Flexibility Feasible Region Construction and Operation Optimization for Urban Residential Smart Buildings

New‐generation power systems, characterised primarily by high penetration rates of renewable energy, face significant flexibility requirements to ensure their safe, stable, and reliable operation. On the other hand, with the accelerating electrification of urban residential buildings, the increasing adoption of plug‐in electric vehicles, and the development and application of advanced technologies such as the internet of Things (IoT) and building automation systems, future residential smart buildings (RSBs) in cities will possess considerable potential to provide controllable flexibility. This paper first analyzes the limitations and challenges of traditional centralised methods in tapping into and utilising the flexibility of residential buildings. It then introduces, from a novel “region” perspective, the advantages and value of using the feasibility region of residential building flexibility to replace the direct optimization and scheduling of a large number of diverse, dispersed, and heterogeneous flexibility resources. Building on this foundation, it explores the construction and optimization key technologies of residential building flexibility feasibility region (FFR) through a technical route — flexibility identification, flexibility utilization, and maximising the benefits from utilization — and outlines future research directions for related technical issues.