Research on the control parameters of grid-forming based on virtual synchronous generator technology

The achievement of the dual carbon goal requires the construction of a new type of power system with new energy as the main body and the integration of source, grid, load, and storage. The reduction of synchronous generators will inevitably lead to a gradual decrease in the inertia and damping of the power system, which in turn will bring stability problems to the power system. Virtual synchronous control is an effective means to improve the active support capacity of new energy for the power grid. Firstly, the difference between grid type and grid type control was introduced. Grid type is essentially a current source, while grid type is essentially a voltage source. Then, based on the control expression and control structure of the VSG (Virtual Synchronous Generator) with grid configuration, a coordinated control method is proposed, where the inertia parameter follows the rate of angular velocity change and angular velocity deviation, and the damping parameter is controlled based on a nonlinear exponential function. Matlab/Simulink verifies that the proposed method effectively adjusts the frequency when power suddenly increases or decreases.