• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 2001년도 가을 학술발표회 논문집
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• pp.681-686
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• 2001

The purpose of this study is to provide the optimum mix design of concrete to be placed at the face slab concrete in CFRD(Concrete Faced Rockfill Dam) for pumped storage power plants. The basic performance tests including compressive strength, modulus of elasticity, flexural strength and the control properties of crack including plastic shrinkage, drying shrinkage were conducted for concrete using fly ash and polypropylene fiber. From this study, the fly ash concrete represented the better results in the aspects of basic performance, control properties of crack and economy than ordinary portland cement concrete. Especially the concrete mix design containing 20% of fly ash is recommended to be applied in the construction of the face slab concrete in CFRD for pumped storage power plants.

• 대한전기학회논문지
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• 제40권6호
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• pp.551-561
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• 1991

The probabilistic generation simulation plays a key role in power system expansion and operational planning especially for the calculation of expected energy, loss of load probaility and unserved energy expected. However, it is crucial to develop a probabilistic generation simulation algorithm which gives sufficiently precise results within a reasonable computation time. In a previous paper, we have proposed an efficent method using Fast Hartley Transform in convolution process for considering the thermal and nuclear units. In this paper, a method considering the scheduling of pumped-storage plants and hydro plants with energy constraint is proposed. The method also adopts FHT techniques. We improve the model to include multi-state and multi-block generation. The method has been applied for a real size model system.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1989년도 추계학술대회 논문집 학회본부
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• pp.194-196
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• 1989

The production costing plays a key role in power system expansion and operations planning especially for the calculation of expected energy, loss of load probability and unserved energy. Therefore, it is crucial to develope a probabilistic production costing algorithm which gives sufficiently precise results within a reasonable computational time. In this respect, a number of methods of solving production simulation have been proposed. In previous paper we proposed the method used Fast Hartley Transform in convolution process with considering only the thermal units. In this paper, the method considering the scheduling of pumped-storage plants and hydro plants with energy constraints is proposed.

• 터널과지하공간
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• 제17권2호
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• pp.90-101
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• 2007

최근 지하공간개발의 증가와 한께 상부저수지에 저장된 물을 하부저수지고 낙하시켜 발전하는 지하양수 발전소의 건설도 지속적으로 이루어지고 있다. 이거한 지하양수발전소를 건설할 때, 구조물의 효율적이고 안전한 설계 시공 및 유지를 위해서 설계단계에서 암석과 암반의 공학적 특성 및 대상지역의 지압상태 등을 명확히 파악하는 것은 매우 중요하다. 본 논문에서 소개하는 양수발전소는 심포 $320{\sim}375m$에서 건설되고 있으며, 구조물의 안정성 검토를 위하여 굴착예정지 암반에 대해 오버코어링법을 이용한 초기응력측정, 공내재하시험 및 암석의 물성시험을 실시하여 설계에 필요한 기초자료를 획득하였다. 이를 바탕으로 수치해석을 실시하여 기존 지보재 설계의 적정성을 판단하였고, 불안정성으로 판정된 부분에 대해서는 추가로 보강설계를 하였다. 추가 보강설계 결과, 공동 전체에서 안정성을 확보하였고 현재 순조롭게 굴착이 이루어지고 있는 상태이다.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2005년도 추계학술대회 논문집 전력기술부문
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• pp.177-179
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• 2005

In Korean Power Market, Cost-based Bidding Pool is maintaining the present condition because restructuring of electricity industry is holding. When this market is designed, Settlement rules for Pumped-storage power plant made unfairly by other power plants. These rules were considered contribution of Pumped-storage power plant to network operation. by the way, there are some discussion about Settlement rules modification. so in this paper, we calculated financial effect of power plant by modified rules. And when we modify market rules, we can offer numerical information.

• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 1999년도 봄 학술발표회 논문집(I)
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• pp.619-624
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• 1999

The purpose of this study is to provide the optimum mix design of fly ash concrete to be placed at the concrete face rockfill dam for pumped storage power plats. The basic performance tests including compressive strength, modulus of elasticity, unit weight, coefficient of thermal expansion, shrinkage, adiabatic temperature rise and analysis of thermal stress were conducted for fly ash concrete. From this study, the fly ash concrete represented the better results in the aspects of basic performance and economy than ordinary portland cement concrete. Especially the concrete mix design containing 15% of fly ash is recommended to be applied in the construction of the concrete face rockfill dam for pumped storage power plants.

• Smart Structures and Systems
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• 제29권3호
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• pp.457-473
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• 2022

A high-frequency vibration control method is proposed in this paper for Pumped Storage Power Plants (PSPPs) using Eddy Current Tuned Mass Damper (EC-TMD), based on which a new type of EC-TMD device is designed. The eddy current damper parameters are optimized by numerical simulation. On this basis, physical simulation model tests are conducted to compare and study the effect of structural performance with and without damping, different control strategies, and different arrangement positions of TMD. The test results show that EC-TMD can effectively reduce the control effect under high-frequency vibration of the plant structure, and after the additional damping device forms EC-TMD, the energy dissipation is further realized due to the intervention of eddy current damping, and the control effect is subsequently improved. The Multi-Tuned Mass Damper (MTMD) control strategy broadens the tuning band to improve the robustness of the system, and the vibration advantage is more obvious. Also, some suggestions are made for the placement of the dampers to promote their application.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2005년도 제36회 하계학술대회 논문집 A
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• pp.149-151
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• 2005

A new approach considering CO2 air pollution constraints in the long-term generation mix is proposed under uncertain circumstances. A characteristic feature of the presented approach in this paper is what effects give the air pollution constraints in long term best generation mix. Best generation mix problem is formulated by linear programming with fuel and construction cost minimization with load growth, reliability (reserve margin rate) and air pollutionconstraints. The proposed method accommodates the operation of pumped-storage generator. It was assumed in this study that the construction planning of the hydro power plants is given separately from the other generation plans. The effectiveness of the proposed approach is demonstrated by applying to the best generation mix problem of KEPCO-system, which contains nuclear, coal, LNG, oil and pumped-storage hydro plant multi-years.

• 한국지리정보학회지
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• 제23권4호
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• pp.184-207
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• 2020

본 연구에서는 GIS기반 적지분석을 적용하여 조류-양수 융합발전시설의 설치후보지역을 도출하는 것을 목표로 하였다. 연구대상지역은 진도 일대 서남해 해역이며, 융합발전시설의 설계 및 설치 특성을 고려하여 적지분석을 위한 고려인자를 도출하였다. MOHID(Modelo HIDrodin?mico)를 이용하여 조류 수치모의를 수행하였고, 모의 결과를 공간자료로 변환하였다. 이후 본 연구에서는 제안하는 GIS기반 중첩분석 방법을 적용하여 설치후보지역을 도출하였다. 연구 결과에서 총 10개 지역이 후보지역으로 도출되었으며, 이 중 진도, 성남도, 하조도가 상대적으로 넓은 해역에 대해 조류-양수 발전기 설치가 가능한 것으로 판단되었다.

• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 2001년도 가을 학술발표회 논문집
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• pp.1017-1022
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• 2001

Dam concrete for pumped storage power plants should have sufficient durability in repetitive wet and dry conditions and abrasion due to water level fluctuation and also in freezing and thawing resistance as well as permeability capacity. This study presents various experimental results to enhance the durability of face slab concrete in CFRD(concrete faced rockfill dam) by varying the fly ash substitution such as 0%, 15%, 20% and 25% and polypropylene such as 0%, 0.1%. The effect on durability of concrete corresponding to the increasing amount of fly ash and polypropylene was evaluated and the optimum quantity of fly ash and polypropylene substitution was recommended. The results show that 20% of fly ash substitution and 0% of polypropylene were found out to be an optimum quantity to achieve excellent performances in durability for face slab concrete in CFRD.