Data generation strategy of power flow calculation for AC/DC hybrid system

In this paper, from the four main steps of topology transformation, network topology analysis, equipment modeling and data generation strategy, the CIM/XML data including AC/DC system is converted to the input data of power flow calculation. Firstly, from the perspective of switching topology between devices, Depth First Search algorithm (DFS) search and device topology splicing are carried out to realize the conversion from switch/node model to bus/branch model. Secondly, after the active topological islands are screened and the non-live devices are eliminated, the influence of the converter modeling in CIM/XML on the selection of AC and DC nodes is emphatically analyzed, and then the selection rules of DC nodes and the strategy of DC data generation with universality are proposed. Finally, taking the CIM/XML data derived from the Southern power grid of China with a voltage of 500kV and above as an example, the power flow calculation results are compared with the measured SCADA data to verify the effectiveness of the proposed strategy.