A high-permeability wind-driven power system wind power branch mode energy analysis method belongs to the technical field of power system operation and maintenance. The method constructs a simple andvisualized wind-driven power system wind power branch mode potential energy function with a clear physical meaning by modeling the wind-driven power system wind power branch mode energy, can accordingly analyze the composition and the variation law of the wind power branch mode potential energy, studies the influence of the change of the branch mode potential energy on the small disturbance stability of the system, can also analyze the sensitivity to state variables of the wind power branch mode potential energy, analyzes the sensitivity to different state variables, and controls and suppresses the low-frequency oscillation by adjusting the state variables. The method constructs a simulation example, compares the wind power branch mode potential energy measured after disturbance with the frequency-domain mode potential energy, verifies validity, and has a high practical value.