• 전기학회논문지
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• 제61권5호
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• pp.669-675
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• 2012

Recently, the amount of electrical heat pump(EHP), a electrical conditioning equipment, is sharply increasing due to the luxury and multi-story trend of building. Accordingly, the cooling load that occupying substantial part of summer electric consumption has increased dramatically, making difficulties in domestic supply of electricity in summer. There are some efforts to replace it with an alternative cooling equipment such as gas heat pump(GHP), a gas cooling equipment, in order to solve the problem of summer electricity supply through reducing the summer electricity peak. It is rare, however, to find studies on the actual effects of GHP on the reduction of summer electricity peak. This study, therefore, estimated the effects of the GHP on the summer electricity peak by the gas consumption and characteristics of gas cooling systems. In addition, electric substitution effects by gas cooling systems were analyzed through case studies in the summer of 2010.

• 한국신재생에너지학회:학술대회논문집
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• 한국신재생에너지학회 2006년도 춘계학술대회
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• pp.343-346
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• 2006

Although renewable energy sources are more environmentally friendly than fossil energy sources, it is far more costly, considering current technological standards. It would not present many competitive advantages in the power market. If the renewable electricity is viable in the market, the government should take 'visible' actions to compensate production costs. Popular policies, such as Feed-In-Tariff and Renewable Portfolio Standards, can help to attract investors into generators of renewable electricity. But presently, they are mainly financed through a undifferentiated increase of electricity bills and occasionally confronted with the opposition of the electricity consumers. And most policies tend to focus on increasing the supply of renewable electricity with little consideration toward elevating the motivation of consumers. This study evaluates the potential of environmentally friendly energy consumption and examines the 'green pricing' program which realize the potential.

• KIEE International Transactions on Power Engineering
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• 제5A권4호
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• pp.416-424
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• 2005

At present, the Korean electricity industry is undergoing restructuring and the Cost Based-generation Pool (CBP) market is being operated in preparation of a Two Way Bidding Pool (TWBP) market. In deregulated electricity industries, an integrated power market simulator is one of the tools that can be used by market participants and market operators analyzing market behaviors and studying market structures and market codes. In this regard, it is very important to develop an electricity market simulator that reflects market code providing a market operation mechanism. This paper presents the development of an integrated market simulator, called the Power Exchange Simulator (PEXSIM), which is designed to imitate the Korean electricity market considering the various features of the market operating mechanism such as uniform price and constrained on/off payment. The PEXSIM is developed in VB.NET and composed of five modules whose titles are M-SIM, P-SIM, O-SIM, T-SIM and G-SIM interfacing the Access database program. To verify the features and the performance of the PEXSIM, a small Two Way bidding market with a 12-bus system and a One Way bidding market for generator competition will be presented for the electricity market simulations using PEXSIM.

• 한국인터넷방송통신학회논문지
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• 제12권4호
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• pp.103-109
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• 2012

본 논문은 현재 급격히 증가하는 전력을 효율적으로 관리하고 낭비를 최소화하기 위한 전력 관리 시스템을 제안한다. 기업, 공장, 관공서, 학교 등의 환경에 최적화된 USN(Ubiquitous Sensor Network)을 기반으로 한 산업용 전력관리시스템을 구현하였다. 콘센트에 직접 부착하여 전력량 측정 및 전력제어가 가능하다. 전력센서를 PLC(Power Line Communication)와 TCP/IP 통신을 통하여 하나의 네트워크로 구성하고 전력을 감시 및 제어한다. 수집된 데이터를 기반으로 전력을 효율적으로 유지관리 할 수 있으며, 또한 안드로이드 기반 앱을 통하여 언제 어디서나 서버에 접속하여 전력량을 관리하고 낭비되는 전력을 효율적으로 관리할 수 있는 시스템을 구현하였다.

• 조명전기설비학회논문지
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• 제22권2호
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• pp.35-41
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• 2008

본 논문에서는 새로운 수요관리 자원으로 대두되고 있는 조광제어의 잠재량과 가치평가, 활용방안을 제시하고자한다. 현재 전력IT기술이 발전하고 있으며, 이는 수요관리 분야에도 많은 기회를 제공하고 있다. 특히 조광제어는 실시간 요금이 변하는 전력시장에서 전력IT 기술을 통해 그 가치를 드러내고 있다. 또한 본 논문에서는 조광자원이 변화하고 있는 전력산업 환경에서, 효율향상뿐 아니라 부하관리 측면에서도 매우 효과적인 수요자원임을 검증코자한다.

