Decentralized adaptive virtual impedance control for robust power sharing and circulating current suppression in parallel inverters for three-phase islanded microgrid applications

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27240%2F25%3A10259181" target="_blank" >RIV/61989100:27240/25:10259181 - isvavai.cz</a>

Alternative codes found

RIV/61989100:27730/25:10259181

Result on the web

<a href="https://www.sciencedirect.com/science/article/pii/S2352484725007486" target="_blank" >https://www.sciencedirect.com/science/article/pii/S2352484725007486</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.egyr.2025.12.009" target="_blank" >10.1016/j.egyr.2025.12.009</a>

Result language

angličtina

Original language name

Decentralized adaptive virtual impedance control for robust power sharing and circulating current suppression in parallel inverters for three-phase islanded microgrid applications

Original language description

Islanded microgrids (IMGs) with complex line impedances face persistent challenges in achieving accurate reactive power sharing and suppressing circulating currents due to mismatched line impedances, load variations, and the intrinsic coupling between active and reactive power control. These issues can degrade voltage quality and stability, increase power losses, and threaten system stability, particularly in multi- distributed generation (DG) units-based microgrids. This paper proposes a novel, fully decentralized adaptive complex virtual impedance (ACVI) mechanism within the conventional droop control framework formulated in the synchronous dq reference frame. Unlike existing fixed or partially adaptive virtual impedance approaches, the proposed approach simultaneously and adaptively adjusts both virtual resistance and virtual inductance of each DG unit based solely on locally measured reactive power and voltage amplitude, eliminating any need for communication links or explicit line impedance estimation. A power decoupling mechanism is incorporated into the control scheme to mitigate active-reactive coupling and improve transient response. Furthermore, the control architecture combines outer voltage and inner current regulation loops equipped with decoupling elements and line current feedforward compensation to reinforce transient performance and disturbance rejection capabilities. The adaptive impedance adjustment also introduces additional system damping, ensuring robust control performance under steady-state operation, abrupt load changes, and DG disconnection scenarios. Comprehensive small-signal stability analysis is conducted to guide parameter tuning and confirm robust dynamic performance. The effectiveness of the proposed controller is validated through extensive Hardware-in-the-Loop real-time simulations using an OPAL-RT OP5700 real-time simulator. Results demonstrate that the proposed ACVI method achieves highly accurate active and reactive power sharing with very lower reactive power sharing error, significantly suppresses circulating currents, faster transient response, and maintains IMG voltage within 5 % drop of its nominal value under abrupt load changes and DG disconnections. Owing to its communication-free design, scalability, and ease of implementation, the proposed ACVI-based control scheme is well suitable for low-, medium-, and high-voltage islanded microgrids with complex impedance characteristics integrating diverse inverter-interfaced renewable energy sources.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

20700 - Environmental engineering

Project

<a href="/en/project/TN02000025" target="_blank" >TN02000025: National Centre for Energy II</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2025

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Energy Reports

ISSN

2352-4847

e-ISSN

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Volume of the periodical

14

Issue of the periodical within the volume

1-17

Country of publishing house

NL - THE KINGDOM OF THE NETHERLANDS

Number of pages

17

Pages from-to

5639-5655

UT code for WoS article

001638188700004

EID of the result in the Scopus database

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