An Efficient Robust Power-Voltage Control for Three-Level NPC Converters in Microgrids

Lei Liu, Zhenbin Zhang, Yunfei Yin, Sergio Vazquez, Yuxin Zhao, Ralph Kennel

Publikation: Beitrag in FachzeitschriftArtikelBegutachtung

1 Zitat (Scopus)

Abstract

High penetration of power converters may lead to power ripple, voltage swings, and weak antidisturbances for microgrids. Confronting these issues, this work proposes a robust control scheme, discrete-time super-twisting observer (DSTO)-embedded quasi-integral sliding-mode control (QISMC), for a three-level neutral-point-clamped power converter system, dramatically enhancing power/voltage regulation performance and antidisturbance capability. A fast convergence DSTO is deployed to offset multidisturbances caused by parameter mismatches, unknown loads, current path changes, switch mode noise, and self-compensating power/voltage tracking biases in QISMC. To further mitigate power/voltage steady-state error and boost system robustness, a new quasi-integral sliding-mode surface is built, inherently improving power/voltage tracking performance. Experimental data confirm that the proposed control outperforms the discrete-time extended-state-observer-based QISMC, DSTO-based quasi-sliding mode control, and discrete-time proportional-integral control in power/voltage, grid current harmonics, and robustness.

OriginalspracheEnglisch
Seiten (von - bis)5849-5863
Seitenumfang15
FachzeitschriftIEEE Transactions on Industrial Informatics
Jahrgang20
Ausgabenummer4
DOIs
PublikationsstatusVeröffentlicht - 1 Apr. 2024

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