The Strategy of Active Grid Frequency Support for Virtual Synchronous Generator

Virtual synchronous generator (VSG) control is a promising approach for voltage source converters as an interface between new energy sources and the power grid. VSG grid-friendly scheme, which can imitate mechanical inertia of (SG) droop characteristics. Yet, characteristics imitation SG induces frequency variation grid-connected inverter along with characteristic curve, will deteriorate performance grid support during transient process. In this paper, shapes curve disturbance, proposed active support. First, load disturbance extraction strategy high-pass filter applied in method, component effectively extracted to compensate reference traditional control. The actively supported by shaping disturbance. Afterward, H∞ H2 norms are used objective function quantify particle swarm optimization (PSO) algorithm optimize parameters method. With well-optimized filter, further improved. Finally, simulation results hardware loop (HIL) tests verify effectiveness