Abstract：In response to the potential local electric field distortion and insulation weaknesses that may occur

under high-voltage operating conditions in 35 kV European cable connectors，a 35 kV European cable connectors

structural design method based on adaptive geometric optimization was proposed. The method integrated electric

field simulation with genetic algorithms to optimize the electric field distribution by adjusting geometric

structural parameters，thereby mitigating the risks of electric field concentration and breakdown. Unlike

traditional structural parameter adjustment methods，the approach designed a reasonable fitness function that

incorporates two primary optimization objectives：electric field uniformity and maximum electric field intensity.

Additionally，dielectric constants，temperature effects，and the electric field concentration effect were integrated

to refine the critical breakdown electric field strength. By comparing the electric field simulation results with the

modified critical breakdown electric field strength，the optimal solution was identified. Simulation results indicate

that，compared to conventional methods，the proposed approach reduces the maximum electric field intensity by

approximately 10%，from 15.55 kV/mm to 14.60 kV/mm. Experimental validation further demonstrates a 5%

improvement in pass rate，meeting the requirements of GB 50168—2018. The method proposed provides an

efficient optimization solution for the design of high-voltage electrical equipment and holds significant

engineering application value.

      Key words：35 kV European cable connector；electric field simulation；adaptive geometric optimization；

genetic algorithm