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
N2 - 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.
AB - 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.
KW - More electric aircraft (MEA) power system
KW - DC microgrid (MG)
KW - Constant power load (CPL)
KW - Cubature Kalman filter (CKF)
KW - Adaptive backstepping controller
KW - dc microgrid (MG)
KW - cubature Kalman filter (CKF)
KW - constant power load (CPL)
KW - more electric aircraft power system
UR - http://www.scopus.com/inward/record.url?scp=85056720461&partnerID=8YFLogxK
U2 - 10.1109/TIE.2018.2880666
DO - 10.1109/TIE.2018.2880666
M3 - Journal article
SN - 0278-0046
VL - 66
SP - 5644
EP - 5652
JO - I E E E Transactions on Industrial Electronics
JF - I E E E Transactions on Industrial Electronics
IS - 7
M1 - 8536921
ER -