Research on hybrid multi-terminal high-voltage DC technology for offshore wind farm integration

查看全文 作　　者：Peng [1]ZHAN;Chenghao [1]LI;Jinyu [1]WEN;Yu [1]HUA;Meiqi [2]YAO;Naihu [2]LI

机构地区：[1]State Key Laboratory of Advanced Electromagnetic Engineering and Technology,Huazhong University of Science and Technology,Wuhan 430074,Chin;[2]Grid Technology Center(China)Co.Ltd.,Shanghai 201114,China

出　　处：《Journal of Modern Power Systems and Clean Energy》索引2013年第1卷第1期,共8页

基　　金：This study was supported by National Natural Science Foundation of China(No.50937002,No.51190104);National HI-Tech R&D Program of China(No.2011AA05A112). 摘　　要：Multi-terminal high-voltage DC(MTDC)technology is a promising way to transmit large amounts of offshore wind power to the main grids.This paper proposes a hybrid MTDC scheme to integrate several offshore wind farms into the onshore power grids at different locations.A hybrid four-terminal HVDC system comprising two onshore line commutated converters(LCCs)and two voltage source converters(VSCs)connecting an offshore wind farm is constructed in PSCAD/EMTDC.A coordination control scheme based on the VSCs’AC voltage control and the LCCs’DC voltage droop control is designed to ensure smooth system operation and proper power sharing between onshore AC grids.The operational characteristics of the system are analyzed.In addition,a black start-up method without any auxiliary power supply for the VSCs is proposed.The transmission scheme is tested through simulations under various conditions,including start-up,wind speed variation,and the disconnection of one VSC or of one LCC. 关键词：Hybrid multi-terminal HVDC Offshore wind farm Droop control Voltage source converter Line commutated converter

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Research on hybrid multi-terminal high-voltage DC technology for offshore wind farm integration

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