Microgas turbine distributed generation system model with dual PWM converter structure was studied. Permanent magnet synchronous machine side and grid side converters' control systems were designed on the basis of the droop characteristics. This control scheme could regulate permanent magnet synchronous machine speed and converter DC voltage. A dynamic model of microgas turbine distributed generation was built with Matlab, and simulations were completed under different load conditions. The result has shown that this model has good stability when the load suddenly changes. Rotor inertia response was introduced into this system, which improved the system′s dynamic quality,so the whole micro system can endure a big load mutation.