在输配一体化系统两阶段鲁棒机组组合中融入频率安全约束

With the integration of high-proportion renewable energies, the independent operation of the transmission and distribution systems (T&DSs) makes it difficult to achieve optimal scheduling and ensure frequency security. Therefore, this paper proposes a two-stage robust frequency-constrained unit commitment (TRO-FCUC) model of T&DS. Firstly, the impacts of distributed energy resources (DERs) frequency regulation capabilities on inertial response and primary frequency response (PFR) are considered, and dynamic frequency constraints considering the cooperation of thermal units, wind farms, and DERs with their inertia-based frequency reserve are constructed. Then, the TRO-FCUC model is formulated to address uncertainties of wind farms (WFs) and distributed photovoltaics (DPVs) based on uncertainty sets. Further, the column and constraint generation (C&CG) algorithm and strong duality theory are utilized to transform the TRO-FCUC model into a mixed-integer second-order cone programming (MISOCP) model and then solve it iteratively. Finally, case analyses proposed demonstrate that the coordinated operation of T&DS can fully mobilize the frequency regulation potential of DERs and improve the operation’s economy while ensuring the frequency security of the system.