Introduction  Large capacity wind turbines and 66 kV power collection system will be selected for deep sea large-scale offshore wind power transmission. The wind turbines can be directly connected to the offshore converter station, so the offshore booster station can be cancelled and the intensive design can be realized. In this paper, the key electrical technology of intensive offshore converter station was preliminarily studied.

  Method  On the basis of the existing offshore wind power flexible DC transmission technology, by studying the main circuit topology, core electrical equipment selection and platform layout optimization of the intensive offshore converter station, a feasible technical scheme for the key electrical technology was given.

  Result  With the gradual popularization of offshore wind power 66 kV collection system, intensive offshore wind power flexible direct transmission will become the mainstream design scheme in the future. In this paper, the research conclusions with guiding significance were given for the key electrical technology points of intensive offshore converter station.

  Conclusion  Compared with the traditional converter station, the intensive offshore converter station has obvious technical advantages. The research conclusions formed in this paper can provide technical support for the scheme decision-making and implementation of deep sea large-scale offshore wind power transmission project in the future, and have a good demonstration application prospect.