文献类型：会议论文

英文题名：Coordinated operation control on low DC voltage of HVDC integrating wind farms

作者：Zhang, Qingzhi[1]; Zhao, Chenggong[2]; Du, Chuan[1]

第一作者：张清枝

通讯作者：Zhang, Qingzhi

机构：[1] College of Mechanical and Electrical Engineering, Xinxiang University, Xinxiang, China; [2] XJ Electric Company Limited, Xuchang, 461000, China

第一机构：新乡学院机电工程学院

语种：英文

外文关键词：Electric power system interconnection - Electric utilities - Integration - Permanent magnets - Wind power

摘要：In recent years, with the development of high voltage direct current (HVDC) transmission technology, wind power integration with modular multiple converter-HVDC (MMC-HVDC) has been widely researched and applied. However, the conventional control methods on wind power integration cannot match the flexibility needing of loads. In this paper, a wind power integration system with permanent magnet direct-drive wind farm and full-bridge MMC is proposed. It has the characteristics of independent control of AC and DC current, which can realise the stable operation of the system under low DC voltage, so that to effectively avoid the accident of the wind turbine cut-off caused by the load reduce. When the DC voltage drops, the system can maintain a constant AC voltage at the wind power integration point, so that the wind farm can operate normally. Finally, the simulation results in PSCAD/EMTDC show that the proposed system and its control strategy are correct. ? 2019 Institution of Engineering and Technology.All right reserved.