최적 상배열을 제안하였다. 정전유도에 대해서는 지표면에서 전계강도가 기준 전계강도를 만족하는 상배열을 검토하고, 전자유도에 대해서는 정상시와 1회선 정지시로 각각 구분하여 가공지선으로 유도되는 전류의 크기를 계산하여 상배열에 따른 유도장해 특성을 연구하였다.
먼저 유도장해 검토를 위해 전압별 해석대상 모델을 선정하고, 검토대상 상배열 조합을 선정하였다.
정전유도에 의한 지표면에서 전계강도 계산은 인가된 전압과 도체가 보유하고 있는 전하와의 관계에서 전위계수를 구하고 전하량을 계산하였다. 산출결과 기준 전계강도를 만족하는 최적 상배열은 ABC-CBA, BCA-ACB, CAB-BAC로 제시되었다.
전자유도에 의한 가공지선 유도전류는 도체에 흐르는 전류와 전력선-가공지선 상호 임피던스와의 곱으로 계산된다. 전선의 자체 및 상호 임피던스는 emtp 프로그램을 활용하여 계산하였다. 그리고 가공지선 유도전류는 송전용량 80%를 기준하여 계산하였다. 계산결과, 전자유도로 인한 가공지선 유도전류 계산에서도 정전유도와 동일하게 ABC-CBA, BCA-ACB, CAB-BAC가 가장 적합한 상배열 조합으로 제안되었다.
본 논문은 가공송전선로에서 발생하는 유도장해에 대하여 다양한 상배열 조합을 조건으로 지표면 전계강도와 가공지선 유도전류를 계산하여 결과를 제시하고 분석하였다. 이 연구를 통하여 유도장해 저감이 가능한 상배열 조합과 설계기법을 제시함으로써 송전선 설계시공에 활용되기를 기대한다.

목차

1. 서 론···················································································································1
1.1. 연구의 필요성 ···························································································1
1.2. 연구의 개요·································································································2
2. 유도장해 개요·····································································································4
2.1. 서론 ···············································································································4
2.2. 정전유도·······································································································9
2.3. 전자유도·····································································································17
3. 가공 송전선의 유도장해 모델 ·······································································21
3.1. 유도장해 모델 선정·················································································21
3.2. 모델에 대한 선로정수·············································································23
3.3. 전력선/가공지선 허용전류······································································27
3.4. 역행렬 계산·······························································································28
4. 유도장해를 적용한 최적 상배열···································································31
4.1. 상배열 조합·······························································································31
4.2. 정전유도 계산···························································································32
4.2.1. 상배열별 지표면전계강도 계산······················································32
4.2.2. 정전유도를 고려한 최적 상배열····················································40
4.3. 전자유도 계산···························································································41
4.3.1. 유도전류 계산을 위한 전력선 부하전류······································42
4.3.2. 가공지선 유도전류 계산··································································42
4.3.3. 전자유도를 고려한 최적 상배열····················································45
5. 결 론·················································································································47
참고문헌··················································································································49
부 록 ················································································································52
Abstract ··················································································································54

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