• Title/Summary/Keyword: distribution configuration

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A Study on the Protective Coordination of Distribution Automation System under Loop Operation (배전자동화 계통의 루프 운전시 보호협조에 관한 연구)

  • Lee, Hee-Tae;Moon, Jong-Fil;Kim, Jae-Chul
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.58 no.7
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    • pp.1281-1286
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    • 2009
  • As a general radial configuration of power distribution system, the various researches have being studied to change a radial configuration to network one such as smart, intelligent and micro grid for loop operation. If a radial configuration changes to network, protective coordination comes to the biggest problem. When a typical protective algorithm is applied to loop distribution system protection, the interrupted section is expanded, therefore, reliability grows worse. This paper presents the new protective method being able to apply to loop distribution system with Distribution Automation System (DAS) which separate the minimal faulted section. Through contingency analysis of the sustained and momentary fault, we analyzed the influence for radial configuration and loop configuration using interrupted area and proved the effectiveness of proposed method.

Reasonable Evaluation Technique in Regional Configuration of Underground Distribution System (지역별 지중 배전계통 구성방식의 합리적인 평가 기법)

  • Choe, Sang-Bong;Kim, Dae-Gyeong;Jeong, Seong-Hwan
    • The Transactions of the Korean Institute of Electrical Engineers A
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    • v.49 no.3
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    • pp.124-135
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    • 2000
  • This paper presents reasonable evaluation technique to determine system configuration of underground distribution system. To set up reasonable evaluation for a certain object region, it is necessary for methodology to access accurately factors such as economics, reliability, customer interruption cost, implementation and flexibility about proposed various configuration of underground distribution system. But it is difficult to evaluate factors as above-mentioned since there is no criterion to assess them in our country. Accordingly, having completed the technical and economical analysis and customer interruption cost of various types of system, this paper presents the most reasonable results to get the optimal configuration of underground distribution system. Also, this paper presents possible methodology which can be applied other areas having a different load characteristics by application actually making a selection Myungdong as sample area.

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A Study on the Configuration Schemes for Railway Power Distribution System on the basis of power Quality, reliability, and economic aspects (운용성, 경제성에 기초한 철도 배전계통 구성방안)

  • Oh, Kwang-Hae;Kim, Joo-Rak;Lee, Han-Min;Chang, Sang-Hoon
    • Proceedings of the KIEE Conference
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    • 2002.07b
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    • pp.1254-1257
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    • 2002
  • This study presents the configuration schemes for railway power distribution system. The possible alternatives are derived and reviewed on the basis of power quality, reliability, and economic aspects. As a result, a few of configuration schemes are recommended for railway power distribution system

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A Re-Configuration Genetic Algorithm for Distribution Systems (배전계통에서 유전적 알고리즘을 이용한 접속변경순서결정방법)

  • Choi, Dai-Seub
    • Proceedings of the KIEE Conference
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    • 2005.05b
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    • pp.62-63
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    • 2005
  • Recently, sectionalizing switches have been coming to be operated by remote control through the distribution SCADA system. However, the problem of determining the optimal switching sequence is a combinatorial optimization problem, and is quite difficult to solve, Hence, it is imperative to develop practically applicable solution algorithms create a new arbitral distribution system configuration from an initial configuration, and some of these algorithms do not show a load transfer sequence to reach the objective system.

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A Re-Configuration Genetic Algorithm for Distribution Systems (배전계통에서 유전적 알고리즘을 이용한 접속변경순서 결정방법)

  • Choi, Dai-Seub
    • Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference
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    • 2004.11a
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    • pp.381-383
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    • 2004
  • Recently, sectionalizing switches have been coming to be operated by remote control through the distribution SCADA system. However, the problem of determining the optimal switching sequence is a combinatorial optimization problem, and is quite difficult to solve. Hence, it is imperative to develop practically applicable solution algorithms create a new arbitral distribution system configuration from an initial configuration, and some of these algorithms do not show a load transfer sequence to reach the objective system.

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A Re-Configuration Genetic Algorithm for Distribution Systems (배전계통에서 유전적 알고리즘을 이용한 접속변경순서결정방법)

  • Choi, Dai-Seub
    • Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference
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    • 2005.05a
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    • pp.418-420
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    • 2005
  • Recently, sectionalizing switches have been coming to be operated by remote control through the distribution SCADA system. However, the problem of determining the optimal switching sequence is a combinatorial optimization problem, and is quite difficult In solve. Hence, it is imperative to develop practically applicable solution algorithms create a new arbitral distribution system configuration from an initial configuration and some of these algorithms do not show a load transfer sequence to reach the objective system.

