The frequency control of micro smart grid is a very important issue to satisfy the power quality conditions. For this objective, this paper proposes a new optimization technique based on mine blast algorithm (MBA) for optimizing the gains of the blade pitch PID controller of the wind turbine generator for enhancing the performance of the hybrid wind-diesel system. Simulation has been carried out with a step disturbance in wind input and load power. Furthermore, system performance is studied for harsh step load and wind disturbance with changing the fluid coupling between wind and diesel systems. The wind and diesel frequency and power deviations are obtained and discussed. The results of the proposed system are compared with classical PI and GA PID controllers. Results prove that the MBA-based scheme is able to damp the oscillations in the system frequency responses by reducing the overshoot, settling time and steady-state error compared to other systems.