• Title, Summary, Keyword: electricity industry

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Decomposition Analysis of Carbon Emission in Korea Electricity Industry : Utilizing the Logarithmic Mean Divisia Index Method to the Demand and the Supply Side (국내 전력산업의 탄소배출 변화요인 분석 : 로그평균디비지아지수를 이용한 수요와 공급 측면 분석)

  • Kim, Kyunam;Kim, Kangseok;Kim, Yeonbae
    • Environmental and Resource Economics Review
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    • v.19 no.2
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    • pp.243-282
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    • 2010
  • In this paper, we analyze the components and trends of carbon emissions using the Logarithmic Mean Divisia Index decomposition method in Korean electricity industry during the period 1991~2007. In the demand side, carbon emissions are affected by electricity intensity and structural shift and especially electricity intensity is identified as the major factor which has lead carbon emissions decreasing. In the supply side, the result in variations of carbon emission for electric power generation depends on the influences of fossil fuel mix, fuel intensity, generation mix and so on. As a result fuel intensity is the most negative effect on both carbon emission intensity and the amount of carbon emission while the change of generation mix has a positive effect on increasing carbon emissions. And to conclude it needs to make the strategic policies to improve electricity intensity in the demand and to rise emission efficiency as well as to substitute thermal power generation in supply side.

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A Study on Transaction Pricing of Generation Bidding in Electricity Market by Using Game Theory (게임이론을 이용한 전력시장 발전입찰에서의 거래가격 결정에 관한 연구)

  • 이광호
    • The Transactions of the Korean Institute of Electrical Engineers A
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    • v.52 no.6
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    • pp.333-339
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    • 2003
  • Competition among electric generation companies is a major goal of restructuring in the electricity industry. In electricity market, a huge volume of commodities will be traded through competitive bidding. The choice between uniform and pay-as-bid pricing for electricity auction has been one of most important issues in deregulated electricity market. This paper proposes a constrained Bertrand model for analyzing the electricity auction market of price competition model. The issue of the two pricing rules of uniform and pay-as-bid is studied from the viewpoint of consumer's benefit. This paper also shows that transmission congestion depends on the pricing mechanism. Pay-as-bid pricing gives less possibility of transmission congestion by price competition, and less burden to consumers in the simulation results.

A Study on the Improvement of Planning procedure and estimation of Capacity Addition in Long Term Electricity Plan (전력수급기본계획 수립에서 의향서 평가절차의 개천 방안)

  • Kim, C.S.;Rhee, C.H.
    • Proceedings of the KIEE Conference
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    • pp.745-747
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    • 2005
  • After restructuring electricity industry, national long term electricity plans moved to "Basic plan of electricity supply and demand" from "Long term power development plan". The main point is a change of path from plan of power development at national level to plan of electricity supply and demand at company level. A proposal by generation company is surveyed and reflected to the basic plan of electricity supply and demand. The second plan shows over 40% reserves in result of the proposals. It is the time to evaluating the proposal which covers market function in the basic plan of electricity supply and demand at the stage of market change. This research presents the need of evaluation of proposals and the methods of evaluation. Also it presents the alternative planning procedure to reflecting the evaluation methods.

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The Measurement of Efficiency Structure and Regulatory Effects in Korean Electric Industry with Power Development Plan (전원개발계획을 고려한 전력산업의 비용구조 및 규제효과분석)

  • Rhee, Chang-Ho;Kwun, Young-Han
    • Environmental and Resource Economics Review
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    • v.11 no.2
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    • pp.233-260
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    • 2002
  • This paper tries to analyze the efficiency structure and regulatory effects in electric power industry by using total factor productivity and indices based on cost function method. This paper performed an empirical analysis on the efficiency improvement and optimal scale taking the cost aspect in electricity industry into account. By expanding the cost structure framework, this paper proposes the analytical method regarding the needs of technology regulation and presents the empirical results which can be verified. Hence, this work can play a key role in decision-making of the national power development and regulatory policy. The empirical result indicates that the electricity industry in Korea has been in the state of economies of scale until 1980s, However, due to sustained growth of power generation, economies of scale declined and subsided after 1980s and then diseconomies of scale is shown recent years. The analysis on the effect of technology regulation shows the national large-scale base-load power plant development-oriented policy until so far contributed substantial cost effect to the electricity industry. The empirical result indicates that the reserve requirement as one of means of technology regulation policy did not contribute to the economies of scale but positive effect on the total factor productivity in Korea.

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A study on the role and Construction of Electric Power Statistics after Deregulation (구조개편후 전력분야 통계의 역할과 효율적 구축방향)

  • Kim, C.S.;Rhee, C.H.;Jo, I.S.
    • Proceedings of the KIEE Conference
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    • pp.667-669
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    • 2003
  • Since the restructuring in electricity industry, single utility company, KEPCO, was being unbundled horizontanly and vertically, which resulted in 6 generation companies. Hence, electricity statistics system leaded by KEPCO is no longer efficiently sustainable. By introduction of electricity market, the importance of statistical information is getting higher and higher. From now on, the leading role played in statistical system in electricity field should be switched from KEPCO to government. This paper looks into change in statistical work driven by electricity and provides alternatives applicable to new electricity market. In addition, this paper provides new standard form for the collection of statistical data and construction of statistical system.

