한국해양대학교

Detailed Information

Metadata Downloads

방사전자파 검출에 의한 폐쇄배전반 상태진단에 관한 연구

Title
방사전자파 검출에 의한 폐쇄배전반 상태진단에 관한 연구
Alternative Title
A Study on the Condition Monitoring Diagnosis of a Closed-Switchboard by Detection of Radiated Electromagnetic Waves
Author(s)
김선재
Publication Year
2011
Publisher
한국해양대학교 대학원
URI
http://kmou.dcollection.net/jsp/common/DcLoOrgPer.jsp?sItemId=000002174952
http://repository.kmou.ac.kr/handle/2014.oak/9090
Abstract
This thesis dealt with a basic study on the development of condition monitoring diagnostic technique for power facilities installed inside closed-switchboards. Major causes of accidents in a closed-switchboard are series arc discharge by incomplete connection and partial discharge by insulation degradation.

The series arc discharge was simulated using a terminal block and an electrode system of a stainless needle-carbon rod. The corona discharge was simulated in five types of electrode system which consist of a needle and a plane electrode. The experiment was carried out in an electromagnetic shielding room, and the measurement system was composed of an Ultra log antenna of 30MHz∼2GHz and an EMI test receiver of 150kHz∼2GHz, and a spectrum analyzer.

Frequency spectrum of series arc discharge was distributed in ranges of 30MHz∼200MHz for the needle-carbon rod and of 30MHz∼400MHz for the terminal block. In corona discharge, frequency spectrum existed in ranges of 30MHz∼2GHz depending on types of electrode system.

The experimental results showed that frequency spectrum is different as abnormal condition varies, and the inner space of a closed-switchboard is not influenced by outer noise generated by electrical accident or broadcast wave.

Consequently, it is possible to diagnose the condition of closed-switchboards by detecting radiated electromagnetic waves.
Appears in Collections:
전기전자공학과 > Thesis
Files in This Item:
000002174952.pdf Download

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

Browse