• Title, Summary, Keyword: Transmission

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Economic Evaluation of Transmission Expansion for Investment Incentives in a Competitive Electricity Market

  • Fischer, Robert;Joo, Sung-Kwan
    • International Journal of Control, Automation, and Systems
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    • v.6 no.5
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    • pp.627-638
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    • 2008
  • With the shift of the electric power industry from a regulated monopoly structure to a competitive market environment, the focus of the transmission expansion planning has been moving from reliability-driven transmission expansion to market-based transmission expansion. In market-based transmission expansion, however, a growing demand for electricity, an increasing number of transmission bottlenecks, and the falling levels of transmission investment have created the need for an incentive to motivate investors. The expectation of profit serves as a motivational factor for market participants to invest in transmission expansion in a competitive market. To promote investment in transmission expansion, there is an increasing need for a systematic method to examine transmission expansion for investment incentives from multiple perspectives. In this paper, the transmission expansion problem in a competitive market environment is formulated from ISO and investors' perspectives. The proposed method uses parametric analysis to analyze benefits for investors to identify the most profitable location and amount for transmission addition. Numerical results are presented to demonstrate the effectiveness of the proposed method.

A Study on Vibration Characteristics by Gear Transmission Error of Vehicle Transmission (자동차용 변속기의 치합전달오차에 의한 진동특성 연구)

  • 배명호;박노길
    • Transactions of the Korean Society for Noise and Vibration Engineering
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    • v.11 no.8
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    • pp.364-373
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    • 2001
  • The gear whine noise of vehicle transmission is directly correlated tilth the gear transmission error of mating gear The object of this study is to build up the synthesized countermeasure for the reduction of gear whine noire of vehicle transmission by developing the program which can be used to analyze and predict the vibrational characteristics caused by gear transmission error of mating gears of vehicle transmission. The developed mathematical models on the elements of transmission, for example, helical gear pairs, bearings and shafts are used and the modeling of the excitation forces are developed by the gear transmission error of mating gear which is defined by the amount of the elastic deformation of gear tooth & shaft and gear profile & lead errors. The mathematical system model of vehicle transmission developed by the substructure synthesis method Is also verified by the experiments.

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A case study on the prevention and occurrence of fault in Transmission & Substation (변전설비의 보수 정비 사례 및 고장 실태 조사 연구)

  • Lee, Seog-Kyu;Park, Hee-Woo;Kim, In-Kun;Lee, Jong-Hak;Lee, Man-Seon
    • Proceedings of the KIEE Conference
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    • pp.83-85
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    • 1999
  • Recently, a rapid increase of electricity demands have made Transmission & Substation device large-sized. complicated and diverse. Moreover, a rising level of customer's requirement and high growth of industry increase the reliability of electricity service. Therefore on the basis of the case study on the occurrence of fault, the prevention of defects for each device and the analyzing of the outbreak and prevention of systematic breakdown in Sin-Incheon Power Transmission Branch Office, this paper presents some important matters and suggests the method of improvement in design, construction, maintenance, and repairing the Transmission & Substation device.

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Transmission Pricing Methodology for Korean Wholesale Electricity Market (도매경쟁 전력시장에서의 송전요금 산정방식)

  • Lee, K.D.;Rhee, C.H.;Oh, T.K.;Park, B.Y.;Kim, Y.W.;Kim, Y.C.
    • Proceedings of the KIEE Conference
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    • pp.192-194
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    • 2001
  • The Transmission network provides physical transport, network security, and connection services. The five principles of Transmission pricing are economic efficiency, cost recovery, efficient regulation, simplicity and transparency, non-discrimination. The Transmission Charges are made up of transmission connection charge and transmission charge of network. The Transmission Losses will be considered through Marginal Transmission Loss Factors in the market operation. The transmission loss rentals are used for the reduction of the annual revenue requirement of the transmission network for the purpose of derivation of transmission use of network charge.

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A Study on the Transmission-tribology Design Based on Existing Problem of the Gear Drive and Tribology

  • Lyu, Sung-Ki;Lu, Long;Wei, Yun-Long
    • International Journal of Precision Engineering and Manufacturing
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    • v.7 no.2
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    • pp.3-7
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    • 2006
  • We propose a new concept of transmission-tribology design based on the investigation of development and existing problems of the gear drive and tribology. The content of transmission-tribology and transmission-tribology design is probed. Some effective methods of transmission-tribology design is probed. Some effective methods of transmission-tribology design are put forward. Partial achievements in this research are introduced tersely. Mechanical transmission, which is represented by the gear drive, and tribology are two main branches of mechanical engineering. They have their own definite research field. In recent years, we have been doing our utmost to suggest combining mechanical transmission-tribology and transmission-tribology design. Partial achievements in this research area are obtained.

