Full electromagnetic transient simulation for large power systems

Abstract

For building Global Energy Interconnection (GEI), it is necessary to implement new breakthroughs on large- power system simulation. Key routes for implementing full electromagnetic transient simulation of large-power systems are described in this paper, and a top framework is designed. A combination of the new large time step algorithm and the traditional small-time step algorithm is proposed where both parts A and B are calculated independently. The method for integrating the Norton equivalence of the power electronic system to the entire power grid is proposed. A two-level gird division structure is proposed, which executes a multi-rate parallel calculation among subsystems and element parallel calculation in each subsystem. The initialization method of combining load flow derivation and automatic trial-and-error launching is introduced. The feasibility of the method is demonstrated through a practical power grid example, which lays a foundation for further research. Keywords: Global Energy Interconnection, Power system, Electromagnetic transient, Equivalence, Machine-network interface, Parallel calculation, Power electronics, Initialization, Technology framework CLC