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| Voltage Source Control of Offshore All-DC Wind Farm |
| Yang Renxin, Shi Gang, Cai Xu |
| Wind Power Research Center School of Electronic Information and Electrical Engineering Shanghai Jiao Tong University Shanghai 200240 China |
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Abstract In order to solve the problem of reactive charge current and overvoltage in wind farm AC collection grid, all-DC wind farm using DC collection and transmission is becoming a viable option for large-scale offshore wind power collection and integrating to grid. In this paper, a novel coordinated control method for all-DC farm has been proposed to solve the problem of inertia loss. This method included inertial synchronization control of onshore converter station, fast voltage regulation of DC booster station, inertial response and primary frequency regulation control of DC wind turbine. With this method, the all-DC wind farm behaved like a synchronous generator (SG) with the capability of inertial response and primary frequency regulation, which realized the voltage source control of all-DC wind farm. An all-DC wind farm test system was modeled in PSCAD/EMTDC software, which proved the validity of proposed control strategy.
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Received: 28 June 2018
Published: 15 February 2019
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2018, Vol. 33 
