集约式海上换流站电气应用技术研究

  目的  深远海大规模海上风电送出会选用大容量风机和66 kV集电系统，风机具备直接接入海上换流站的条件，从而可以取消海上升压站，实现集约式设计。针对集约式海上换流站需要关注的电气关键技术点开展初步研究。  方法  在现有海上风电柔性直流输电技术的基础上，通过研究集约式海上换流站的主回路拓扑结构、核心电气设备选择和平台布置方案优化，对电气关键技术点给出了切实可行的技术方案。  结果  随着海上风电66 kV集电系统的逐渐普及，集约式海上风电柔直送出将成为以后的主流设计方案。针对集约式海上换流站的电气关键技术点给出了具有指导意义的研究结论。  结论  集约式海上换流站相比传统海上换流站具有明显的技术优势，形成的研究结论可以为后续深远海大规模海上风电送出项目的方案设计和实施提供技术支持，具有很好的示范应用前景。

Research on Electrical Application Technology of Intensive Offshore Converter Station

  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.