• 한국항행학회논문지
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• 제16권4호
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• pp.679-686
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• 2012

스마트그리드 시스템 보안에 대한 관심이 증가하면서 스마트그리스 시스템 내부 통신보안에 대한 연구가 활발히 진행되고 있다. 이러한 연구중에서도 스마트그리드 키관리 시스템에 대한 연구가 활발히 진행되고 있으나 지금까지 제안된 키관리 시스템은 스마트그리드 환경 상에서의 가용성 및 사용되는 디바이스의 정보보안에 대하여 취약하다. 본 논문에서는 AMI 환경에서 공개키 암호알고리즘과 해쉬함수를 사용하여, 사용되는 키의 수를 줄이고 디바이스의 보안성을 향상시키는 스마트그리드 환경에 적합한 키관리 메커니즘을 제안한다.

• 한국태양에너지학회 논문집
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• 제33권2호
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• pp.101-107
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• 2013

It is evident that in the wind energy business as an economic activity there is a close relationship between the wind speed and the revenues. The wind turbine test facility for wind turbine accreditation is intended to be used by the industry for testing of both main components and systems. This paper suggest the wind test site for certification of prototype wind turbine with international regulations. The test site has an environmental permit for wind turbines with a maximum hub height of 120m and a rotor diameter up to 120m, and can accommodate prototypes with installed electrical powers up to 5MW each. A wind turbine manufacturer can lease the location for a period of type certification. And also researchers are the development of new methods for measuring the influence, performance and durability of the components, a mathematical and numerical modelling of component responses by using the site.

• 한국태양에너지학회 논문집
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• 제33권6호
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• pp.70-76
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• 2013

Recently industrial control systems have been required to ensure intelligent, high tech automation, interconnection and interoperability demands. Therefore, there is a need to redefine the structure concepts of SCADA system for wind power. Also, at this time, the integrated management system is required for the distributed development of wind farms where are needed often interoperability features and exchange information between different wind farms, wind turbines or SCADA systems. In this paper, an integrated structural concepts for SCADA system are defined. Based on this definition of an integrated SCADA system, the basic designs are analyzed on physical layer, system layer and application layer which are corresponded to wind turbine controller, the SCADA server and the SCADA client, and implement HMI. Between the implementation SCADA server and the client, their normal functions were verified at the small scale wind energy test facilities.

• 정보보호학회논문지
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• 제23권5호
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• pp.873-883
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• 2013

보안 위협 평가는 시스템의 잠재적인 취약성을 파악하고, 그 취약성 및 대응방안에 대해 객관적인 점수를 부여하는 기술이다. 스마트그리드는 구조적 특성으로 인해 기존의 보안 위협 평가를 적용하기에 무리가 따른다. 본 논문에서는 스마트그리드의 보안 위협 평가를 위해 AMI에 대해 네트워크 모델을 제안하고 공격 시나리오를 도출하였다. 그리고 MTTC scheme을 이용하여 제안 네트워크 모델 및 공격 시나리오에 대해 보안 위협 평가 수행이 가능함을 보였다.

• 한국태양에너지학회 논문집
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• 제34권2호
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• pp.8-15
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• 2014

The objective of this paper is to suggest a design topology of permanent magnet synchronous generator with 2,000kW capacities for wind turbine. The suggested topology is to provide 3 split magnet PMSG instead of single magnet, and performed an analysis of eddy current loss and iron loss for suggested type using ansoft maxwell commercial program. The simulation results of suggested magnet type show there duction of eddy current loss as 13.87kW with loadless conditions and23.48kW with rated conditions, but iron loss for rotor yoke show the in creasing trend as2.2kW with loadless conditions and 0.2kW with rated conditions. The suggested 3 split maget type is to identified as more useful for 2,000kW PMSG.

