지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2017.9
- 수록면
- 44 - 50 (7page)
- DOI
- 10.5207/JIEIE.2017.31.9.044
이용수
초록· 키워드
오류제보하기
Recently, the construction of large-scale offshore wind farms and dissemination of new and renewable energy has encouraged a growing interest in DC systems. In particular, HVDC (high-voltage direct current) systems have been evaluated as the best alternative because of their power system interconnection and large-scale power transmission. Because HVDC systems offer many advantages such as a low insulation level, transmission losses, and improved power system stability, many studies on DC power systems are actively underway.
As compared to the point-to-point HVDC system, which connects the electricity generated from geographically scattered renewable energy sources to an existing AC power system on a 1:1 basis, the MTDC (multi-terminal HVDC) system has garnered greater attention because of its ability to control energy flow by connecting several HVDC outputs to the HVDC. Because the VSC-HVDC, which operates as an MTDC, supplies not only active power, but also reactive power, it has been deemed the optimal solution to connect a renewable energy source to a system with no existing AC power supply, such as a wind-power generation system.
An MTDC system, which possesses a structure that is more complex than that of the point-to-point HVDC system, should be equipped with a high-speed DC circuit breaker that can quickly separate a conversion station from the DC transmission line to which it is connected in the event of a fault or malfunction at the station. In addition, DC protection on the MTDC grid must be reliable and operate much faster than conventional AC protection to ensure that the converter sends a trip signal before it is damaged.
In this paper, we propose a protection scheme for the DC line to effectively activate the DC circuit breaker, which is essential in an MTDC system; additionally, system modeling and simulation using the PSCAD/EMTDC were performed to verify the proposed algorithm.
As compared to the point-to-point HVDC system, which connects the electricity generated from geographically scattered renewable energy sources to an existing AC power system on a 1:1 basis, the MTDC (multi-terminal HVDC) system has garnered greater attention because of its ability to control energy flow by connecting several HVDC outputs to the HVDC. Because the VSC-HVDC, which operates as an MTDC, supplies not only active power, but also reactive power, it has been deemed the optimal solution to connect a renewable energy source to a system with no existing AC power supply, such as a wind-power generation system.
An MTDC system, which possesses a structure that is more complex than that of the point-to-point HVDC system, should be equipped with a high-speed DC circuit breaker that can quickly separate a conversion station from the DC transmission line to which it is connected in the event of a fault or malfunction at the station. In addition, DC protection on the MTDC grid must be reliable and operate much faster than conventional AC protection to ensure that the converter sends a trip signal before it is damaged.
In this paper, we propose a protection scheme for the DC line to effectively activate the DC circuit breaker, which is essential in an MTDC system; additionally, system modeling and simulation using the PSCAD/EMTDC were performed to verify the proposed algorithm.
목차
Abstract
1. Introduction
2. DC line protection
3. Algorithm of DC line protection in MTDC
4. MTDC modeling and simulation using PSCAD/EMTDC
5. Conclusions
References
참고문헌 (7)
참고문헌 신청
[학술대회논문] - D. Naidoo / 2004 / HVDC Line Protection for the Proposed Future HVDC Systems / 2004 International Conference on Power System Technology-PowerCon 2004 : 1327 ~ 1332
[학술대회논문] - Jianping Wang / 2015 / Multi-Terminal DC System line Protection Requirement and High Speed Protection Solutions / LUND 2015
[학술대회논문] - Dragan Jovcic / 2011 / Feasibility of DC Transmission Networks / 2011 2nd IEEE PES International Conference and Exhibition on Innovative Smart Grid Technologies
[학술대회논문] - J. Descloux / 2014 / Protection Algorithm based on Differential Voltage Measurement for MTDC Grids / 12th IET International Conference on Developments in Power System Protection(DPSP 2014)
[학술지(정기간행물)] - S. LeBlond / 2016 / Design of Protection Schemes for Multi-terminal HVDC Systems / Renewable and Sustainable Energy Reviews 56 : 965 ~ 974
[학술대회논문] - Jianping Wang / 2015 / Multi-Terminal DC System line Protection Requirement and High Speed Protection Solutions / LUND 2015
[학술대회논문] - Dragan Jovcic / 2011 / Feasibility of DC Transmission Networks / 2011 2nd IEEE PES International Conference and Exhibition on Innovative Smart Grid Technologies
[학술대회논문] - J. Descloux / 2014 / Protection Algorithm based on Differential Voltage Measurement for MTDC Grids / 12th IET International Conference on Developments in Power System Protection(DPSP 2014)
[학술지(정기간행물)] - S. LeBlond / 2016 / Design of Protection Schemes for Multi-terminal HVDC Systems / Renewable and Sustainable Energy Reviews 56 : 965 ~ 974
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