• Annual Conference of KIPS
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• 2006.05a
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• pp.545-548
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• 2006

전력선진국의 경우, 전력산업의 환경변화에 따라 시장의 주체가 공급자에서 수용가 중심으로 이동하는 변화를 겪고 있으며, 이는 소비자를 위한 IT(Information Technology) 기반의 부가서비스의 창출을 촉진시키고 있다. 이미 국외의 전력시장에는 다양한 형태의 부가서비스가 존재하고 있으며, 그 중 일부는 이미 수용가들이 이용하고 비용절감 효과를 입증한 사례도 있다. 이러한 부가서비스에 주로 이용되는 자원 중 하나가 원격검침 데이터이며, 원격검침 데이터는 요금 산출을 위한 사용량 정보 뿐만 아니라 수용가 영역에서 일어날 수 있는 다양한 이벤트를 분석할 수 있는 정보들을 포함하고 있기 때문에, 시간이 흐를수록 그 중요성을 더해가고 있다. 국내에서도 원격검침 데이터를 전략적 자산으로 인식하고 활용방안을 연구하여 국내 환경에 적합한 형태의 부가서비스를 소비자에게 제공할 필요가 있으며, 특히 소비자의 관여도가 높은 비용절감 측면의 서비스 개발이 중요하다. 이는 전력회사 입장에서도 비용 절감 및 효율적인 전력의 생산과 운영을 가능하게 한다. 본 논문에서는 소비자가 효율적이고 합리적으로 전력을 사용할 수 있게 하는 부가서비스로써 원격검침 데이터 기반의 전력 소비 컨설팅 시스템을 선정하고 이를 파일럿 시스템으로 구축한 내용을 소개하고자 한다.

• Proceedings of the KIEE Conference
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• 2006.07d
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• pp.2126-2127
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• 2006

전력산업에서의 전력부가서비스는 전력공급자 중심의 서비스에서 전력소비자 중심의 서비스로 패러다임 변화가 가속화되면서, 전력소비자의 수요패턴을 가장 잘 나타내고 있는 원격검침데이터를 활용한 서비스가 크게 부각되고 있으며, 그 활용 영역도 폭 넓게 적용되고 있다. 본 논문에서는 원격검침 데이터 기반 전력부가서비스 Pilot 시스템의 일종인 "전력소비 컨설팅 시스템(Power Consumption Consulting System)" 개발 사례를 소개한다. 본 시스템의 주요 기능은 데이터 분석, 에너지 분석, 비용 분석 등과 같이 3가지로 분류 할 수 있으며, 원격검침을 시행중인 고압고객 중 계약전력이 100kW 이상인 대수용가로부터 특히, 요금절감을 필요로 하지만 별도의 설비나 인력을 보유하지 않은 10,000kW 이하 고객을 적용대상으로 하고 있다.

• Proceedings of the KIEE Conference
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• 2005.07a
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• pp.789-791
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• 2005

국내의 원격검침 데이터는 주로 전력요금 산출용도에 활용되고 있다. 하지만 국외 전력회사들은 미래 디지털 사회의 기반이 되는 신 전력시스템을 구현하는데 필요한 핵심기술 중의 하나로서 IT(Information Technology)기반 전력부가서비스 기술의 중요성에 대해 강조하고 있으며, 이를 위해 원격검침 데이터를 기반으로 하는 다양한 전력부가서비스를 개발하여 적용하고 있다. 따라서, 국내의 경우도 원격검침 데이터를 단순한 전력요금 산출용도가 아닌 전력소비자와의 관계에서 부가가치를 높일 수 있는 무한한 잠재력을 지닌 전략적인 자산으로 보고, 원격검침 데이터 가공 및 활용기술의 선진화를 통하여 전력회사와 전력소비자 모두에게 필요한 전력부가서비스의 적용이 필요하다. 본 논문에서는 국내외 전력부가서비스 시스템의 비교 분석을 통해 국내 전력산업 환경에 적합한 새로운 전력 부가서비스 적용방향을 제시하고, 이를 기초로 설계한 전력부가서비스의 일종인 전력 에너지 컨설팅 서비스 시스템에 대해 소개하고자 한다. 설계한 전력부가서비스 시스템의 적용시 전력소비자 측면에서는 요금절감 효과가 전력회사 측면에서는 부하 수요관리 및 투자비 절감 효과가 예상된다.

