Harmonic coupling characteristic analysis based on HSS and comparison of harmonic source identification methods

In order to meet the needs of energy conservation and environmental protection, the power system is gradually transforming to a new type of power system mainly based on new energy. And the following harmonic problems are becoming the focus of attention for experts and scholars in various countries. In this paper, a linear LCL filtering system and a nonlinear new energy grid-connected DC/DC converter are mathematically modeled using HSS theory, and the harmonic coupling characteristics of the models are analyzed with the harmonic transfer function matrix. Meanwhile, for the three data-driven algorithms used for harmonic source identification, this paper proposes a framework for harmonic source identification, and compares the various indicators of the three algorithms in the case of samples containing noise.