Dynamic Average Modeling of Front-End Diode Rectifier Loads Considering Discontinuous Conduction Mode and Unbalanced Operation

Dynamic Average Modelling of Rectifier Loads and AC‐DC Converters for Power System Applications

“…With the series choke inductors in both configurations, the DC bus current becomes continuous, which results in CCM operation [17]. Alternatively, omitting the DC filter capacitor from the system would also prevent DCM operation and force the current drawn at the bridge terminals to remain continuous within the switching interval, as observed in Figure 10.4 (bottom plot).…”

“…In many cases, such as battery charging [42,43] and variable speed drive applications [8,9], the DC filter inductor may be omitted, [17].…”

“…However, for the PWM converters the functions (10. [16][17][18][19] can be established by applying the energy conservation principle to the converter cell. In particular, looking at the AC side, the three-phase power can be written as…”

“….1 Typical configuration of a front-end rectifier load system (© 2012 IEEE) [17]. inherent switching, detailed switching models are discontinuous and cannot be efficiently linearized and used for small-signal analysis.…”

“…The resulting AVMs are therefore computationally efficient and could run orders of magnitudes faster than the original switching models. The AVMs can therefore be effectively utilized to remove the highfrequency switching from the model while preserving the lower-frequency dynamics of the system [17]. Such AVMs can particularly be used for simulations of system transients where the switching harmonics (i.e.…”