海上直流风电场研究现状及发展前景  

Research Status and Developing Prospect of Offshore Wind Farm With Pure DC Systems

作　　者：江道灼[1] 谷泓杰 尹瑞[1] 陈可[1] 梁一桥[1] 王玉芬[1] 

机构地区：[1]浙江大学电气工程学院,浙江省杭州市310027

出　　处：《电网技术》2015年第9期2424-2431,共8页Power System Technology

摘　　要：与现有的海上风电场相比,采用直流技术汇集电能和并网的海上直流风电场无需使用笨重且体积庞大的工频交流变压器,也无需对电能进行多次整流、逆变和升压,因而在设备的体积和质量、系统损耗及建设成本等方面均具有明显优势。首先对串联升压型和辐射型2种主要类型的海上直流风电场进行了详细综述,包括其拓扑结构、控制策略、优势和存在的问题;然后详细分析了海上直流风电场的关键设备——高电压、大容量、高增益DC/DC变换器的研究现状,指出了各类DC/DC变换器的优缺点及其在海上直流风电场中的应用前景;最后对海上直流风电场的故障保护问题和经济性问题的研究情况进行了总结。所述内容对中国开展海上风电等海洋能的开发利用具有一定参考价值。Compared with offshore wind farm with AC collection system, offshore wind farm with pure DC system, including DC transmission and collection systems, eliminates heavy and bulky AC power frequency transformers and the needs for multiple power rectifiers, inverters and voltage boost. It shows some brilliant merits, such as smaller size and lighter weight of equipment, higher efficiency and lower cost. This paper firstly summarizes the topologies, control strategies, advantages and existing problems of offshore DC wind farm. Then a detailed discussion is made about high voltage, large capacity and high gain DC/DC converters, which are regarded as the key equipment of offshore DC wind farms. The advantages and disadvantages of different DC/DC converter topologies and their application prospects in offshore DC wind farm are pointed out. Then, the research situation of offshore DC wind farm fault protection is presented. Finally, this paper affirms the prospect of offshore DC wind farm application. The conclusion has value for utilization of ocean energy such as offshore wind.

关 键 词：海上直流风电场 DC/DC变换器 故障保护 永磁直驱风力发电机 

分 类 号：TM614[电气工程—电力系统及自动化]