MODELING AND SIMULATION OF HVDC WITH DYNAMIC PHASORS

A newly developed method-dynamic phasors method is presented in this paper and applied to model HVDC converters This approach is based on the time-varying Fourier coefficient series of the system variables, and focused on the dynamics of the Fourier coefficients. By truncating unimportant higher order series and keeping only those significant series, the dynamic phasors model can catch the dynamic behavior of the original detail model of a certain element. In this paper, the analysis is based on a piecewise state representation of the converter through the switching functions, which can consider the commutation periods. Through typical test examples and their simulation results, the effectiveness and accuracy of this method are verified.