• Proceedings of the KIEE Conference
• /
• 2011.07a
• /
• pp.770-771
• /
• 2011

발전사업자는 한국전력거래소(KPX)의 급전지령을 원활히 수행하기 위해 EMS(Energy Management System) RTU를 설치하고 있다. 한국수자원공사는 수력발전소에 전기판넬 형식의 EMS RTU 대신 컴퓨터 기반의 가상(Virtual) EMS RTU를 설치하여 기존의 RTU방식에 비하여 설비 면적을 대폭 줄였으며, 설비 변동에 따른 감시제어 데이터의 수정시 하드웨어적인 작업을 소프트웨어적으로 간단하게 처리할 수 있다. 그래서 가상 EMS RTU는 발전통합운영시스템(GIOS)을 실시간으로 운영, 감시하여 장애를 신속히 복구함으로써 중앙급전소 발전기 원격운전 응답 특성을 향상시켜 전력계통의 안정적인 운영에 크게 기여하고 있다.

• Proceedings of the KIEE Conference
• /
• 1998.11a
• /
• pp.204-207
• /
• 1998

This paper presents a software development technique for EMS applications. The definite client-server configuration is proposed and EMS software package is developed. The developed EMS software package consists of AGC(Automatic Generation Control). Economic Dispatch. State Estimator. Contingency Analysis Simulator and Database Applications. In order to integrate each of the developed modules, EMS Network Server is developed. The proposed package is tested with a sample system. It is expected that the developed package can be easily applicable to the practical system.

• Proceedings of the KIEE Conference
• /
• 2009.04a
• /
• pp.70-71
• /
• 2009

In recent years, a importance of EMS(Electromagnetic Susceptibility) is increased with the spread of a communication device significantly. The compatibility of EMS is evaluated by conduction and radiation of EMI(Electromagnetic Interference). In this paper, a leakage current sensing controller which is considered of industrial EMS is developed. The developed system is consisted of power module, sensing module of leakage current, processer module, display module and communication module. The developed system is evaluated the compatibility of EMS by conduction and radiation of EMI. In evaluation results, the developed system is compatible to the standard of industrial EMS.

• Environmental Mutagens and Carcinogens
• /
• v.18 no.2
• /
• pp.116-122
• /
• 1998

The present investigation has been performed to elucidate the effect of pretreatment with low dose of ultraviolet radiation (UV), ethyl methansulfonate (EMS), and bleomycin (BLM) on cell survival and lectin-binding glycoconjugates of plasma membrane in HeLa cells treated with mutagen. The percentage of survival of cells pretreated with 1 mM EMS following treatment with 10 mM EMS was higher than that of cells treated with 10 mM EMS alone. Wheat germ agglutinin (WGA) staining intensity of cells pretreated with 1 mM EMS and subsequently treated with 10 mM EMS was stronger than that of cells treated with 10 mM EMS alone. But, succinylated wheat germ agglutinin (sWGA) staining intensity of cells pretreated with 1 mM EMS and subsequently treated with 10 mM EMS was similar to that of cells treated with 10 mM EMS alone. These results suggest that the acquired resistance to EMS is related to the glycoconjugates containing sialic acid of plasma membrane involved in multidrug resistance or adaptive response in HeLa cells.

• Proceedings of the KIEE Conference
• /
• 1987.11a
• /
• pp.109-113
• /
• 1987

This paper briefly introduces a strategy of data links between EMS and SCADA systems for the KEPCO's EMS project. For the data links, front end/communication processors are adopted that provide for protocol conversion and communication processing in parallel with EMS/SCADA processing. The data link configuration for a communication channel is point to point links. The EMS - hardware and software - has capability of handling links utilizing both bisync protocol and X.25 (Level 1 and 2)protocol for the data link protocol.

• Environmental Mutagens and Carcinogens
• /
• v.16 no.1
• /
• pp.19-23
• /
• 1996

This study was performed by the sister chromatid exchanges (SCEs) and micronuclei (MN) assays to investigate the adaptive response to ultraviolet light (UV) or ethyl methanesulfonate (EMS) in Chinese hamster ovary (CHO) and Sarcoma 180 (S180) cells. The pretreatment with 1 J/m$^2$ UV or 2 mM EMS decreased the frequency of SCEs induced by the treatment with 5 J/m$^2$ UV or 8 mM EMS in CHO cells. The pretreatment with UV (1 or 2 J/m$^2$) or EMS (1, 2 or 3 mM) did not affect the SCEs induced by the treatment with 7 J/m$^2$ UV or 10 mM EMS in S180 cells. On the other hand, the pretreatment with 1 J/m$^2$ UV or 2 mM EMS decreased the frequency of MN induced by the treatment with 5 J/m$^2$ UV or 8 mM EMS in CHO cells. The pretreatment with UV (1 or 2 J/m$^2$) or EMS (1, 2 or 3 mM) did not affect the frequency of MN induced by the treatment with 7 J/m$^2$ UV or 10 mM EMS in S180 cells. It is suggested that there are adaptive responses at the level of chromosome and micronuclei to UV and EMS in CHO cells.

