• The Transactions of The Korean Institute of Electrical Engineers
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• v.57 no.11
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• pp.1897-1904
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• 2008

In this paper, the method for effective stability analysis of Jeju power system in 2011 is proposed. The stability analysis of Jeju power system was carried out by using proposed method In case of Jeju power system with wind turbine generators or without wind turbine generators, including CSC HVDC or VSC HVDC. The steady-state stability is validated by SCR and ESCR, PV curve, QV curve. And the transient stability is analyzed by CCT(Critical Clearing Time). VSC HVDC has more advantages than CSV HVDC on the stability. Also, Jeju power system without wind turbine generators has more advantages than Jeju power system with Wind Turbine Generators on the stability.

• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.24 no.12
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• pp.91-99
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• 2010

HVDC converter station consists of a number of equipment such as converter transformer, ac filter, thyristor valve and so on. They can be acoustic noise sources. In this paper, we analyzed the simulation results of the outdoor acoustic noise for HVDC converter station. It shows that maximum noise level in boundary of HVDC converter station exceeds regulation value. The main factors in generating maximum noise level are ac filter and converter transformer. Then we applied some soundproof countermeasures in HVDC converter station. Shielding wall is enough to reduce transformer noise level but not enough to reduce ac filter noise level. In case of ac filter, soundproof building is effective in satisfying noise level regulation in boundary of HVDC converter station. In addition, we also studied effects of season, soundproof woods, ground.

• Proceedings of the KIEE Conference
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• 2011.07a
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• pp.490-491
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• 2011

This paper describes the EMTP/ATP Draw modeling HVDC submarine cable. HVDC submarine cables consist of conductor, lead sheath and amore. It is different from general cable which is composed with just conductor and aluminium sheath. Therefore, the transient characteristics are totally different between HVDC submarin cable and general cable. However, the study on HVDC cable modeling and Transient are insufficient. In this paper, characteristic and effectiveness of HVDC Submarine Cable through Transient analysis. Therefore it is evaluated that the application of HVDC Submarine cable at the field should be considered cautiously when more detailed transient analysis, another electrical testes and economic evaluations are implemented.

• The Transactions of the Korean Institute of Power Electronics
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• v.11 no.2
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• pp.184-191
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• 2006

This paper deals with the HVDC system fault analysis and the tuning of the control parameter. This paper is based on the actual cable fault which was caused by the overvoltage due to commutation failure. In order to analyze the fault, the detailed PSCAD/EMTDC model which the sampling time is $50{\mu}s$, was made. Finally, the control parameter of HVDC system was tuned.

• The Transactions of the Korean Institute of Electrical Engineers A
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• v.54 no.8
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• pp.401-409
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• 2005

This paper describes a feasibility analysis result of STATCOM application for the Jeju-Haenam HVDC system. The Jeju-Haenam HVDC system is one of the typical HVDC system interconnected with the low short-circuit-ratio AC system, which is vulnerable to the commutation failure due to the AC voltage variation. STATCOM has been considered as an effective reactive-power compensator to increase short-circuit-ratio of the interconnected AC system. In this study, a simulation model of Jeju-Hacnam HVDC system with STATCOM was developed using PSCAD/EMTDC. The developed simulation model was utilized to analyze the dynamic performance analysis of Jeju-Haenam HVDC system with STATCOM. The analysis results show that STATCOM can improve the dynamic performance of Jeju-Haenam HVDC system, such as load-change recovery performance and fault recovery performance.

• The Transactions of The Korean Institute of Electrical Engineers
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• v.63 no.3
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• pp.343-348
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• 2014

Recently, applications of VSC-HVDC systems to power systems are growing because of their control ability of reactive power. Meanwhile, the hardware-in-the-loop simulation (HILS) based on the real-time digital simulator has been applying to develop and test imbedded controllers and systems in the power industry to decrease costs and to save time. In this paper, a 3-level neutral point clamped (NPC) VSC-HVDC system is modeled and the embedded controllers of the NPC VSC-HVDC system are designed. The designed controllers are implemented by TMS320F28335. The TMS320F28335-based controllers of the NPC VSC-HVDC system are tested using the HILS.

• Proceedings of the KIPE Conference
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• 2014.11a
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• pp.175-176
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• 2014

본 논문은 HVDC C&P 시스템에 적용된 이중화 기술 및 기능을 설명한다. LS산전은 2009년 HVDC 사업을 착수한 이래 HVDC Control and Protection(C&P) System을 개발해 왔으며 현재 2010년부터 한국전력공사와 협동연구로 진행하고 있는 HVDC 제주 실증단지에 적용하여 실증운전 중이다. 당사가 개발한 HVDC C&P 시스템은 시스템의 신뢰성 및 가용성을 높이기 위해 Fully Redundancy 시스템으로 구성되고 Hot Standby 방식으로 제어 및 보호 알고리즘을 수행한다. 본 논문에서는 HVDC C&P 시스템의 구성과 제어기 및 네트워크의 이중화 구조에 대해 소개 하고자 한다.

• Proceedings of the KIEE Conference
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• 2006.07a
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• pp.442-443
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• 2006

본 논문에서는 현재 전류원 HVDC로 연계되어있는 제주-해남 전력계통을 전압원 HVDC로 대체하였을 경우 동특성을 분석한 내용에 대해 기술하고 있다. 동적특성분석을 위해 EMTDC를 이용한 시뮬레이션모델을 개발하고 전압원 HVDC가 일정조류제어와 주파수제어를 수행할 때 유무효전력의 제어특성을 분석하였다. 전압원 HVDC 시스템은 전류원 HVDC와는 달리 컨버터 자체로 유무효전력을 독립적으로 제어할 수 있어 동기조상기와 캐패시터뱅크 같은 무효전력보상설비를 필요로 하지 않는다. 본 연구결과는 향후 전압원 HVDC 시스템의 설치를 검토할 때 활용 가능할 것으로 보인다.

• Proceedings of the KIEE Conference
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• 2005.07a
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• pp.60-62
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• 2005

This paper describes a feasibility analysis result of STATCOM application for the Jeiu-Haenam HVDC system. The Jeju-Haenam HVDC system is one of the typical HVDC system interconnected with the low short-circuit-ratio AC system, which is vulnerable to the commutation failure due to the AC voltage variation. STATCOM has been considered as an effective reactive-power compensator to increase short-circuit-ratio of the interconnected AC system. In this study, a simulation model of Jeju-Haenam HVDC system with STATCOM was developed using PSCAD/EMTDC. The developed simulation model was utilized to analyze the dynamic performance analysis of Jeju-Haenam HVDC system with STATCOM. The analysis results show that STATCOM can improve the dynamic performance of Jeju-Haenam HVDC system, such as load-change recovery performance and fault recovery performance.

• Journal of Electrical Engineering and Technology
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• v.1 no.1
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• pp.23-27
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• 2006

In this paper a Hybrid Real Time HVDC Simulator fur both operator Training and Researching in the Cheju-Haenam HVDC System is proposed and its performance is studied by means of RTDS (Real Time Digital Simulator), EMTDC (Electro-Magnetic Transients system for DC), PSS/E (Power System Simulator for Engineering), and experienced scenarios. The objective of this paper is to represent the strategy in development for KEPCO's hybrid HVDC simulator for the Cheju-Haenam HVDC system. This simulator consists of two DC stations, DC cables, external digital/analog controllers, monitoring systems and control desk for education, and AC networks. Its suitability for operator's education is tested during startup/shutdown and normal state operations. Dynamic performances of it are also verified.