• 제목/요약/키워드: Distribution network control

검색결과 460건 처리시간 0.026초

Feeder Loop Line Control for the Voltage Stabilization of Distribution Network with Distributed Generators

  • Jeong, Bong-Sang;Chun, Yeong-Han
    • Journal of Electrical Engineering and Technology
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    • 제9권1호
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    • pp.1-5
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    • 2014
  • When renewable sources are connected to the distribution network in the form of a distributed generators(DGs), the effect of intermittent output appears as voltage fluctuation. The surplus power at the consumer ends results in the reverse power flow to the distribution network. This reverse power flow causes several problems to the distribution network such as overvoltage. Application of the reactive power control equipment and power flow control by means of BTB inverter have been suggested as the general solutions to overcome the overvoltage, but they are not economically feasible since they require high cost devices. Herein, we suggest the feeder loop line switch control method to solve the problem.

오리피스를 이용한 엔진 윤활시스템 유량분배 제어 (Oil Flow Distribution Control of Engine Lubrication System Using Orifice Component)

  • 윤정의
    • Tribology and Lubricants
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    • 제22권1호
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    • pp.47-52
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    • 2006
  • It is very important to control pressure and flow rate distribution on each component of engine lubrication network. Sometimes many kinds of orifice are used to control flow rate in the hydraulic lubrication field. In this study orifices were adopted on the lubrication network to control oil flow rate distribution. And unsteady transient flow network analysis was carried out to find out the effects of orifices on the engine oil circuit system.

A Comparison of the performance of mean, median, and precedence control charts for nonnormal data

  • Kim, Jung-Hee;Lee, Sung-Im;Park, Heon-Jin;Lee, Jae-Cheol;Jang, Young-Chul
    • 한국통계학회:학술대회논문집
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    • 한국통계학회 2005년도 춘계 학술발표회 논문집
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    • pp.197-201
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    • 2005
  • In this article, we will compare the performance of the mean control chart, the median control chart, the transformed mean control chart, the transformed median control chart, and the precedence control chart by simulation study. For control charts with transformed data, Yeo-Johnson transformation is used. Under the in-control condition, ARL's in all control charts coincide with the designed ARL in the normal distribution, but in the other distributions, only the precedence control chart provides the in-control ARL as designed. Under the out-of-control condition, the mean control chart is preferred in the normal distribution and the median control chart is preferred in the heavy-tailed distribution and the precedence control chart outperforms in the short-tailed distribution.

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CAN 통신을 이용한 IPDM(intelligence power distribution module) 개발 (Development of Intelligence Power Distribution Module with Control Area Network)

  • 이두길;고국원;고경철
    • 한국정밀공학회:학술대회논문집
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    • 한국정밀공학회 2006년도 춘계학술대회 논문집
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    • pp.37-38
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    • 2006
  • In this paper, power distribution module for car relay control with Control area network is developed. This module is called Intelligent power distribution module because it has microprossor which can communicate with other electric module such as ECU and Body control module and also has self-diagonasis function. The developed IPDM module is tested on vehicle and the good performance has been achieved.

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신경회로망을 이용한 열성층 풍동내의 온도 분포 제어 (Control of temperature distribution in a thermal stratified tunnel by using neural networks)

  • 부광석;김경천
    • 제어로봇시스템학회:학술대회논문집
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    • 제어로봇시스템학회 1996년도 한국자동제어학술회의논문집(국내학술편); 포항공과대학교, 포항; 24-26 Oct. 1996
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    • pp.147-150
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    • 1996
  • This paper describes controller design and implementation method for controlling the temperature distribution in a thermal stratified wind tunnel(TSWT) by using a neural network algorithm. It is impossible to derive a mathematical model of the relation between heat inputs and temperature outputs in the test section of the TSWT governed by a nonlinear turbulent flow. Thus inverse neural network models with a multi layer perceptron structure are used in a feedforward control loop and feedback control loop to generate an arbitrary temperature distribution in the test section of the TSWT.

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효율적인 배전관리를 위한 컴퓨터 응용 프로그램 연구 (A Study on Computer Application Program to an Efficient Supervisory Control of the Power Distribution System)

  • 이병철;서영노;이진혁;정진현
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 1993년도 하계학술대회 논문집 A
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    • pp.96-98
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    • 1993
  • In accordance with increase of electrical power demanded, more efficient supervisory control of distribution system is required. This study contains development of MMI(man-machine-interface) system with GUI(graphic-user-interface), for the automatic power distribution system. The main function of MMI system are to edit network of power distribution, to view network, to warnning a breakdown and to management of data base for network. The GUI function of MMI system enables more efficient management of power distribution system.

