The reliability and safety of offshore substation are basis for safe and stable operation of offshore wind farms. The characteristics and existing problems of offshore substation construction are firstly analyzed in this paper. Based on the cases of offshore wind power projects implemented

the main risks and key points are pointed out for structure manufacturing

equipment installation and commissioning stage in construction process of the offshore substation

a targeted quality control method combining prevention with process

after-test is put forward

a complete and effective quality control technology for offshore substation construction has been formed. It is verified through the implementation of the actual project

and the standard is promoted in the industry. It has the important technical guiding significance and reference value for ensuring the construction quality of offshore substations.