Improved instantaneous average current-sharing control scheme for parallel-connected inverter considering line impedance impact in microgrid networks

Mohd Azrik Bin Roslan, Khaled Ahmed, Stephen Finney, Barry Williams

Research output: Contribution to journalArticle

82 Citations (Scopus)

Abstract

A new control scheme for parallel-connected inverters taking into account the effect of line impedance is presented. The system presented here consists of two single-phase inverters connected in parallel. The control technique is based on instantaneous average current-sharing control that requires interconnections among inverters for information sharing. A generalized model of a single-phase parallel-connected inverter system is derived. The model incorporates the detail of the control loops that use a proportional-resonant controller, but not the switching action. The voltage- and current-controller design and parameters selection process are discussed. Adaptive gain scheduling is introduced to the controller to improve the current and power sharing for a condition, where the line impedance is different among the inverters. The simulation results show that the adaptive gain-scheduling approaches introduced improve the performance of conventional controller in terms of current and power sharing between inverters under difference line impedance condition. The experiments validate the proposed system performance.
LanguageEnglish
Pages702-716
Number of pages15
JournalIEEE Transactions on Power Electronics
Volume26
Issue number3
Early online date30 Dec 2010
DOIs
Publication statusPublished - Mar 2011

Fingerprint

Controllers
Scheduling
Electric potential
Experiments

Keywords

  • distribution generation (DG)
  • microgrid
  • inverter
  • gain scheduling
  • distributed generation systems
  • load
  • converters
  • stability
  • operation
  • supply-systems

Cite this

@article{b59aae64ac3a42549daa58e7f64c910c,
title = "Improved instantaneous average current-sharing control scheme for parallel-connected inverter considering line impedance impact in microgrid networks",
abstract = "A new control scheme for parallel-connected inverters taking into account the effect of line impedance is presented. The system presented here consists of two single-phase inverters connected in parallel. The control technique is based on instantaneous average current-sharing control that requires interconnections among inverters for information sharing. A generalized model of a single-phase parallel-connected inverter system is derived. The model incorporates the detail of the control loops that use a proportional-resonant controller, but not the switching action. The voltage- and current-controller design and parameters selection process are discussed. Adaptive gain scheduling is introduced to the controller to improve the current and power sharing for a condition, where the line impedance is different among the inverters. The simulation results show that the adaptive gain-scheduling approaches introduced improve the performance of conventional controller in terms of current and power sharing between inverters under difference line impedance condition. The experiments validate the proposed system performance.",
keywords = "distribution generation (DG), microgrid , inverter, gain scheduling, distributed generation systems, load , converters, stability, operation, supply-systems",
author = "Roslan, {Mohd Azrik Bin} and Khaled Ahmed and Stephen Finney and Barry Williams",
year = "2011",
month = "3",
doi = "10.1109/TPEL.2010.2102775",
language = "English",
volume = "26",
pages = "702--716",
journal = "IEEE Transactions on Power Electronics",
issn = "0885-8993",
number = "3",

}

TY - JOUR

T1 - Improved instantaneous average current-sharing control scheme for parallel-connected inverter considering line impedance impact in microgrid networks

AU - Roslan, Mohd Azrik Bin

AU - Ahmed, Khaled

AU - Finney, Stephen

AU - Williams, Barry

PY - 2011/3

Y1 - 2011/3

N2 - A new control scheme for parallel-connected inverters taking into account the effect of line impedance is presented. The system presented here consists of two single-phase inverters connected in parallel. The control technique is based on instantaneous average current-sharing control that requires interconnections among inverters for information sharing. A generalized model of a single-phase parallel-connected inverter system is derived. The model incorporates the detail of the control loops that use a proportional-resonant controller, but not the switching action. The voltage- and current-controller design and parameters selection process are discussed. Adaptive gain scheduling is introduced to the controller to improve the current and power sharing for a condition, where the line impedance is different among the inverters. The simulation results show that the adaptive gain-scheduling approaches introduced improve the performance of conventional controller in terms of current and power sharing between inverters under difference line impedance condition. The experiments validate the proposed system performance.

AB - A new control scheme for parallel-connected inverters taking into account the effect of line impedance is presented. The system presented here consists of two single-phase inverters connected in parallel. The control technique is based on instantaneous average current-sharing control that requires interconnections among inverters for information sharing. A generalized model of a single-phase parallel-connected inverter system is derived. The model incorporates the detail of the control loops that use a proportional-resonant controller, but not the switching action. The voltage- and current-controller design and parameters selection process are discussed. Adaptive gain scheduling is introduced to the controller to improve the current and power sharing for a condition, where the line impedance is different among the inverters. The simulation results show that the adaptive gain-scheduling approaches introduced improve the performance of conventional controller in terms of current and power sharing between inverters under difference line impedance condition. The experiments validate the proposed system performance.

KW - distribution generation (DG)

KW - microgrid

KW - inverter

KW - gain scheduling

KW - distributed generation systems

KW - load

KW - converters

KW - stability

KW - operation

KW - supply-systems

U2 - 10.1109/TPEL.2010.2102775

DO - 10.1109/TPEL.2010.2102775

M3 - Article

VL - 26

SP - 702

EP - 716

JO - IEEE Transactions on Power Electronics

T2 - IEEE Transactions on Power Electronics

JF - IEEE Transactions on Power Electronics

SN - 0885-8993

IS - 3

ER -