The multi-region hydrogen energy system can effectively exert its collaborative low-carbon support ability through the interaction of hydrogen energy between regions and the flexible conversion of multi-link electricity and hydrogen within the region. In view of the existing electricity-hydrogen-transportation system

which rarely takes into account the interconnection and interaction characteristics of multi-region hydrogen energy systems

this paper proposes a distribution network operation method that considers the cooperative characteristics of multiple electricity-hydrogen-transportation virtual energy pools (MEHT-VEP). Firstly

the virtual energy pool operation mode and MEHT-VEP interconnection cooperative operation model considering the coupling characteristics of electricity-hydrogen-transportation are proposed. Secondly

the low-carbon control space of multiple virtual energy pools is summarized and characterized by the committed carbon emission operation region (CCEOR)

and the convex envelope fitting process of the domain boundary is proposed. Then

considering the analytical constraints of MEHT-VEP low-carbon control space

the distribution network operation model is established to optimize the comprehensive operating cost of the distribution network. Finally

based on the test system of a regional distribution network

the simulation analysis is carried out to verify that the proposed distribution network operation method not only guarantees the internal operation information of each regional electricity-hydrogen-transportation system

but also effectively plays the role of low-carbon support for the power system.