배전전주용 스테인리스강판 접지전극의 접지 특성분석

국문 초록 (Abstract)

접지시스템은 전기설비의 기준 전위점을 확보할뿐만 아니라 낮은 대지저항으로 고장전류나 과도 전류를 흐르게 한다. 접지임피던스는 주파수에 대한 함수로 고장이나 과도전류가 넓은 범위의 주파수 성분을 포함하기 때문에 접지성능을 평가하는데 중요한 역할을 한다. 본 논문에서는 스테인리스강판 접지전극의 접지특성을 파악하기 위하여 3점 전위강하법으로 접지저항, 접지임피던스와 과도접지임피던스를 측정하였다. 측정된 데이터를 이용하여 접지임피던스와 과도접지임피던스의 등가 전달함수 모델은 ARMA 기법으로 모델링 되었고, 규약접지임피던스로 비교하여 평가하였다.

다국어 초록 (Multilingual Abstract)

Grounding system insures a reference potential point for electric devices and also provides a low impedance path for fault currents or transient currents in the earth. The ground impedance as function of frequency is necessary for determining its performance since fault currents could contain a wide range of frequencies. In this paper, the grounding resistance, grounding impedance and transient grounding impedance are measured by using 3-point fall-of-potential method in order to analyse grounding characteristics of the stainless-steel plate grounding electrode. An equivalent transfer function model of the grounding impedance and transient grounding impedance are identified from the measured values by using ARMA method and evaluated by comparing conventional grounding impedances.

목차 (Table of Contents)

• 요약
• Abstract
• 1. 서론
• 2. 접지임피던스 측정
• 3. 접지임피던스 모델링
• 4. 결론
• References
• 저자소개

참고문헌 (Reference)

1 "피뢰시스템"

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3 L.Ljung, "System Identification" Prentice Hall 1999

4 "NESC(National Electrical Safety Code)"

5 ABEM Instrument Inc, "Instruction Manual for ABEM Transmeter ASA4000"

6 "IEEE Recommended Practice for Electric Power Distribution for Industrial Plants"

7 "IEEE Guide for Safety in Ac Substation Grounding"

8 IEEE Inc, "IEEE Guide for Measuring Earth Resistivity, Ground Impedance, and Earth surface Potential of a Ground system"

9 AVO International Ltd, "Digital Earth Tester Model MEGGER DET 2/2"

10 SES Technologies Ltd, "CDEGS User's Guide"

11 F.A. Wenner, "A Method of Measuring Resistivity" National Bureau of Standards 1916