Deeply analyze the profound changes in signal patterns, fault patterns, stability patterns, and control patterns brought about by large-scale renewable energy integration. Based on broadband measurement and deep perception technologies, systematically tackle key problems in identifying broadband fault characteristics and analyzing broadband stability mechanisms in new power systems. Innovatively construct an online stability control technology system for large grids with widespread participation of heterogeneous and distributed resources. Independently develop related core software and hardware systems to provide a solid theoretical foundation and technical support for the safe and stable operation of new power systems.