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

Zhiqiang Song; Yaohui Huang; Jianzhong Xu; Chengyong Zhao; Xiufang Jia; Huashi Zhao

doi:10.17775/CSEEJPES.2023.01190

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

Regular Papers | 更新时间：2026-10-16

- Unified Iterative Algorithm for Power Flow of AC/DC System with Multi-Type DC Links
- Unified Iterative Algorithm for Power Flow of AC/DC System with Multi-Type DC Links
- 中国电机工程学会电力与能源系统学报(英文) 2025年11卷第5期页码：2293-2302
- 作者机构：
  
  1. State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, North China Electric Power University,Beijing,China
  2. Power Dispatching Control Center, China Southern Power Grid,Guangzhou,China
- 作者简介：
- 基金信息：
- DOI：10.17775/CSEEJPES.2023.01190
  中图分类号：
- 纸质出版：2025-09-01
- 稿件说明：
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Zhiqiang Song, Yaohui Huang, Jianzhong Xu, 等. Unified Iterative Algorithm for Power Flow of AC/DC System with Multi-Type DC Links[J]. 中国电机工程学会电力与能源系统学报(英文), 2025,11(5):2293-2302.

Zhiqiang Song, Yaohui Huang, Jianzhong Xu, et al. Unified Iterative Algorithm for Power Flow of AC/DC System with Multi-Type DC Links[J]. CSEE Journal of Power and Energy Systems, 2025, 11(5): 2293-2302.
Zhiqiang Song, Yaohui Huang, Jianzhong Xu, 等. Unified Iterative Algorithm for Power Flow of AC/DC System with Multi-Type DC Links[J]. 中国电机工程学会电力与能源系统学报(英文), 2025,11(5):2293-2302. DOI： 10.17775/CSEEJPES.2023.01190.

Zhiqiang Song, Yaohui Huang, Jianzhong Xu, et al. Unified Iterative Algorithm for Power Flow of AC/DC System with Multi-Type DC Links[J]. CSEE Journal of Power and Energy Systems, 2025, 11(5): 2293-2302. DOI： 10.17775/CSEEJPES.2023.01190.

摘要

Abstract

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.

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