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Title: Operation and control of hybrid HVDC system with LCC and full-bridge MMC connected in parallel

Abstract

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.

Authors:
 [1];  [1];  [2];  [1]
  1. Univ. of Tennessee, Knoxville, TN (United States)
  2. ABB Corporate Research Raleigh, NC (United States)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1665962
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Accepted Manuscript
Journal Name:
IET Generation, Transmission, & Distribution
Additional Journal Information:
Journal Volume: 14; Journal Issue: 7; Journal ID: ISSN 1751-8687
Publisher:
Institution of Engineering and Technology
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING

Citation Formats

Xiao, Huangqing, Sun, Kaiqi, Pan, Jiuping, and Liu, Yilu. Operation and control of hybrid HVDC system with LCC and full-bridge MMC connected in parallel. United States: N. p., 2020. Web. https://doi.org/10.1049/iet-gtd.2019.1336.
Xiao, Huangqing, Sun, Kaiqi, Pan, Jiuping, & Liu, Yilu. Operation and control of hybrid HVDC system with LCC and full-bridge MMC connected in parallel. United States. https://doi.org/10.1049/iet-gtd.2019.1336
Xiao, Huangqing, Sun, Kaiqi, Pan, Jiuping, and Liu, Yilu. Thu . "Operation and control of hybrid HVDC system with LCC and full-bridge MMC connected in parallel". United States. https://doi.org/10.1049/iet-gtd.2019.1336. https://www.osti.gov/servlets/purl/1665962.
@article{osti_1665962,
title = {Operation and control of hybrid HVDC system with LCC and full-bridge MMC connected in parallel},
author = {Xiao, Huangqing and Sun, Kaiqi and Pan, Jiuping and Liu, Yilu},
abstractNote = {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.},
doi = {10.1049/iet-gtd.2019.1336},
journal = {IET Generation, Transmission, & Distribution},
number = 7,
volume = 14,
place = {United States},
year = {2020},
month = {3}
}

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