Voltage flicker assessment of a weak system integrated wind farm

The subject of this paper is voltage flicker prediction and mitigation in the wind farm. Wind energy conversion systems produce fluctuating output power, which may cause voltage fluctuations and flicker. Accurate models for voltage flicker prediction are required so that large wind turbines may be connected to weak utility networks, in the confidence that excessive flicker levels will not occur. The problem is that flicker prediction in networks may be difficult since its evaluation requires long field testing time.This paper presents an analysis and the modeling of the flicker emission of wind turbines. Measurements compared with international standards(IEC 61000-4-15 and 61400-21) are discussed. It gives error analysis and correction method of the model. In addition, the error analysis of the demo model in MATLAB/SIMULINK is also discussed.