AUTHOR=Yan Zuanhong , Hong Chao 

TITLE=Analysis of Multi-Frequency Oscillation Stability in a Prosumer Power Network

JOURNAL=Frontiers in Energy Research

VOLUME=Volume 9 - 2021

YEAR=2022

URL=https://www.frontiersin.org/journals/energy-research/articles/10.3389/fenrg.2021.829988

DOI=10.3389/fenrg.2021.829988

ISSN=2296-598X

ABSTRACT=Multi-frequency oscillation is a new type of electromagnetic oscillation issue in power system raised by the increasing penetration of renewable power and power electronic devices. This paper investigates the risks and influencing factors of multi-frequency oscillation in a prosumer power network where a variety of converter-based resources exists. For the feasibility of analysis, the internal and external stability of the study system are defined and analyzed based on sequence impedance models. Analysis results show the impacts of control parameters of prosumers, length of cable, transformer ratios, local grid strength, power and capacity of prosumers on the risks of oscillation. Accordingly, despite of the poorly tuned control parameters, the study system has higher risks of multi-frequency oscillation with longer cable, lower rated voltage of cable, larger capacity and inductive power consumption of the neighbouring prosumers. Frequency-domain analysis results are demonstrated by EMTDC/PSCAD simulations.