Operation and control of hybrid HVDC system with LCC and full‐bridge MMC connected in parallel
In: IET Generation, Transmission & Distribution, Jg. 14 (2020-02-14), S. 1344-1352
Online
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Zugriff:
In this study, a new kind of hybrid high-voltage direct current (HVDC) system is proposed. Each terminal of the proposed system consists of one line commutated converter (LCC) and one full-bridge modular multilevel converter (FB-MMC). The LCC and FB-MMC are connected in parallel so that they can share the same transmission line. The active-reactive power capability of the hybrid HVDC system is extended compared with the conventional LCC-HVDC system, and power reversal control without power interruption can be achieved by the coordination control of LCC and FB-MMC. Besides, the proposed hybrid HVDC system is capable of handling DC fault, because both LCC and FB-MMC have DC fault blocking capability. Moreover, the power rating of FB-MMC can be designed to low value while keeping the bulk-power transmission capability of LCC. A two-terminal bipolar hybrid HVDC system is built in PSCAD/EMTDC. The simulation results verify the effectiveness and feasibility of the proposed hybrid topology and corresponding control strategies.
Titel: |
Operation and control of hybrid HVDC system with LCC and full‐bridge MMC connected in parallel
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Autor/in / Beteiligte Person: | Liu, Yilu ; Pan, Jiuping ; Xiao, Huangqing ; Sun, Kaiqi |
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Zeitschrift: | IET Generation, Transmission & Distribution, Jg. 14 (2020-02-14), S. 1344-1352 |
Veröffentlichung: | Institution of Engineering and Technology (IET), 2020 |
Medientyp: | unknown |
ISSN: | 1751-8695 (print) ; 1751-8687 (print) |
DOI: | 10.1049/iet-gtd.2019.1336 |
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