Multi-Timescale Security Evaluation and Regulation of Integrated Electricity and Heating System

The ability to operate across multiple timescales is vital for the flexibility enhancement of integrated electricity and heating systems (IEHS). Nonetheless, the common dependence on numerical solvers operating in discrete spaces poses a challenge in accurately representing their inherent multi-timescale properties, thereby compromising system security. In response, this paper proposes a novel multi-timescale matching method in continuous space to get rid of resolution constraints, circumventing discretization issues while deriving an explicit formulation for thermal dynamics. This forms the groundwork for establishing the global sensitivity factors to quantify the interdependencies within the IEHS. On this basis, a rolling security evaluation and regulation strategy that is cognizant of the asynchronous behaviors in power and heating systems is tailored. Case studies validate the effectiveness and efficiency of the proposed method to ensure the IEHS’s security.