2024 年 21 巻 5 号 p. 20230558
With the continuous development of new energy generation and power electronics technology, Virtual Synchronous Generator (VSG) technology has been widely applied. VSG technology achieves power exchange between the DC side and the system by controlling the inverter. Traditional VSG control strategies suffer from issues such as long transient adjustment times, poor stability, and steady-state deviations. To address these challenges, this paper proposes an adaptive parameter control strategy for a virtual synchronous generator with transient damping characteristics. Initially, transient damping is introduced on the basis of the traditional constant damping strategy to eliminate the steady-state error during the primary frequency control of the system under grid frequency fluctuations. Subsequently, an analysis is conducted on the dynamic behavior of the VSG by examining the trends in variations of its rotational inertia and damping coefficients under system oscillations, an inertia damping adaptive control strategy is proposed. Finally, a simulation model of the system is constructed using MATLAB/Simulink, and this control strategy is compared with existing strategies through simulation. The results demonstrate that this control strategy enhances the transient performance of the VSG system, improves system stability, and reduces steady-state errors.
