• Title, Summary, Keyword: power

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Feasibility Study on the Integration Power System combining Tidal Power Generation and Ocean Current Power Generation (조력발전과 해류발전을 겸하는 통합발전시스템 타당성 연구)

  • Jang, Kyung-Soo;Lee, Jung-Eun
    • 한국신재생에너지학회:학술대회논문집
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    • pp.611-614
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    • 2009
  • The present paper relates to an integration power system combining tidal power generation and ocean current power generation, and more particularly, to an integration power system combining a tidal power plant and two ocean current power parks, which is capable of increasing the operating rate of power facilities and efficiently generating electrical energy by using incoming seawater into the lake through turbine generators of a tidal power plant or fast flow of seawater discharged to a sea side through sluice gates of a tidal power dam. It is shown that the integration power system is a new promising ocean power system and the ocean current turbine generators in the ocean current power parks of the integration power system are smaller in size and larger in power generation capacity compared with the tidal current turbine generators in the ocean.

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A Study on Photovoltaic/Wind/Diesel Hybrid Power System

  • Jeong, Byung-Hwan;Cho, Jun-Seok;Gho, Jae-Seok;Choe, Gyu-Ha;Kim, Eung-Sang;Lee, Chang-Sung
    • Journal of Power Electronics
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    • v.3 no.1
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    • pp.40-48
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    • 2003
  • In this paper, a hybrid power system with photovoltaic/wind/diesel generators is proposed to solve the defect of stand-alone type power system in a remote area. A hybrid power system has a power-balanced controller to equilibrate generation power with a given load demand and which is composed of common DC power system. To execute a power-balanced control, a hybrid power system is assumed that all of power generators have the characteristics of an equivalent current-source and load sharing control technique must be needed at the same time. So this paper discusses the structure of power-balance control for hybrid power system. And through the results of simulation, the proposed scheme was verified.

A Study on Effective Enhancement of Load Power Factor Using the Load Power Factor Sensitivity of Generation Cost

  • Lee Byung Ha;Kim Jung-Hoon
    • KIEE International Transactions on Power Engineering
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    • v.5A no.3
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    • pp.252-259
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    • 2005
  • Various problems such as increase of power loss and voltage instability may often occur in the case of low load power factor. The demand of reactive power increases continuously with the growth of active power and restructuring of electric power companies makes the comprehensive management of reactive power a troublesome problem, so that the systematic control of load power factor is required. In this paper, the load power factor sensitivity of generation cost is derived and it is used for effectively determining the locations of reactive power compensation devices and for enhancing the load power factor appropriately. In addition, voltage variation penalty cost is introduced and integrated costs including voltage variation penalty cost are used for determining the value of load power factor from the point of view of economic investment and voltage regulation. It is shown through application to a large-scale power system that the load power factor can be enhanced effectively using the load power factor sensitivity and the integrated cost.

Technical Problems and solution based on Connection of Dispersed Power System into Power Distribution System (분산형전원의 배전계통연계에 따른 기술적 과제와 대책)

  • Yoon, G.G.;Yoon, T.S.;Roh, H.N.;Park, C.H.;Kim, J.O.;Kim, J.S.
    • Proceedings of the KIEE Conference
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    • pp.485-487
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    • 2001
  • Electric power has traditionally been supplied to the demander through power generation, its transmission, and final distribution system. It is, however, expected that the various dispersed power system will be located near demanders and act as a power source based on the efficient management of electric power demanders and the optimal utilization of substitute energy. More stable electric power and efficient utilization of various power sources can be guranteed through the connection of the dispersed power system into the existing power system. It is the purpose of this study that, in the case of the connection of dispersed power system into the existing distribution line, effects of the connection on the power quality and plans for protection of power equipments are discussed and solutions of them are proposed.

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Evaluation of the Reliability of Distribution Power Systems Considering Composite Customer Interruption Cost

  • Choi Sang-Bong;Nam Kee-Young;Kim Dae-Kyeong;Jeong Seong-Hwan;Lee Jae-Duk;Ryoo Hee-Suk
    • KIEE International Transactions on Power Engineering
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    • v.5A no.3
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    • pp.286-292
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    • 2005
  • As the power industry moves towards open competition, there has been a call for methodology to evaluate power system reliability by using composite interruption cost. This paper presents algorithms to evaluate the interruption cost of distribution power systems by taking into consideration the failure source and the composite customer interruption cost. From the consumer's standpoint, the composite customer interruption cost is considered as the most valuable index to estimate the reliability of a power distribution system. This paper presents new algorithms that consider the load by customer type and failure probability by distribution facilities while calculating the amount of unserved energy by customer type. Finally, evaluation results of unserved energy and system interruption cost based on composite customer interruption cost are shown in detail.

Integrated Power System Combining Tidal Power and Ocean Current Power (조력발전과 해류발전을 겸하는 통합발전시스템)

  • Jang, Kyung-Soo;Lee, Jung-Eun
    • 한국신재생에너지학회:학술대회논문집
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    • pp.270-273
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    • 2008
  • The integrated power system combining a tidal power plant and two ocean current power parks is suggested. It is characterized by the set up of an ocean current power park in the lake side by installing a number of ocean current turbines generating electricity by using sea water flow discharged into the lake side from the turbine generator of a tidal power plant and an ocean current power park in the sea side by installing a number of ocean current turbines generating electricity by using sea water flow exiting into the sea side through the sluice gate from the lake side. The vision of the integrated power system is demonstrated by the simple theory and simulation results of the SIWHA Tidal Power Plant. And it is shown that the newly proposed integrated power system combining tidal power and ocean current power can produce very high economical benefits.

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A Study on the Improving Power System Reliability According to the Reactive Power Problem in the Bulk Power Station (대전원단지의 무효전력 출력제약에 따른 영향에 대한 연구)

  • Song, Seok-Ha;Joo, Joan-Young
    • Proceedings of the KIEE Conference
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    • pp.73-75
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    • 2002
  • This paper presents the properly method of system security and facility countermeasures. We performed simulation for yearly peak of Korean power system in 2002 under the reactive power problem in a nuclear power plants. Analysis of the problems in power system operation by power flow, fault and stability study. Establishment of power system optimal operating plan by stabilizer and maintaining the reasonable voltage level.

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