• 한국에너지공학회:학술대회논문집
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• 한국에너지공학회 2008년도 춘계학술 발표회
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• pp.211-216
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• 2008

• 한국에너지공학회:학술대회논문집
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• 한국에너지공학회 2007년도 추계학술 발표회
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• pp.257-262
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• 2007

• KEPCO Journal on Electric Power and Energy
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• 제6권3호
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• pp.279-284
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• 2020

This paper presents the conceptual design of a cooperative control with Energy Management System (EMS) and Distribution Management System (DMS). This control enables insufficient reactive power reserve in a power transmission system to be supplemented by surplus reactive power in a power distribution system on the basis of the amount of the needed reactive power reserve calculated by the EMS. This can be achieved, because increased numbers of microgrids with distributed energy resources will be installed in the distribution system. Furthermore, the DMS with smart control strategy by using surplus reactive power in the distribution system of the area has been gradually installed in the system as well. Therefore, a kind of hierarchical voltage control and cooperative control scheme could be considered for the effective use of energy resources. A quantitative index to evaluate the current reactive power reserve of the transmission system is also required. In the paper, the algorithm for the whole cooperative control system, including Area-Q Indicator (AQI) as the index for the current reactive power reserve of a voltage control area, is devised and presented. Finally, the performance of the proposed system is proven by several simulation studies.

• 한국초전도학회:학술대회논문집
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• 한국초전도학회 2003년도 High Temperature Superconductivity Vol.XIII
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• pp.18-18
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• 2003

• 한국에너지공학회:학술대회논문집
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• 한국에너지공학회 2007년도 추계학술 발표회
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• pp.212-215
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• 2007

• 대한전기학회:학술대회논문집
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• 대한전기학회 2003년도 하계학술대회 논문집 A
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• pp.627-629
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• 2003

직접부하제어사업은 전력산업구조개편에 따라 발생할 수 있는 공급자원의 불확실성에 대비한 강력한 수요관리프로그램 중의 하나로 정부에서 중점 추진중인 사업이다. 이미 선진국에서도 다양한 메커니즘에 의해 Demand Response Program과 같은 부하관리프로그램을 운영하여 전력수급 및 전력요금 안정화를 꾀하고 있다. 우리나라의 경우 2001년도부터 동사업이 시행되고 있으며, 이에 주관기관으로서 에너지관리공단에서 추진하고 있는 직접부하제어를 위한 시스템 구성 및 운용방안에 대해 언급하고자 한다. 직접부하제어시스템은 크게 2단계로 구분되어지며, 상위시스템은 에너지관리공단에 설치 운영 중인 "전력부하관리센터(LMC)"와 민간 참여에 의해 운영 예정에 있는 "부하관리사업자시스템 (LSES)"으로 구성되며, 하위시스템은 "수용가용 직접부하제어시스템"으로 구성된다. 이에 본 연구에서는 직접부하제어시스템의 제어명령 체계 및 계량/정산을 위한 데이터처리방식 둥을 제시하여 본 시스템의 유용성 및 발전방향을 도출하고자 한다.

• 한국에너지공학회:학술대회논문집
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• 한국에너지공학회 2008년도 춘계학술 발표회
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• pp.187-192
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• 2008

• 대한전기학회:학술대회논문집
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• 대한전기학회 2009년도 제40회 하계학술대회
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• pp.1146_1147
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• 2009

This experiment is significant because we can provide information by measuring effect of energy saving for whom plan to install a geothermal heat & cooling system. The result shows geothemal system can save about 50% of energy(heating : 35%, cooling : 60%) and we verified that when using curtain can help saving 4~12% of energy additionally.

• KEPCO Journal on Electric Power and Energy
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• 제2권3호
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• pp.377-382
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• 2016

In 2013, a total capacity of 591.3 MW of installed wind power generation was achieved in Korea, with a total of 1,139 MWh of wind energy generated that year. More wind power plants will be installed in the coming years, and it is important to develop methods to reduce the output variability of these resources so as to provide stable power to the power grid of Korea. In this regard, this paper proposes the use of energy storage system (ESS) as a means to stabilize the output variability of wind power plants. Presented in this paper is a method that uses Discrete Fourier Transform (DFT) to determine the ESS capacity needed to provide a stable power output for ancillary services such as frequency regulation, economic dispatch, and emergency reserves. In the first step of the proposed method, four regions (namely, Samdal, Yeongdeok, Yeongyang, and Gangwon) in Korea that had the most wind power generation capacity were selected for analysis. In the second step, the individual and aggregated wind power outputs of the selected regions in 2013 were obtained This information was then used in the third step, where DFT analysis of the power outputs was used to drive the magnitudes of the output variation. And finally, the ESS capacity requirements needed to provide different ancillary services were determined based on the magnitudes of the output variation.

• 전력전자학회:학술대회논문집
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• 전력전자학회 2012년도 전력전자학술대회 논문집
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• pp.107-108
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• 2012

본 논문은 당사에서 개발한 800kW Energy Storage System(ESS)의 실증 운전에 관한 내용이다. Battery, PCS(Power Conditioning System), EMS(Energy Management System)로 구성되는 ESS는 평활화, 정출력 제어와 같은 다양한 운전모드의 실현으로 풍력, 태양광과 같은 신재생 에너지가 연계된 계통의 출력 안정화에 크게 기여한다. 본 논문은 Smart Renewable 국책과제로 진행된 800kW 에너지 저장 시스템의 실증운전 결과에 대해 중점적으로 기술하였다.