Voltage source control of offshore all-DC wind farm

The Journal of Engineering

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[1] School of Electronic Electrical and System Engineering, University of Birmingham, Birmingham, UK;Wind Power Research Center, Shanghai Jiao Tong University, Shanghai, People's Republic of China;

关键词: offshore installations;    frequency control;    power generation control;    synchronous generators;    frequency response;    wind power plants;    power grids;    all-DC wind farm;    grid frequency stability;    coordination control strategy;    onshore grid frequency changes;    voltage source control;    constant ratio control;    DC transformer;    inertia synchronising control;    weak grid condition;   

DOI  :  10.1049/joe.2018.9292

来源: publisher

【 摘 要 】

The fast growth of offshore all-DC wind farm will bring problems such as the weakening of grid frequency stability and the increase of equivalent grid impedance. To overcome this, a coordination control strategy for offshore all-DC wind farm is proposed in this study with two salient features: better performance under weak grid condition, and real-time frequency support from wind farm. This strategy consists of three parts: the inertia synchronising control of receiving end converter, the constant ratio control of DC transformer and the frequency response of wind farm. With the proposed strategy, the all-DC wind farm operates like a synchronous generator to onshore grid, which provides fast frequency support when the onshore grid frequency changes. The effectiveness of the proposed method is validated in PSCAD/EMTDC.

【 授权许可】

CC BY