• 조명전기설비학회논문지
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• 제19권6호
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• pp.75-81
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• 2005

최근 제어설비 계통은 전력변환장치와 센서등의 사용이 증가함에 따라 많은 노이즈가 발생되어 설비의 오동작이나 제어 회로의 메모리 손실과 같은 문제들이 야기되고 있다. 따라서, 본 논문에서는 다양한 제어설비 계통에서 발생되고 있는 노이즈의 특성을 계측하고 분석하였다. 또한 NCT, 등전위 접지, PNR, 노이즈필터 등을 사용한 노이즈저감 대책을 적용한 결과로 이들 대책들이 노이즈 문제 해결에 매우 효과적임을 확인하였다.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2007년도 추계학술대회 논문집 전력기술부문
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• pp.328-330
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• 2007

Recently, the research of PM (Preventive Maintenance) method on the RCM(Reliability-Centered Maintenance) of the system equipment is being actively advanced for a few years. The state of the power equipment is maintained like the states of the between 'as good as new ones' and 'as bad as old ones' by imperfect Maintenance that implies the life decrease of the equipment by frequent breakdown, the error of maintenance process, and so on. So, the Maintenance method considering the real case has to reflect Imperfect maintenance than perfect maintenance. This paper suggests the Preventive Maintenance method by using Quasi - Renewal Theory for the gas turbine equipment as deliberating the imperfect maintenance for the real cases.

• 한국조명전기설비학회:학술대회논문집
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• 한국조명전기설비학회 2005년도 춘계학술대회논문집
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• pp.325-330
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• 2005

최근 제어설비 계통은 전력변환장치와 센서의 사용이 증가하여 많은 노이즈가 발생되고 있다. 이 노이즈로 인해 설비의 오동작과 제어 회로의 메모리 손실이 발생된다. 따라서, 본 논문에서는 제어설비 계통의 노이즈 발생량을 계측 분석하였고, 이에 따라 NCT, 등전위 접지, PNR, 노이즈필터와 같이 노이즈 감소를 위한 효과적인 보호설비를 적용하였고 계측 결과를 제시하였다.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2007년도 제38회 하계학술대회
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• pp.742-743
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• 2007

A maintenance plan of power system equipment reduces failure rate caused by equipment's age. To prevent unexpected failure, the maintenance is performed periodically according to the interval time. The more expansive equipment's scale is, the more the maintenance without considering costs sustains a economical loss. Hence, the maintenance's time and the cost must be considered when maintenance which is considering the reliability is implemented. In this paper, optimum maintenance interval is calculated by considering minimum maintenance cost of the equipment with the combined cycle units in Korea power systems.

• Nuclear Engineering and Technology
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• 제36권2호
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• pp.184-195
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• 2004

The multi-tasking feature of digital I&C equipment could increase risk concentration because the I&C equipment affects the actuation of the safety functions in several ways. Anticipated Transient without Scram (ATWS) is a typical case of safety function failure in nuclear power plants. In a conventional analysis, mechanical failures are treated as the main contributors of the ATWS. This paper quantitatively presents the probability of the ATWS based on a fault tree analysis of a Korea Standard Nuclear Power Plant is also presented. An analysis of the digital equipment in the digital plant protection system. The results show that the digital system severely affects the ATWS frequency. We also present the results of a sensitivity study, which show the effects of the important factors, and discuss the dependency between human operator failure and digital equipment failure.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2017년도 추계 학술논문 발표대회
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• pp.183-184
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• 2017

Some of the information created during the design phase of an New NPP life cycle is useful only for the execution of the construction phase; however, much of the information greatly impacts the longer-term operational phase. To most make use of design and construction information produced by data based design system during the construction and operation phase, This research is identified controlled data and drawn design information of controlled equipment from documents generated during the life-cycle stages. This study aimed to analyze related documents to assure traceability of controlled equipment from design phase through O&M and then suggested DB(Data Base) based control method on technical information of major equipment throughout nuclear power plant lifecycle.

