Result: Unified Iterative Algorithm for Power Flow of AC/DC System with Multi-Type DC Links

Title:
Unified Iterative Algorithm for Power Flow of AC/DC System with Multi-Type DC Links
Authors:
Zhiqiang Song, Yaohui Huang, Jianzhong Xu, Chengyong Zhao, Xiufang Jia, Huashi Zhao
Source:
CSEE Journal of Power and Energy Systems, Vol 11, Iss 5, Pp 2293-2302 (2025)
Publisher Information:
China electric power research institute, 2025.
Publication Year:
2025
Collection:
LCC:Technology
LCC:Physics
Subject Terms:
AC/DC system, CIM/XML documents, multi type DC links, power flow calculation, unified iterative algorithm, Technology, Physics, QC1-999
Document Type:
Academic journal article
File Description:
electronic resource
Language:
English
ISSN:
2096-0042
Relation:
https://ieeexplore.ieee.org/document/10520193/; https://doaj.org/toc/2096-0042
DOI:
10.17775/CSEEJPES.2023.01190
Access URL:
https://doaj.org/article/5581249b3cec45b98adf5f0cd2a04247
Accession Number:
edsdoj.5581249b3cec45b98adf5f0cd2a04247
Database:
Directory of Open Access Journals

Further Information

As an emerging trend in power grid development, the AC/DC hybrid power grid presents the characteristics of multi-type DC links and large-scale AC/DC interconnection. However, existing research on AC/DC power flow calculation is mainly based on single-object models, ignoring the complex interactions and interdependencies between the AC system and various types of DC links in the hybrid power grid, such as LCC-HVDC, MMC-HVDC, and LCC-MMC hybrid HVDC. Therefore, this paper proposes a power flow calculation algorithm for large-scale AC/DC systems with multi-type DC links. Firstly, a CIM/XML document conversion strategy applicable to the AC/DC system is proposed. Then, a unified modeling method is used to derive the power flow model of the AC/DC system, and a unified iterative algorithm for the large-scale AC/DC system with multi-type DC links is proposed. Finally, the algorithm's correctness and effectiveness are verified by comparing it with actual measurements from the Southern Power Grid of China, with a voltage deviation of less than 1%. The research shows that the proposed algorithm has good convergence and high computational efficiency, which is applicable to power flow calculations in large-scale DC-embedded hybrid AC/DC grids in the future.