• 제목/요약/키워드: Automatic Distribution System

검색결과 355건 처리시간 0.026초

The Development of Application Programs for Optimal Feeder Operation Through Distribution Automatic System

  • Ha, Bok-Nam;Seol, Ieel-Ho;Jeong, Mi-Ae
    • KIEE International Transactions on Power Engineering
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    • 제4A권1호
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    • pp.42-47
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    • 2004
  • This paper presents the various application programs for the Distribution Automation System (DAS) of the Korea Electric Power Corporation (KEPCO)'s distribution system. These programs are developed to allow for optimal operation in the areas of feeder automation, relay coordination, loss minimization and so on. They are single line diagram auto creation programs for the feeder, service restoration program, protection coordination program, data error detection program, and optimal network reconfiguration program. The details of these programs are presented for validity and effectiveness.

배전계통의 보호협조측면에서 본 분산전원 연계용량 검토 (Interconnection Capacity Evaluation of Distributed Resources at the Distribution Networks in View of Distribution Protection Coordination)

  • 최준호;노경수;박성준;송경빈;윤상윤
    • 조명전기설비학회논문지
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    • 제21권3호
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    • pp.107-116
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    • 2007
  • 정부의 신 재생 에너지 관련 정책으로 인해 앞으로 국내에서 신 재생에너지원은 보급은 증가할 것으로 예상된다. 신 재생에너지원은 전원의 특성상 전력계통에 연계되어 운전하는 것이 일반적이지만 이러한 연계 운전은 전력계통 계획 및 운영상에 상당한 영향을 미치게 된다. 기존 배전계통의 전력조류는 변전소에서 수용가를 향한 단방향이며 이를 기반으로 계통운영이 이루어지고 있으나, 신 재생에너지원의 연계로 배전계통에 양방향의 전력조류가 형성되므로 기존의 보호시스템의 신뢰성 및 전력품질이 저하될 수 있다. 따라서 신 재생에너지원의 연계평가에 대한 기술적 평가절차가 필요하다. 본 논문에서는 국내 배전계통의 전형적인 보호기기인 자동 재폐로 차단기와 구분개폐기의 특성을 살펴보고, 현재의 자동재폐로 차단기-구분개폐기 보호시스템에서 분산전원의 연계용량을 검토하는 방안을 제시하고자 한다.

자동측지장비를 이용한 표적 측지 오차해석 (Target Positioning Error Analysis of Automatic Survey System)

  • 장석원;이태규;이진승
    • 한국군사과학기술학회지
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    • 제18권1호
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    • pp.1-7
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    • 2015
  • In this paper, we have described target positioning of automatic survey system. Target positioning error analysis shows target positioning errors are mainly dependent on the vertical angle of the triangle configured by target and two measurement points. Suggested target positioning error formula are confirmed by simulation using the Gaussian distribution.

병원물류 공동화를 위한 통합물류 시스템 구축에 관한 연구 (A Study on the Development of Integrated Logistics System for Hospital Logistics Cooperation)

  • 박종석;김한성;이재건;최훈영;강경식
    • 대한안전경영과학회지
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    • 제16권2호
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    • pp.139-146
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    • 2014
  • In Korea's distribution and production field establishment of logistics information system and automation of logistics were greatly developed. But there is no characteristic and professionalism about hospital logistics, and distribution center is located in outside warehouse, logistics system is very important. Since hospital has human power to receive product, system is not as much required, but outside warehouse requires system for arrival from medicine and medical supplies wholesale dealer and vender, warehousing, storage, and automation facilities, and system for various works such as peaking instruction, classification, packing, cargo-working, delivery, order of medicine from hospital and non-medicine in hospital is essential. Therefore, This study is about development of automatic identification of slide which cannot be overlooked in efficiency of hospital logistics, establishment of database, and information interlocking between automatic storage system and outside warehouse.

전력선을 이용한 자동검침 시스템에서의 PSK 복조 및 동기처리 (PSK Demodulation and Synchronization at Automatic Meter Reading System using Distribution Power Lines.)

  • 김인수;박양하;오상기;김관호;김요희;문홍석;박세웅
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 1991년도 하계학술대회 논문집
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    • pp.870-873
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    • 1991
  • In this paper, We present demodulation and synchronization method of phase shift keying signal using Double Frequency Vector Technique for Reference Vector. 2nd Harmonic Vector for Reference Vector is utilized in discriminating between noise and carrier signal, and in producting correlation value for data bit logical level. And we applied this demodulator to Automatic Meter Reading System being communicated with electric distribution power lines.

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베전 계통의 손실 최소화를 위한 시뮬레이티드 어닐링과 타부 탐색의 적용 (Application of Simulated Annealing and Tabu Search for Loss Minimization in Distribution Systems)

  • 전영재;김재철
    • 대한전기학회논문지:전력기술부문A
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    • 제50권1호
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    • pp.28-37
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    • 2001
  • This paper presents an efficient algorithm for the loss minimization of distribution system by automatic sectionalizing switch operation in large scale distribution systems. Simulated annealing is particularly well suited for large combinational optimization problem, but the use of this algorithm is also responsible for an excessive computation time requirement. Tabu search attempts to determine a better solution in the manner of a greatest-descent algorithm, but it can not give any guarantee for the convergence property. The hybrid algorithm of two methods with two tabu lists and the proposed perturbation mechanism is applied to improve the computation time and convergence property Numerical examples demonstrate the validity and effectiveness of the proposed methodology using a KEPCO's distribution system.

