Impact of Control Loops on the Passivity Properties of Grid-Forming Converters with Fault-Ride through Capability
Journal article, 2021

Due to the increasing integration of renewable energy sources (RES) and a corresponding reduction of conventional generating units, there is nowadays a demand from the power-electronic converters to provide grid-forming properties through proper control of the converter systems. This paper aims to evaluate the impact of various control loops in a grid-forming control strategy equipped with a fault-ride through capability on the passivity properties of the converter system. Through the analysis of the frequency-dependent input admittance of the converter, the main factors affecting the passivity properties are identified. A simplified analytical model is derived in order to propose possible control modifications to enhance the system’s passivity at various frequencies of interest and the findings are validated through detailed time-domain simulations and experimental tests.

grid-forming converter

control interaction

input admittance


frequency analysis


stability analysis


Mebtu Bihonegn Beza

Chalmers, Electrical Engineering, Electric Power Engineering

Massimo Bongiorno

Chalmers, Electrical Engineering, Electric Power Engineering

Anant Narula

Chalmers, Electrical Engineering, Electric Power Engineering


1996-1073 (ISSN)

Vol. 14 19 6036

Driving Forces

Sustainable development

Areas of Advance


Subject Categories

Electrical Engineering, Electronic Engineering, Information Engineering

Control Engineering



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