A Virtual Synchronous Generator System and the Control Technology Research

With the increasing integration of wind and solar power generation into the power grid, virtual synchronous generator (VSG) has become a primary research object. Combining the inverter control strategy to compensate for the performance of synchronous generators, also can provide voltage support and inertial support characteristics. This paper presented the topology and mathematical modeling of the VSG and detailed operating strategies for P/F and Q/U have been established. Then a simulation model is developed on MATLAB platform to study the transient synchronization characteristics of the VSG. The anti-interference, robustness and grid distortion rate of the VSG under the different cases are researched. By adjusting control parameter variables, the impact of inertia damping on system output power is analyzed. This technology reduces the difficulty of grid connection and the harmonic distortion rate, improving dynamic stability and overshoot. Besides, this technology also provides the inertia and damping of synchronous generators, improving the anti-interference and robustness for the power grid.