The Best Line Choice for Transmission System Expansion Planning on the Side of the Highest Reliability Level

  • Sungrok Kang;Trungtinh Tran;Park, Jaeseok;Junmin Cha;Park, Daeseok;Roy Billinton
    • KIEE International Transactions on Power Engineering
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    • v.4A no.2
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    • pp.84-90
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    • 2004
  • This paper presents a new method for choosing the best line for transmission system expansion planning considering the highest reliability level of the transmission system. Conventional methodologies for transmission system expansion planning have been mainly focused on economics, which is the minimization of construction costs. However, quantitative evaluation of transmission system reliability is important because successful operation and planning of an electric power system under the deregulated electricity market depends on transmission system reliability management. Therefore, it is expected that the development of methodology for choosing the best lines considering the highest transmission system reliability level while taking into account uncertainties of transmission system equipment is useful for the future. The characteristics and effectiveness of the proposed methodology are illustrated by the case study using a MRBTS.

Influence of Internal Partition of Simple Extension Chamber on the Acoustic Transmission Loss (단순 확장 관 내부 파티션이 음향 투과손실에 미치는 영향해석)

  • Park, Jeong-Pil;Jeong, Weui-Bong;Ahn, Se-Jin
    • Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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    • pp.690-692
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    • 2014
  • To identify characterization of a simple extension chamber that have the two internal partition, produce the curve to estimate the transmission loss without the computer analysis. For helpful for internal optimum design, identify the characteristic of internal partition on transmission loss. Made estimated transmission loss curve by function of relationship of internal partition and transmission. Check the similarity of predicted transmission loss and analysis transmission loss. Usage of the predicted transmission loss made by relationship of internal partition and transmission loss is good information to place the internal partition so as to maximize the transmission loss on target frequency at optimal design on muffler.

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Rotational Viscoelastic Dampers for the Mitigation of Wind Loads on Transmission Tower Transferred from Transmission Lines (송전선에 의해 송전철탑에 전달되는 풍하중 저감을 위한 회전형 점탄성감쇠기)

  • Moon, Byoung-Wook;Min, Kyung-Won
    • Transactions of the Korean Society for Noise and Vibration Engineering
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    • v.16 no.4
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    • pp.420-427
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    • 2006
  • In this study, wind loads transmitted to a transmission tower from transmission lines are mitigated using rotational viscoelastic dampers. First, the wind load characteristics in a transmission tower is investigated considering the effect of the transmission lines through stochastic analysis. The assemblage of the transmission line and insulator are modeled as a double pendulum system connected to the SDOF model of the tower. From the result of the stochastic analysis, the background component of the overturing moment caused by the wind loads acting on the transmission lines are found to have considerable portion in the total overturning moment. Based on this observation result, a strategy Installing rotational viscoelastic damper (VED) between tower arm and transmission line is proposed for the mitigation of the transmission line reactions, which play a role as dynamic loads on a transmission tower. For the purpose of verification, time history analysis is conducted for different wind velocities and VED parameters. The analysis result shows that the rotational VED is effective for the mitigation of the background component rather than the resonance component of the transmission line reactions and achieves the reduction ratio of 50% even for higher wind speed.

An analysis of data transmission characteristics in railway using MATLAB (MATLAB에 의한 열차 데이터 전달 특성 해석)

  • Ahn, Sang-Kwon;Choi, Gui-Man;Kim, Yang-Mo
    • Proceedings of the KIEE Conference
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    • pp.367-369
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    • 1997
  • In signal system such as MAGLEV, the transmission channel that has wireless transmission line between on-board and ground-site is susceptible to have interference and may introduce data error on transmission. In this paper, by applying inductive wireless and FSK(frequency shift keying) modulation using widely in railway signal system, we intend to analyze the data transmission characteristics. In this case, noise may have effect on transmission channel. Therefore transmission channel should be lessened the data error from random noise. Considering the transmission medium, the objective of this study is to analyze the transmission characteristics between on-board and ground-site and to obtain transmission performance.

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Analysis of Switching Surge in Overhead Transmission Line with Underground Cable Line (가공 및 케이블로 구성된 선로의 개폐서지 해석)

  • Kang, Y.W.;Shim, E.B.;Joo, B.S.;Kim, M.D.
    • Proceedings of the KIEE Conference
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    • pp.1938-1940
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    • 1996
  • As transmission systems has been complicated and various, cases of transmission systems which is made up with underground cable line only or overhead transmission line with underground cable line have been increased. When transmission lines with different types of cable, it is more likely to be vulnerable to the surges. This paper analyzed these surge in 154kV transmission line by means of EMTP (Electro Magnetic Transient program).

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