접지전류 분류계수 및 전위강하곡선법을 이용한 운전 중인 변전소의 접지저항 측정 방법에 관한 연구

다국어 초록 (Multilingual Abstract)

Since transmission and distribution neutral wires are connected with a substation grounding grid, it is very difficult to measure grounding resistance of isolated substation grounding grid after the substation is energized. It is impractical to isolate the grounding grid from other parallel connections such as distribution line neutrals and overhead ground wires for grounding resistance measurement only. In this paper, we proposed and demonstrated a novel measurement method of grounding resistance of isolated substation grounding grid. For this method, grounding current division factor and conventional FOP(Fall-Of-Potential) profiles were measured at power supplying 154[kV] substation. The obtained FOP profile was processed with the measured grounding current division factor to produce the grounding resistance of isolated grounding grid. Simulated FOP profile agreed well with the measured one showing the validity of the proposed method.

목차 (Table of Contents)

• Abstract
• 1. 서론
• 2. 이론고찰
• 3. 실험방법
• 4. 실험결과 고찰
• 5. 결론
• References
• 저자소개

참고문헌 (Reference)

1 윤장완, "지표면전위 해석에 의한 접지저항 측정기법에 관한 연구" 한국조명.전기설비학회 16 (16): 117-123, 2002

2 최 종 기, "접지전류 측정에 의한 다중 접지계통의 접지저항 측정" 대한전기학회 53 (53): 234-237, 2004

3 한국전력공사, "운전 중인 변전소의 접지계통 진단기술 개발연구(사후보고서)" 2003

4 한국전력공사, "운전 중인 변전소의 접지계통 진단기술 개발 연구" 2002

5 SES, "RESAP Users' Manual"

6 SES, "MALT Users' Manual"

7 Heppe, R. J., "Computation of potential at surface above an energized grid or other electrode, allowing for nonuniform current distribution" PAS-98 (PAS-98): 1978-1989, 1979