A large number of dynamic loads are incorporated in modern power systems, and their types are not the same. Dynamic loading its own volatility will inevitably have a certain degree of impact on modern power system dynamics, and ultimately affect voltage stability. In order to explore the number of dynamic loads and their impact on the power grid, this article uses the DIGSILENT POWERFACTORY 2022 as the platform to establish a large-capacity Nordic power system model. The load is replaced with different proportions, which aims to determine the relationship between the details of various power distribution systems and the large-capacity power system STVS. The RMS simulation and results data analysis reveal the mutual coupling effects of more details between the dynamic load, and at the same time show the necessity of the polymerization model on dynamic characteristics. Based on an inspiration method that generates a large data set by performing a large number of simulations, the impact of the dynamic load on short-term voltage stability, and which type of dynamic load is beneficial or harmful to the modern power system. And the unstable results are analyzed in detail to further explore the impact of the stability of short-term voltage stability of the additional failure position, and also verify the impact of dynamic load type on short-term voltage stability. The study enhances the impact of dynamic load interactions in modern power systems on short-term voltage stability and emphasizes the importance of more accurate future modeling and data analysis.