Work

Grid-Forming Control Using a Disturbance Observer for Unbalanced Conditions

Year: 2025

Type: conference-paper

Abstract: A grid-forming control method, capable of operating under unbalanced grid conditions, is proposed. The proposed method maintains constant converter voltage magnitude in unbalanced grid conditions. The converter current is measured, while the positive- and negative-sequence grid voltages are estimated with a disturbance observer. A current limitation scheme is proposed, allowing the converter to maintain voltagesource characteristics while respecting the current limits of the converter. Experimental results with a 12.5-kVA converter are used to verify the viability of the proposed method. The results show that the proposed method is able to operate during severe balanced and unbalanced faults.

Source: Energy Conversion Congress and Expo Europe (ECCE Europe)

DOI: 10.1109/ecce-europe62795.2025.11238865

Authors: Tuure Nurminen, Rayane Mourouvin, Marko Hinkkanen, Jarno Kukkola

Institutions: Aalto University, ABB (Finland)

Language: English

Topic: Microgrid Control and Optimization

Subfield: Control and Systems Engineering

Field: Engineering

Domain: Physical Sciences

SDGs: Affordable and clean energy, Industry, innovation and infrastructure

Open Access status: green

Funders: Walter Ahlströmin Säätiö, Jenny ja Antti Wihurin Rahasto