Influence of Some Factors in Practical System on the Dynamic Parameter Model of Harmonic Source and the Corresponding Solutions

Compared with other harmonic source models, the dynamic parameter model (DPM) has the advantage of accuracy and good application prospects. Previous studies on the DPM have been carried out under ideal conditions. In order to improve the practicability of the DPM, for the first time, this paper studied the influence of some factors in practical system on the DPM, the corresponding solutions and suggestions were put forward. Firstly, the DPM was briefly introduced and the concept of nonlinear characteristic curve of harmonic source was put forward. Secondly, in order to deal with the time-varying of harmonic source in practical system, a method of dividing each working state and modeling separately was developed. Thirdly, the influence of the sampling quantity, range and error on the accuracy and parameters of the DPM were analyzed, the guidance on sampling for different kinds of harmonic sources were obtained. Finally, the practical research direction of the DPM in the future were discussed.