[논문]Improvement of LCC-HVDC Input-Output Characteristics using a VSC-MMC Structure

Kim, Soo-Yeon; Park, Seong-Mi; Park, Sung-Jun; Kim, Chun-Sung

doi:10.21289/ksic.2021.24.4.377

Improvement of LCC-HVDC Input-Output Characteristics using a VSC-MMC Structure 원문보기

한국산업융합학회 논문집 = Journal of the Korean Society of Industry Convergence, v.24 no.4/2, 2021년, pp.377 - 385

Kim, Soo-Yeon (Dept. of Electrical Engineering, Chonnam University) , Park, Seong-Mi (Dept. of Lift Engineering, Korea Lift College) , Park, Sung-Jun (Dept. of Electrical Engineering, Chonnam National University) , Kim, Chun-Sung (Energy Innovative Industry R&D Dept, Green Energy Institute)

Abstract ▼ AI-Helper

High voltage direct current(HVDC) systems has been an alternative method of a power transmission to replace high voltage alternate current(HVAC), which is a traditional AC transmission method. Due to technical limitations, Line commutate converter HVDC(LCC-HVDC) was mainly used. However, result from many structural problems of LCC-HVDC, the voltage source converter HVDC(VSC-HVDC) are studied and applied recently. In this paper, after analyzing the reactive power and output voltage ripple, which are the main problems of LCC-HVDC, the characteristics of each HVDC are summarized. Based on this result, a new LCC-HVDC structure is proposed by combining LCC-HVDC with the MMC structure, which is a representative VSC-HVDC topology. The proposed structure generates lower reactive power than the conventional method, and greatly reduces the 12th harmonic, a major component of output voltage ripple. In addition, it can be easily applied to the already installed LCC-HVDC. When the proposed method is applied, the control of the reactive power compensator becomes unnecessary, and there is an advantage that the cut-off frequency of the output DC filter can be designed smaller. The validity of the proposed LCC-HVDC is verified through simulation and experiments.

주제어

표/그림 (13)

그림 Fig. 1 3-Phase thyristor rectifier
그림 Fig. 2 Voltage and currents of a 3-phase thyristor rectifier
그림 Fig. 3 Reactive power characteristic according to active power and α
그림 Fig. 4 The MMC structure of VSC-HVDC.
표 Table 1. Comparison of LCC-HVDC and VSC-HVDC.
그림 Fig. 6 Principle of the proposed system
표 Fig. 5 The proposed LCC-HVDC using the MMC structure
그림 Fig. 7 Voltage and currents of conventional LCC-HVDC. (1000[MW] / α=20[°])
그림 Fig. 8 Voltage and currents of proposed LCC-HVDC with a single sub converter. (1000[MW])
그림 Fig. 9 Input/Output characteristics of proposed LCC-HVDC
그림 Fig. 10 Experiment stack
그림 Fig. 11 Voltages and current according to α.
그림 Fig. 12 Output voltage and current.

AI 본문요약
AI-Helper

성능/효과

By fixing α to a small value, it was possible to increase the reactive power and decrease the amount of change in the reactive power according to the active power
By fixing α to a small value, it was possible to increase the reactive power and decrease the amount of change in the reactive power according to the active power. In addition, it was confirmed that the 12th-order harmonics of the fundamental wave, which are structurally generated, can be greatly reduced by controlling the auxiliary converters connected in series. The proposed method can easily improve the performance by adding an auxiliary converter to the already installed LCC-HVDC.
In addition, it was confirmed that the 12th-order harmonics of the fundamental wave, which are structurally generated, can be greatly reduced by controlling the auxiliary converters connected in series. The proposed method can easily improve the performance by adding an auxiliary converter to the already installed LCC-HVDC. Due to the many disadvantages of LCC- HVDC, it is considered that the lifespan of the LCC-HVDC can be further extended through the proposed method in the trend of transitioning to VSC-HVDC.

후속연구

The proposed method can easily improve the performance by adding an auxiliary converter to the already installed LCC-HVDC. Due to the many disadvantages of LCC- HVDC, it is considered that the lifespan of the LCC-HVDC can be further extended through the proposed method in the trend of transitioning to VSC-HVDC.
In this paper, to improve the input/output characteristics of LCC-HVDC, a new LCC-HVDC structure combined with a serial auxiliary converter is proposed. By fixing α to a small value, it was possible to increase the reactive power and decrease the amount of change in the reactive power according to the active power.

참고문헌 (6)

Yong Lin, Zheng Xu, Liang Xiao, Zheren Zhang, Huangqing Xiao "Analysis of coupling effect on LCC-MCC hybrid HVDC from parallel AC lines in close proximity," 2015 IEEE Power & Energy Society General Meeting, pp. 1-5, 2015.
Yanting Wang, Baohui Zhang "Study on the transmission line boundary characteristics of the hybrid HVDC system," 2016 IEEE PES AsiaPacific Power and Energy Engineering Conference, pp. 1311-1315, 2016.
Ji-Woo Moon, Chun-Sung Kim, Jung-Woo Park, Dae-Wook Kang, Jang-Mok Kim, "Circulating Current Control in MMC Under the Unbalanced Voltage," IEEE Transactions on power delivery, vol 28, no 3, p.p 1952-1959, 2013.

상세보기
HVDC Technical guide, KEPCO.
T. Sousa, M. L. dos Santos, J. A. Jardini, R. P. Casolari and G. L. C. Nicola, "An evaluation of the HVDC and HVAC transmission economic," 2012 Sixth IEEE/PES Transmission and Distribution: Latin America Conference and Exposition (T&D-LA), 2012, pp. 1-6,
Kazi N. Hasan, Tapan K. Saha "Reliability and economic study of multi-terminal HVDC with LCC & VSC converter for connecting remote renewable generators to the grid" 2013 IEEE Power & Energy Society General Meeting pp.1-5, 2013.

내보내기 구분	파일저장 인쇄 메일전송
구성항목	기본정보 상세정보 관리번호, 논문명, 저널/프로시딩명, 저자 , 발행년, 권, 호, 시작페이지, 끝페이지, 발행기관 관리번호, 논문명, 대등논문명, 저자 , 저널/프로시딩명, 발행기관, 발행년, 발행언어, 권, 호, 시작페이지, 끝페이지, ISBN, ISSN, 주제분야, 키워드, 초록(한글), 초록(영문), 저자(소속기관)
저장형식	Text(ASCII format) Excel format RefWorks Direct Export RIS format (for Reference Manager, ProCite, EndNote), Scholar's Aids, Mendeley
메일정보	받는사람 (필수) @ 보내는사람 (선택) @ 제목 내용 KISTI 검색결과 이메일 서비스
안내	총 건의 자료가 검색되었습니다. 다운받으실 자료의 인덱스를 입력하세요. (1-10,000) 검색결과의 순서대로 최대 10,000건 까지 다운로드가 가능합니다. 데이타가 많을 경우 속도가 느려질 수 있습니다.(최대 2~3분 소요) 다운로드 파일은 UTF-8 형태로 저장됩니다. 파일의 내용이 제대로 보이지 않을실 때는 웹브라우저 상단의 보기 -> 인코딩 -> 자동선택 여부를 확인하십시오. ~ Text(ASCII format) Excel format

연합인증