Enhanced Sufficient Battery Model for Aggregate Flexibility of Thermostatically Controlled Loads Considering Coupling Constraints

This letter proposes an enhanced sufficient battery model (ESBM) as well a binary search algorithm for improved inner-approximation of the aggregate flexibility thermostatically controlled load (TCL) arrays. Compared with previous work on generalized models, our ESBM preserves merits being and reduces conservativity. Moreover, unlike works ignoring coupling constraints (e.g., regarding distribution network where TCL individuals are physically connected) that may significantly restrict TCLs' flexibility, can readily handle these constraints. Numerical tests validate significance using power system operations.