Based on the Harmonic Linearization Railway Power Regulator Impedance Modeling

Considering the mutual coupling of harmonic in the railway static power conditioner and the impact of different control links on it, a method for establishing the small-signal impedance model of the AC side of the railway static power conditioner based on the principle of multi-harmonic linearization is proposed. Firstly, the steady-state average model of the railway static power conditioner is established, and the harmonic components of the internal steady-state electrical variables are computed. Secondly, utilizing the multi-harmonic linearization principle, we derive a small-signal impedance model for the AC side of the RPC based on its control system structure. Finally, a simulation model of the railway static power conditioner was established based on Matlab/Simulink, and the accuracy of the impedance model derived was verified using a sweep method.