Sequence Control Strategy for Grid-Forming Voltage Source Converters Based on the Virtual-Flux Orientation under Balanced and Unbalanced Faults
Juan Dolado Fernández,
Joaquín Eloy-Garcia,
Santiago Arnaltes (arnalte@ing.uc3m.es) and
Jose Luis Rodríguez-Amenedo
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Juan Dolado Fernández: Electrical Engineering Department, Superior Polytechnique School, Faculty of Engineering, Carlos III University of Madrid, 28911 Leganés, Madrid, Spain
Joaquín Eloy-Garcia: Ingenia Power Solutions SL, Av. Transición Española 32, 28918 Alcobendas, Madrid, Spain
Santiago Arnaltes: Electrical Engineering Department, Superior Polytechnique School, Faculty of Engineering, Carlos III University of Madrid, 28911 Leganés, Madrid, Spain
Jose Luis Rodríguez-Amenedo: Electrical Engineering Department, Superior Polytechnique School, Faculty of Engineering, Carlos III University of Madrid, 28911 Leganés, Madrid, Spain
Energies, 2023, vol. 16, issue 7, 1-24
Abstract:
Renewable power generation has increased in recent years, which has led to a decrease in the use of synchronous generators (SGs). These power plants are mainly connected to the power system through electronic converters. One of the main differences between electronic converters connected to power systems and SGs connected to the grid is the current contribution during faults, which can have an impact on protection systems. New grid codes set requirements for fast current injection, but the converters’ maximum current limitation during faults make it challenging to develop control strategies for such current contribution. This paper presents a positive and negative sequence current injection strategy according to the new Spanish grid code requirements for the novel grid-forming converter control algorithm based on virtual-flux orientation. The behavior of the proposed strategy is tested in a hardware in the loop (HiL) experimental set-up under balanced faults, meaning that the fault is symmetrically distributed among the three phases, and unbalanced faults, where the fault current is distributed asymmetrically between the phases.
Keywords: grid-forming power converter; virtual-flux orientation; unbalanced faults; negative sequence; hardware in the loop; renewable energy sources; Spanish grid code (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: 2023
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Persistent link: https://EconPapers.repec.org/RePEc:gam:jeners:v:16:y:2023:i:7:p:3056-:d:1108946
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