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.