Abstract:To effectively evaluate the transient stability of modern complex power systems, this paper proposes a reliable data-driven transient voltage stability discrimination method for the load side. Firstly, the types of load models were introduced, and the mechanism of transient voltage instability in dynamic loads was explored. Secondly, introduce the stability discrimination principle and solution mechanism of MLE. Then, the MLE-t curve of the load side voltage amplitude trajectory is simulated using the MLE algorithm. Finally, based on the simulation results curve, an analysis is conducted to construct a criterion for transient voltage instability on the load side. The results show that the proposed load side transient voltage instability criterion based on Lyapunov exponent can accurately determine the voltage instability on the load side, which will provide important reference for the safe and stable operation of power systems.