• 제목/요약/키워드: Automatic Distribution System

검색결과 355건 처리시간 0.032초

정전비용과 신뢰도 분석을 통한 분할 개폐기의 적정 자동화율 도출 알고리즘에 관한 연구 (Study on the algorithm for the Reasonable Switch Automation Rate with Customer Interruption Cost and Reliability Evaluation)

  • 채희석;신희상;조성민;문종필;김재철
    • 전기학회논문지
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    • 제62권4호
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    • pp.467-473
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    • 2013
  • The addition of disconnect switches to a distribution feeder or the replacement of the manual switches with the automatic switches do, in general, increase reliability by decreasing the duration of the outage of many to the customers on the feeder and reducing the outage section. However, the improvement of reliability in power distribution system causes an increase of the investment cost, for example, replacement costs, labor costs, and so on. For this reason - the balance between investment and reliability improvement - many studies about the appropriate level of investment have been conducted. In this paper, we suggest the algorithm for determining the reasonable switch automation rate in the power distribution system. We evaluate the customer interruption cost and reliability for several cases - these cases relate with the switch automation rate - in the domestic metropolitan power distribution system, estimate the effectiveness of changing the manual switch to automatic switch quantitatively. These results can help the determining on the disconnect switch's automation rate.

수용가 자동원방검침 및 부하집중제어 시스템 현장 실증시험연구 (A study on field trial system for automatic meter reading and load control system)

  • 이원빈;문홍석;김석구;양완식
    • 제어로봇시스템학회:학술대회논문집
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    • 제어로봇시스템학회 1988년도 한국자동제어학술회의논문집(국내학술편); 한국전력공사연수원, 서울; 21-22 Oct. 1988
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    • pp.663-668
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    • 1988
  • A study on Automatic Meter Reading and Load Control System used to Distribution Line Carrer has started since 1986, and the field trial system for AMR and LCS was installed to KEPCO on June, 1988. Now this system will be operated for testing. This paper will describe project and planning for field trial of KEPCO.

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Vessel traffic geometric probability approaches with AIS data in active shipping lane for subsea pipeline quantitative risk assessment against third-party impact

  • Tanujaya, Vincent Alvin;Tawekal, Ricky Lukman;Ilman, Eko Charnius
    • Ocean Systems Engineering
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    • 제12권3호
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    • pp.267-284
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    • 2022
  • A subsea pipeline designed across active shipping lane prones to failure against external interferences such as anchorage activities, hence risk assessment is essential. It requires quantifying the geometric probability derived from ship traffic distribution based on Automatic Identification System (AIS) data. The actual probability density function from historical vessel traffic data is ideal, as for rapid assessment, conceptual study, when the AIS data is scarce or when the local vessels traffic are not utilised with AIS. Recommended practices suggest the probability distribution is assumed as a single peak Gaussian. This study compares several fitted Gaussian distributions and Monte Carlo simulation based on actual ship traffic data in main ship direction in an active shipping lane across a subsea pipeline. The results shows that a Gaussian distribution with five peaks is required to represent the ship traffic data, providing an error of 0.23%, while a single peak Gaussian distribution and the Monte Carlo simulation with one hundred million realisation provide an error of 1.32% and 0.79% respectively. Thus, it can be concluded that the multi-peak Gaussian distribution can represent the actual ship traffic distribution in the main direction, but it is less representative for ship traffic distribution in other direction. The geometric probability is utilised in a quantitative risk assessment (QRA) for subsea pipeline against vessel anchor dropping and dragging and vessel sinking.

The Inter-tie Protection Schemes of the Utility Interactive Dispersed Generation Units for Distribution Automatic Reclosing

  • Park, Joon-Ho;Kim, Jae-Chul;Moon, Seung-Il
    • KIEE International Transactions on Power Engineering
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    • 제2A권4호
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    • pp.166-173
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    • 2002
  • Dispersed Generation (DG) units significantly effect the existing distribution protection practices. Therefore, new protection practices of the distribution system interconnected with DG units should be reevaluated and developed. In this paper, a new inter-tie protection scheme of DG units for distribution automatic reclosing is proposed. The impact of DG units on existing radial-sectionaliser coordination is analyzed. And the effects of the distribution reclosing type (radial and passive reclosing) on DG dynamics are analyzed and classified. From the results of the DG dynamic responses by the reclosing type, i.e. radial and passive reclosing, the inter-tie protection schemes of DG are introduced to improve the reliability and availability of utility interactive DG. The proposed schemes are proved and evaluated by a case study using PSCAD/EMTDC simulation.