• 한국산학기술학회논문지
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• 제21권12호
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• pp.52-59
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• 2020

현행 국내의 주택용 전기요금은 월 전력 사용량에 따라 누진 단계를 적용하여 부과하는 방식으로 전기사용량이 많을 경우 전기요금이 급격하게 상승하는 구조로 이루어져 있다. 이러한 획일화된 전기요금 누진제는 소비자의 전력소비 패턴에 대한 고려가 부족한 점과 소비자의 선택권을 제한하는 측면에서 한계가 있다. 이에 산업통상자원부와 한국전력공사에서 계절과 시간대별 전기사용량에 따라 전기요금을 부과하는 방식인 주택용 계시별 요금제 기반의 실증이 이루어지고 있다. 본 논문에서는 대도시 소재 아파트 단지 5개동 362세대의 5년간 AMI 데이터 분석을 통해 10개의 전기사용 패턴을 도출하였다. 도출된 패턴을 국내의 기존 요금제인 주택용 전기요금제 및 현재 실증에 적용하고 있는 계시별 요금제인 일반형과 집중형 요금제 등 3개 요금제와 미국과 호주의 계시별 요금제 3개에 적용하여 각 패턴 별 선택형 요금제의 효과를 전기요금 편익 측면에서 분석한 결과 기존 요금제 대비 5개 패턴에서는 편익이 발생하였고 5개 패턴에서는 오히려 전기요금이 증가하였으며 이러한 현상은 실증 중인 국내요금을 포함하여 해외 요금제에서도 동일한 현상을 보이고 있음을 확인하였다.

• 전기학회논문지
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• 제63권11호
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• pp.1503-1510
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• 2014

This study organizes scenarios on the power supply plans and electricity load forecasts considering their uncertainties and estimates natural gas quantity for electricity generation, total electricity supply cost and air pollutant emission of each scenario. Also the analysis is performed to check the properness of government's natural gas demand forecast and the possibility of achieving the government's CO2 emission target with the current plan and other scenarios. In result, no scenario satisfies the government's CO2 emission target and the natural gas demand could be doubled to the government's forecast. As under-forecast of natural gas demand has caused the increased natural gas procurement cost, it is required to consider uncertainties of power plant construction plan and electricity demand forecast in forecasting the natural gas demand. In addition, it is found that CO2 emission target could be achieved by enlarging natural gas use and demand-side management without big increase of total costs.

• 한국컴퓨터정보학회논문지
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• 제23권5호
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• pp.9-14
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• 2018

For an efficient management of electricity market and power systems, accurate forecasts for electricity demand are essential. Since there are many factors, either known or unknown, determining the realized loads, it is difficult to forecast the demands with the past time series only. In this paper we perform a cluster analysis on electricity demand data collected from Jan. 2000 to Dec. 2017. Our purpose of clustering on electricity demand data is that each cluster is expected to consist of data whose latent variables are same or similar values. Then, if properly clustered, it is possible to develop an accurate forecasting model for each cluster separately. To validate the feasibility of this approach for building better forecasting models, we clustered data with t-SNE. To apply t-SNE to time series data effectively, we adopt the dynamic time warping as a similarity measure. From the result of experiments, we found that several clusters are well observed and each cluster can be interpreted as a mix of well-known factors such as trends, seasonality and holiday effects and other unknown factors. These findings can motivate the approaches which build forecasting models with respect to each cluster independently.

• 동굴
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• 제85호
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• pp.1-14
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• 2008

Electroluminescent Display(ELD) will be the innovative ideas to replace existed electricity illumination systems that consider to under effectiveness and environmental pollution generators in the commercial caves because ELD has less heat and low electricity consumption by the new illumination materials. Characteristics of the ELD are as following: it is a proper matter for the small merchandise ads due to its thickness is only below 3oo micoron, electricity consumption of ELD is less (1/3) than LED, ELD that is a whole face illumination system is much brighter than LED that is a dot illumination system, ELD is longer life than others due to its less light generation systems, ELD is any problems to bend, and it is a best device to use a light board ads. ELD has advantages on conservation of cave biosystems and reduce pollution when ELD is installed in touring spots and emergency corridors of weak illuminated cave internal areas by less heating and low electricity consumption using the indirect illumination of the ELD. Therefore when the high technologic ELD is installed in the commercial caves in Korea, it will be innovating cave environmental systems, saving budgets, and increasing tours.

• 대한설비공학회:학술대회논문집
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• 대한설비공학회 2008년도 동계학술발표대회 논문집
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• pp.15-20
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• 2008

The objectives of this study are to analyze the energy independence plan and to propose a suitable sewage treatment plant in Korea. The total amount of electricity consumption for public sewage treatment plant was estimated as 1,182 GWh in 2007. It was estimated that total 16 sewage treatment plants with renewable energy systems produced electricity of 15.2 GWh per year, which could replaced 0.8% of total electricity used for sewage treatment. It was found that domestic sewage treatment plants with power generation plants by digestion gas were installed in 7 places and produced electricity of 13 GWh per year. It was also found that the power generation plants by digestion gas were the most cost-effective for sewage treatment out of the renewable energy systems based on the benefit-cost analysis.