A structure-preserving time-domain analysis for power electronic-interfaced systems

With the penetrations of large-scale renewable energy, improving the simulation efficiency while reserving the interested dynamics is important for analysis of the power electornic-interfaced systems. In order to improve the simulation efficiency and carry out stability analysis of power electronic-interfaced systems, strcture-preserving reduced order methods are proposed. In these methods, the whole system is decoupled as fast and slow subsystems based on the singular perturbation theory, deriving the reduced order models of the whole system. These models can both achieve much improvement of simulation efficiency while analyze the stability of the whole system. Simulation results of a practical power system demonstrate the advantages of the proposed method.