• Proceedings of the KIEE Conference
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• 2009.07a
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• pp.571_572
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• 2009

전력수요는 시시각각 변한다. 또한 첨두수요는 매년 증가하고 있다. 이러한 수요의 증가에 따른 발전용량도 증가하여야 한다. 발전용량의 증가를 위해서는 전원계획을 통한 신규 발전소를 건설하여야 한다. 신규발전소를 건설함에 있어서는 송전선 및 여러 가지 조건들을 고려하여 건설하여야 한다. 또한 우리나라는 부하가 집중되어 있는 수도권과 발전기가 집중되어 있는 비수도권으로 크게 구분되어 진다. 이러한 특성 때문에 북상조류의 발생과 송전선의 제약도 크게 걸린다. 이러한 문제를 해결하기 위해 신규발전소를 수도권 근처에 건설하도록 유도하여야 한다. 신규발전소의 수도권 유치를 위해 전원계획시 가중치를 부여하고 있다. 이 논문에서는 총발전비용과 비계량 지표를 이용하여 객관적인 가중치를 부여방법에 대해 논하고 있다.

• Proceedings of the KIEE Conference
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• 2009.07a
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• pp.1672_1673
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• 2009

전력계통의 전지역 또는 광역 정전시 빠른 시간내 다시 전력을 공급할 수 있도록 조치를 취하여야 한다. 그러나 시송전에 있어 가장 중요한 자체기동발전소의 무인화로 인해 복구 시간이 지연되고 이 문제점을 해결하고자 자체기동발전소의 원격제어시스템을 완성하였다. 자체기동발전소 비상발전기의 원격제어, 자동동기투입장치의 도입, MMI 설계등과 기존 발전통합시스템과의 연계를 통하여 무인 자체기동발전소의 모든 감시 및 제어를 통합센터에서 가능하도록 구현하였다.

• Proceedings of the KIEE Conference
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• 2005.07a
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• pp.855-857
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• 2005

Transmission congestion is one of the Key factor to local market power in competitive electricity markets. Financial transmission rights provide the financial protection to their holders by paying back the congestion cost. However, the market participants who have market power can exacerbate their market power. This paper analyzes the effect of exercising local market power with the rights on the market price. The proposed methodology was demonstrated with the Optimal Power Flow(OPF). Case study is fulfilled by GAMS simulation. The simulation are condusted in case of Nodal Pricing.

• Proceedings of the KIEE Conference
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• 2005.07a
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• pp.664-666
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• 2005

본 논문에서는 장거리 초고압 송전선로에서의 단상재폐로시에 발생가능한 과전압과 2차아크전류를 EMTP를 이용하여 예측계산 하였다. 예측계산결과로부터 과전압을 억제하고 재폐로 동작이 가능한 최적의 중성점 리액터와 400 kV 급 수평배열 1회선 선로를 단상으로 재폐로 하는데 필요한 재폐로 무전압시간을 구하였다.

• The Transactions of The Korean Institute of Electrical Engineers
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• v.56 no.2
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• pp.268-276
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• 2007

Transmission congestion is one of the key factors to local market power in competitive electricity markets. Financial transmission rights provide the financial protection to their holders by paying back the congestion rent. A variety researches have shown that the existing trading mechanisms on transmission right can exacerbate market power. This paper proposes an alternative methodology in mitigating the local market power using the Contingent Transmission Rights on the locational marginal pricing scheme. The proposed methodology was demonstrated with the Optimal Power Flow.

• The Transactions of the Korean Institute of Electrical Engineers A
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• v.53 no.6
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• pp.350-357
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• 2004

In a deregulated electricity generation market, the sufficient capacity of transmission lines will promote the competition among generation companies (Gencos). In this paper, we show that Gencos' possession of rights to collect congestion rents may increase the competition effects of the transmission lines. In order for concrete analysis on this effect, a simple symmetric market model is introduced. In this framework, introducing the transmission right to the Gencos has the same strategic effects as increasing the line capacity of the transmission line. Moreover, the amount of effectively increased line capacity is equal to the amount of the line rights. We also show that the asymmetric share of the financial transmission rights may result in an asymmetric equilibrium even for symmetric firms and markets. We also demonstrate these aspects in equal line rights model and single firm line rights model. Finally, a numerical example is provided to show the basic idea of the proposed paper.

