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

Mebtu Beza, Massimo Bongiorno and Anant Narula
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Mebtu Beza: Department of Electric Power Engineering, Chalmers University of Technology, Hörsalsvägen 11, 412 96 Gothenburg, Sweden
Massimo Bongiorno: Department of Electric Power Engineering, Chalmers University of Technology, Hörsalsvägen 11, 412 96 Gothenburg, Sweden
Anant Narula: Department of Electric Power Engineering, Chalmers University of Technology, Hörsalsvägen 11, 412 96 Gothenburg, Sweden

Energies, 2021, vol. 14, issue 19, 1-14

Abstract: 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.

Keywords: control interaction; frequency analysis; grid-forming converter; input admittance; modeling; passivity; stability analysis (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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