摘要
随着海上风场的大规模化发展,如何经济有效地将分散在海上各处风场所发电能汇聚并传输至岸上成为一个亟待解决的问题。对比传统海上风电场的交流汇聚、直流传输,全直流风场以其体积小、容量大、效率高等优势,引起学界广泛关注。作为全直流风场中的关键设备,多端口直流变电站起着重要的汇聚与传输风能的作用。该文基于模块化多电平结构,针对可能应用于全直流风场中的几种多端口直流变电站拓扑,从变比、故障隔离、容量等几方面展开详细分析与对比,并就在不同场合下应选择何种拓扑作出建议。并提出应用于海上直流风场中的多端口直流变电站最优拓扑。
With large-scale development of offshore wind farms, to design a cost-effective collection and transmission grid for distributed wind power has become a vital problem. Compared with conventional AC collection and DC transmission in offshore wind farm, DC wind farm, with its smaller size, larger capacity, higher efficiency and many other advantages, are getting more and more attention. As a key equipment in the DC wind farm, the multi-port DC-DC substation collects and transmit the wind power. Based on MMC structure, this article presents several possible topologies of the multi-port DC-DC substation applied in the DC wind farm. Moreover, these topologies are analyzed and compared related to ratio, capacity, fault isolation and other aspects. Recommendations about the choice of substation topology under different occasions are given as well as applied in offshore DC wind farm. © 2016 Chin. Soc. for Elec. Eng.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2016年第S1期61-68,共8页
Proceedings of the CSEE
基金
国家电网科学技术合作项目(直流电网用高压DC/DC变换器前期技术研究)~~
关键词
海上直流风电场
多端口直流变电站
模块化多电平
拓扑比较
Cost effectiveness
Electric power system interconnection
Electric utilities
Topology
Wind power
