Input-parallel–output-series control strategy for three-level medium-voltage DC grid-type converter

Autor: Faisal Mehmood Shah, Wenqiang Xie, Wen Li Yan, Rui Li, Han Minxiao, Girmaw Teshager Bitew
Jazyk: angličtina
Rok vydání: 2019
Předmět:
power convertors
closed loop systems
variable structure systems
PI control
electric current control
power grids
control system synthesis
DC-DC power convertors
feedback
voltage control
variable voltage
three-level neutral-point-clamped converter
comprehensive control feedback system
DC voltages
constant magnitude
constant frequency
constant output voltages
closed-loop control topology
inner current loop control
outer voltage loop control
proportional–integral control method
grid-connected converter
input-parallel–output-series control strategy
three-level medium-voltage DC grid-type converter
control topology input-parallel–output-series converter system
high-output power applications
ICS
input current sharing
output current sharing
sliding mode control
Engineering (General). Civil engineering (General)
TA1-2040
Zdroj: The Journal of Engineering (2019)
Druh dokumentu: article
ISSN: 2051-3305
DOI: 10.1049/joe.2018.8492
Popis: A control topology input-parallel–output-series converter system is investigated, which is suitable for high-voltage and high-output power applications. In this control method input current sharing (ICS) and output current sharing (OVS) taken into account. As observed, ICS is automatically attained as OVS sharing is controlled. In this design, two modules are connected in series, Module 1 provided variable voltage but in Module 2 by using three-level neutral-point-clamped converter and designing a comprehensive control feedback system, which regulates the DC voltages at the constant magnitude and constant frequency, helps to provide constant output voltages in the event of uncertain disturbance and load variation, A feedback double closed-loop control topology (inner current loop control and outer voltage loop control) with the combination of sliding mode control and a proportional–integral control method. A simulation model is built, by using MATLAB/Simulink, and the simulation results show excellent performance and feasibility of this system. This will be beneficial for research and improvement for the grid-connected converter.
Databáze: Directory of Open Access Journals
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