• 전기의세계
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• v.65 no.6
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• pp.8-11
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• 2016

• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.14 no.2
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• pp.8-17
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• 2000

In this work, two approaches were proposed for the recognition of partial discharge patterns. The first approach was neural network with backpropagation algorithm, and the second approach was angle calculation between t재 operator vectors. PD signals were detected using three electrode systems; IEC(b), needle-plane and CIGRE method II electrode system. Both of neural network and angle comparison method showed good recognition performance for the patterns similar to the trained patterns. And the number of operators to be used had a great influence on the recognition performance to the untrained patterns.

• 전기의세계
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• v.14 no.2
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• pp.50-52
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• 1965

본 고에서는 연속부하의 전류용량 산출 방법에 대하여 보고서가 완성되었고 금후 cyclic load의 경우 및 transient load의 경우에 대하여 산출 방법의 표준작성이 착수되고 있다는 보고가 있었다. 또 cable의 축방향으로 열저항이 변하는 경우의 산출방법에 대하여도 자료가 제출되었다.

• 전기의세계
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• v.42 no.2
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• pp.60-68
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• 1993

본 Report는 345KV 반합성지 (PPL) 절연 SELF CONTANED OIL FILLED CABLE 개발에 대해 1992년 8월 30일-9월 5일에 프랑스 파리에서 개최된 제34차 CIGRE 대회에서 발표된 내용을 재 정리한 것이다.

• 전기의세계
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• v.41 no.5
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• pp.47-53
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• 1992

전기.전자기술분야에서 국제표준화는 ICE-(International Electrotechnical Commission:국제전기기술위원회)를 중심으로 하여 ISO의 관련 TC와 CIGRE등에서 국제적인 규격이 제정되고 IEEE를 비롯한 개별국가 혹은 지역국가간 회의에서 토론되어지고 있다. 여기에서는 공업진흥청이 국가대표기관으로 가입하고 있는 IEC의 소개와 더불어 절연재료분야를 다루는 IEC/TC15를 중심으로 하여 관련기관.학회의 도향을 간략히 소개하고자 한다.

• Journal of Electrical Engineering and Technology
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• v.13 no.4
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• pp.1450-1458
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• 2018

Commutation failures can deteriorate the availability of high-voltage direct current (HVDC) links and may lead to outage of the HVDC system. Most commutation failures are caused by voltage reduction due to ac system faults on inverter side. The commutation failure process can be divided into two stages. The first stage, from the occurrence to the clearing of faults, is called 'Deterioration Stage'. The second stage, from the faults clearing to restoring the power system stability, is called 'Recovery Stage'. Based on the analysis of the commutation failure process, this paper proposes a direct-current fuzzy controller including prevention and recovery controller. The prevention controller reduces the direct current to prevent Commutation failures in the 'Deterioration Stage' according to the variation of ac voltage. The recovery controller magnifies the direct current to speed up the recovery of power system in the 'Recovery Stage', based on the recovery of direct voltage. The validity of this proposed fuzzy controller is further proved by simulation with CIGRE HVDC benchmark model in PSCAD/EMTDC. The results show the commutation failures can be mitigated by the proposed direct-current fuzzy controller.

• Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference
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• 1999.11a
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• pp.132-135
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• 1999

In this work, two approaches were proposed for the recognition of partial discharge patterns. The first approach was neural network with backpropagation algorithm, and the second approach was angle calculation between two operator vectors. PD signal were detected using three electrode systems; IEC(b), needle-plane and CIGRE method II electrode system. Both of neural network and angle comparison method showed good recognition performance for the patte군 similar to the trained patterns. And the number of operators to be used had a great influence on the recognition performance to the untrained patterns.

• Proceedings of the KIEE Conference
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• 1999.07e
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• pp.2411-2413
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• 1999

Regarding the application of diagnistic technology using PD signal to power apparatus, it is necessary to discriminate the type of defect as well as to determine whether the PD occurs or not. In this research, PD characteristics of multi-defects insulating system were presented, the PD signals were detected from three kinds of electrode systems, IEC(b), needle-plane and CIGRE method II. To make multi-defect systems artificially, we combined three electrode systems and applied same test voltage simultaneously.

• Proceedings of the KIEE Conference
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• 1997.07c
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• pp.1018-1020
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• 1997

This paper is compared the configuration method of cable cover protection unit with respect to the lightning surge in 154kV underground transmission system. There are many methods of connecting CCPU, i.e, a conventional method, CIGRE method, inter-connection between sheath with grounding, and interconnection between sheath without grounding.

• Proceedings of the KIEE Conference
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• 1996.11a
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• pp.160-162
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• 1996

This paper is one-phase fault current analysis of 154kV underground transmission power cable. Its purpose is to gain knowleges of connect ing the CCPU and to show the merits as its method. There are many methods of connect ing CCPU, i.e, a conventional method, CIGRE method, interconnect ion between sheaths with grounding, and interconnect ion between sheaths without grounding. These methods will be compared in this paper.