• 제목, 요약, 키워드: Congestion Management

검색결과 430건 처리시간 0.036초

혼잡처리의 해외 사례 분석을 통한 한국 전력시장에서의 혼잡처리 방안 모색 (Discussion of the Congestion Management for the Korea Electricity Market by Analyzing Several cases in the World)

  • 임규형;백영식;송경빈
    • 대한전기학회:학술대회논문집
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    • pp.385-387
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    • 2000
  • This paper discusses a scheme of the congestion management in the Korea electricity market under the deregulated environment. We investigated some cases of the congestion management in the world and the effects of the congestion management in a simple example. A basic idea of the congestion management in the Korea is presented based on the analysis of transmission congestion management in the competitive electricity market.

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한전 실계통의 혼잡처리에 대한 적용사례 (A Case Study of the Congestion Management for the Power System of the Korea Electric Power Cooperation)

  • 임규형;백영식;송경빈
    • 대한전기학회:학술대회논문집
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    • pp.110-112
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    • 2000
  • This paper presents a basic scheme of the congestion management in the Korea electricity market under the deregulated environment. We investigated some cases of the congestion management in the world and the effects of the congestion management in a real data. A basic idea of the congestion management in the Korea is presented based on the analysis of transmission congestion management in the competitive electricity market.

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Comparative Study of Two Congestion Management Methods for the Restructured Power Systems

  • Manikandan, B.V.;Raja, S. Charles;Venkatesh, P.;Mandala, Manasarani
    • Journal of Electrical Engineering and Technology
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    • v.6 no.3
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    • pp.302-310
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    • 2011
  • Congestion management is one of the most challenging tasks of a system operator to ensure the operation of transmission system within operating limits. In this paper, cluster/zone method and relative electrical distance (RED) method for congestion management are compared based on the considered parameters. In the cluster/zone method, rescheduling of generation is based on user impact on congestion through the use of transmission congestion distribution factors. In the RED method, the desired proportions of generations for the desired overload relieving are obtained. Even after generation rescheduling, if congestion exists, load curtailment option is also introduced. Rescheduling cost, system cost, losses, and voltage stability parameter are also calculated and compared for the above two methods of congestion management. The results are illustrated on sample 6-bus, IEEE 30-bus, and Indian utility 69-bus systems.

한전 실계통의 혼잡처리에 대한 적용사례 (A Case Study of the Congestion Management for the Power System of the Korea Electric Power Cooperation)

  • 송경빈;임규형;백영식
    • 대한전기학회논문지:전력기술부문A
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    • v.50 no.12
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    • pp.549-555
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    • 2001
  • Due to the development of information technology, the operating power systems under the deregulated environment has the advantages of a introduction of the market function, a competition in sales and purchases of Power, as well as the difficulty of maintaining reliability on the same or high level with it in a monopolistic market. This paper presents a basic scheme of the congestion management in the Korea electricity market under the deregulated environment. We investigated some cases of the congestion management in the world and the effects of the congestion management in the power systems. A basic idea of the congestion management in the Korea is presented based on the analysis of transmission congestion management in the competitive electricity market.

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A Congestion Management Approach Using Probabilistic Power Flow Considering Direct Electricity Purchase

  • Wang, Xu;Jiang, Chuan-Wen
    • Journal of Electrical Engineering and Technology
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    • v.10 no.3
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    • pp.820-831
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    • 2015
  • In a deregulated electricity market, congestion of the transmission lines is a major problem the independent system operator (ISO) would face. Rescheduling of generators is one of the most practiced techniques to alleviate the congestion. However, not all generators in the system operate deterministically and independently, especially wind power generators (WTGs). Therefore, a novel optimal rescheduling model for congestion management that accounts for the uncertain and correlated power sources and loads is proposed. A probabilistic power flow (PPF) model based on 2m+1 point estimate method (PEM) is used to simulate the performance of uncertain and correlated input random variables. In addition, the impact of direct electricity purchase contracts on the congestion management has also been studied. This paper uses artificial bee colony (ABC) algorithm to solve the complex optimization problem. The proposed algorithm is tested on modified IEEE 30-bus system and IEEE 57-bus system to demonstrate the impacts of the uncertainties and correlations of the input random variables and the direct electricity purchase contracts on the congestion management. Both pool and nodal pricing model are also discussed.

