Tracking Control for a DC Microgrid Feeding Uncertain Loads in More Electric Aircraft: Adaptive Backstepping Approach

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Abstract

More electric aircrafts (MEAs) comprise a vast amount of power electronic loads, which usually behave as constant power loads (CPLs). The incremental negative impedance of CPLs threatens system stability. To ensure an effective control of power flow in MEAs, eliminating the undesired behavior of CPLs is a necessity. This aim requires spontaneous power estimation of the time-varying uncertain loads. In this paper, an adaptive backstepping controller, which is interconnected to a 3rd degree cubature Kalman filter (CKF), is developed for a DC MG feeding non-ideal CPLs. At first, the load power is considered as an artificial state and augmented into the system states, which enables estimation of not only the DC MG states but also the unknown value of the load power. The estimated load power is then forwarded to a backstepping controller. The systematic approach of this controller allows obtaining the control signal, which is the duty ratio of the switch, to not only system stabilizing but also tracking a desired voltage of the DC bus under the load power variations. The proposed adaptive controller is tested on a DC MG that has one CPL. The conducted experimental results verify the proposed nonlinear control in tracking the desired voltage of the DC bus under slow and fast variations of the load power.
Original languageEnglish
JournalI E E E Transactions on Industrial Electronics
Volume66
Issue number7
Pages (from-to)5644 - 5652
Number of pages9
ISSN0278-0046
DOIs
Publication statusPublished - Jul 2019

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Backstepping
Aircraft
Controllers
Electric potential
Power electronics
System stability
Kalman filters
Switches

Keywords

  • More electric aircraft (MEA) power system
  • DC microgrid (MG)
  • Constant power load (CPL)
  • Cubature Kalman filter (CKF)
  • Adaptive backstepping controller

Cite this

@article{674ee2f68dd64e67861eb537a8f17624,
title = "Tracking Control for a DC Microgrid Feeding Uncertain Loads in More Electric Aircraft: Adaptive Backstepping Approach",
abstract = "More electric aircrafts (MEAs) comprise a vast amount of power electronic loads, which usually behave as constant power loads (CPLs). The incremental negative impedance of CPLs threatens system stability. To ensure an effective control of power flow in MEAs, eliminating the undesired behavior of CPLs is a necessity. This aim requires spontaneous power estimation of the time-varying uncertain loads. In this paper, an adaptive backstepping controller, which is interconnected to a 3rd degree cubature Kalman filter (CKF), is developed for a DC MG feeding non-ideal CPLs. At first, the load power is considered as an artificial state and augmented into the system states, which enables estimation of not only the DC MG states but also the unknown value of the load power. The estimated load power is then forwarded to a backstepping controller. The systematic approach of this controller allows obtaining the control signal, which is the duty ratio of the switch, to not only system stabilizing but also tracking a desired voltage of the DC bus under the load power variations. The proposed adaptive controller is tested on a DC MG that has one CPL. The conducted experimental results verify the proposed nonlinear control in tracking the desired voltage of the DC bus under slow and fast variations of the load power.",
keywords = "More electric aircraft (MEA) power system, DC microgrid (MG), Constant power load (CPL), Cubature Kalman filter (CKF), Adaptive backstepping controller",
author = "Shirin Yousefizadeh and Bendtsen, {Jan Dimon} and Navid Vafamand and Khooban, {Mohammad Hassan} and Frede Blaabjerg and Tomislav Dragicevic",
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Tracking Control for a DC Microgrid Feeding Uncertain Loads in More Electric Aircraft : Adaptive Backstepping Approach. / Yousefizadeh, Shirin; Bendtsen, Jan Dimon; Vafamand, Navid; Khooban, Mohammad Hassan; Blaabjerg, Frede; Dragicevic, Tomislav.

In: I E E E Transactions on Industrial Electronics, Vol. 66, No. 7, 07.2019, p. 5644 - 5652.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Tracking Control for a DC Microgrid Feeding Uncertain Loads in More Electric Aircraft

T2 - Adaptive Backstepping Approach

AU - Yousefizadeh, Shirin

AU - Bendtsen, Jan Dimon

AU - Vafamand, Navid

AU - Khooban, Mohammad Hassan

AU - Blaabjerg, Frede

AU - Dragicevic, Tomislav

PY - 2019/7

Y1 - 2019/7

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