Deadbeat Predictive Current Control for Modular Multilevel Converters With Enhanced Steady-State Performance and Stability

Model predictive control (MPC) methods are popularly employed in modular multilevel converters (MMCs) due to their fast dynamic response and multiobjective control capability. However, they present some inherent problems, such as computational complexity, variable switching frequency, poor steady-st...

Full description

Saved in:
Bibliographic Details
Published in:IEEE transactions on power electronics 2020-07, Vol.35 (7), p.6878-6894
Main Authors: Wang, Jinyu, Tang, Yi, Lin, Pengfeng, Liu, Xiong, Pou, Josep
Format: Article
Language:English
Subjects:
Algorithms
Alternating current
Capacitors
Control algorithms
Control methods
Control stability
Control theory
Converters
Cost function
Current control
Deadbeat control
Dynamic response
Electric potential
Equivalent circuits
high-voltage direct current transmission
Metal matrix composites
model predictive control (MPC)
modular multilevel converter (MMC)
Multiple objective analysis
Predictive control
Queuing theory
Steady state
steady-state performance
Switches
Switching
Systems stability
Voltage
Voltage control
Weighting
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:Model predictive control (MPC) methods are popularly employed in modular multilevel converters (MMCs) due to their fast dynamic response and multiobjective control capability. However, they present some inherent problems, such as computational complexity, variable switching frequency, poor steady-state performance, and tedious weighting factor selection. This article develops a deadbeat predictive current control method for MMCs. This method can realize the reference tracking of ac current and circulating current in one sampling period without error, and thus provide a fast dynamic response as conventional MPC methods. Besides, switching state or voltage level evaluation, cost function calculation as well as weighting factor selection are not required. Therefore, it has a very low calculation burden, which is independent of the number of submodules (SMs). Since a modulation stage is utilized, a fixed switching frequency and consequently a satisfactory steady-state performance are obtained. The effects of time delay, parameter mismatch, and SM capacitor voltage ripple on the control algorithm are discussed. Also, the corresponding improvement measures are provided to further enhance the steady-state performance and system stability of MMCs. The effectiveness and performance of the developed control algorithm are verified by experimental results.
ISSN:0885-8993
1941-0107
DOI:10.1109/TPEL.2019.2955485