Evaluating the OPF Impact on TS in Multi-machine Power System Operations

We propose a new algorithm using a non-linear programming technique for solving the optimal power flows (OPF) and a novel transient energy margin (TEM) with single-shot automatic line reclosing (ALR) for assessing the transient stability (TS) concerning the fault type of symmetrical short-circuit causing the transient power structure changes in the multi-machine hydrothermal power system. This new algorithm is applied to analyze the optimal coordination of power outputs of the generator units impacting the transient stability in multi-machine hydro-thermal power systems. A novel loss factor formula is proposed for calculating and minimizing the network transmission power losses. The typical examples are shown in this article to prove the advantages of the new algorithm.