Stability Assessment of A Radial Grid With Power Converters

Xingqi Liu, Zhixiang Zou, Jiajun Yang, Jian Tang, Zhiren Liu, Giampaolo Buticchi, Zheng Wang, Ming Cheng

Research output: Journal PublicationArticlepeer-review

2 Citations (Scopus)

Abstract

The increase proportion of power converters causes stability problems in the radial grid. To address these issues, this paper firstly proposes a unified modeling procedure and applies it to two types of converters. Secondly, the impedance models are used to analyze the stability of a radial grid with converters under four cases. The influence of the short circuit ratio (SCR) and line impedance on system stability are investigated. Then, a comprehensive sensitivity analysis is performed in order to investigate the effects of parameters variations on the closed-loop poles of the system under different conditions. Finally, the accuracy of the model and theoretical analysis are verified by simulations and Hardware-in-the-Loop (HiL) tests.

Original languageEnglish
Pages (from-to)61-74
Number of pages14
JournalIEEE Open Journal of Power Electronics
Volume3
DOIs
Publication statusPublished - 2022

Keywords

  • Complex frequency domain
  • Grid-following converter
  • Grid-forming converter
  • Impedance model
  • Radial grid
  • Sensitivity analysis
  • Stability

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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