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불평형 전원 조건에서 MMC 기반 HVDC 시스템 순환전류에 관한 연구

Title
불평형 전원 조건에서 MMC 기반 HVDC 시스템 순환전류에 관한 연구
Other Titles
A Study of Circulating Current in MMC based HVDC System under an Unbalanced Grid Condition
Author
김래영
Keywords
Circulating current; Modular multi-level converter (MMC); High voltage direct current (HVDC); MMC; HVDC
Issue Date
2015-08
Publisher
대한전기학회
Citation
전기학회논문지, v. 64, NO 08, Page. 1193-1201
Abstract
This paper presents a study of circulating current of modular multi-level converter (MMC) based a high voltage direct current (HVDC) system under unbalanced grid conditions. Due to the connection of a dependent DC source in each phase, the MMC system inherently generates the power ripple of double-line-frequency components in the AC-side and as a result, the additional sinusoidal current named circulating current flows through the each arm. Reliability improvement of HVDC system under an unbalanced grid condition is one of the important criteria. Generally, the modeling of the circulating current is based on the power relation between DC-side and AC-side. However, the method is not perfectly matched in the MMC system due to the difference of the structural characteristic. In this paper, improved modeling method of circulating current is proposed, which is based on the inner arm power. The proposed method is verified by several simulations to have good agreement of the circulating current components.
URI
http://www.dbpia.co.kr/Journal/ArticleDetail/NODE06393761?TotalCount=1&Seq=1&q=((%5B%EB%B6%88%ED%8F%89%ED%98%95%20%EC%A0%84%EC%9B%90%20%EC%A1%B0%EA%B1%B4%EC%97%90%EC%84%9C%20MMC%20%EA%B8%B0%EB%B0%98%20HVDC%20%EC%8B%9C%EC%8A%A4%ED%85%9C%EC%88%9C%ED%99%98%EC%A0%84%EB%A5%98%EC%97%90%20%EA%B4%80%ED%95%9C%20%EC%97%B0%EA%B5%AC%C2%A7coldb%C2%A72%C2%A751%C2%A73%5D))&searchWord=%EC%A0%84%EC%B2%B4%3D%5E%24%EB%B6%88%ED%8F%89%ED%98%95%20%EC%A0%84%EC%9B%90%20%EC%A1%B0%EA%B1%B4%EC%97%90%EC%84%9C%20MMC%20%EA%B8%B0%EB%B0%98%20HVDC%20%EC%8B%9C%EC%8A%A4%ED%85%9C%EC%88%9C%ED%99%98%EC%A0%84%EB%A5%98%EC%97%90%20%EA%B4%80%ED%95%9C%20%EC%97%B0%EA%B5%AC%5E*&searchWordCondition=%EC%9E%90%EB%A3%8C%EC%9C%A0%ED%98%95%3D%5E%24%EC%A0%84%EC%B2%B4%5E*&Multimedia=0&isIdentifyAuthor=0&Collection=0&isFullText=0&specificParam=0&SearchMethod=0&Sort=1&SortType=desc&Page=1&PageSize=50http://hdl.handle.net/20.500.11754/27076
ISSN
1975-8359; 2287-4364
DOI
10.5370/KIEE.2015.64.8.1193
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > ELECTRICAL AND BIOMEDICAL ENGINEERING(전기·생체공학부) > Articles
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