In view of the insufficient inertia and damping in islanded microgrids, flywheel energy storage units have been introduced，followed by the construction of a load frequency control model for an isolated microgrids with flywheel energy storage units, with a focus on the impact of communication delay on islanded microgrid systems. The applicable Lyaunov Krasovskii functional (LKF) has been adopted for the definition of the derivative integral term through the generalized free weight integral inequality, thus obtaining a delay related stability criterion. When considering the impact of electric vehicle battery state on system gains, the system is treated as a parameter uncertain time-delay system. Based on different parameter settings, simulation experiments are conducted, with the results verifying the effectiveness and superiority of the method proposed in this paper.