Large-capacity dual-water internal cooling condenser has the function of reactive power compensation support with fast response in UHVDC system. In order to meet the performance requirements of dynamic reactive power regulation

fast response and safety

and reliability

we designed a large-capacity dual-water internal cooled camera to improve the transient and sub-transient characteristics

excitation power and output range of the camera. Moreover

we discussed the design of ventilation cooling system and the calculation of temperature rise of stator and rotor. In the aspect of insulation design

the inner shield structure is adopted

the shielding effect of the equalizing layer is realized through semiconductor materials

the chamfer radius of the transposition filling is increased

the electric field uniformity of the stator bar corner is increased

and the electrical performance index of the main regulator is optimized by adopting a once-through forming stator bar anti halo structure. In the aspect of structural design

the overall glue filling structure at the end is adopted for the stator winding

which effectively prevents the end from loosening. A full-compensation and creep-resistance technology to prevent loosening of the core is adopted for the stator core due to fundamental frequency and frequency doubling vibration. The research results show that the key technologies such as the special cooling mode

electromagnetic

insulation and structural process optimization of large-capacity dual-water internal cooled camera can make it to satisfy the reactive power support of UHVDC system.