A Basin Stability Based Metric for Ranking the Transient Stability of Generators

This paper discusses a simulation-based generator-level stability index and demonstrates the use of the index to quantify the impact of different load scenarios, transmission line reactances, and generator parameters on transient stability. A basin stability concept that is based on recent works in the physics community on complex systems and power systems is used, which estimates the regions of attraction through time-domain simulation. The quantitative results generated by basin stability can provide a general ranking metric to reflect which generator or group of generators is likely to become unstable after disturbances. A detailed subtransient model with sixth-order subtransient generators, second-order exciters, and third-order power system stabilizers has been used for discussion. Additionally, a multinode basin stability study on a 16-machine 68-bus system with the swing-equation model is also included to demonstrate the replicability. The state-of-the-art parallel computing techniques can significantly reduce the simulation time of the proposed method.