The zero-order-hold (ZOH) model has been widely used to characterize the dynamic of single-updated or double-updated pulse width modulator (PWM). However, for the multi-updated PWM, the ZOH model does not consider the potential lost-of-comparison issue, which can lead to inaccurate modeling. In this paper, the comparator behavior of multi-updated PWM is analyzed. Based on the analytical results, an accurate PWM model is proposed. An L-filtered voltage source converter (VSC) with a multi-updated PWM-based digital controller is considered, whose current control loop is modeled by using both the proposed and the ZOH model for a comparative study. The results show that the proposed model can accurately predict the stability boundary.
|Konference||12th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2020|
|Periode||11/10/2020 → 15/10/2020|
|Sponsor||IEEE Industrial Application Society (IAS), IEEE Power Electronics Society (PELS)|
|Navn||ECCE 2020 - IEEE Energy Conversion Congress and Exposition|