• The KIPS Transactions:PartD
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• v.10D no.6
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• pp.1041-1048
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• 2003

This paper implements a remote image based metering(IBM) system which capture meter image, recognizes number automatically, and send the data wirelessly through PCS data network. We use existing gas/water meter and get NTSC camera image by installing small monochrome CMOS camera on the meter closely. For remote data transfer, we use SMS (short message service) that is provided by commercial PCS network. We developed DVR(digital video recorder) for capturing meter image and character recognition algorithm. In addition, hardware and software for SMS and meter selector were developed.

• The KIPS Transactions:PartC
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• v.18C no.6
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• pp.397-404
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• 2011

Recently the existing one-way electricity system that combines information and communications technology to develop smart grid technology is made active. The core infrastructure of the smart grid, AMI smart meters to AMR system, the amount of power measured at the top to MDMS transmits data store. Smart meters utilizing information and communication technology to transfer data and power because of the existing security threats are expected, including the additional security threats. It exposes the privacy of consumers and industrial systems, such as paralysis is likely to result in the loss. In this paper to respond to these security threats in the environment smart grid. Also, We propose data transfer methods between smartmeter and MDMS and between home device and MDMS.

• Journal of Korea Multimedia Society
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• v.19 no.2
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• pp.155-162
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• 2016

Several distributed scheduling policies have been proposed with the objective of attaining the maximum throughput region or a guaranteed fraction throughput region. These policies consider only the theoretical throughput and do not account the lost in throughput due to the time complexity of implementing an algorithm in practice. Therefore, we propose a novel concept called effective throughput to characterize the actual throughput by taking into account the time complexity. Effective throughput can be viewed as the actual transmitted data without including the control message overhead. Numerical results demonstrate that in practical scheduling, time complexity significantly affects throughput. The performance of throughput degrades when the time complexity is high.

• Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference
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• 2009.10a
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• pp.383-386
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• 2009

Contract power conversion factor which is applied to estimate contract power of industrial customers is an important standard to calculate transformer capacity. This paper shows a reasonable contract power conversion factor, that was made by the systematic and statistical way considering actual conditions, such as investigated contract power and peak power for the last 5 years of each customer for industrial customers as to AMR system. In this dissertation, it is necessary to analyze the key features and general trend from the investigated data. It made an analysis of the feature parameters, such as average, standard deviation, median, maximum. minimum and thus it was carried the linear and nonlinear regression analysis. Therefore, this paper compared characteristics for a contract power conversion factor which is applied to calculate contract power with characteristics for a regression model for customers which maximum utilization factor of transformer is more than 60%.

• Advances in materials Research
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• v.8 no.4
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• pp.259-274
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• 2019

Flexoelectric effect has a major role on mechanical responses of piezoelectric materials when their dimensions become submicron. Applying differential quadrature (DQ) method, the present article studies dynamic characteristics of a small scale beam made of piezoelectric material considering flexoelectric effect. In order to capture scale-dependency of such piezoelectric beams, nonlocal elasticity theory is utilized and also surface effects are included for better structural modeling. Governing equations have been derived by utilizing Hamilton's rule with the assumption that the scale-dependent beam is subjected to thermal environment leading to uniform temperature variation across the thickness. Obtained results based on DQ method are in good agreement with previous data on pizo-flexoelectric beams. Finally, it would be indicated that dynamic response characteristics and vibration frequencies of the nano-size beam depends on the existence of flexoelectric influence and the magnitude of scale factors.

• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.27 no.12
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• pp.141-145
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• 2013

This paper shows a reasonable demand power, that was made by the systematic and statistical way considering actual conditions, such as investigated contract power and peak power for the last 7 years of each tunnel customer as to AMR. In this dissertation, it is necessary to analyze the key features and general trend from the investigated data. It made an analysis of the feature parameters, such as average, standard deviation, median, maximum, minimun and thus it was carried by the linear and nonlinear regression analysis.

• Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference
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• 2008.05a
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• pp.293-296
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• 2008

Contract power conversion factor which is applied to estimate contract power of general customers IS an important standard to caculate transformer capacity. This paper shows a reasonable contract power conversion factor, that was made by the systematic and statistical way considering actual conditions, such as investigated contract power and peak power for the last 5 years of each customer for 132 office building customers as to AMR system. In this dissertation, it is necessary to analyze the key features and general trend from the investigated data. It made an analysis of the feature parameters, such as average, standard deviation, median, maximum, minimun and thus it was carried the linear and nonlinear regression analysis. Therefore, this paper compared characteristics for a contract power conversion factor which is applied to calculate contract power with characteristics for a regression model for customers which maximum utilization factor of transformer is more than 60%.