Impact of Digital Control Delay on Stability of Grid-Following Converters
In IEEE International Symposium on Power Electronics for Distributed Generation Systems (PEDG), 2022
Abstract
In a digital controlled system, the delay is inevitable. It will change the phase-frequency characteristics of the system, which will affect the stability. This paper analyzes the configuration of the grid-following converter and builds its small-signal model in detail. The impacts of delay on the stability of grid-following converters are analyzed through impedance-based model and single-input single-output (SISO) transfer function. In order to achieve a fair comparison, the two stability analysis methods are applied to the same system. Finally, a time-domain simulation model of 7 kW grid-following converter is built in Matlab/Simulink and an experimental prototype with same parameters is carried out to verify the effectiveness of the theoretical analysis.
Info
Conference Paper, 2022
In IEEE International Symposium on Power Electronics for Distributed Generation Systems (PEDG), 2022
UN SDG Classification
DK Main Research Area
Science/Technology
