Abstract：In the flexible VSC-HVDC, this paper proposed a control Strategy based on DD-PMSG seriesl topology offshore wind farm in grid voltage drop. During LVRT, generator side converter controls the DC bus voltage and take weak magnetic control when output voltage of generator is saturation.Grid side converter deliver reactive power to grid, maintain the total DC voltage stability.And coordinated control pitch angle of PMSGs, adjust speed of all PMSGs in series topologuy effectively.,make the wind farm store more wind energy in the security and stability. Achieve LVRT during grid voltage drop. The result of simulation proved that the scheme is running stable during grid voltage drop, can achieve good coordination control to speed of multi-generators, which could be used to the engineering practice.
黄晟,王辉,廖武,黄守道. 基于VSC-HVDC海上串联拓扑风电场低电压穿越控制策略研究[J]. 电工技术学报, 2015, 30(14): 362-369.
Huang Sheng,Wang Hui,Liao Wu,Huang Shoudao. Control Strategy Based on VSC-HVDC Series Topology Offshore wind Farm for Low Voltage Ride Through. Transactions of China Electrotechnical Society, 2015, 30(14): 362-369.
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2015, Vol. 30 
