• International Journal of Aerospace System Engineering
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• 제4권1호
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• pp.1-8
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• 2017

This paper proposes the load distribution control allocation technique. The proposed method is designed by combining a conventional control allocation method with load distribution ability in order to reduce the stress acting on ailerons. By designing the weighting matrix as a function of the load distribution rule, the optimal deflection angles of each surface to satisfy both control goal and load distribution can be achieved. Moreover, rule based fault-tolerant control technique is also proposed. The rules are generated by considering both dominant control surfaces and the ratio of load distribution among surfaces. The performance of the proposed method is evaluated through numerical simulations.

• 전기학회논문지
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• 제64권8호
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• pp.1161-1167
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• 2015

Distribution Management System(DMS) ienhancing distribution automation system-based operation efficiency is an optimized system by various operational applications in a distribution network. DMS employs various applications like topology reconfiguration, volt/var control, and restoration at events such as overload, voltage violation, and a fault in a distribution system. An operation efficiency to employ multi-applications as restoration with short-term load forecasting is higher than a performance by a single application; and the applications are accomplished by an operator’s control. Applications’ combination is determined by various alarm information which means critical issues in order to operate a distribution system. Thus, this paper proposes an application management system which can configure application combination, control applications depending on alarm information and check their performance condition. The proposed application management system can be customized by operator easily and have high operation efficiency and reliability because it is worked by reviewed alarm information from operator.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2003년도 하계학술대회 논문집 A
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• pp.427-429
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• 2003

The reliability performance of distribution networks will be enhanced with the installation of application programs including feeder reconfiguration program for loss minimization and optimization of system capacity. Although the basic functions of remote monitoring and remote control provide no measurable cost benefit the suite of application programs developed and now being commissioned by KEPCO, the future will continue to offer this utility with substantial savings in system operational costs, improve system reliability and customer service.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1996년도 하계학술대회 논문집 B
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• pp.800-803
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• 1996

This paper proposes the algorithm to solve emergency service restoration problems using efficient reconfiguration method in distribution system. In this algorithm, we try to avoid the blackout of important loads by considering service rank. It is possible to reconfigurate the system by using fuzzy inference results in which was reflected the expected distribution power, line capacity and service rank. A 27-bus, 32-branch model system is used to demonstrate the effectiveness of the proposed algorithm.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2005년도 제36회 하계학술대회 논문집 A
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• pp.554-556
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• 2005

Distribution Automation System (DAS) will provide supervision and remote control of switches and reclosers such as pole pounted switches and pad-mounted switchgears on high voltage distribution line. Kepco had developed basic function such as remote monitoring, remote control, remote measuring and remote setting at first. As a next step, Kepco has been developed diverse application programs such as single line diagram drawing program, relay coordination program, feeder reconfiguration program, over load elimination program, bad data detection program, section load management program, fault processing program and so on. Kepco is examining to develop more powerful functions for special specification of foreign distribution automation system. This paper explains what is the target for overseas DAS market.

• 대한전기학회논문지:전력기술부문A
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• 제55권10호
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• pp.410-417
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• 2006

Generally, the training set of maximum $m{\times}L(m+f)$ patterns in the pattern recognition method is required for the real-time bus reconfiguration strategy when a main transformer fault occurs in the distribution substation. Accordingly, to make the application of pattern recognition method possible, the size of the training set must be reduced as efficient level. This Paper proposes a methodology which obtains the minimized training set by applying the pattern clustering method to load patterns of the main transformers and feeders during selected period and to obtain bus reconfiguration strategy based on it. The MaxMin distance clustering algorithm is adopted as the pattern clustering method. The proposed method reduces greatly the number of load patterns to be trained and obtain the satisfactory pattern matching success rate because that it generates the typical pattern clusters by appling the pattern clustering method to load patterns of the main transformers and feeders during selected period. The proposed strategy is designed and implemented in Visual C++ MFC. Finally, availability and accuracy of the proposed methodology and the design is verified from diversity simulation reviews for typical distribution substation.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1998년도 하계학술대회 논문집 C
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• pp.841-843
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• 1998

The second project of the development of distribution automation system was started recently in Korea. We will use two algorithms for feeder automation in this project. The one is Yes/No logic and it will be applied in large city. Yes/No logic determined the faulty section by fault current following information of the fault indicators of each switches. The other is automatic closing process of switches, and it will be applied in rural area. In the latter method, each switches close systematically, and it can find and separate the faulty section, the computer system treats only the feeder reconfiguration finally.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2007년도 제38회 하계학술대회
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• pp.29-30
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• 2007

본 논문에서는 배전계통의 정상상태 운용 목적중 하나인 부하의 균등 배분에 관하여 연구하였다. 배전계통의 재구성이라 함은 위의 목적식에 따라 시스템 내에 존재하는 개폐기의 On/Off 상태를 변경하여 구성을 바꾸는 것이다. 이를 통하여 해당 전력계통의 부하가 평준화 되는 것을 보이도록 한다. 또한, 부하의 균등 배분이라는 목적으로 계통을 재구성한 결과와 손실의 최소화를 목적으로 재구성한 결과를 비교하여 보다 효율적인 방법을 제안하고, 그 해가 지역해에 빠지지 않고, 좀 더 빠른 시간에 최적해에 도달할 수 있는 방안을 구현하고자 한다.

• 조명전기설비학회논문지
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• 제17권5호
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• pp.80-87
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• 2003

본 논문은 경험적인 탐색방법인 Reactive Tabu Search를 배전계통의 최적 재구성에 적용하였다. 일반적으로 Tabu search는 기울기가 감소하는 방향으로 탐색을 하기 때문에 적은 계산 시간으로 좋은 해를 얻을 수 있지만 초기의 계통 구성에 따라 수렴의 특성이 좌우되어 전역적인 최소해를 찾기가 어려운 단점이 있다 반면 RTS(Reactive Tabu search)는 reaction과 escape 메커니즘을 제공함으로써 파라미터 선정을 자동적으로 적응시키는 것이 가능하여 계통의 초기 구성에 관계 없이 전역적인 해를 적은 계산량으로도 찾을 수 있다. 렬 연구에서는 RTS의 reaction과 escape메커니즘 구현을 위하여 해싱 함수를 이용하였고 또한 제시된 방식을 32모선에 적용, 기존의 참고문헌과 비교함으로써 그 유용성을 입증하였다.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1993년도 하계학술대회 논문집 A
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• pp.195-197
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• 1993

This raper describes a nev program designed as a part of the integrated software package for distribution system planning and operation. The program accesses electrical map databases which include both electrical and geographical information. Data retrieval, load flow analyses, and reconfiguration studies can be easily performed in highly interactive environment on graphics and pull down menus, case study results demonstrate the practical usefulness of the program at the real systems.