• The Transactions of The Korean Institute of Electrical Engineers
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• v.59 no.7
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• pp.1226-1231
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• 2010

This paper looks at the influence of Financial Transmission Rights (FTRs) on the market value(Social Welfare; SW) in the competitive electricity market. The transmission line constraints make it difficult to compute the Nash Equilibrium (NE) due to causing a mixed strategy NE instead of a pure strategy NE. Computing a mixed strategy is more complicated in a multi-player game. The aim of this paper are to compute a mixed strategy NE and analyze SW in power transaction with FTRs. This paper introduces a formula and a technique for solving NE of multi-player game with FTRs. In addition, it analyzes the influence of holding of FTRs by generation company on SW and it proposes the SW at NE is influenced by Power Transfer Distribution Factor (PTDF) where holder of FTRs are located. The assertion is verified by calculating the mixed strategy utilizing the Cournot model widely used for studies on FTRs.

• Proceedings of the KIEE Conference
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• 2007.07a
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• pp.844-845
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• 2007

단일요금제를 사용하는 우리나라 전력시장은 시장 참여자에게 지역적 가격신호를 제공하지 못한다. 그래서 부하가 밀집되어있는 수도권 지역에 발전사업자와 부하에 혜택을 주고 비수도권 발전사업자와 부하에는 페널티를 주어 부하가 밀집된 지역에 발전기를 유치하기 위한 지역적 가격신호를 줄 수 없다. 가격신호는 공정하고 논리적인 이유를 갖추고 시장 참여자에게 제공되 어야 한다. 본 논문에서는 시장 참여자에게 공정한 가격신호를 주기위한 송전요금할당 방법을 제안한다.

• KEPCO Journal on Electric Power and Energy
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• v.5 no.4
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• pp.249-256
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• 2019

A full-scale test line was established to verify the electrical environmental interferences caused by the HVDC ±500 kV Double Bipole overhead transmission line with metallic return conductor, which is scheduled for construction in Korea and the fullscale test was conducted for one year. And through the human perception test of the DC electric-field under the HVDC Double Bipole line, the threshold value at which the human detects DC electric field was investigated to verify the validity of the design guide for the HVDC ±500 kV Double Bipole overhead transmission line. The polarity configuration of the HVDC ±500 kV Double Bipole test line was arranged diagonally with the same polarity in terms of the electrical environment disturbance and operation. The test line utilized the 6-bundle arrangement to prevent the corona discharge taking into account the domestic social acceptability. The test results show that the HVDC ±500 kV Double Bipole transmission line generated very little corona discharge from the conductors. Therefore, both DC electric field and ion current density met the domestic design guide for DC overhead transmission lines. Also, the human perception test of DC electric fields under the test line showed that 70% of participants did not recognize the DC electric field even when exposed to 23 kV/m.

• KEPCO Journal on Electric Power and Energy
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• v.5 no.3
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• pp.141-147
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• 2019

Recently, the biggest issue in the electricity industry is the increase in renewable energy, and various technologies are being developed to ensure the capacity of the power system. In addition, super-grids linking power systems are being pushed to utilize eco-friendly energy between countries and regions worldwide. The HVDC transmission technology is required to link the power network between regions with different characteristics of the power system such as frequency and voltage. Until now, Korea has applied HVDC transmission technology that connects mainland and Jeju Island with submarine cables. But, the HVDC transmission technology is still developing for long-distance high-capacity power transmission from power parks on the east coast to load-tight areas near the metropolitan area. Considering the high population density and mountainous domestic environment, it is pushing for commercialization of the design technology of the ${\pm}500kV$ Double Bipole with metallic return wire transmission line to transmit large-scale power of 8 GW using minimal right of ways. In this paper, the insulation characteristics were studied for the design of double-bipole transmission tower with metallic return wire, which is the first time in the world. And the air insulation characteristics resistant to the various overvoltage phenomena occurring on transmission lines were verified through a full-scale impulse voltage test.