• Proceedings of the KIEE Conference
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• 2015.07a
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• pp.559-560
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• 2015

본 논문에서는 송전선로재폐로에 대한 개념과 방식 및 전압별 재폐로 적용사례를 소개하고 345kV 송전선로보호반에 적용하고 있는 재폐로시스템과 현재 재페로시스템 검증시험법에 대한 소개와 본 논문에서 소개하고자 하는 재폐로시스템 검증장치를 기존방법과 비교하여 본 장치를 사용함으로써 얻을 수 있는 장점에 대해 서술하였다.

• Proceedings of the KIEE Conference
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• 1995.07b
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• pp.613-615
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• 1995

KEPCO is now going on upgrading the highest system voltage from 345kV to 765kV since 1992. The main reason of this 765kV project is the bulk power transmission from the power generation sites at the East and West coasts to the Kyeong-in area. The first 765kV transmission lines will be constructed by 1998 and operated as 345kV level until 2001. This system needs a detailed evaluation of the 2nd arc in case of 765kV transmission line outages and the countermeasures for the fast arc reduction for the successful high speed reclosing. So, this paper deals with the simulation results of the 2nd arc characteristics using EMTP and comparison of Sh.R and HSGS for the reduction methods.

• Proceedings of the KIEE Conference
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• 2008.11a
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• pp.323-324
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• 2008

전력계통 운영업무를 담당하고 있는 전력거래소는 계통운영방안 수립시 상정고장을 대비한 과도한 과부하 방지 또는 고장용량 초과 해소, 계통안정도 향상방법으로 변전소 모선분리 또는 승전선로 개방, 고장파급방지시스템 등을 적응하긴 있으며, 특히 인천지역에는 많은 발전기가 집중되어 있기 때문에 차단기 고장전류 해소를 위하여 345kV 인천T/P 등 여러 변전소를 모선 분리하여 운영하고 있다. 본 논문에서는 인천화력T/L이 자연재해로 인한 철탑이 도피되어 인천화력#1,2T/L 2회선 정지 및, 1회선 가복구 후 인천화력T/L회선으로 인천지역 및 경인지역 전력계통을 안정적으로 운영하기 위한 방안을 수립하여 계통운영업무 종사자에게 계통운영의 중요성을 보여주고자 한다.

• Proceedings of the KIEE Conference
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• 2000.07c
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• pp.1843-1845
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• 2000

GIS(Gas insulated switchgear)내부에서 발생한 부분방전 신호를 검출 할 수 있는 UHF(Ultra-high frequency) 부분방전 검출 센서를 345 kV GIS의 AC 내전압 시험에 적용하였다. 부분방전 센서를 적용한 상태에서 각 상별로, bus별로 나누어 계통 최고전압의 1.0 p.u, 1.5 p.u, 1.73 p.u 전압을 단계적으로 인가하였으며 간헐적으로 부분방전 신호가 검출됨을 확인하였다. 간헐적인 부분방전 신호는 GIS 내부에 있던 이물질에서 약한 방전이 시작되고 인가전압을 높임에 따라 방전의 강도가 증가하다 소멸되었다. 방전을 일으킨 이물질이 모두 증발되었거나 위치 변화에 의해 방전이 소멸된 것으로 판단된다.

• Proceedings of the KIEE Conference
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• 2003.11a
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• pp.364-366
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• 2003

345kV XLPE Cable system was constructed between Yeongseo-Yeongdeunpo at first in Korea. XLPE cable have the advantage of OF cable. it is to raise the power transmission capacity and reduce the power loss and expenses. We also applied many new technology in this project at first. One is pre-fabricated joint which can be easily assembled in the field without any hand-skill, another is PD(Partial Discharge) test for after laying test. Especially, PD measurement for after-laying test was performed to evaluate the quality of the cable joint and termination. Through the good experience of this project, we have gotten the international competitiveness of power business.

• Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference
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• 2009.05a
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• pp.428-431
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• 2009

KPX sets up the voltage standards according to the voltage level to supply a good quality of electricity to customers. Supply voltages are divided into 4 levels - 345kV, 154kV, 22.9kV, and distribution voltage consisting of 110, 220 and 380V. In this research, we examine the optimal voltage operating level focused on 154kV system that mostly affects electricity quality, through analysing the system demand.

• Proceedings of the KIEE Conference
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• 1997.07e
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• pp.1731-1733
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• 1997

The first 150lkV underground transmission line of Korea was installed between Danginri and Yongsan substation in 1974. Since then, the underground transmission lines of about 720 circuit-km had been installed up to 1995. As the national economy has been enlarged and the population of city has been rapidly increased, the demand of an electric power has been very increased. Therefore the first 345kV long-length transmission line of Korea was installed between Mikyum and Sungdong substation on Jan., 1997. This paper describes the design of the 345kV oil-filled cable and its accessories, the design of the system, the methods of installation, field tests, and the future trends of the underground transmission line in Korea.

• Proceedings of the KIEE Conference
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• summer
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• pp.24-26
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• 2004

The growing demand for electricity has result in a corresponding increase in power generated and transmitted. As the increase in installed capacity of power system, the fault currents of 345kv system will be increased beyond the interrupting duty of the circuit breakers. The current limiting reactors are used to limit the fault current. The paper presents the result of the transient stability and voltage stability due to install 345kV current limiting reactor to suppress the fault currents.

• Proceedings of the KIEE Conference
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• 2005.11b
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• pp.189-191
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• 2005

In the past, dramatic economical development of Korea could be achieved by well-organized 154kV power system network. Electric power Is a key Industry for the nation and industrial development. Nowadays we operates 345kV Power system with based transmission network and also we are operating 765kV power system to supply to the capital region. Currently developing countries in Southeast Asia are requiring the electric power technology to Korea so that they can acquire the source of the development-power system network. Therefore, it Is important to design transmission line and substation with appropriate methods. In this paper, a calculation and calculating process of shielding range using shield wires in Myanmar 500kV substation are reviewed according to the Myanmar 500kV power system project performed by the overseas projects section of the Korea Electric Power Corporation.

• Proceedings of the KIEE Conference
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• 2003.07c
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• pp.1815-1817
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• 2003

Since the first underground transmission line in Korea was installed in 1974, the two types of underground transmission power cables, oil-filled and XLPE, have been applied for underground transmission lines. As the manufacturing technologies of XLPE cable have been improved and the simplicity of installation and maintenance has been focused on, the installations of XLPE cables have been largely increased since the mid 1990's. For the first time, in Korea, the 345kV XLPE cable was installed at Pyungtaek thermal power plant in 2003, February. So, this paper introduces the project profile, the design of cable and its accessory, the cable system design, installation and site test.