Observer-based power-synchronization control for grid-forming converters

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openAccess

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Volume Title

A4 Artikkeli konferenssijulkaisussa

Date

2023-06-29

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Mcode

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Language

en

Pages

6
1-6

Series

2023 IEEE Belgrade PowerTech

Abstract

This paper proposes an observer-based power-synchronization control (OPSC) method for grid-forming converters. The method can also be utilized for the starting of synchronous generators. It is analogous to observer-based volts-per-hertz (V/Hz) control of electric machine drives, consisting of state-feedback control and an observer. A linearized model of the closed-loop system is derived, passivity of the mechanical subsystem is studied and tuning recommendations are given. The power tracking performance is assessed and compared to that of reference-feedforward power-synchronization control (RFPSC) with the help of simulations and laboratory experiments using a 12.5-kVA converter. The results show that the proposed control method provides good performance in both weak and strong grids.

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Keywords

Couplings, Uncertain systems, Analytical models, Electric machines, Observers, Synchronous generators, Closed loop systems

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Citation

Nurminen, T, Mourouvin, R, Hinkkanen, M, Kukkola, J, Routimo, M, Vilhunen, A & Harnefors, L 2023, Observer-based power-synchronization control for grid-forming converters . in 2023 IEEE Belgrade PowerTech ., 10202897, IEEE, pp. 1-6, IEEE PowerTech, Belgrade, Serbia, 25/06/2023 . https://doi.org/10.1109/PowerTech55446.2023.10202897