• 한국안전학회지
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• 제31권3호
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• pp.34-41
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• 2016

The purpose of this paper is to conduct ETA on six items of ESS: the whole system, battery, BMS, PCS, ESS and cable. To achieve that, ESS work flow and its components are categorized. Based on performance, human, environmental, management, and safety, this paper drew initiation events (IE) and end states (ES). ETA is applied to the main functions of each item, and the end states that may occur in one initiation event are suggested. In addition, detailed classification was performed to induce various end states on the basis of the suggested initiation events ; loss of grid electricity of ESS, loss of battery electricity(DC) of battery, impairment of electric function of BMS, loss of grid electricity(AC) of PCS, loss of data of EMS, Mechanical damage of cable, event sequence analysis conducted on the basis of event trees. If the suggested IEs and ESs are applied on the basis of ESS event cases, it is expected to prevent the same kinds of accident and operate ESS safely.

• 전자통신동향분석
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• 제34권2호
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• pp.101-109
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• 2019

Electrical energy storage (EES) systems store generated electricity in energy storage devices such as batteries and discharge the stored energy when necessary. Individual subsystems of the EES system are being standardized independently; however, a holistic understanding of the whole system is necessary because the EES system is large and complex. IEC TC 120 has developed international standards of EES systems. In this paper, EES systems standards in IEC TC 120, including the planning and installation of EES systems, are presented. Further, ongoing standardization for the application of EES systems to backup power and emergency support is described.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2001년도 합동 추계학술대회 논문집 정보 및 제어부문
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• pp.61-64
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• 2001

The electric power load during the peak time in summer is strongly affected by cooling load. which decreases the preparation ratio of electricity and brings about the failure in the supply of electricity in the electric power system. The ice-storage system and heat pump system etc are used to settle this problem. In this study, the method of estimating temperature and humidity to forecast the cooling load of ice-storage system is suggested. And also the method of forecasting the cooling load using neural network is suggested. For the simulation, the cooling load is calculated using actual temperature and humidity. The forecast of the temperature, humidity and cooling load are simulated. As a result of the simulation, the forecasted data approached to the actual data.

• 한국기계가공학회지
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• 제11권4호
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• pp.1-6
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• 2012

This paper addresses the issue of Renewable Energy for Electricity Storage device is one of the NAS (Sodium-Sulfur) battery will be about the module. For safety reasons, not the actual battery cells using a dummy cell in the module's operating temperature setting to examine the characteristics of the insulation vacuum of the wall temperature and external temperature changes measured over time. Upper and lower boundaries of the wall vacuum insulation characteristics cotton C intervals over time, average $5^{\circ}C$, but the temperature is rising, 4C section with little temperature change did not occur. On the other hand, about $3^{\circ}C$ in section 4D, and it was confirmed that the temperature rises. Wall vacuum insulation characteristics over time to look at the experiments and measurements are described.

• 전력전자학회:학술대회논문집
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• 전력전자학회 2006년도 전력전자학술대회 논문집
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• pp.462-464
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• 2006

본 연구는 제4세대 미터링(Metering) 기술을 이용한 전력전자상거래 즉 VSEM(Value Storage Electricity Meter)을 위한 웹기반 미터링 시스템의 보안성 분석 및 평가에 관한 연구이다. 특히 수요자 측면에서 스마트카드(지불결제)를 이용한 본인 확인(SIM카드), 키 값 확인, VSEM서버에서의 각 수요자와 공급자 데이터 사이의 무결성 확인(Integrity)과 부인 방지(Non-repudiation)를 위한 기존 시스템의 보안 문제를 분석하고 이를 해결할 수 있는 보안 모델을 제안한다.