• Proceedings of the KIEE Conference
• /
• 2007.07a
• /
• pp.408-409
• /
• 2007

한국전력거래소는 2005년 11월부터 한국형EMS(K-EMS; Korean Energy Management System) 개발을 추진 중에 있다. 2010년 10월까지 5년간에 걸쳐 3단계로 개발이 진행되는데 Baseline EMS, Prototype EMS 및 Fullscale EMS가 순차적으로 개발되게 된다. 본 논문에서는 한국형EMS 개발의 전반적인 개발 계획에 대해서 기술하고자 한다.

• Proceedings of the KIEE Conference
• /
• 2008.11a
• /
• pp.139-140
• /
• 2008

한국전력거래소는 전력계통의 안정적, 경제적 운영을 담당하고 있는 기관으로 '01년 현재의 에너지관리시스템(EMS)를 도입하여 실시간 전력계통에 대한 정확한 판단을 기반으로 전력계통의 안정성과 경제성 확보에 주력하고 있다. '06년 EMS S/W를 자체 유지 보수하기로 전력거래소 정책이 결정됨에 따라 상주 유지 보수 업체 인력이 철수하여 IT운전원 1명이 모든 감시 업무를 수행해야만 했다. 이에 따라 업무가 가중되고 효율적인 감시 체계가 만들어질 수 없는 상황이었다. EMS의 1차적 감시는 EMS 자체제공 감시 화면을 통해 가능했으나, 이는 수동적이고 다단계 절차가 필요한 비효율적인 작업이다. 1인에게 집중되어 있던 이러한 감시 작업을 간소화하고 체계화시키기 위하여 분산되어 있던 감시 요소들을 그룹화하고, One-sight 감시가 가능하도록 통합시키는 시스템을 제공하는 것이 거래소 IT 업무의 이슈가 되었다. 본고에서는 이러한 니즈에 따라 개발된 EMS 종합감시시스템에 대해 소개하고자 한다.

• Journal of Ginseng Research
• /
• v.5 no.2
• /
• pp.163-169
• /
• 1981

In order to clarify the biological effects of chemical mutagen, ethyl methane sulphonate (EMS), in M, seedling(Ponax ginseng C. A. Meyer) . the dehiscent seeds of ginseng were treated with EMS for 12 hours at 20t and Post-washed for 24 to 72 hours. The differences of biological injuries in M, generation due to the concentration of EMS were quite obvious in rate and date of germination, stem length, stem diameter, leaf length, leaf width, root length, root diameter, and root weight . Especially, the seeds treated with the high concentration of EMS , above 0.8%, were not germinated The growth injury was directly proportional to the concentration of EMS but not relative to the post-washing time of afire 25 hours. The useful range of EMS concentration and post-washing time in ginseng seeds were 0.4 % - 0.6% and above 24 hours, respectively.

• Journal of Environmental Impact Assessment
• /
• v.15 no.3
• /
• pp.165-178
• /
• 2006

Environmental Impact Assessment (EIA) and Environmental Management Systems (EMS) are perceived by many to be separate environmental tools. EIA serves as a systematic and predictive tool for assessing the potentially significant impacts of developments on the environment. An EMS, on the other hand, is used to consider the key impacts of operational businesses on the environment. The main difference to note is that during the EIA process impacts on developments are predicted. A proposed development has yet to be built and therefore an element of uncertainty is associated with these assessments. With an EMS, the business or organization's processes are already in operation. Even though there is also an element of prediction involved, it is a comparatively easier task to investigate what the environmental impacts of these processes are. However, in contrast with the orientation of EIA to further development actions, EMS involves the review, assessment and incremental improvement of an existing organization's environmental effects. EMS can thus be regarded as a continuation of EIA principles into the operational stage of a policy, plan, program and project. EIA may be carried out without fully supporting necessary informations to EMS.