The publication of the draft 'Requirements for Generators 2.0' paved the way for grid-forming inverters to be integrated. Many manufacturers are now launching the first such devices on the market. However, these are designed for use with battery storage systems. The grid-forming operation of renewable energy systems, such as photovoltaic plants, is still a subject of ongoing research.

Against this background, this paper examines an AC-coupled hybrid system comprising a grid-following photovoltaic unit and a grid-forming battery storage unit. The aim is for this hybrid system to operate in accordance with the requirements of RfG 2.0 at its grid connection point. Therefore, the normative requirements are first outlined. Within the scope of this work, more detailed specifications refer to the requirements of the German VDE-FNN for grid-forming inverters. Based on these requirements, a realistic model of the hybrid system for the high-voltage range is shown, consisting of unit models, transformers, and a park controller. The specific dynamic characteristics of the PV and battery storage units are considered. Suitable scenarios are developed to validate the system behaviour through simulation in accordance with the RfG 2.0 specifications. The park controller coordinates the various grid-supporting functions of the units, enabling the entire plant to operate in a grid-forming behaviour at the grid connection point.