• 전기학회논문지
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• 제63권1호
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• pp.191-196
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• 2014

For the large scale of electricity consumer, since the price for the electricity consumption depends on the peak power, the issue for peak power reduction have been being studied widely. Electric railway systems, which is one of the most representative large scale of loads, also has assignment to reduce the peak power since they have high peak power and low energy consumption load characteristics. In the aspect of the economic operation through reduction of peak power, this paper proposes a novel algorithm for power management system in electric railway systems using energy storage.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2007년도 제38회 하계학술대회
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• pp.856-857
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• 2007

For the sake of a stable power supply, an electric power company must have power generation facilities that can generate more electricity than the maximum demand of the year. Due to the fact that the maximum electricity demand will also continue to increase, enormous investments are needed annually to build power plants. For that reason, electric power companies are propelling 'Demand Side Management' which improve the form of electrical usage for the customer in a positive way. This paper presents the concept of 'Cool Storage System' which is the most representative program, which lowers the peak demand during the on-peak time periods in a day and creates a base load simultaneously during the night time hours among the DSM programs.

• 인터넷정보학회논문지
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• 제16권5호
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• pp.29-38
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• 2015

에너지 저장장치(Energy Storage System)은 전력 수요가 적을 때 전력을 저장해 두었다가 수요가 발생하거나 비상시 저장된 전력을 사용함으로 전기 에너지를 저장하여 필요할 때 사용 가능함으로써 에너지 이용 효율 향상, 전력공급 시스템 안정화 및 신재생 에너지 활용도 향상 효과를 가지는 시스템이다. 최근 세계적으로 에너지의 효율적인 소비에 대한 관심이 증대되면서 전력의 안정적인 공급을 원하는 수요자와 전력 수요 평준화를 원하는 공급자의 요구를 충족시켜줄 수 있는 에너지 저장장치의 필요성이 증대되고 있다. 현재 에너지 저장장치를 구성하는 Power Conditioning System(PCS), Battery Management System(BMS), 배터리 셀은 제조사별로 상이한 규격을 가진다. 이로 인해 각 핵심 부품 간 인터페이스가 규격화되어 있지 않아, 에너지 저장장치의 구성 및 운영에 난점으로 작용하고 있다. 본 논문에서는 제조사별로 상이한 특징을 가지는 부품들의 설정과 효율적 운영에 필요한 정보를 수용하여 에너지 저장장치를 구성할 수 있는 XML 기반의 에너지 시스템 전용 프로파일 시스템의 설계와 분석방안을 제안한다. 제조사별 PCS, BMS, 배터리 셀과 그 외의 주변 기기들의 설정 정보 및 운영 정보를 분석하여 프로파일 규격을 정의하고, 에너지 저장장치에 적용할 수 있는 프로파일 어댑터 소프트웨어를 설계 및 구현한다. 프로파일 어댑터를 통해 생성된 프로파일은 설정 프로파일과 운영 프로파일로 구성되며, 추후 확장성을 고려하여 표준 XML의 규격을 따른다. 구현된 프로파일 시스템의 검증은 에너지 저장장치 시스템에 적용되어 기본적인 충 방전 동작을 통해 정상 동작 결과를 제안한다.

• 대한설비공학회지:설비저널
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• 제18권6호
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• pp.491-497
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• 1989

• 전기학회논문지P
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• 제65권2호
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• pp.94-100
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• 2016

A virtual power plant (VPP) technology is a cluster of distributed generation installations. VPP system is that integrates several types of distributed generation sources, so as to give a reliable overall power supply. Virtual power plant systems play a key role in the smart grids concept and the move towards alternative sources of energy. They ensure improved integration of the renewable energy generation into the grids and the electricity market. VPPs not only deal with the supply side, but also help manage demand and ensure reliability of grid functions through demand response (DR) and other load shifting approaches in real time. In this paper, utilizing a variety of distributed generation resources(such as emergency generator, commercial generator, energy storage device), activation scheme of the virtual power plant technology. In addition, through the analysis of the domestic electricity market, it describes a scheme that can be a virtual power plant to participate in electricity market. It attempts to derive the policy support recommendation in order to obtain the basics to the prepared in position of power generation companies for the commercialization of virtual power plant.