Optimal Switching Sequence of Urban Power System Based on Dynamic Thermal Rating Parameter Adjustment

With the emergence of flexible topology technology in UPSs, the number of breaker action has increased, making the sequence more important. In addition, during the switching process, In addition, short-term violations may occur, such as line overloading, which can necessitate additional corrective operations to maintain the stability and reliability of UPS. In response, this article proposes the use of dynamic thermal rating (DTR) technology to replace the existing overload judgment conditions and accurately evaluate the risk of the changing process. To improve the accuracy of the key parameters in DTR model, this paper also proposes a real-time feedback correction framework. Finally, a comprehensive evaluation model is constructed that takes into account node voltage to assess the operation sequence of dynamic line overload, which provides assistance for the switching of the power grid state. Simulation results show that the proposed feedback correction scheme improves the accuracy of the DTR model, and the comprehensive evaluation model effectively solves the optimal sequence problem of long-time, multi-switch stepping operations, improving system stability.