Parametric Stability Assessment of Single-Phase Grid-Tied VSCs Using Peak and Average DC Voltage Control

A type of peak-value dc voltage control (denoted as PK control) was proposed in the literature for supporting use a smaller dc-side capacitance when single-phase source converter is operated static synchronous compensator. Although it demonstrated to operate stably under several conditions, will be revealed this article how suffer from more severe small-signal stability issue nonideal grid conditions than conventional method controlling average value Avr control). Especially, shown sensitive some parameters. To obtain these results, parameter-oriented analysis developed linear time-periodic framework. Then, utilized parametric assessments and control. Finally, both frequency- time-domain experimental results verified effectiveness accuracy applied presented analysis.