동적계획법을 이용한 발전기의 운전모드 및 최적부하 배분에 관한 연구 (A Study on Optimal Electric Load Distribution and Generator Operating Mode Using Dynamic Programming)

  • H-H Yoo
    • Journal of Advanced Marine Engineering and Technology
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    • 제26권3호
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    • pp.313-319
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    • 2002
  • Since the oil crisis in 1970, a great deal of effort has been made to develop automatic electric load sharing systems as a part of the efforts to save energy. A large scale electric generating system composes more than two generators whose characteristics may be different. When such a system is operated individually or in parallel, the lagrange multiplier's method has difficulty in achieving optimal load distribution because generators usually have the limitations of the operating range with inequality constraints. Therefore, a suitable operating mode of generators has to be decided according to the selection of the generators to meet electric power requirements at the minimum cost. In this study, a method which solves the optimal electric load distribution problem using the dynamic programming technique is proposed. This study also shows that the dynamic programming method has an advantage in dealing with the optimal load distribution problem under the limitations of the operating range with inequality constraints including generator operation mode. In this study, generator operating cost curve of second order equation by shop trial test results of diesel generators are used. The results indicate that the proposed method can be applied to the ship's electric generating system.

배전선로 변대주 원격자동 접지측정장치 설계 (Design of a Remote Automatic Earth Tester at Electric Pole in a Distribution Line)

  • 윤기갑;윤석무;이승학;김홍필;최상준
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 2000년도 하계학술대회 논문집 A
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    • pp.498-500
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    • 2000
  • Generally, the earth resistance of distribution lines are measured under the condition of the climbing pole. This paper proposed the design technique of a new concept type remotoe automatic measuring system without climbing electric distribution poles. The worker on the earth under pole, can measure by using the CT on the located at the top of COS operating Stick. The system is useful for safety of worker, and saving mans, times for measuring.

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지중배전계통 공급방식의 공급신뢰도 평가 기법 (A Study on the Reliability Evaluation of Underground Distribution System)

  • 최상봉;김대경;정성환
    • 대한전기학회논문지:전력기술부문A
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    • 제50권7호
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    • pp.309-317
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    • 2001
  • The objective of this study is to evaluate properly reliability of underground distribution system taking into account domestic circumstance. Interruption time and number of interruption customer by distribution system based on actual condition in domestic utility are considered as important index to estimate reliability of underground distribution system. This paper presents algorithm to evaluate reliability of underground distribution system by using a model system as new urban area. Evaluation results which is established are shown in detail according to whether automatic system is introduced or not.

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Vision System을 이용한 자동화 물류 창고 시스템의 개발에 관한 연구 (A study of automatic physical distribution processing system Using Vision System)

  • 황영민;우정인
    • 전력전자학회:학술대회논문집
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    • 전력전자학회 2005년도 전력전자학술대회 논문집
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    • pp.146-148
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    • 2005
  • According as the industry develops recently, the import and export freight amount is increasing sharply, but physical distribution processing equipment ability had achieved conveyance, surge and setup of physical distribution by human's labor ability. But, inefficiency is indicated in operation of harbor and bay warehouse or physical distribution storage equipment because is ceilinged the processing physical distribution amount and the efficiency in physical distribution processing by these labor ability. Treatise that meet on the request proposes soldier warehouse physical distribution processing system that apply Vision System.

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Evolution of Automatic Ordering System in Retail Market : Analyzing Inventory Data

  • Paik, SiHyun;Frazier, DeWayne P.;Mark, Isenhoff
    • International Journal of Advanced Culture Technology
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    • 제3권2호
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    • pp.1-14
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    • 2015
  • The purpose of this paper is to reveal two problems in the existing inventory systems in retail market, and to suggest a Two-Bin System under Automatic Ordering System considering only base-stock. Large retailers already have a sophisticated inventory system based on an automatic ordering principle. However, why does the out-of-stock (OOS) happen in large discount stores in spite of having a good inventory system? This paper suggests two systems after finding the root causes concerning the previous question. For evaluating the performance of each system, the random 200 data set in each sample group was generated from MINITAB 16 and obeyed the Poisson distribution. The existing inventory system in retail market cannot help generating OOS due to indwelling contradiction in itself. The reasons are the ordering deadline and the relationship between ordering quantity and base stock. This paper also demonstrates that these previous studies on inventory fall into the closed loop. Also the paper shows that the performance of the replenishment policy was better than traditional methods dealing with ordering quantity and base stock.

종합배전자동화 시스템의 구성 (The Configuration of Total Distribution Automatic System)

  • 정미애;하복남;설일호;강문호;이흥호
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 2004년도 하계학술대회 논문집 A
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    • pp.572-574
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    • 2004
  • The configuration of Distribution Automatic System(BAS) is dual servers and raid 5(redundant arrays of inexpensive disks) clustering dual HDD. The DAS has the distributed object-oriented architecture using middleware software(BASEstar), so the number of client nodes has no limitation. Because the DAS is scalable, it can be configured using various application programs and be upgraded easily. The DAS has competitive to export because there are system development and accumulation of technology that coincide in International Standard, using common 05 and DB. This paper describes the structure of DAS hardware and software separately and proposes to improve program to share real time DB efficiently at each node.

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