Research on Harmonic Generation Mechanism of PSM High-Voltage Power Supply in Dynamic Operation

To study the harmonic generation mechanism of high-voltage power supply (HVPS) in dynamic operation, the mathematical model of the PSM HVPS is built. The mathematical model of the equivalent circuit is established by analyzing the basic operational unit of the HVPS. The initial parameters of the mathematical model are updated according to the number of the modules in series on the load side, and the key electrical parameters set in the mathematical model are obtained. After that, according to the number and the position of the series modules in the HVPS, the current superposition and phase shift calculation are carried out to obtain the harmonic current content in the power grid. This article also verified the accuracy of the mathematical model and calculating method by building a module simulation and HVPS simulation model. Furthermore, the harmonic generation characteristics in the dynamic operation of the HVPS are studied in this article.