故障穿越策略对混合风电场及系统的影响

The Influence of Fault Ride Through Strategy on Hybrid Wind Farm and System

风电渗透率的增加使得风电并网的不稳定性和故障穿越等问题亟待解决。考虑到分期建设或新旧风机更换导致的同一风电场有不同种类风机的现象,在MATLAB/Simulink仿真平台上,建立包括普通异步风机、双馈异步风机的混合风电场经VSC-HVDC并网模型。以升频法和降压法为例进行比较仿真,在验证其可行性的基础上,探讨不同故障穿越方法对不同种类风电机组和VSC-HVDC的影响。研究结果对实际风电场并网控制策略的选择有一定参考价值。

The increase of wind power permeability makes the problems of instability and fault ride through of wind power integration need to be solved urgently.Considering the different types of fans in the same wind farm due to staged construction or the replacement of the old fans with new ones,a hybrid wind farm system model via VSC-HVDC grid connection including FSIG and DFIG is established in the MATLAB/Simulink simulation platform.Taking the typical frequencyboost and voltage-drop method as an example,on the basis of verifying its feasibility,the influence of different fault ride through methods on different types of wind turbines and VSC-HVDC is studied.The research results have a certain reference value for the selection of actual wind farm cutting-in control strategy.