With the high penetration of renewable energy being integrated to the power grid

the weakening of voltage support has accentuated the challenges of transient voltage stability in power systems. To address the above issues

a data-driven analysis method for key influencing nodes of transient voltage stability in power systems is proposed. Firstly

the voltage stability mechanism of the power system and the transient voltage stability evaluation indicators are analyzed. Subsequently

the arbitrary polynomial chaos are used to model the correlation between the transient voltage stability of the system and the influencing factors

and the coefficients of the polynomial expansion terms are calculated using a non-intrusive probabilistic collocation method. Finally

the Sobol index is introduced to define the global sensitivity of transient voltage and quantify the influence of each parameter on the transient voltage stability of the system. The results show that the method proposed in this paper can be adopted to quickly and accurately analyze the influence of each parameter on the transient voltage stability of the power system.