With the rapid development of ultra-high voltage (UHV) AC/DC transmission technology

power grid structures have become increasingly complex

with networking methods evolving toward diversified coexistence

including hybrid DC

flexible DC

and UHV AC. The integrated sending-receiving UHV hybrid AC/DC grid has emerged as a new configuration for provincial power grids. Compared to purely sending- or receiving-end UHV hybrid AC/DC grids

the integrated sending-receiving grid exhibits distinct features: coexistence of stability characteristics at both ends

complex coupling across multiple stability issues

and intensified dynamic interactions between AC and DC systems. These characteristics result in more complex stability behaviors

more variable operational controls

and greater challenges in fault prevention

making power grid security and stability risks increasingly prominent. To address these challenges

this paper first conducts an in-depth analysis of the characteristics and main challenges of integrated sending-receiving UHV hybrid AC/DC grids. Subsequently

it summarizes technical pathways across three dimensions —characteristic cognition

operational control

and fault prevention —using the Sichuan Power Grid

a typical integrated sending-receiving system

as a case study to illustrate relevant engineering practices. Finally

to meet the growing demands for enhanced system stability

the paper proposes key technological directions

including advanced power equipment

panoramic data perception

ultra-high-precision simulation

and intelligent decision support. These insights aim to provide references for supporting the development and research of UHV hybrid AC/DC power grids.