Improved Sensor Reduction Method in Modular Multilevel Converters With Open-Loop Controller Based on Arms Energy Estimation

Multilevel converters (MLCs) are pioneers in the field of electrical energy conversion. From the classification of MLCs, modular multilevel converter (MMC) is top-rated due to its attractive structure and performance. The modular nature and no need for isolated DC resources are two significant advan...

Full description

Saved in:
Bibliographic Details
Published in:IEEE transactions on power delivery 2022-12, Vol.37 (6), p.5003-5013
Main Authors: Bagheri-Hashkavayi, Mohammad, Barakati, S. Masoud, Yousofi-Darmian, Saeed, Barahouei, Vahid
Format: Article
Language:English
Subjects:
Capacitors
Controllers
Electric potential
energy balance
Energy conversion
Estimation
Mathematical models
Modular multilevel converter (MMC)
Modular structures
Multilevel
Multilevel converters
phase-shifted sinusoidal PWM (PSPWM)
sensor reduction
Sensors
sorting method
Voltage
Voltage control
Voltage measurement
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:Multilevel converters (MLCs) are pioneers in the field of electrical energy conversion. From the classification of MLCs, modular multilevel converter (MMC) is top-rated due to its attractive structure and performance. The modular nature and no need for isolated DC resources are two significant advantages of this converter. However, the need for many sensors to control its performance is a considerable drawback. In addition, the internal circulating current in the MMC causes losses, decreases efficiency, and increases the voltage ripple of capacitors. This paper proposes combining a new capacitor voltage sorting method and an open-loop controller based on arms energy estimation to control the MMC using two voltage sensors in the arms and one current sensor at the output. The proposed method ensures continuous voltage balancing of the capacitors and removes multiple voltage sensors from sub-modules (SMs). The simulation and experimental results verify the accuracy and effectiveness of the proposed method.
ISSN:0885-8977
1937-4208
DOI:10.1109/TPWRD.2022.3165474