Fixed-Frequency Operation of an Island Grid with Multiple Grid-Forming Inverters and GPS-Based Synchronisation

verfasst von

R. Strunk, L. Reus, L. Hofmann, A. Mertens

Abstract

By using an external signal for the synchronisation, an island grid with grid-forming inverters (GFMs) can be operated at a constant frequency. The global positioning system (GPS) provides a periodic pulse with a suitable accuracy. This is used to define the grid frequency and a reference for the voltage phase angle. A digital counter in the control hardware determines the phase angle. The counter is reset by each pulse of the GPS. An active power-angle droop control leads to partial power sharing between the GFMs and reduces distortions caused by non-ideal synchronisation. Furthermore, the grid operator can adjust the voltage reference phasors of the GFMs to control the power flow in the grid. An island grid with two GFMs and a hydro power plant is studied in simulations. The investigated power system is an altered and simplified grid model of Suðuroy, in the Faroe Islands. The effects of a load connection and a distorted GPS synchronisation are studied. Stable operation of the power system using the fixed-frequency approach is demonstrated.

Organisationseinheit(en)

Fachgebiet Leistungselektronik und Antriebsregelung
Fachgebiet Elektrische Energieversorgung

Typ

Aufsatz in Konferenzband

Seiten

30-36

Anzahl der Seiten

7

Publikationsdatum

2023

Publikationsstatus

Veröffentlicht

ASJC Scopus Sachgebiete

Ingenieurwesen (insg.)

Ziele für nachhaltige Entwicklung

SDG 7 – Erschwingliche und saubere Energie

Elektronische Version(en)

https://doi.org/10.1049/icp.2023.1430 (Zugang: Geschlossen)