VSG Integrated Control Strategy Based on Hamilton Theory

As the penetration rate of new energy generation continues to grow, the weak inertia and underdamping characteristics of the traditional power electronic converter interface will have a negative impact on the stable operation of the power grid. To solve this problem, firstly, a third-order VSG control model considering excitation control is established, and the control law is obtained based on the dissipative Hamilton system method to improve the stability of the system while preserving the nonlinearity of the system. At the same time, a comprehensive adaptive control strategy for the moment of inertia and damping coefficient is proposed, which makes full use of the flexible and adjustable technical advantages of the VSG to suppress the power oscillation of the power system. Finally, using MATLAB/Simulink and DIgSILENT software simulation analysis and verification of the effectiveness and robustness of the designed control strategy.