Achieving both Overcurrent Suppression and Transient Stability Improvement in Grid-Forming Inverter

Abstract

When operating a Grid-Forming inverter under voltage control, overcurrent is likely to occur in the event of a short circuit at the near end, so an overcurrent suppression function is required. However, this function causes a problem of reduced stability. Therefore, a control method to improve transient stability while suppressing overcurrent was investigated. The control principle was explained, and the validity of the proposed control method was confirmed by simulation.