The Closed-Loop Control of the Half-Bridge-Based MMC Drive with Variable DC-Link Voltage-Reference-Cited by-同舟云学术

The Closed-Loop Control of the Half-Bridge-Based MMC Drive with Variable DC-Link Voltage

Published:2023-06-24 Issue:13 Volume:12 Page:2791
ISSN:2079-9292
Container-title:Electronics
language:en
Short-container-title:Electronics

Author:

Espinoza Mauricio¹,Diaz Matias²^ORCID,Espina Enrique²^ORCID,Mora Andrés³^ORCID,Letelier Arturo⁴,Donoso Felipe⁴,Cárdenas Roberto⁴^ORCID

Affiliation:

1. School of Electrical Engineering, Universidad de Costa Rica, San José 11501-2060, Costa Rica

2. Department of Electrical Engineering, Universidad de Santiago de Chile, Avenida Ecuador 3519, Santiago 9170124, Chile

3. Department of Electrical Engineering, Universidad Técnica Federico Santa María, Av. España 1680, Valparaiso 234000, Chile

4. Department of Electrical Engineering, Universidad de Chile, Santiago 8370451, Chile

Abstract

The modular multilevel converter (MMC) based on half-bridge modules is a power converter topology suitable for high-power medium-voltage variable-speed drives. However, the voltage of its flying capacitors is negatively affected when low frequencies appear at the AC port. This paper analyzes the influence of using a variable DC port voltage in a machine-side MMC by implementing a closed-loop approach, ensuring a constant voltage fluctuation in the capacitors of the MMC during the whole operating range. The effectiveness of the proposed control scheme is demonstrated through simulation studies and experimental validation tests conducted using a 7.5 kW experimental prototype composed of an induction machine fed by an MMC with 18 half-bridge cells.

Funder

Fondecyt Projects

Basal Project

University of Costa Rica’s group project

Publisher

MDPI AG

Subject

Electrical and Electronic Engineering,Computer Networks and Communications,Hardware and Architecture,Signal Processing,Control and Systems Engineering

Link

https://www.mdpi.com/2079-9292/12/13/2791/pdf

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