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Study on the Design of Thin Intersected Axe Gear (박육직교축 치차의 설계에 관한 기초적 연구)

  • ;梅澤 淸彦
    • Journal of Advanced Marine Engineering and Technology
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    • v.17 no.3
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    • pp.80-87
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    • 1993
  • The various configuration of thin-shaped bevel gears are used usually for such as main reduction gear of the hovercraft. But the reasonable and concise guide to thedesign of the se bevel gears is not yet obtained, since the tooth of bevel gear has complex form. The purpose of these investigation is to be establish the design guide and to propose the desirable configuration form for thin-shaped straight bevel gear. In this report, the desirable configuration is examined experimentally by clearing up the effect of web and rim thickness, rim support condition upon the load distribution and root stress distribution along the tooth trace. The results are summarized as follows. (1) The crowning of tooth trace exerts a significant effect on the root stress distribution of thin-shaped bevel gear. (2) As the desirable configuration of the thin-shaped bevel gear, it is to be recommended that the rim is supported at the heel side of tooth trace. (3) But, as special type, it is desirable that the rim is supported at the toe side.

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A Fast Configuration Method for Load Balancing in Distribution System (배전계통의 부하평형을 고려한 고속 계통구성방법)

  • Nam, Kee-Young;Choi, Sang-Bong;Jeong, Seong-Hwan;Ryoo, Hee-Suk;Kim, Ho-Yong
    • Proceedings of the KIEE Conference
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    • 2003.07a
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    • pp.381-383
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    • 2003
  • The authors have developed a solution method based on the incremental algorithm. The optimal load balance between feeders is found through the incremental algorithm with allowing the loop configuration. Therefore loops can be configured in the resulting configuration, and then we must eliminate all loops to satisfy radiality of distribution system because the distribution system is operated under radial status. But the optimal load balance through incremental algorithm is deteriorated when the loops are eliminated. In this paper, authors propose a new method which is to improve the searching procedure of path in the incremental algorithm, that is, so as not to make loop in the path configuration.

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Distribution of Air-Water Two-Phase Flow in a Header of Aluminum Flat Tube Evaporator (알루미늄 평판관 증발기 헤더 내 공기-물 2상류 분지 실험)

  • Kim Nae-Hyun;Shin Tae-Ryong;Sim Yong-Sup
    • Korean Journal of Air-Conditioning and Refrigeration Engineering
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    • v.18 no.1
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    • pp.55-65
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    • 2006
  • The air and water flow distribution are experimentally studied for a round header - flat tube geometry simulating a parallel flow heat exchanger. The number of branch flat tube is thirty. The effects of tube outlet direction, tube protrusion depth as well as mass flux, and quality are investigated. The flow at the header inlet is identified as annular. For the downward flow configuration, the water flow distribution is significantly affected by the tube protrusion depth. For flush-mounted configuration, most of the water flows through frontal part of the header. As the protrusion depth increases, more water is forced to the rear part of the header. The effect of mass flux or quality is qualitatively the same as that of the protrusion depth. Increase of the mass flux or quality forces the water to rear part of the header. For the upward flow configuration, however, most of the water flows through rear part of the header. The protrusion depth, mass flux, or quality does not significantly alter the flow pattern. Possible explanations are provided based on the flow visualization results. Negligible difference on the water flow distribution was observed between the parallel and the reverse flow configuration.

A Review of Strategy to Capture Niche Marketing of HTS Power Distribution Cable

  • Park, Sang-Bong;Nam, Kee-Young;Kim, Dae-Kyeong;Jeong, Seong-Hwan;Ryoo, Hee-Suk
    • KIEE International Transactions on Power Engineering
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    • v.4A no.1
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    • pp.11-17
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    • 2004
  • It becomes difficult and high in cost to construct new ducts and/or tunnels for power cables in domestic areas. This paper presents possible strategy of an HTS distribution cables for distributing electric power in local areas as niche marketing. Reflected were its important distinction such as system configuration, rationale, establishment of strategy and considerably high economical efficiency compared with present underground cables. In this paper, applicable important items by using HTS distribution cables in water pumping powerhouse and distribution substation as example objective regions were reviewed. Based on this, the following items on distribution HTS system are examined. (I)A review of constructing a model system to introduce high temperature superconducting distribution cables to objective areas is presented. (2)The strategy to capture HTS distribution cable in water pumping powerhouse and distribution substation as niche marketing regions were reviewed. (3)In concrete, system configuration, rationale, establishment of strategy and considerably high economical efficiency are reviewed between existing cable and HTS one.