Input Impedance Modeling of Multipulse Rectifiers by Harmonic Linearization

Functional Modeling of Symmetrical Multipulse Autotransformer Rectifier Units for Aerospace Applications

“…Under unbalanced conditions, a second harmonic will appear in these two components and V im is time dependant. Substituting (18) into (16) gives…”

“…However, all these models are only suitable for balanced conditions. Small-signal model is proposed in [15] and input impedance model is introduced in [16]. Though useful for assessing the stability margin of the power system, these two models are not applicable for general simulation study of the aircraft EPS.…”

Impedance Modeling Based Method for Sub/Supsynchronous Oscillation Analysis of D-PMSG Wind Farm

“…There are two methods to construct this impedance model: (1) transform the converter model into the dq reference frame, and use small-signal linearization; (2) use harmonic linearization method and directly model the three-phase positive-and negative-sequence impedance in the phase domain [15,16]. The first method could easily obtain the impedance model for the dq-domain control system.…”

A grid voltage perturbations based bidirectional impedance uniform control for grid‐connected DC/AC converter

“…IET Renewable Power Generation published by John Wiley & Sons Ltd on behalf of The Institution of Engineering and Technology. [4,5]. In order to simplify complex phase sequence transitions and algebraic operations, d-q impedance-based stability analysis has been widely used among researches [6].…”

“…Normally, the stability assessment between the individual converter and the power grid can be performed through the impedance‐based stability criterion, which includes harmonic linearization and small‐signal stability analysis in the d‐q frame [4, 5]. In order to simplify complex phase sequence transitions and algebraic operations, d‐q impedance‐based stability analysis has been widely used among researches [6].…”