• 시스템엔지니어링학술지
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• 제14권1호
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• pp.1-12
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• 2018

In the energy-guzzling industries such as steel making and cement, power plants utilizing waste heat have been attracting attention to increase energy efficiency. However, the existing economic analysis system doesn't consider the special working fluids and the cost models of the main equipment used in the waste heat recovery power plant. So it is difficult to estimate the plant economics accurately. Therefore, It is required to develop a economic analysis module that can more accurately evaluate for the power plant. In this study, the systems engineering approach was used to design and develop the module that systematically reflects the characteristics of the power plant and various requirements. Specifically, first, the special working fluids and main equipment applied to the power plant were investigated. Next, the cost models for each equipment were developed. Finally, the economic analysis module based on this was developed.

• 조명전기설비학회논문지
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• 제21권7호
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• pp.29-36
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• 2007

태양 전지, 연료 전지 및 소규모 풍력발전 등 소규모 분산 전원의 보급에 따라, 소규모 전력 수용가측의 전원 구성은 종래의 단일 전력 사업자로부터 전원을 공급 받는 방식에서 분산 전원과 연계하여 동시에 사용하는 방식으로 바뀌고 있다. 이에 따라 분산전원을 사용하는 수용가에서는 계통과 연계하여 운전되는 분산 전원에 대한 상시 감시 제어 시스템이 요구된다. 이에 본 논문에서는 감시제어 시스템을 구성하는데 필수적으로 요구되는 계통의 전압, 전류 등을 측정하기 위한 시스템을 구현하였다. 그리고 계통의 정상상태는 물론 전원 투입과 탈락 시, 부하의 급격한 증감 시 발생하는 과도현상 데이터 등을 실시간으로 계측하고, 측정된 데이터들을 여러 가지 목적으로 사용할 수 있도록 USB 통신을 이용 PC로 전송하여 저장한다. 또한 PC에 전송된 데이터를 계측기를 사용한 측정 결과와 비교하여 제작한 시스템의 신뢰성을 검증한다.

• 한국데이타베이스학회:학술대회논문집
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• 한국데이타베이스학회 2010년도 춘계국제학술대회
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• pp.33-41
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• 2010

Recently the number of IT equipment have increased. It consumes large amounts of energy and is emissions of greenhouse gases. Co2 emissions with the PC and the monitor has the highest percentage to 39% more than other IT equipment. In addition, Plan for your PC's power management and technology development is being pursued in developed countries. To reduce energy costs of organizations with large numbers of the PC and to cut down on Co2 emissions, the energy load control technology of ACPI standards-based PC IS suggested. AMI-based PC power-management system was constructed, Approximately 20% of operating a result of the test power consumption was reduced. Looking at the case of the United States, PC monitors from the University of Wisconsin-Oshkosh was Sleep mode. As a result, the monitor on a, $ 20 for a year reduced energy costs. In GE(General Electronic), Approximately 75,000 PC's power setting time was Monitor Off :15 minutes/ Hard Drives Off 30 minutes/ System Standby 30 minutes/ Hibernation mode 2 hours. 1 year, electric bill was $ 2.5 million savings and 3 years electric bill was $ 6.5 million savings. Measuring energy usage data, using the measured data, electric energy management technology is not. Platform development to measure energy usage for Individual energy-consuming equipment is urgently required.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2001년도 하계학술대회 논문집 A
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• pp.476-478
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• 2001

Coordination under short-circuit conditions is a systematic application of protective devices in the electrical power system, which, in response to a fault, will remove only a minimum amount of equipment from service. The objective is not only to minimize the equipment damage and process outage costs, but also to protect personnel from the effects of these failures. The coordination study of an electric power system consists of an organizes time-current study of all devices in series from the utilization device to the source. This study is a comparison of the time it takes the individual devices to operate when certain levels of normal or abnormal current pass through the protective devices. The objective of a coordination study is to determine the characteristics, ratings, and settings of overcurrent protective devices that will ensure that the minimum unfaulted load is interrupted when the protective devices isolate a fault or overload anywhere in the system. At the same time, the devices and settings selected should provide satisfactory protection against overloads on the equipment and interrupt short-circuit as rapidly as possible.