The Research Of Some Large Grid Interconnected System Stability Problems Based On Eurostag

In this paper, a BPA-Eurostag stability and asymmetric fault of data conversion is completed, on the basis of a regional network BPA-Eurostag power flow trend data conversion in 2005. Based on full appreciation of models and methods of both BPA and Eursotag, the results of models and data conversion between the two simulation software are validated in IEEE-5.The simulations of BPA and Eursotag indicate that BPA-Eurostag data conversion is reasonable and exact.Research on simulating regional power grid interconnected power network with BPA and the actual use of data, analyzing the reason which made the transient stability level of interconnected power network decreased, and testifying that the negative influence of the moment of inertia of receiving sub-system increasing.The last part is simulating cascading failures with Eurostag. It based on the probability method of cascading failures, according to the statistic of history dispatching probability for each protection relay and automatic safety device, therefore, establishing three evaluation indexes to evaluate cascading failures. Finally, adopting FCM (Fuzzy C-means) algorithm to evaluate the samples of cascading failures and determine the weight coefficient of each index, in order to estimate the degree of random factors combination influences cascading failures.