• Title/Summary/Keyword: Long-Term Expansion Planning

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A Study on Impact of Generator Maintenance Outage Modeling on Long-term Capacity Expansion Planning (발전기 계획예방정비 모델링 방식이 전원계획 수립에 미치는 영향에 관한 연구)

  • Kim, Hyoungtae;Lee, Sungwoo;Kim, Wook
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.67 no.4
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    • pp.505-511
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    • 2018
  • Long term capacity expansion planning has to be carried out to satisfy pre-defined system reliability criterion. For purpose of assessing system reliability, probabilistic simulation technique has been widely adopted. However, the way how to approximate generator outage, especially maintenance outage, in probabilistic simulation scheme can significantly influence on reliability assessment. Therefore, in this paper, 3 different maintenance approximation methods are applied to investigate the quantitative impact of maintenance approximation method on long term capacity expansion planning.

Agent-Based Modeling for Studying the Impact of Capacity Mechanisms on Generation Expansion in Liberalized Electricity Market

  • Dahlan, N.Y.
    • Journal of Electrical Engineering and Technology
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    • v.10 no.4
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    • pp.1460-1470
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    • 2015
  • This paper presents an approach to solve the long-term generation expansion planning problem of the restructured electricity industry using an agent-based environment. The proposed model simulates the generation investment decisions taken by a particular agent (i.e. a generating company) in a market environment taking into account its competitors’ strategic investment. The investment decision of a particular company is modeled taking into account that such company has imperfect foresight on the future system development hence electricity prices. The delay in the construction of new plants is also explicitly modeled, in order to compute accurately the yearly revenues of each agent. On top of a conventional energy market, several capacity incentive mechanisms including capacity payment and capacity market are simulated, so as to assess their impact on the investment promotion for generation expansion. Results provide insight on the investment cycles as well as dynamic system behavior of long-term generation expansion planning in a competitive electricity industry.

RELIABLE ROLE OF NUCLEAR POWER GENERATION UNDER CO2 EMISSION CONSTRAINTS

  • Lee, Young-Eal;Jung, Young-Beom
    • Nuclear Engineering and Technology
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    • v.39 no.5
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    • pp.655-662
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    • 2007
  • Most decision makers in the electricity industry plan their electric power expansion program by considering only a least cost operation, even when circumstances change with differing complexities. It is necessary, however, to analyze a long-term power expansion plan from various points of view, such as environmental friendliness, benefit of a carbon reduction, and system reliability, as well as least cost operation. The objective and approach of this study is to analyze the proper role of nuclear power in a long-term expansion plan by comparing different scenarios in terms of the system cost changes, $CO_2$ emission reduction, and system reliability in relation to the Business-As-Usual (BAU). The conclusion of this paper makes it clear that the Korean government cannot but expand the nationwide nuclear power program, because an increased energy demand is inevitable and other energy resources will not provide an adequate solution from an economic and sustainability point of view. The results of this analysis will help the Korean government in its long-term resource planning of what kinds of role each electric resource can play in terms of a triangular dilemma involving economics, environmental friendliness, and a stable supply of electricity.

Optimal Generation Planning Including Pumped-Storage Plant Based on Analytic Cost Function and Maximum Principle (해석적 비용함수와 최대원리리에 의한 양수운전을 포함하는 최적전원계획)

  • 박영문;이봉용
    • The Transactions of the Korean Institute of Electrical Engineers
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    • v.34 no.8
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    • pp.308-316
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    • 1985
  • This paper proposes an analytic tool for long-term generation expansion planning based on the maximum principle. Many research works have been performed in the field of generation expansion planning. But few works can be found with the maxinmum principle. A recently published one worked by professor Young Moon Park et al. shows remarkable improvements in modeling and computation. But this modeling allows only thermal units. This paper has extended Professor Park's model so that the optimal pumped-storage operation is taken into account. So the ability for practical application is enhanced. In addition, the analytic supply-shortage cost function is included. The maximum principle is solved by gradient search due to its simplicity. Every iteration is treated as if mathematical programming such that all controls from the initial to the terminal time are manipulated within the same plane. Proposed methodology is tested in a real scale power system and the simulation results are compared with other available package. Capability of proposed method is fully demonstrated. It is expected that the proposed method can be served as a powerful analytic tool for long-term generation expansion planning.

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A Study of Long-Term Generation Expansion Planning Using Nonlinear Invest Cost Function (비선형 투자비 함수를 이용한 장기 전원개발계획 수립에 관한 연구)

  • Kim, Joon-Hyun;Choi, In-Hong
    • Proceedings of the KIEE Conference
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    • 1988.11a
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    • pp.102-106
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    • 1988
  • Generally, average invest cost is widely used for expansion planning of generation in power system. But, other cost which is followed by adding generating capacity in electric system is increased in accordance with increasing plant reasons. In this study, we represent the invest cost with quadratic function and analyze its effect on the expansion planning. It is hoped that this method is used in expansion planning of generating system.

