• Proceedings of the KIEE Conference
• /
• 2009.07a
• /
• pp.159_160
• /
• 2009

In this paper proposes a new algorithm of efficiency outage restoration using a outage load switching to a healthy MTR a fault occurrence at a MTR. In addtion, proposed algorithm includes a outage restoration method which keeps MTR optimal capacity with reorganization of distribution network in case it can not restore outage state loads caused by shortage of healthy MTR remain capacity. In case that proposed sequence still can not complete restoration, this paper suggests a efficiency outage restoration with objective function included priority in outage loads.

• Proceedings of the KIEE Conference
• /
• 2008.07a
• /
• pp.195-196
• /
• 2008

Output of wind generators are changed by windy level. The change of the output also affects the amplitude of fault current. And this fault current causes OCR's mal-operation. To solve the problem, this paper adopts that Over Current Relay adapted for Decentralized generator algorithm.

• Proceedings of the KIEE Conference
• /
• 2008.07a
• /
• pp.215-216
• /
• 2008

병합 장치(Merging unit)는 계전용 IED로 측정된 전압 및 전류의 값을 A/D 변환한 샘플 값(Sampled values)을 전송하는 IED로써 실시간으로 통신을 하여야 하는 측면에서 해결해야 할 많은 요소를 가지고 있다. 본 논문에서는 병합 장치를 구현하면서 실시간으로 샘플 값을 전송하는 방법에 관한 고려해야 할 전송 요구사항, 네트워크 시간 지연, 네트워크 과부하 현상 등의 문제점들에 대해 실시간 통신 방안을 설명하였다.

• Proceedings of the KIEE Conference
• /
• 2002.11b
• /
• pp.253-255
• /
• 2002

The paper presets the improvements of MMI at the PROSET2000 correction program which is totally computerized system of the power system protection. The Base Form that is an open interface is developed to be able to compose the screen by reading the input screen from the database. It also is developed to be suitable for the environment of the Graphical User Interface instead of the DOS window when the users do the pannel settings. Program development in this paper is designed by Unified Modeling Language(UML) techniques.

• Proceedings of the KIEE Conference
• /
• 2003.07a
• /
• pp.299-301
• /
• 2003

In this paper, a protection system using Multi-Agent concept for power distribution network is proposed. Multi agent system consist of Feeder agent, OCR(Over Current Relay) agent, Recloser agent and Switch agent. An agent calculates and corrects its parameter by itself through communication with neighboring agents and its own intelligence algorithm. Simulations in a simple distribution network show the effectiveness of the suggested protection system. Multi-Agent System, protection of distribution network, Communication.

• Proceedings of the KIEE Conference
• /
• 2003.07a
• /
• pp.326-328
• /
• 2003

In this paper, in order to generator protection from a electrical fault was occurred while a generator is operated, principles of existing generator protection algorithm is examined and analyzed. and a new generator protection algorithm was developed. also, during a generator operation, Algorithm, an analysis for the basic principle of protective relay to general faults, was developed. This paper, generator was simple analyzed on the assumption that three-phase winding and observe the IEEE std.

• Proceedings of the KIEE Conference
• /
• 2003.07a
• /
• pp.329-331
• /
• 2003

PROSET2000 that is integrated protective management system had developed and used in order to automate the setting process of protective relays in transmission system protection. PROSET2000 have database for relay setting and automated for relay setting program within. This paper proposed PCM current differential relay setting program point of Object Oriented Programming paradigm using Unified Modeling Language about additional relay in PROSET2000. Nevertheless each relay uses same current differential but setting method is different. This paper discribed different thing about setting method of each relay and evaluated more effective and corrective relay setting program using UML.

• Proceedings of the KIEE Conference
• /
• 2003.07a
• /
• pp.151-153
• /
• 2003

This paper was studied on using data of the protective relay by Power Quality Monitor. The protective relay will have problem to save data for PQM(Power Qualify Monitoring) analysis because the protective relay memory is limited. So this paper was proposed new data compression of the data was get from the protective relay. The scheme is compared each cycle after DFT(Discrete Fourier Transform). And scheme is verified through simulation of protective relay data was from real distribution system.

• Proceedings of the KIEE Conference
• /
• 2003.11a
• /
• pp.171-173
• /
• 2003

This paper presents a new fault location algorithm for 3 phase underground cable based on distributed parameter circuit analysis, by which we establish the basic equations for each of core and sheath currents and voltages considering cross-bonding sheaths. The proposed algorithm need simulate by EMTP, and then the EMTP data need be compared with the calculation result in Matlab.

• Proceedings of the KIEE Conference
• /
• 2006.11a
• /
• pp.6-8
• /
• 2006

변전소 자동화 시스템에서 IED(Intelligent Electronic Device)들 간의 효과적인 통신을 위해 표준프로토콜인 IEC-61850이 제시되면서 이를 구현하고 응용하기 위한 관심이 높아지고 있다. 본 논문은 IEC-61850 표준규격을 분석하여 제시된, 거리 계전 IED 모델을 이용해 송전선 보호 IED를 구현하였다. 통신기능 구현은 리눅스 커널 2.6 기반의 통신보드를 사용하였고 계전 알고리즘의 수행은 TMS320C32 기반의 DSP(Digital Signal Processor) 보드를 사용하였다. 보드간 통신은 CAN(Cont roller Area Network) 통신으로 이루어 졌으며 사례연구를 위해 RTDS(Real Time Digital Power System Simulator)를 이용하여 입력신호를 생성하였다. 구성된 시스템의 검증을 위해 거리계전기에서 후비보호 시 발생할 수 있는 문제점을 시뮬레이션 하였다.