• 한국안전학회지
• /
• 제25권6호
• /
• pp.75-80
• /
• 2010

본 논문에서는 일반용 전기설비 중에서 전기안전관리의 사각지대로 분류되는 보안등 전기설비를 대상으로 전기안전요소들을 계측하고 원격 모니터링 할 수 있는 보안등 원격점검시스템을 개발하였다. 단말기에서 센싱하는 누설전류는 위상차 측정법을 이용한 저항성분 누설전류(Igr) 측정 알고리즘을 이용하였으며, 계측데이터 전송을 위한 중계기와 MMI에서 모니터링 할 수 있는 시스템을 제작하였으며, Igr 누설전류 검출 알고리즘의 타당성을 확인하기 위해 실험실 기반의 성능시험으로 누설전류의 안정도를 확인하였다.

• 대한전기학회:학술대회논문집
• /
• 대한전기학회 2008년도 춘계학술대회 논문집 전기설비전문위원
• /
• pp.96-99
• /
• 2008

On-line condition monitoring is a useful tool for maintaining and extending the longevity of power transformers. An intelligent diagnostic system is desirable for operational safety and reliability. Bringing these concepts together results in a powerful support tool for engineers, reducing the volume of data to deal with, and making the data more meaningful. This paper describes how a multi-agent system for diagnosing the cause of transformer partial discharge activity was coupled with a method of UHF partial discharge monitoring, creating an on-line condition monitoring system. The challenges presented by the on-site environment are discussed, along with the implications for the complete system.

• 전자통신동향분석
• /
• 제35권1호
• /
• pp.49-59
• /
• 2020

This paper describes an IoT-based electrical safety management system for managing the electrical power distribution systems in factories or buildings and for managing private electrical devices in apartment complex. The IoT-based electrical safety management system collects IoT data from the electrical facilities or devices to provide various electrical safety services. In some cases, it uses an IoT adaptor to collect data from legacy facilities. By monitoring and analyzing the IoT data, it is possible to provide protection from and prevent electrical hazards. In addition, an IoT-based electrical safety management system can benefit from using the IoT identification system and standardized data model of the electrical facilities and devices. An IoT identification system is used to increase manageability of large-scale electrical facilities which consists of numerous IoT devices. A standardized data model is used to support interoperability. This paper also explores some international and Korean standards related to IoT-based electrical safety management.

• 한국안전학회지
• /
• 제20권3호
• /
• pp.1-8
• /
• 2005

The industrial induction motor is widely used in the rotating electrical machine for the transmission of power. It is very reliable equipment, but it could lead to the loss of production and lift when failure occurs. Therefore, the failure data is acquired and analyzed by attaching an exclusive instrument to existing induction motor. However, these instruments could lead to side effects, increasing the production costs, because they are very expensive. The purpose of this study is the development of an induction motor bearing failure diagnosis system constructed using LabVIEW which can be supplied the kernelled function, process monitoring and current signature analysis. In addition, the availability and reasonability of the constructed system was examined for an induction motor with failure defects in outer raceway and ball bearing. From the results, it shows that failure diagnosis system constructed is useful for real-time monitoring with detection of bearing defects over the web.

• 한국전기전자재료학회:학술대회논문집
• /
• 한국전기전자재료학회 2004년도 하계학술대회 논문집 Vol.5 No.1
• /
• pp.441-444
• /
• 2004

Each electrical apparatus radiates various infrared as the condition of surface and load current. Because heat distribution of the apparatus changes as the condition, it is able to analyze the condition of the apparatus by using the distribution. However, methods having been used to measure the heat distribution cannot compare normal condition with abnormal, and the apparatus has diagnosed by intuition. This paper deal with a program that is able to analyze changed temperature distribution. The program is to analyze temperatures on pixels in selected region of interest or position and is able momently and logically to analyze condition of the apparatus. The results are able to apply to a on-line monitoring system.

• 전기학회논문지P
• /
• 제59권2호
• /
• pp.158-162
• /
• 2010

PSD is automatically opened and closed when subway train arrive on the station. This system was designed to control electric automatic system. These doors will provide passenger safety, energy saving and a good environment in subway. The monitoring and control systems of PSD are configured so that they can be operated in automatic mode in connection with ATO through the composite control panel in the station control room. The objective of this paper is to obtain high reliability that is essential for monitoring and control systems of PSD. The power supply is based on protection circuit using DC power bridge from two UPS. Also, stable communication system consists of CAN communication line redundancy and RF cross protection algorithm. Monitoring state display results show the validity of the proposed high reliability monitoring and control systems of PSD.

• 대한전기학회논문지:전기기기및에너지변환시스템부문B
• /
• 제54권6호
• /
• pp.261-268
• /
• 2005

This paper propose the safety design of automatic train control system which is used for controlling and monitoring train speed not to excess a permitted speed. Safety activities are shown for the computerized system to achieve a required safety requirement. The safety activities are composed of system dynamic modelling to identify potential hazards contained in the target system, to analyze sub system faults to provoke the hazards. Risks analysis are carried out to estimate losses caused from the hazards to allocate safety requirement. We Proposed design solutions for sub system to meet safety requirement.

• 한국조명전기설비학회:학술대회논문집
• /
• 한국조명전기설비학회 2008년도 춘계학술대회 논문집
• /
• pp.365-368
• /
• 2008

This paper introduce the model of remote monitoring system that combine information technology in electrical safety checks that has been done by professional staff. And for general use, electrical safety Value-Added Service using remote check data were presented. In the near future, If demand and interests of Value-Added Service will be increased, this will be a electrical safety Value-Added Service as an important role in the blind spot of country electricity disaster.

• 한국산학기술학회논문지
• /
• 제10권9호
• /
• pp.2267-2273
• /
• 2009

본 논문에서는 부하전류, 누설전류, 아크고장과 같은 전기재해 위해 요소의 적절한 관리를 위해 유비쿼터스 환경에서 운영되는 실시간 감시 및 관리 시스템을 개발하고, 이를 이용한 국가전기안전망이 구축 방안이 제안되었다. 그리고 개발된 시스템과 제안된 안전망의 유용성 및 신뢰성을 확인하기 위해, 개발된 지능형 분전반을 전주한옥마을 28개 수용가에 설치하여 시범 운영하였다. 제안된 국가전기안전망이 일반용전기설비 수용가에 완전히 구축된다면, 전기안전에 대한 주요 관리가 일반 사용자에서 전문가에 의한 실시간 관리체계로 전환되는 효과가 있을 것이다. 그 결과 전기화재의 주요 원인인 과부하, 아크고장, 누전에 의한 화재가 예방될 수 있을 것이다.

• 대한전기학회:학술대회논문집
• /
• 대한전기학회 2002년도 하계학술대회 논문집 A
• /
• pp.259-261
• /
• 2002

Recently, according to the spread of semiconductor applied technology like motor speed control contrivance, power conversion installation and so on, harmonic ingredients occurred in switching operation flow into a distribution system and increase voltage distortion of distribution system and bring on obstacles like damage, lowering of capability, false operation and so on of various electrical installation. So, in order to consider a countermeasure to limit occurrence quantity of harmonic source, harmonic interception and others, precision measurement and analysis on voltage, current, power, power factor, the each ingredient of harmonic order, the percentage of total harmonic distortion and so forth are needed. In this paper monitoring system to measure and analyze power quality connected with power harmonics was developed and it's performance is verified by measuring and analyzing three-phase voltage and current of R, S, T in the three-phase and four-wire system using the developed measurement system.