Robust Vector Current Control of Grid-Interactive Smart Packed E-Cell Multi-Level Inverters Under Non-Ideal Grid Conditions

TY - JOUR

T1 - Robust Vector Current Control of Grid-Interactive Smart Packed E-Cell Multi-Level Inverters Under Non-Ideal Grid Conditions

AU - Sadabadi, Mahdieh S.

AU - Sharifzadeh, Mohammad

AU - Laurendeau, Eric

AU - Gheisarnejad, Meysam

AU - Khooban, Mohammad Hassan

AU - Portillo, Ramon

AU - Franquelo, Leopoldo Garcia

AU - Al-Haddad, Kamal

N1 - Publisher Copyright: © 1986-2012 IEEE.

PY - 2025

Y1 - 2025

N2 - This paper proposes a convex optimization-based strategy for the design of vector current controllers in a gridinteractive single-phase nine-level Packed E-Cell (PEC9) inverter under uncertain grid conditions, from stiff to weaker conditions, and non-ideal grid voltage conditions. The non-ideal gridinteractive PEC inverter with the grid impedance uncertainty is modeled by a multivariable polytopic model subject to a disturance in a state space framework. By virtue of this novel modeling approach, a robust two-degree-of-freedom ℋ∞ multivariable Proportional-Integral (PI) vector current control strategy is then proposed. The proposed control mechanism guarantees robust stability, employing a quadratic Lyapunov function, and robust performance against the uncertainty in grid impedance and nonideal grid voltage conditions, also it provides inverter currents with Total Harmonic Distortion and harmonic components complying with IEEE Standard 1547 requirements. The effectiveness of the proposed grid-interactive smart PEC9 inverter equipped with the proposed robust vector control strategy is evaluated by simulation and hardware-in-the-loop experimental case studies.

AB - This paper proposes a convex optimization-based strategy for the design of vector current controllers in a gridinteractive single-phase nine-level Packed E-Cell (PEC9) inverter under uncertain grid conditions, from stiff to weaker conditions, and non-ideal grid voltage conditions. The non-ideal gridinteractive PEC inverter with the grid impedance uncertainty is modeled by a multivariable polytopic model subject to a disturance in a state space framework. By virtue of this novel modeling approach, a robust two-degree-of-freedom ℋ∞ multivariable Proportional-Integral (PI) vector current control strategy is then proposed. The proposed control mechanism guarantees robust stability, employing a quadratic Lyapunov function, and robust performance against the uncertainty in grid impedance and nonideal grid voltage conditions, also it provides inverter currents with Total Harmonic Distortion and harmonic components complying with IEEE Standard 1547 requirements. The effectiveness of the proposed grid-interactive smart PEC9 inverter equipped with the proposed robust vector control strategy is evaluated by simulation and hardware-in-the-loop experimental case studies.

KW - Convex optimization

KW - grid-interactive inverters

KW - packed E-Cell (PEC9) inverter

KW - polytopic model uncertainty

KW - vector current control

UR - https://www.scopus.com/pages/publications/85205732190

U2 - 10.1109/TEC.2024.3471191

DO - 10.1109/TEC.2024.3471191

M3 - Journal article

AN - SCOPUS:85205732190

SN - 0885-8969

VL - 40

SP - 1009

EP - 1021

JO - IEEE Transactions on Energy Conversion

JF - IEEE Transactions on Energy Conversion

IS - 2

ER -