METHOD FOR ANALYZING OPERATION STATE OF SUBSTATION BY COMBINING WHOLE GRID MODEL WITH LOCAL GRID MODEL

摘要

The disclosure relates to the crossing field between a power transmission of an ultra-high-voltage and a power system simulation, specifically a method for analyzing an operation state of a substation by combining a whole grid model with a local grid model is provided according to the disclosure. The method includes following steps: performing a load flow calculation for the provincial grid to which a ultra-high-voltage line belongs, wherein initial data of the load flow calculation employs a grid model with E format for national power grid dispatching control center; making an equivalent transform for the model, forming an island independently from the provincial grid to which a ultra-high- voltage line belongs, and making a load flow calculation for the island to acquire data of node voltages and line transmission power.