A controller for practical stability of capacitor voltages in a five-level diode-clamped converter

Umbría, Francisco; Gordillo, Francisco; Salas, Francisco

doi:10.1016/j.ejcon.2015.10.004

Cited by 11 publications

(7 citation statements)

References 43 publications

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“…El modelo dinámico del convertidor de cinco niveles fue presentado en [5]. De esta forma, la dinámica de las corrientes de fase, expresadas en coordenadas αβγ, y las diferencias de tensiones en los condensadores se pueden expresar como,…”

Section: Modelounclassified

“…Así como los convertidores de tres niveles son bastante utilizados en diversas aplicaciones industriales, los convertidores de mayor número de niveles están más destinados a tareas de investigación debido a su mayor coste y a la complejidad que presenta el desarrollo de leyes de control. Concretamente, presenta especial dificultad mantener el balance de tensiones en los condensadores del bus de continua cuando se aplican técnicas convencionales de modulación [5].…”

Section: Introducci óNunclassified

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Diseño, construcción y control de un convertidor de potencia de cinco niveles

Ventosa‐Cutillas¹,

Gómez-Correa²,

Gordillo³

et al. 2022

Actas De Las XXXVII Jornadas De Automática 7, 8 Y 9 De Septiembre De 2016, Madrid

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En el trabajo que aquí se presenta se va a exponer el diseño, construcción y control de un convertidor de cinco niveles de diodos fijos funcionando en modo rectificador. Dada la complejidad a la hora de conseguir buenos resultados de control, este tipo de convertidores se encuentran principalmente destinados a la investigación, razón por la cual supone un reto desde el punto de vista del control de la tensión en el bus de continua y del balance o equilibrio de los condensadores.

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Section: Modelounclassified

Section: Introducci óNunclassified

Diseño, construcción y control de un convertidor de potencia de cinco niveles

Ventosa‐Cutillas¹,

Gómez-Correa²,

Gordillo³

et al. 2022

Actas De Las XXXVII Jornadas De Automática 7, 8 Y 9 De Septiembre De 2016, Madrid

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“…Practical asymptotic stability [31] Definition 1: [33] A system is said to be practically stable if there exists positive constants b and c, independent of t 0 > 0, and for every a ∈ (0, c ), there is…”

Section: Practical Stabilitymentioning

confidence: 99%

“…Definition 1 : [33] A system is said to be practically stable if there exists positive constants b and c , independent of

t_{0} > 0

, and for every

a \in (0, c)

, there is

T_{a b} = T_{a b} false(a, b false) \geq 0

, independent of t 0 , such that

‖x (t_{0})‖ \leq a \Rightarrow ‖x (t)‖ \leq b, \forall t \geq t_{0} + T_{a b} .

…”

Section: Preliminaries and Problem Statementmentioning

confidence: 99%

A practical stable control scheme under end point equivalence modulation for DC power supply converters

Lin

et al. 2021

IET Power Electronics

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A series of DC power supply converters can be described as linear affine systems with finite inputs and constrained switching frequency. In this study, a practical‐stability‐oriented general control framework with duty‐cycle‐like characteristics is deduced for such converters. First, a concept called End Point Equivalence Modulation (EPEM) is introduced to release constraints. Following this, a Control Lyapunov Function (CLF) is employed to design the switching law and the relationship between the boundary of the convergence zone and the switching frequency is derived. In addition, an optimized switching strategy is presented to halve the switching frequency without degrading the control performance, which is also helpful for reducing switching loss. Finally, a single‐phase inverter and buck converter are considered as case studies and analysis show that Sinusoidal Pulse Width Modulation (SPWM) and volt‐second balance guarantee their practical stability, respectively, which can be theoretically derived and proved under EPEM. All the proposed methods and controllers are validated both by simulations on MATLAB/Simulink and experiments in a rapid control prototype platform based on a FPGA module.

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“…Transforming the dynamics (5) from the abc frame to the orthogonal αβγ frame using the power-invariant Clarke transformation [18] and assuming a balanced three-phase system, the term v o3n is suppressed.…”

Section: Circuit Description and Modelmentioning

confidence: 99%