On-line Identification Method of Power Limit Interval of Thermal Stability Section

To meet requirements for safe, stable and economic operation of power system under the increasingly complex and changing condition, an on-line identification method of power limit interval of thermal stability section is proposed in this paper. An optimization model for the Conservative Transfer Capability (CTC) and Total Transfer Capability (TTC) of the thermal stability transmission section is established. Based on screening of key thermal stability mode, the Benders decomposition method is used to reduce and decouple the original problem. The cluster computing platform is adopted to improve calculation speed. The proposed method provides technical means for dispatch operators to accurately grasp the system's security and stability boundaries and dynamically release power transmission capabilities. The analysis of an actual system example verifies the practicability and effectiveness of the proposed method.