COLLABORATIVE ADAPTIVE CONTROL STRATEGY FOR ROTOR INERTIA AND DAMPING COEFFICIENT OF VIRTUAL SYNCHRONOUS GENERATOR

As an effective method for renewable energy integration, virtual synchronous generator (VSG) control strategy of grid connected inverter has attracted more and more attention. In order to reduce power overshoot and speed up frequency response, a collaborative adaptive rotor inertia and damping coefficient control strategy of VSG is proposed．Interval judgement indicators of angular frequency offset degree and relative deviation are defined according to the active frequency characteristic curve of the system and the relationship between the virtual rotor inertia and damping coefficient and the system. Then, eight system oscillation intervals are proposed combining the change law of the system frequency change rate. Virtual rotor inertia and damping coefficient are adjusted collaboratively and adaptively by integrating the judgment index and interval. The proposed algorithm is verified by simulation results based on a MATLAB/Simulink VSG model. © 2022, Politechnica University of Bucharest. All rights reserved.