Asynchronous parallel simulation of transient stability based on equivalence

An asynchronous parallel method based on equivalence is proposed for transient stability simulation of power system. In the method, the system is partitioned into several interconnected subsystems by geographical location, and the subsystems are equivalent each other at each integration step. Each subsystem utilizes equivalent information from other subsystems to calculate independently. At each integration step, a subsystem only needs the predictive equivalence and correctional equivalence once. Additionally, asynchronous parallel technology based on the MPI on the PC-Cluster platform is designed to speed up the convergence. Several cases demonstrate that the proposed method has fast calculation speed and efficiency, as well as the simulation precision accepted for engineering application. For some large scale real system, the real-time or even super-real-time simulation will be realized.