• 전기학회논문지
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• 제63권11호
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• pp.1575-1581
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• 2014

In this paper, eddy current loss, iron loss and heat transfer of PMSG with 2,000kW capacities were analyzed for wind turbine. The PMSG with 3 split magnet was analyzed using ansoft maxwell commercial program and, generator was tested by Back to Back converter with no load condition at laboratory. Rotor surface temperature was measured by Pt100 sensors for investigating heat transfer from rotor to atmosphere. The simulation results shows 27.4kW eddy current loss in no load condition and 50.2kW eddy current loss in rated load condition with 3 split magnet, and also shows 4.3kW iron loss in no load condition and 7.3kW iron loss rated load condition. The heat transfer coefficient of convection between rotor surface and atmosphere was investigated by $9.6W/m^2{\cdot}K$. Therefore the heat transfer from rotor to atmosphere was about 17kW(54%) and from rotor to air-gap was about 14.6kW(46%) in no load condition. It is identified that the cooling system for stator have to include the 46% of iron loss, and heat dissipation structure of rotor surface have to be suggested and designed for efficiency improvement of generator.

• 한국항행학회논문지
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• 제16권4호
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• pp.709-716
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• 2012

최근 기존의 단방향 전력 시스템을 개선하여 안정적인 전력공급, 효율적인 에너지 관리 등을 가능하게 하는 스마트그리드가 관심을 받고 있다. 전력선통신(PLC : Power Line Communication)기술을 활용한 스마트그리드 환경은 각 가정의 PLC 모듈에서 수집한 정보를 데이터전송장치(IRM : Integrated Regional Manager)에 전송하고, 다시 그 정보를 전력서버로 전송한다. 이러한 통신 과정에서는 기존의 IT환경에서 발생하는 보안위협을 포함한 소비자의 개인정보유출, 전력망 마비 등의 다양한 문제가 발생할 수 있다. 그러므로 본 논문에서는 전력사용량 정보 전송과정에서 발생할 수 있는 보안위협에 대응하기 위해 ID 기반 키 분배 기법을 활용한 전력사용량 정보 전송 프로토콜을 제안한다.

• 한국태양에너지학회 논문집
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• 제34권2호
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• pp.60-65
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• 2014

A meteorological(met) tower is the first structure installed during the planning stages of offshore wind farm. The purpose of this paper is to design the met tower with tripod bucket type support structure and to install the sensors. The support structure consist of a central steel shaft connected to three cylindrical steel suction buckets which is more cheaper than monopile or jacket type. And the remote wind condition sensors and marine monitoring equipment, including adcp, pressure type tide gauge, wave height sensors, and scour sensors, remote power supply are installed. The manufactured met tower constructed on sea area which is in front of Gasa island. All of functions of met tower showed normal operation conditions and the wind data got by remote data collection system successfully.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2015년도 제46회 하계학술대회
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• pp.26-27
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• 2015

본 연구에서는 다수용가형 집합건물, 공장형 아파트 및 빌딩에 적합한 다채널 전력계량시스템(MCMS:Multi Customer Metering System)의 성능평가방법 및 현장실증의 결과를 제시하고, 핵심 요소인 mA CT의 성능평가방법 및 표준현황 연구를 통해 향후 MCMS 국내 도입을 위한 시험인프라 구축 및 관련 제품의 적합성을 제시하고자 한다.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2011년도 제42회 하계학술대회
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• pp.178-179
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• 2011

The exchange of information with legacy systems is a main issue in the era of SMARTGRID. Because WAMAC(Wide Area Monitoring and Control) system has monitoring function, as well as control function, it is very necessary for WAMAC to exchange data and information with SCADA(Supervisory Control and Data Acquisition) / EMS(Energy Management System). IEC 61970 CIM(Common Information Model) is an abstract model that represents all the major objects in an electric utility enterprise typically involved in utility operations. In this paper, a proposal that adopting CIM to WAMAC model be submitted so that the integration of various legacy system and application for itself be able to be flexible.