Optimization of Dynamic Phasor Modeling for LCC-HVDC Systems Based on Fourier Transform

This paper conducts a research on the modeling of LCC-HVDC system based on dynamic phasors. The current and voltage switching function characterize the features of the converter bridge and serve as a crucial link between DC and AC electrical quantities. However, existing literature lacks a systematic and modular method for constructing a dynamic phasor model of the switching function. This paper presents closed form harmonic expression for voltage and current switching functions. Based on the properties of Fourier transform, this paper proposes a systematic and modular method for deriving a switching function dynamic phasor model, which has the advantages of modularity and convenience, and can facilitate its promotion and application. This method is also applicable to variants of switching…