文献类型：期刊文献

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, QZ[1]

机构：[1]Xinxiang Univ, Coll Mech & Elect Engn, Xinxiang, Henan, Peoples R China;[2]XJ Elect Co Ltd, Xuchang 461000, Peoples R China

第一机构：新乡学院机电工程学院

通讯机构：[1]corresponding author), Xinxiang Univ, Coll Mech & Elect Engn, Xinxiang, Henan, Peoples R China.|[1107111]新乡学院机电工程学院;[11071]新乡学院;

年份：2019

期号：16

起止页码：2348-2353

外文期刊名：JOURNAL OF ENGINEERING-JOE

收录：WOS:【ESCI(收录号:WOS:000469467100329)】；

基金：This work was sponsored by 2016 Henan Provincial Key Universities and Research Projects (16A470013) and 2018 Henan Science and Technology Research Project (182102210121).

语种：英文

外文关键词：wind power plants; power grids; HVDC power convertors; HVDC power transmission; wind turbines; coordinated operation control; low DC voltage; HVDC integrating wind farms; HVDC transmission technology; MMC-HVDC; conventional control methods; wind power integration system; direct-drive wind farm; independent control; wind turbine cut-off; DC voltage drops; constant AC voltage; wind power integration point; control strategy

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.