The large-scale integration of wind power into the grid has led to increasingly prominent broadband resonance problems. Industry experts believe that cable capacitance effects, controller parameter changes, etc. are the main factors causing resonance. However, research on the inherent causal relationship between the static var generator (SVG), wind power changes, and high-frequency resonance has not yet been conducted. This paper focuses on the high-frequency resonance problem of low wind speed wind field systems. First, based on harmonic linearization theory and considering the effect of the power outer loop, the sequence impedance models of an SVG and a doubly fed induction generator (DFIG) are established. The wind speed changes are incorporated into the modeling of the wind turbine inverter, and the relationship between wind speed changes and SVG impedance is established when the no-load cable is put into operation. The impedance interaction is used to reveal the mechanism of the influence of wind turbine inverter impedance changes on SVG impedance characteristics. It is pointed out that after the deployment of unloaded cables in the area, low wind speed not only reduces the robustness of the system at high frequencies, but also expands the negative damping range of the SVG at high frequencies, leading to an increase in the risk of high-frequency resonance in the system. Finally, a doubly fed wind field electromagnetic simulation model containing an SVG is constructed based on STARSIM-HIL, and software and hardware in-the-loop experiments are conducted. The experimental results proved the correctness of the theoretical analysis.