Key technologies of ultra-high voltage hybrid LCC-VSC MTDC systems

Hong Rao; Yuebin Zhou; Shukai Xu; Xipeng Cai; Wanyu Cao; Yiliang Xu; Chenglin Ren

doi:10.17775/CSEEJPES.2019.01140

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Key technologies of ultra-high voltage hybrid LCC-VSC MTDC systems

Regular Papers | 更新时间：2025-12-18

- Key technologies of ultra-high voltage hybrid LCC-VSC MTDC systems
- Key technologies of ultra-high voltage hybrid LCC-VSC MTDC systems
- 中国电机工程学会电力与能源系统学报(英文) 2019年5卷第3期页码：365-373
- 作者机构：
  
  1. Electric Power Research Institute of China Southern Power Grid Co., Ltd.,Guangzhou,China,510663
  2. EHV Transmission Company of China Southern Power Grid Co., Ltd.,Guangzhou,China,510663
- 作者简介：
- 基金信息：
- DOI：10.17775/CSEEJPES.2019.01140
  中图分类号：
- 纸质出版：2019
- 稿件说明：
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Hong Rao, Yuebin Zhou, Shukai Xu, 等. Key technologies of ultra-high voltage hybrid LCC-VSC MTDC systems[J]. 中国电机工程学会电力与能源系统学报(英文), 2019,5(3):365-373.

Hong Rao, Yuebin Zhou, Shukai Xu, et al. Key technologies of ultra-high voltage hybrid LCC-VSC MTDC systems[J]. CSEE Journal of Power and Energy Systems, 2019, 5(3): 365-373.
Hong Rao, Yuebin Zhou, Shukai Xu, 等. Key technologies of ultra-high voltage hybrid LCC-VSC MTDC systems[J]. 中国电机工程学会电力与能源系统学报(英文), 2019,5(3):365-373. DOI： 10.17775/CSEEJPES.2019.01140.

Hong Rao, Yuebin Zhou, Shukai Xu, et al. Key technologies of ultra-high voltage hybrid LCC-VSC MTDC systems[J]. CSEE Journal of Power and Energy Systems, 2019, 5(3): 365-373. DOI： 10.17775/CSEEJPES.2019.01140.

摘要

Abstract

The key technologies of ultra-high voltage hybrid LCC-VSC MTDC systems are investigated

focusing on the design of system configurations

converter topologies and the control and protection system. A double converter per pole of VSC connection is proposed along with the design of a 5000 MW VSC valve to develop a ± 800 kV/5000 MW large-capacity power transmission. The hybrid MMC topology capable of clearing the DC faults and the control strategy are developed to effectively improve the reliability in case of overhead line faults. The control and protection system of the LCC-VSC MTDC system is introduced to offer flexible operations under both normal and abnormal conditions

which includes voltage/current margin-based coordination

converter switch-in and switch-out

re-connection and drop-off of a third station. Simulations of an LCC-VSC MTDC system based on the LCC-VSC MTDC project are performed.

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