A library of second-order models for synchronous machines
For power system engineers, it provides more accurate yet simple models for dynamic analysis and control design, but the approach is incremental.
This paper develops a library of second-order synchronous machine models that extend beyond first-swing stability analysis to transient stability studies, validated by matching voltage, frequency, and phase profiles of a high-order model.
This paper presents a library of second-order models for synchronous machines that can be utilized in power system dynamic performance analysis and control design tasks. The models have a similar structure to the classical model in that they consist of two dynamic states, the power angle and the angular speed. However, unlike the classical model, the models find applications beyond first swing stability analysis; for example, they can also be utilized in transient stability studies. The models are developed through a systematic reduction of a nineteenth-order model, using singular perturbation techniques, and they are validated by comparing their voltage, frequency, and phase profiles with that of the high-order model and that of the classical model.