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자동배차 지원시스템의 발견적 알고리즘 설계 (Design of Heuristic Algorithm of Automatic Vehicle Delivery Support System)

  • 이명호;김내헌;신재율
    • 산업경영시스템학회지
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    • 제23권58호
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    • pp.59-69
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    • 2000
  • Development of digital information and internet technology causes the changes of technology environments and companies, and the variety of customer needs has been dynamically changed in terms of integrating information system with customer satisfaction. Moreover a new logistics concept is needed through the sharing information between suppliers and consumers, which maximizes the level of customers service and its flexibility by changing functional-oriented to process-oriented. In other words, Supply Chain Management (SCM) is now considered as a key aspect of business, which controls the flows of information, funds, and goods in the supply chain. Rationalization of transport-delivery system will be one of the most important issues on logistics management to the domestic companies. The companies need the effective delivery system. Especially in the case of delivery system from distribution centers to customers or vendors, it might take a long time to control the delivery system manually because it would be hard to apply the automatic vehicle routing algorithm effectively considering all the practical constraints. Thus this study develops a heuristic algorithm of automatic vehicle delivery support system in terms of grouping by short ranges of vehicle movement utilizing postal coordinates, which satisfies a variety of realistic constraints and reduces controlling time of manual operations. In addition, the performance of the algorithm developed in this study is evaluated through the case study.

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접촉식 자동 형상제어 장치의 특성에 관한 연구 (A Study on Characteristics of Automatic Flatness Control System of Contact Type)

  • 김문경;전언찬;김순경
    • 한국정밀공학회지
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    • 제13권5호
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    • pp.67-73
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    • 1996
  • The necessity for more accurate automatic flatness control(AFC) system has increased of customers' requirement for cold rolled steel sheet. Therefore, many cold rolling mills replaced its AFC system with a measuring roll of the contact type form the non-contact type. In this paper. The performance of AFC system of contact type has been investigated under industrial conditions. It has two kinds of actuator: roll bender, spot cooling system. The test results are as follows: The more strip thickness is thick, the smaller the I value, and the more it is thin, the bigger the I value. And a complex distribution of strip tension was controlled, for example, not only a pocket wave but also a simple center wave and edge wave. Because the tension deviation is larger at acceler- ation speed and decelerationspeed than steady speed, AFC system of contact type is better to adopt over 50m/mim. AFC system reduces rapidly large flatness deviation. The maximum I value of strip has been decreased to 13 I, and sticker, defects caused by poor flatness, have been decreased about 60%.

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라비니오 유성기어의 신뢰성 및 수명에 관한 연구 (A Study on the Reliability and Life of the Ravigneaux Planetry Gear Train)

  • Kim, T.H.;Kim, H.S.;Yang, S.M.
    • 한국정밀공학회지
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    • 제13권10호
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    • pp.36-45
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    • 1996
  • The precise estimation of the reliability and life of the Ravigneaux planetary gear train used in an automatic transmission is necessary in order to enable accurate material and geometric properties to reliability distrobution and the number of load cycles at failure. These are critical for the proba- bilistic design of complex planetary gear system as Ravigneaux type particularly during various gear ratios. The Ravigneaux planetary gear train has five gears, such as a forward and a reverse sun gear, a short and a long pinion, and an annulus gear. In this paper, the Ravigneaux gear system is analyzed to figure out the reliablity distribution. i.e. the probability of survival in the system without its overhaul. First, the reliablity method based on the Weibull distribution is used in conjuction with the Palmgren's model to predict both the individual reliabilities of its components and the nimber of load cycles when the system failed. Then using the presented method, the life of the Ravigneaux gear system can be determined. Alwo the different design parameters such as tooth face width, material property, and Weibull exponent are applied and reached to optimal ones. Thus, the precise evaluation of the reliability and life of the Ravigneaux planetary gear train used in an automatic transmission can be effectively carried out.

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계통유연자원을 활용한 분산에너지 계통접속 한계용량 증대 기술 (Distributed Energy System Connection Limit Capacity Increase Technology Using System Flexible Resources)

  • 박정민
    • 통합자연과학논문집
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    • 제16권4호
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    • pp.139-145
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    • 2023
  • Due to changes in the distribution system and increased demand for renewable energy, interest in technology to increase the limit capacity of distributed energy grid connection using grid flexible resources is also increasing. Recently, the distribution system system is changing due to the increase in distributed power from renewable energy, and as a result, problems with the limited capacity of the distribution system, such as waiting for renewable energy to connect and increased overload, are occurring. According to the power generation facility status report provided by the Korea Power Exchange, of the total power generation capacity of 134,020 MW as of 2021, power generation capacity through new and renewable energy facilities is 24,855 MW, accounting for approximately 19%, and among them, power generation through solar power accounts for a total portion of the total. It was analyzed that the proportion of solar power generation facilities was high, accounting for 75%. In the future, the proportion of new and renewable energy power generation facilities is expected to increase, and accordingly, an efficient operation plan for the distribution system is needed. Advanced country-type NWAs that can integrate the operation and management of load characteristics for each line of the distribution system, power distribution, regional characteristics, and economic feasibility of distributed power in order to improve distribution network use efficiency without expanding distribution facilities due to the expansion of renewable energy. An integrated operating system is needed. In this study, in order to improve the efficiency of distribution network use without expanding distribution facilities due to the expansion of renewable energy, we developed a method that can integrate the operation and management of load characteristics for each line of the distribution system, power distribution, regional characteristics, and economic feasibility of distributed power. We want to develop an integrated operation system for NWAs similar to that of advanced countries.