• The Journal of Korean Institute of Communications and Information Sciences
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• v.42 no.4
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• pp.904-914
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• 2017

For efficient energy usage, the concept of demand response has been emerged and thereby Open Automated D emand Response(OpenADR) protocol is developed as a standard protocol to provide automated demand response. There have been emerging trends on the demand response services using the Internet of Things(IoT) for smart h ome energy management. In this smart home energy IoT environment, a lightweight protocol is needed rather tha n the existing HTTP/ XML based OpenADR protocol for demand response services since many small devices wi ll be interconnected. In this paper, we propose a lightweight OpenADR protocol based on CoAP protocol for pro viding demand response service in Smart Energy IoT environment, implement the proposed CoAP-based protocol, and analyzed the performance compared to existing HTTP/ XML-based OpenADR 2.0b protocol.

• The Journal of Society for e-Business Studies
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• v.17 no.2
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• pp.105-114
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• 2012

Recently, global warming, energy shortage, and environmental disruption have been serious problems in every nation. It became more and more important to reduce the emission of CO2 and to use of energy efficiently. Smart grid was also introduced using the rapidly developing information technology. It deployed the mutual communication concept between customers and the suppliers in the electricity supply. There were increasing demands to adopt the smart meter and to present incentive for efficient energy usage in many developed countries. The objective of this research was to develop the optimal real time pricing model which maximized the profit of the power retailer and reduced the usage of energy. The simulation study was given to show the usefulness of the model. Simulation considered the customer demand response rate and price elasticity rate. The price elasticity rate was compared in the condition of fixed value according to time and variable value according to the customers. The optimal price model could maximize the profit of the power retailer and reduce the energy usage of the consumers.

• Journal of the Society of Disaster Information
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• v.20 no.1
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• pp.117-127
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• 2024

Purpose: The purpose is to conduct basic research to save energy and improve the safety of manufacturing plant infrastructure by comprehensively monitoring energy management, temperature, humidity, dust and gas, air quality, and machine operation status in small and medium-sized manufacturing plants. Method: To this end, energy-related data and environmental information were collected in real time through digital power meters and IoT sensors, and research was conducted to disseminate and respond to situations for energy saving through monitoring and analysis based on the collected information. Result: We presented an application plan that takes into account energy management, cost reduction, and safety improvement, which are key indicators of ESG management activities. Conclusion: This study utilized various sensor devices and related devices in a smart factory as a practical case study in a company. Based on the information collected through research, a basic system for energy saving and safety improvement was presented.

• Smart Media Journal
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• v.9 no.1
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• pp.84-91
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• 2020

Along with increasing the renewable energy utilization, many researches have paid attention on the utilization and efficiency of energy storage systems. Especially, it is required an operational model in order to actively respond with each system's failure of sub-systems in the solar energy storage system. This paper proposes an energy management scheme by estimating the newly generated power based on the solar power generation samples. With comparing the estimated battery charging power in real time and the total charging power of the battery rack, a charge model is applied to adjust the charging power, As a result, the stability of energy storage system would be improved by suppressing the battery heat while maintaining battery C-Rate.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2011.10a
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• pp.835-838
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• 2011

This paper presented an occupancy-based smart plug system for appliance energy saving in home. We measured current consumption of appliances in real time using smart plugs, and check the occupation of residents using occupancy sensors installed on the door. The proposed system saves energy to switch off the supply power of unnecessary usages in the unoccupied spaces. Experiments conducted have shown that current usage of appliances can be measured by using smart plugs and presence can be checked by using occupancy sensors.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2021.05a
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• pp.626-629
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• 2021

Recent home appliances requires convenience and low-power consumption. A convenient devices should be simple to control while having several functions. Intelligent sensors and utilization technologies are required to reduce energy consumption. This paper provides a smart drying system with Bluetooth communication function and energy reduction function. Design a control system that uses the Bluetooth function so that the smartphone monitors the drying control and the internal humidity condition. By detecting the humidity inside the dryer and controlling the speed of the motor, it has an energy-saving function.

• Proceedings of the KAIS Fall Conference
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• 2010.11a
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• pp.147-150
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• 2010

현재 우리나라 제주도에서 스마트 그리드 실증단지를 만들어 한국형 스마트 그리드의 효용성과 실효성을 검증하려고 하고 있다. 이는 우리나라에 적합한 스마트 그리드 시스템을 실행하기 위한 범 정부 차원의 프로젝트다. 또한 다른 국가들도 자국의 정치, 경제, 기술, 기타 환경에 맞는 최적의 스마트 그리드 시스템을 찾기 위해서 구상하고 실행에 옮기고 있다. 따라서 다른 국가의 스마트 그리드 동향을 알아봄으로써 우리나라가 스마트 그리드의 국제 표준화 선점 및 핵심기술 확보 등을 통한 신 비즈니스 모델을 창출할 수 있고, 최적의 스마트 그리드 시스템을 찾아 궁극적으로는 전기 에너지의 고효율화 사용으로 온실가스를 감축 할 수 있다. 이러한 이유로 본 논문에서는 국내 스마트 그리드의 동향 및 미국, 일본, 중국, 유럽등의 스마트 그리드 동향에 대해서 분석하였다.

• Journal of Energy Engineering
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• v.24 no.1
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• pp.123-131
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• 2015

This paper aims to identify and clarify the cyber security risks and their interaction with the power system in Smart Grid. The EMS and other communication networks interact with the power system on a real time basis, so it is important to understand the interaction between two layers to protect the power system from potential cyber threats. In this study, the optimal power flow(OPF) and Power Flow Tracing are used to assess the interaction between the EMS and the power system. Through OPF and Power Flow Tracing based analysis, the physical and economic impacts from potential cyber threats are assessed, and thereby the quantitative risks are measured in a monetary unit.

• Proceedings of the KIPE Conference
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• 2016.07a
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• pp.22-23
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• 2016

전력계통에서의 신재생에너지 발전원 수용한계를 극복하기 위하여 계통 운영자들은 신재생에너지원이 전력계통에 연계될 때 필수적으로 지켜야할 규정을 강화하는 방향으로 법규를 개정하고 있다. 미국 캘리포니아주는 전력계통연계 규정인 Rule21을 개정하여 UL1742 SA에 적용 예정이다. 국내 한국전력공사는 2016년 4월 8일부로 '분산형전원 능동전압제어 기능적용 인버터 시험절차 개선'을 마련하고, 국내 공인인증기관에서 시험성적서 발급 중에 있다. 본 논문에서는 국내외 분산형 전원용 스마트 인버터의 기능과 규정을 소개하고자 한다.

• Proceedings of the KIPE Conference
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• 2011.07a
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• pp.322-323
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• 2011

본 논문의 주제는 20kW급 에너지저장장치의 개발과 그 구조를 소개하는 것이다. '세화 요양원'에 설치하는 20kW급 ESS의 용량 선정에 대한 소개, 스마트 그린 타운의 정의와 그 구조에 대한 내용을 다룰 것이다. 시뮬레이션 결과와 실험 결과를 바탕으로 ESS의 가능성 또한 살핀다.