Transient Model Integrated Power Flow and Its Application in Electromagnetic Transient Simulation Initialization

With the integration of numerous complex electrical devices, the increasing complexity of China's power grid has great influence on power flow calculation. In this work, a general transient model integrated power flow (TMIPF) method for complex systems is proposed, which solves the steady-state model and complex transient model by conventional power flow method and simulation method respectively, and adopts the Thevenin equivalence and fixed-point iteration to provide the power flow of the entire complex system. Then, the TMIPF results are utilized to initialize the hybrid AC-DC system electromagnetic transient (EMT) model, and the hybrid AC-DC system EMT model combining IEEE 39-bus system with the CIGRE HVDC system is built on the CloudPSS platform. Test results indicate the effectiveness and accuracy of the proposed TMIPF method, and validate the feasibility of TMIPF's application in EMT simulation initialization.