Abstract: The grid integration of large-scale offshore wind farms exerts significant adverse impacts on power systems in terms of voltage deviation, voltage fluctuation, flicker, and harmonics. Taking Hainan D Offshore Wind Farm as the research object, this paper analyzes the power compensation capacity of static var generator (SVG), as well as the corresponding limit values of relevant power quality indicators at the 220 kV point of common coupling. It also examines the voltage deviation and fluctuation and flicker values caused by switching operations in the 0% to 100% output range under four typical operating conditions of the wind farm. The impact of 2nd to 25th harmonic current and voltage distortion rates on the system is simulated and analyzed. The results indicate that all indicators of D Offshore Wind Farm comply with national standard limits, and the grid connection scheme is technically feasible, and the obtained results can provide reliable engineering references for the power quality assessment of similar large-scale offshore wind power grid integration projects.

Key words: offshore wind farm, voltage deviation, flicker, harmonic, power quality, reactive power compensation