Author, as appears in the article.: Ramos, Ezequiel Rodriguez; Leyva, Ramon; G. Farivar, Glen; Tafti, Hossein Dehghani; Townsend, Christopher D.; Pou, Josep;

Department: Enginyeria Electrònica, Elèctrica i Automàtica

URV's Author/s: Leyva Grasa, Ramon

Keywords: Static compensator (statcom) Statcom Predictive control Power converters Multilevel converter Multi-input global tracking Incremental passivity Grid synchronization Cascaded h-bridge (chb) Capacitors Boost converter Bilinear system control

Abstract: A low-capacitance static compensator (LC-StatCom) based on a cascaded H-bridge (CHB) multilevel converter can be an efficient and low-cost solution for reactive power compensation in power grids. However, the reduced capacitance, and, therefore, faster capacitor voltage dynamics, makes it challenging to control it. Classical cascade control schemes, in which the bandwidths associated with the inner current loop and the outer capacitor voltage loop need to be separated enough, are the most reported approaches. Nevertheless, for the LC-StatCom case, the voltage loop can be almost as fast as that one of the current loop. For this reason, this article proposes a control approach that does not separate voltage and current dynamics. Concretely, we propose a multi-input linear time-variant control law, based on incremental passivity theory for CHB multilevel converters. The proposed control guarantees stability despite saturation in the control signal. In addition, it provides capacitor voltage balance without the need to use a specific balancing stage. This article, first, reviews the average model of the converter and, then, analyses the steady-state dynamic behavior to determine the desired and coherent reference signals. Then, it applies an incremental passivity control approach to drive the LC-StatCom state variables to the desired references. After introducing the proposed control law, experimental results on a seven-level 1-kVA CHB LC-StatCom are shown to demonstrate its excellent performance in steady state and transients.

Thematic Areas: Interdisciplinar Engineering, electrical & electronic Engenharias iv Engenharias iii Electrical and electronic engineering Ciências agrárias i Ciência da computação

licence for use: https://creativecommons.org/licenses/by/3.0/es/

ISSN: 0885-8993

Author's mail: ramon.leyva@urv.cat

Author identifier: 0000-0001-6431-3688

Last page: 8778

Record's date: 2023-02-19

Journal volume: 35

Papper version: info:eu-repo/semantics/acceptedVersion

Link to the original source: https://ieeexplore.ieee.org/document/8954665

Licence document URL: http://repositori.urv.cat/ca/proteccio-de-dades/

Papper original source: Ieee Transactions On Power Electronics. 35 (8): 8766-8778

APA: Ramos, Ezequiel Rodriguez; Leyva, Ramon; G. Farivar, Glen; Tafti, Hossein Dehghani; Townsend, Christopher D.; Pou, Josep; (2020). Incremental Passivity Control in Multilevel Cascaded H-Bridge Converters. Ieee Transactions On Power Electronics, 35(8), 8766-8778. DOI: 10.1109/TPEL.2020.2965164

Article's DOI: 10.1109/TPEL.2020.2965164

Entity: Universitat Rovira i Virgili

Journal publication year: 2020

First page: 8776

Publication Type: Journal Publications