近海可再生能源综合发电的系统构建与并网方式

Hybrid Offshore Wind, Wave and Tidal Turbine Energy Conversion System: Structure and Electrical Interface

为了提高近海可再生能源的利用率和发电装置的可靠性,提出了一种融合近海风电、波浪能发电以及潮流能发电的近海可再生能源综合发电系统。设计了系统结构,采用导管架式基础平台结构固定3种发电装置。针对近海风电和潮流能发电可能采用不同发电机类型,提出了综合发电系统的3种并网连接方式,并通过时域仿真对不同的并网方式进行了比较。仿真结果表明:3种并网连接方式下,综合发电系统的输出功率均能够跟踪输入信号的变化;当电网侧发生扰动,近海风电和潮流能发电采用直驱永磁同步发电机时,综合发电系统的动态响应最佳。

To improve the efficiency of the offshore renewable energy generation and the reliability of the power generation device, a hybrid offshore renewable energy conversion system, consistitag of offshore wind, wave and tidal power generations, was proposed in this paper. System structure was designed based on the offshore jacket platform. Since different types of generators were proposed for the offshore wind and tidal power generation systems, three types of electrical interfaces of the hybrid system were presented and compared by the dynamic simulations. The results indicate that for the above three types of the electrical interfaces, the outputs of the hybrid system can track the variations of the input signals. If a grid-side fault occurs, the dynamic performances of the hybrid system with the third type of the electrical interface, i.e., the direct-drive permanent magnet generators being used in the wind and tidal power generation devices, are better than those with the other two types of the electrical interfaces.