Study on Transient Voltage Stability of Receiving-End Power Grid Considering the Difference in Location and Scale of New Energy

In the context of large-scale integration of new energy and DC access to the receiving-end power grid, the transient voltage stability problem greatly restricts the feed-in capacity of DC and new energy, and further research is urgently needed on the influence of new energy integration on the transient voltage stability of the receiving-end power grid. This paper first theoretically derives and proposes a transient voltage stability analysis model and method for the receiving-end power grid that takes into account the impact of new energy access. Then, based on the analysis model of the receiving-end power grid, analyze the impact of new energy access on the voltage of the receiving-end power grid central bus. Finally, the impact of large-scale new energy integration on the transient voltage stability of the receiving-end power grid was analyzed through simulation. The research results indicate that the transient $\mathbf{P}-\mathrm{V}$ curve method based on transient power flow profiles is also applicable for transient voltage stability analysis of new energy access power systems, and compared with engineering criteria, it is more accurate in judging transient voltage stability.