• Proceedings of the KIPE Conference
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• 2011.07a
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• pp.216-217
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• 2011

HVDC System의 핵심 구성요소인 대용량 전력변환장치의 신뢰도를 확보하기 위해서는 시스템 설치 전에 전력변환장치를 구성하는 각 Thyrister Valve의 동작성능 검증이 매우 중요하다. 이러한 검증은 모든 Thyrister Valve를 대상으로 한 전수검사를 기본으로 하므로 Thyrister Valve의 성능시험장치 개발이 필요하다. 이 논문에서는 Full Power 시험과 유사한 특성을 얻기 위한 시험장치의 용량을 최소화하기 위하여 STC(Synthetic Test Circuit)기법을 사용한 2kV, 200A급의 STC를 Simplorer6.0프로그램을 이용하여 구현하였으며, STC의 동작특성을 모의 하였다.

• Journal of Electrical Engineering and Technology
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• v.12 no.2
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• pp.594-600
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• 2017

HVDC transmission systems can be configured in many ways to take into account cost, flexibility and operational requirements. [1] For long-distance transmission, HVDC systems may be less expensive and suffer lower electrical losses. For underwater power cables, HVDC avoids the heavy currents required to charge and discharge the cable capacitance of each cycle. For shorter distances, the higher cost of DC conversion equipment compared to an AC system may still be warranted, due to other benefits of direct current links. HVDC allows power transmission between unsynchronized AC transmission systems. Since the power flow through an HVDC link can be controlled independently of the phase angle between the source and the load, it can stabilize a network against disturbances due to rapid changes in power. HVDC also allows the transfer of power between grid systems running at different frequencies, such as 50 Hz and 60 Hz. This improves the stability and economy of each grid, by allowing the exchange of power between incompatible networks. This paper proposed to establish Korean HVDC technology through a cooperative agreement between KEPCO and LSIS in 2010. During the first stage (2012), a design of the ${\pm}80kV$ 60MW HVDC bipole system was created by both KEPCO and LSIS. The HVDC system was constructed and an operation test was completed in December 2012. During the second stage, the pole#2 system was fully replaced with components that LSIS had recently developed. LSIS also successfully completed the operation test. (2014.3)