Research on the Influence of Wind Turbines' Participation in Frequency Modulation on Grid Frequency Characteristics

Abstract

With the increase in the proportion of new energy sources such as wind power and photovoltaics in the power system, the proportion of conventional synchronous generators gradually decreases, and the primary frequency modulation capability of the system gradually weakens, and the risk of frequency instability in the transmission and receiving end grid continues to increase. The use of wind turbines to participate in frequency modulation to enhance the stability of the power grid has become a research hotspot. Based on the PSD-BPA simulation platform, a simulation model for wind turbines to participate in primary frequency modulation is established in this paper, and its control strategy is clarified. The influence of wind turbine pitch angle, frequency modulation dead zone and power change rate corresponding to frequency deviation on the wind turbines frequency modulation capability is studied; Based on actual grid simulation, it is verified that the participation of wind turbines in primary frequency regulation can effectively improve the stability of grid frequency, and the correctness of the model is verified. The research results can provide references for evaluating grid frequency characteristics and related parameter settings after new energy participates in frequency regulation.