송전 혼잡처리방법 변경이 시장 참여자 수익에 미치는 영향 분석 (Analysis of the Economic Impact of the Change in Congestion Management in the Korean Electricity Market)

  • 주성관;김지희;문국현
    • 조명전기설비학회논문지
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    • v.22 no.6
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    • pp.134-140
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    • 2008
  • 국내 전력시장에서 현 혼잡처리방법은 혼잡비용(congestion cost)을 부가비용(uplift)형태로 전력 사용량에 비례하여 시장 전체의 모든 소비자가 부담하고 있다. 반면 다수의 해외 전력시장에서 채택하고 있는 지역한계가격 (Locational Margnal Pricing)방식은 혼잡으로 인한 비용을 시장 참여자들에게 차등적으로 배분하고 있다. 현재 국내 전력시장에서는 송전 혼잡처리방법의 변경으로 인한 시장참여자 수익에 미치는 영향에 대한 체계적인 연구가 미흡한 실정이다. 본 논문에서는 혼잡처리방법의 변경이 국내 전력시장의 소비자 비용과 발전기 잉여에 미치는 영향에 대해서 분석한다.

Model of Information Exchange for Decentralized Congestion Management

  • Song, Sung-Hwan;Jeong, Jae-Woo;Yoon, Yong-Tae;Moon, Seung-Il
    • Journal of Electrical Engineering and Technology
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    • v.7 no.2
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    • pp.141-150
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    • 2012
  • The present study examines an efficient congestion management system compatible with the evolving environment. The key is to build an information model shared and exchanged for marketbased solutions to alleviate congestion. Traditional methods for congestion management can be classified into two categories, i.e., the centralized scheme and the decentralized scheme, depending on the extent to which the independent system operator (ISO) is involved in market participants' (MPs) activities. Although the centralized scheme is more appropriate for providing reliable system operation and relieving congestion in near real-time, the decentralized scheme is preferred for supporting efficient market operation. The minimum set of information between the ISO and MPs for decentralized scheme is identified: i) congestion-based zone, ii) Power Transfer Distribution Factors, and iii) transmission congestion cost. The mathematical modeling of the proposed information is expressed, considering its process of making effective use of information. Numerical analysis is conducted to demonstrate both cost minimization from the MP perspective and the reliability enhancement from the ISO perspective based on the proposed information exchange scheme.

지역별 혼잡처리 방식에서의 공급자 거래전략 연구 (A Study on Strategic Behaviors in Zonal Congestion Management)

  • 이광호
    • 대한전기학회:학술대회논문집
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    • pp.572-574
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    • 2003
  • The congestion management is a key task for enhancing the effectiveness of transmission pricing mechanism in a competitive electricity market. In this paper, the zonal method of congestion management is analyzed quantitatively using equilibrium concept, and compared with the nodal pricing method. It is shown that the generation firm uses different strategies in the two methods, and the overall performance of zonal congestion management depends on the determination of zones.

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민감도를 이용하여 풍력단지가 연계된 송전계통의 최적혼잡처리 (Optimal Congestion Management Based on Sensitivity in Power System with Wind Farms)

  • 최수현;김규호
    • 전기학회논문지
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    • v.65 no.12
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    • pp.1965-1970
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    • 2016
  • This paper studies generator rescheduling technique for congestion management in power system with wind farms. The proposed technique is formulated to minimize the rescheduling cost of conventional and wind generators to alleviate congestion subject to operational line overloading. The generator rescheduling method has been used with incorporation of wind farms in the power system. The locations of wind farms are selected based upon power transfer distribution factor (PTDF). Because all generators in the system do not need to participate in congestion management, the rescheduling has been done by generator selection based on the proposed generator sensitivity factor (GSF). The selected generators have been rescheduled using linear programming(LP) optimization techniques to alleviate transmission congestion. The effectiveness of the proposed methodology has been analyzed on IEEE 14-bus systems.

BTDF를 이용한 직거래 전력시장에서의 혼잡처리에 관한 연구 (A study of congestion management in bilateral electricity market using BTDF)

  • 이승진;이기송;박종배;신중린;이명환
    • 대한전기학회:학술대회논문집
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    • pp.609-611
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    • 2003
  • This paper presents a method for a congestion management in the competitive market which is modeled as the multiple bilateral transaction. Traditionary, the congestion management for the multiple bilateral transaction is accomplished through the process of adjustment bids. It is necessary in for the market entity to submit their price information when the congestion is occured. Finally, the ISOs can be blown about the approximated contract price of participants from the price of adjustment bids. However, the entities can submit only the amount of their contract to ISOs and ISOs are required the method to manage the congestion only by the contracted quantity. Therefore, this paper presents a method for congestion management by curtailing the only contracted quantity of market entities. To evaluated the above problem, we suggest Bilateral Transaction Distribution Factors(BTDFs), which is the sensitivity of line flow with curtailment of transactions. Using this factor, we studied about congestion management when the objective function is to minimize total curtailment of transaction.

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