As an important kind of renewable energy, wind power is developing rapidly, but the large-scale grid-connected operation of wind power has caused new problems different from the traditional power system. Wind turbines is operated with the active and reactive power decoupling strategy and synchronize with the power grid by phase-locked loop as now, thus reducing the effective inertia of the power grid and reducing the stability of the power grid frequency. This paper focuses on the reduction of effective inertia caused by large-scale wind power grid connection, taking the widely used doubly-fed induction generator as an example, proposes an adaptive strategy of virtual inertia parameters based on the improvement of bang-bang control, and effectively suppresses the frequency change of the power grid by controlling the adaptive parameters to deal with the frequency change condition of inertial response and to provide inertial support. This control strategy is simulated, and the simulation results verify the correctness and validity of the strategy.