Medium Mass Nuclei Using Pionless Effective Field Theory in Harmonic Oscillator Basis

First, an analytical method was proposed for aggregating a multi-machine system frequency response (SFR) model. The SFR model can accurately represent the bus frequency response of small-scale systems and the center-of-inertia frequency of large systems. The method is a fast tool for simulating the system frequency response after a disturbance. Therefore, it has wide applications in power system dynamic studies and acts as a solid theoretical foundation for DDC studies.