Inverter-Based Resources (IBR) refer to power source resources that are connected to the power grid through power electronic inverters and supply power to it. These resources do not directly generate alternating current (AC), but convert the internally generated direct current (DC) or variable frequency current into alternating current (AC) at the standard grid frequency (such as 50 Hz or 60 Hz) and operate in grid connection through inverters.
Technical Features:
Not dependent on rotating mechanical inertia: Unlike traditional synchronous generators, IBR does not have inherent rotational mass.
Grid interface is an inverter: All control (voltage, current, frequency response) is realized by software and controllers.
Fast response and programmable: Suitable for flexible scheduling and participating in grid auxiliary services.
Lack of inertia support: In high proportion IBR grids, system frequency stability faces challenges.