Adaptive Inertia VSG Control Method Involving Power and Power Change Rate

By simulating the inertia and damping characteristics of the synchronous generator, the virtual synchronous generator (VSG) control enables the inverters to provide inertia and damping support for the system, which can effectively improve the frequency stability of the high-scale new energy power system. However, in this control strategy, if the inertia link is set too small, it has no significant effect on the frequency change. If the inertia is set too large, it will lead to system oscillation. Fixed inertia coefficients in traditional VSG control can’t meet the requirements of stable operation of inverters under different working conditions. For this reason, an adaptive inertia VSG control method with power and power change rate is proposed, which limits the frequency change rate of inverters to a certain range and improves the stability of self-organizing power grid. Finally, the effectiveness of this control method is verified by simulation.