A Feedforward Control-Based Power Decoupling Strategy for Grid-Forming Grid-Connected Inverters

Grid-forming inverters, which are represented by droop control and virtual synchronous generator control, have been widely studied and applied because of their excellent grid-supporting ability and smooth off-grid switching. When a grid-forming inverter is connected to a microgrid or utility grid, t...

Full description

Saved in:
Bibliographic Details
Published in:Energies (Basel) 2024-01, Vol.17 (2), p.424
Main Authors: Liu, Baojin, Song, Zhaofeng, Yu, Bing, Yang, Gongde, Liu, Jinjun
Format: Article
Language:English
Subjects:
Alternative energy
Analysis
Control systems
Coordinate transformations
Electric inverters
Electricity distribution
feedforward control
grid-forming inverter
power decoupling
Renewable resources
Simulation methods
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Grid-forming inverters, which are represented by droop control and virtual synchronous generator control, have been widely studied and applied because of their excellent grid-supporting ability and smooth off-grid switching. When a grid-forming inverter is connected to a microgrid or utility grid, the control loops of active power and reactive power will be coupled because of the voltage phase difference, which will affect the power control performance. This paper first derives the small-signal linearized model of the system, based on which a frequency feedforward control and an amplitude feedforward control are proposed to decouple the active power and reactive power control loops, respectively. The proposed decoupling strategy directly modifies the reference values through feedforward with an easily implementable principle that is applicable to various control coordinate systems, control coordinate systems, and control structures. By comparing system models with and without the proposed decoupling strategy, its effectiveness can be theoretically proven. Time-domain simulations and hardware experiments are presented to further validate its effectiveness.
ISSN:1996-1073
1996-1073
DOI:10.3390/en17020424