Under the guidance of the “dual carbon” goal

the demand for fast reactive power regulation of the new power system is becoming increasingly prominent

and the condenser

as an important reactive power support equipment

is difficult to effectively improve its reactive power response speed and operation efficiency due to the limitation of the voltage resistance of the body in the past. The stator of an ultra-high voltage direct-mounted condenser with a target capacity of 30 Mvar-35 kV was taken as the design object

and the key designs such as cable winding and non-magnetic teeth were adopted to realize the direct connection between machine and network. Secondly

the stator cooling structure was designed

and the three-dimensional physical and mathematical models of fluid-heat transfer were established

the heat transfer law in the solution domain was revealed

and the related factors and changes affecting the thermal distribution were explored. The above research provides a research basis for the stator heat dissipation structure of ultra-high voltage direct-mounted condenser

and has certain universality in the research of cable-based winding motor system.