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시스템 성능 지수 및 동적 전력분산 제어를 통한 무선센서를 이용한 에어컨 네트워크 시스템의 성능 개선 (Performance Improvement of Air Conditioner Network System using Wireless Sensors Through System Performance Index and Dynamic Power Distribution Control)

  • 최호식;권우현;윤병근
    • 센서학회지
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    • 제28권1호
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    • pp.64-70
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    • 2019
  • Wireless sensors have been developed in numerous ways for enhancing the convenience of installation, management and maintenance of sensors. Energy harvesting wireless sensors, which can collect energy from the external environment for permanent usage without the need of recharging and exchanging batteries, have been developed and employed used in Internet of Things and at various industrial sites. Energy harvesting wireless sensors are significantly affected by the sensor lifespan to sudden variation in the external environment. Furthermore, reduction in the sensor operating timespan can greatly affect the characteristics of the devices connected through a network. In this paper, a system performance index is proposed that can comprehensively evaluate the lifespan of a solar cell wireless sensor, determine the characteristics of devices connected to the associated network, and recommend dynamic power distribution control for improving the system performance index. Improvement in the system performance index was verified by applying the proposed dynamic power distribution control to an air conditioner network system using a solar cell wireless sensor. Obtained results corroborate that the dynamic power distribution control can extend the lifespan of the incorporated wireless sensor and reduce the air conditioner's power consumption.

지역통합 네트워크관리하의 재고통제 운용전략에 관한 연구 (An Operational Strategy for Inventory Control of Networked Regional Distribution Centers)

  • 김병찬;최진영
    • 산업경영시스템학회지
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    • 제31권3호
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    • pp.110-116
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    • 2008
  • Operational strategy for inventory control in the distribution system has been given attention. If an individual enterprise implements the strategy, it is not easy to gain scale merits because of limited quantity or burden of inventory. In this study, we propose an operational strategy for inventory control that considers managerial integration of regional distribution centers (RDCs) and present a model of it. In a network of several RDCs, they could share inventory information and supply parts for others in case of an inventory shortage. And a numerical example of the network is illustrated, which compares two operational strategies, integration management of RDCs and individual management of them. The result shows total cost reduction in the strategy of integration management through the efficient inventory control of multi-echelon distribution.

가상화된 WLAN 환경에서 트래픽 변화를 고려한 SDN 기반 대역폭 제어 기법 (An SDN-based Bandwidth Control Scheme considering Traffic Variation in the Virtualized WLAN Environment)

  • 문재원;정상화
    • 정보과학회 논문지
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    • 제43권11호
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    • pp.1223-1232
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    • 2016
  • 가상 네트워크 기술은 다양한 서비스의 요구조건을 반영한 네트워크를 제공할 수 있다. 다양한 서비스의 요구조건을 반영하기 위해 효율적인 리소스 분배 기술이 필요하다. 기존의 트래픽 대역폭 분배 기법들은 다운링크 트래픽만 제어하거나 네트워크의 트래픽 상황을 고려하지 않는다. 무선 네트워크에서 다운링크와 업링크는 같은 자원을 공유한다. 또한, 기존의 트래픽 대역폭 분배 기법들은 모든 스테이션이 포화된 트래픽을 발생시킨다고 가정한다. 그래서 기존의 트래픽 대역폭 분배 기법들은 가상 무선 네트워크에서 트래픽 제어를 할 수 없다. 본 논문에서는 이러한 문제들을 해결하기 위해 트래픽 기반 대역폭 제어 기법을 제안한다. 가상 네트워크에 SDN을 적용하고 각 스테이션의 트래픽을 모니터링하고 비포화 트래픽을 발생시키는 스테이션을 탐색한다. 또한, 모니터링 정보를 기반으로 업링크와 다운링크 트래픽을 동적으로 제어한다. 실제 테스트베드 구성 후, 기존의 기법과 비교 결과, 트래픽 대역폭 분배 성능이 최대 14% 개선되었다.

효율적인 배전관리를 위한 컴퓨터 응용연구 (A study on the computer application for efficient management of the power distribution system)

  • 이병철;서영노;정진현;고윤석;김호용
    • 제어로봇시스템학회:학술대회논문집
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    • 제어로봇시스템학회 1993년도 한국자동제어학술회의논문집(국내학술편); Seoul National University, Seoul; 20-22 Oct. 1993
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    • pp.975-980
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    • 1993
  • In accordance with increase, if electronic power demanded, more efficient supervisory control of distribution system will be required. This study contains development of MMI(man-machine-interface) system with GUI(graphic-user-interface), for the automatic power distribution system. The main function of MMI system is to edit network of power distribution and to management of data base for network. The GUI function of MMI system enables more efficient management of power distribution system.

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