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A Case Study on Farmers' Participation in Farmland Bank : Focusing on Long-term Leasing Business of Farmland in Gangwon Province (참여농가 사례분석을 통한 농지장기임대차사업 개선방안에 관한 연구 : 강원도를 중심으로)

  • Yi, Hyangmi;Kim, Mi Young
    • Journal of Korean Society of Rural Planning
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    • v.20 no.3
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    • pp.55-66
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    • 2014
  • Under high agricultural automation in rice farming, cultivation acreage expansion can be considered for the economies of scale. Also, considering the circumstances of higher ratio in leased farms than independent farms, Long-term Leasing Business of Farmland can be the most public and transparent method to expand cultivation acreage for lease farming. Therefore, this research observes the various factors such as application motives, satisfaction, and demands of Long-term Leasing Business of Farmland, which the importance is on the rise and serves as a means to increase agricultural expansion, as well as its operational performance analysis. The research results and implications are as follows. Long-term Leasing Business of Farmland have positive effects such as ensuring stable farming through documental contract, providing convenience because the lease contractor requires no meetings during the contract period, providing opportunities to expand the farm size, and acquiring economical gain which is linked to satisfaction aspects of the businesses. On the other hand, demands such as strengthened business advertisement, writing business documents by correlating with related organizations, and clear lease price configuration were made by the businesses. To bring improvements, this research proposes; 1) expanding support to related businesses, 2) providing convenience through related organization correlations, and 3) configuring clear lease prices considering the regional conditions.

Consideration of Ambiguties on Transmission System Expansion Planning using Fuzzy Set Theory (애매성을 고려한 퍼지이론을 이용한 송전망확충계획에 관한 연구)

  • Tran, T.;Kim, H.;Choi, J.
    • Proceedings of the KIEE Conference
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    • 2004.11b
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    • pp.261-265
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    • 2004
  • This paper proposes a fuzzy dual method for analyzing long-term transmission system expansion planning problem considering ambiguities of the power system using fuzzy lineal programming. Transmission expansion planning problem can be formulated integer programming or linear programming with minimization total cost subject to reliability (load balance). A long-term expansion planning problem of a grid is very complex, which have uncertainties fur budget, reliability criteria and construction time. Too much computation time is asked for actual system. Fuzzy set theory can be used efficiently in order to consider ambiguity of the investment budget (economics) for constructing the new transmission lines and the delivery marginal rate (reliability criteria) of the system in this paper. This paper presents formulation of fuzzy dual method as first step for developing a fuzzy Ford-Fulkerson algorithm in future and demonstrates sample study. In application study, firstly, a case study using fuzzy integer programming with branch and bound method is presented for practical system. Secondly, the other case study with crisp Ford Fulkerson is presented.

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A Study on the LOLP Sensitivity Analysis for Determination of Reliability Criteria in Generation Expansion Planning (전원개발계획 공급신뢰도 기준 설정을 위한 LOLP 민감도 분석)

  • Chung, Do-Young;Kim, Kwang-In;Lee, Sang-Chul;Park, Jong-Bae
    • Proceedings of the KIEE Conference
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    • 1995.07b
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    • pp.543-545
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    • 1995
  • The purpose of this paper is to determine the proper reliability criteria used in generation expansion planning of electric utilities. In this paper, we tried to combine long-term generation expansion planning and short-term weekly maintenance scheduling program package. We set two scenarios in which the O&M technology of power plants will be improved or not in the future. We performed LOLP sensitivity analysis for each scenario to determine the optimum reliability criteria in the power system operation aspects.

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A Study on a Generation and Transmission Planning Considering CO2 Emission Constraint and Emission Trading (CO2 배출량 제약과 배출권거래제를 고려한 설비계획 방법론 개발에 관한 연구)

  • Kim, Yang-Il;Chung, Koo-Hyung;Han, Sock-Man;Kim, Bal-Ho
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.56 no.3
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    • pp.481-490
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    • 2007
  • WASP which is used to plan generation expansion has disadvantages that can't manage environmental factors and regional supply-demand planning. But with the effectuation of the United Nations Framework Convention on Climate Change (UNFCCC) and Kyoto Protocol, it is expected that reducing greenhouse gases affects power system in its long-term generation expansion planning. Therefore national countermeasures is needed. This paper formulates a mathematical model considering CO2 emission constraints and Emission Trading that will be enforced. This model is based on the MEFISET (Model for Economic Feasibility of Interstate Electrical Ties) which was made by Korea Energy Economics Institute and Hong-ik university and manages generation expansion planning. And this mathematical model is verified by studying a case system.

A Study on Optimal Reliability Criterion Determination for Transmission System Expansion Planning

  • Tran Trungtinh;Choi Jae-Seok;Jeon Dong-Hoon;Chu Jin-Boo;Thomas Robert;Billinton Roy
    • KIEE International Transactions on Power Engineering
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    • v.5A no.1
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    • pp.62-69
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    • 2005
  • The optimal design of transmission system expansion planning is an important part of the overall planning task of electric power system under competitive electricity market environments. One of main keys of the successful grid expansion planning comes from optimal reliability level/criteria decision, which should be given for constraint in the optimal expansion problem. However, it's very difficult to decide logically the optimal reliability criteria of a transmission system as well as generation system expansion planning in a society. This paper approaches a methodology for deciding the optimal reliability criteria for an optimal transmission system expansion planning. A deterministic reliability criteria, BRR (Bus Reserve Rate) is used in this study. The optimal reliability criteria, BRR/sup */, is decided at minimum cost point of total cost curve which is the sum of the utility cost associated with construction cost and the customer outage cost associated with supply interruptions for load considering bus reserve rate at load buses in long term forecasting. The characteristics and effectiveness of this methodology are illustrated by the case study using IEEE-RTS.