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Elasticity of substitution of renewable energy for nuclear power: Evidence from the Korean electricity industry

  • Kim, Kwangil
    • Nuclear Engineering and Technology
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    • v.51 no.6
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    • pp.1689-1695
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    • 2019
  • This study suggests a simple economic model to analyze electricity grid that consists of different power sources. The substitutability of renewable energy for nuclear power in Korean electricity transmission network is investigated by suggested model. The monthly data from January 2006 to December 2013 reported by Electricity Power Statistics Information System (EPSIS) of Korea Power EXchange (KPX) are used. To estimate the elasticities of substitution among four power sources (i.e. coal, natural gas, nuclear power, and renewable energy), this paper uses the trans-log cost function model on which local concavity restrictions are imposed. The estimated Hicks-Allen and Morishima elasticity of substitution shows that renewable electricity and nuclear power are complementary. The results also evidenced that renewable electricity and fossil fueled thermal power generation are substitutes.

Smart Grid and Its Implications for Electricity Market Design

  • Kim, Seon-Gu;Hur, Seong-Il;Chae, Yeoung-Jin
    • Journal of Electrical Engineering and Technology
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    • v.5 no.1
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    • pp.1-7
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    • 2010
  • Recently, smart grid has been considered a very important new energy delivery technology, and one that can help ensure a cleaner environment by making use of information and communication technology (ICT) in countries around the world. The many technological benefits smart grid offers is expected to bring about a huge change in the electric energy supply chain. In particular, smart grid with advanced ICT is likely to allow market agents to participate in the decision-making process in the restructured electricity industry, easily facilitating Homeostatic Utility Control. In this paper, we examine smart grid as a market externality, and then illustrate issues from the commercial market perspective as it relates to electricity market design. Finally, our paper identifies some of the impacts of smart grid on electricity market design, which may possibly be incorporated into the evolution of the electricity market, thus ensuring market efficiency.

Electricity Price Prediction Model Based on Simultaneous Perturbation Stochastic Approximation

  • Ko, Hee-Sang;Lee, Kwang-Y.;Kim, Ho-Chan
    • Journal of Electrical Engineering and Technology
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    • v.3 no.1
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    • pp.14-19
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    • 2008
  • The paper presents an intelligent time series model to predict uncertain electricity market price in the deregulated industry environment. Since the price of electricity in a deregulated market is very volatile, it is difficult to estimate an accurate market price using historically observed data. The parameter of an intelligent time series model is obtained based on the simultaneous perturbation stochastic approximation (SPSA). The SPSA is flexible to use in high dimensional systems. Since prediction models have their modeling error, an error compensator is developed as compensation. The SPSA based intelligent model is applied to predict the electricity market price in the Pennsylvania-New Jersey-Maryland (PJM) electricity market.

A Study on the Effects of Supervision Industry has a Direct as Supervision Service Ordering (감리용역 발주방식이 감리업계에 미치는 영향 고찰)

  • Nam, Ki-Beom;Lee, Jong-Hyuk;Yang, Sun-Sik;Jeong, Sang-Woong;Son, Young-Sun;Jung, Yeon-Hai
    • Proceedings of the KIEE Conference
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    • pp.3-5
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    • 2008
  • Electricity Technology Management Act were carried out enactment in last 1995 to prevent illegal construction practices of electricity equipment, Later electricity supervision service is ordered to electricity supervision trade who register by law demarcated Dept of Architecture, Wish to investigate present condition and problem of current electricity supervision system in this treatise and present improvement plan for right fixing of electricity supervision system.

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Security Constrained Optimal Power Flow Incorporating Load Curtailment Schedule (부하차단량을 고려한 상정사고 절약 최적조류계산 알고리즘 개발)

  • Chung, Koo-Hyung;Kang, Dong-Joo;Kim, Bal-Ho
    • Proceedings of the KIEE Conference
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    • pp.801-803
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    • 2005
  • Fundamentally, success of the competitive electricity market is dependent on efficient market design. However, since electricity incorporates various physical constraints as other commodities, the resource assignment (i.e., dispatch scheduling) is also one of requisites for the successful operation of electricity market. Therefore, efficient dispatch scheduling is an important issue to succeed in the deregulated electricity market and the efficiency of this electricity market may be considerably increased by systematic studies on dispatch scheduling algorithm and corresponding constraints, especially system security. Moreover, contrary to traditional vertically-integrated electric power industry condition, since various decision-makings in deregulated electricity market are directly connected with market participants' benefits, only rational dispatch scheduling algorithm can convince these participants. Therefore, it can provide a basis of grievance prevention. In this paper, we propose an algorithm for security constrained dispatch scheduling with respect to load curtailment. Proposed algorithm decomposes the dispatch problem into a master problem corresponding to basecase optimal power flow (OPF) and several subproblems corresponding a series of contingencies using two-stage optimization technique.

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