大容量海上柔性直流换流站紧凑型布置研究

Research on Compact Layout of Large Capacity Offshore Flexible DC Converter Station

[目的]由于国外厂家的技术封锁,我国在大容量海上柔性直流输电技术的应用研究仍处于空白阶段。文章针对大容量海上柔性直流换流站提出了一种既满足工艺流程要求,又最大程度减少平台尺寸的紧凑型布置方案。[方法]根据功能定位和工作原理,可将换流站分为交流场、阀厅、桥臂电抗器区域、直流场和辅助房间五大区域。通过对各区域的布置原则研究给出了推荐的布置方案。[结果]紧凑型的布置方案对提升海上换流站的可靠性、减少施工及维护检修工作以及降低工程总体造价具有重要作用。[结论]柔性直流输电正向大容量、高电压、远距离输电方向不断发展,是大容量海上风电送出的最佳应用方案,研究提出的紧凑型布置方案能够对大容量海上柔性直流换流站起到很好的指导作用,具有较高的参考价值。

[Introduction]Due to the technology blockade by foreign manufacturers,the research on the application of large capacity offshore flexible DC transmission technology in China is still in a blank stage.The paper presents a compact layout scheme for the large capacity offshore flexible DC converter station,which not only meets the requirements of process flow,but also minimizes the size of the platform.[Method]According to the function orientation and working principle,the converter station could be divided into five areas:AC field,valve hall,bridge arm electric reactor area,DC field and auxiliary room.Through the study of the layout principle of each area,the recommended layout scheme was given.[Result]The compact layout plan plays an important role in improving the reliability of the offshore converter station,alleviating construction and maintenance work and reducing the overall cost of the project.[Conclusion]Flexible DC transmission is developing towards the direction of large capacity,high voltage and long-distance transmission,which is the best proposal for large capacity offshore wind power output.The compact layout scheme proposed in the paper can play a good role in guiding the large capacity offshore flexible DC converter station,and has a high reference value.