摘要
在平价上网的成本压力下,远海规模化开发和采用大容量风电机组是提高海上风电经济性的重要方式。为了对远海风电大容量机组集电方式进行技术经济研究,分析了远海风电交流和直流集电方案,包括35 kV交流集电、66 kV交流集电、串联升压直流集电和并联辐射直流集电方案,对远海风电典型工况下不同集电系统方案进行了技术经济比较。在此基础上,总结了平价上网时代下海上风电的集电系统解决方案和技术发展趋势,提出了未来远海大规模海上风电平价上网开发建设的技术路线。66 kV集电方案配合柔性直流能取消海上升压站,可大幅降低设备投资成本,有利于中短期内平价上网的实现。未来,随着电力电子技术的进步,采用全直流技术能减少电能多级升压环节,提高传输效率,具有更加优良的应用前景。
Under the cost pressure of grid parity,offshore large-scale development and adoption of large-capacity wind turbines are important ways to improve the economics of offshore wind power.In order to conduct a techno-economic study on the collection methods of large capacity turbines for offshore wind power,the AC and DC collection schemes for offshore wind power,including 35 kV AC collection,66 kV AC collection,series boost DC collection and parallel radiation DC collection schemes,are analyzed,and the techno-economic comparison of different collection system schemes for offshore wind power are conducted under the typical operating conditions.On this basis,the collection schemes and technology development tendency for offshore wind power in the era of grid parity are summarized.The 66 kV AC collecting solution,together with the flexible DC transmission system,can cancel the offshore booster station and significantly reduce the equipment investment cost,which is conducive to the realization of grid parity in the short and medium term.In the future,with the progress of power electronics technology,the use of all-DC technology can reduce the multi-stage step-up link of electrical energy and thus improve transmission efficiency,which will have a better application prospect.
作者
谭振龙
张伶俐
陈希
吕宙安
蔡文畅
TAN Zhenlong;ZHANG Lingli;CHEN Xi;LV Zhouan;CAI Wenchang(China Three Gorges Renewables(Group)Co.,Ltd.,Beijing 101100,China;China Electric Power Planning&Engineering Institute,Beijing 100120,China)
出处
《电气应用》
2021年第6期64-71,共8页
Electrotechnical Application
基金
中国长江三峡集团有限公司科研项目(202003368)。
关键词
大容量机组
交流集电
直流集电
技术经济比较
large capacity turbines
AC collection
DC collection
techno-economic comparison
作者简介
谭振龙(1990-),男,硕士,工程师,助理研究员,从事新能源发电与并网技术经济研究及咨询规划工作。
