TY - JOUR
T1 - Decentralized optimal frequency control in autonomous microgrids
AU - Khayat, Yousef
AU - Naderi, Mobin
AU - Shafiee, Qobad
AU - Batmani, Yazdan
AU - Fathi, Mohammad
AU - Guerrero, Josep M.
AU - Bevrani, Hassan
PY - 2019/5
Y1 - 2019/5
N2 - This paper proposes a decentralized optimal secondary controller for frequency regulation and accurate active power sharing in autonomous microgrids. This optimal controller does not require any communication network. Unlike most of the existing works, a systematic approach of secondary controller design is introduced based on a quadratic cost function in the form of a linear quadratic regulator (LQR) solution. The design procedure only depends on the cut-off frequency of the power calculation filter. Decentralized behavior, simplicity, optimality based on a quadratic cost function, and straight forward design procedure are the main advantages of this approach. Using the proposed solution, frequency can be restored immediately following any disturbance in the system, without need of any event-driven and time-dependent protocol. Experimental results validate the effectiveness of the proposed controller.
AB - This paper proposes a decentralized optimal secondary controller for frequency regulation and accurate active power sharing in autonomous microgrids. This optimal controller does not require any communication network. Unlike most of the existing works, a systematic approach of secondary controller design is introduced based on a quadratic cost function in the form of a linear quadratic regulator (LQR) solution. The design procedure only depends on the cut-off frequency of the power calculation filter. Decentralized behavior, simplicity, optimality based on a quadratic cost function, and straight forward design procedure are the main advantages of this approach. Using the proposed solution, frequency can be restored immediately following any disturbance in the system, without need of any event-driven and time-dependent protocol. Experimental results validate the effectiveness of the proposed controller.
KW - Active power sharing
KW - Autonomous microgrids
KW - Decentralized secondary control
KW - Frequency control
KW - Linear quadratic regulator
UR - http://www.scopus.com/inward/record.url?scp=85059281068&partnerID=8YFLogxK
U2 - 10.1109/TPWRS.2018.2889671
DO - 10.1109/TPWRS.2018.2889671
M3 - Journal article
AN - SCOPUS:85059281068
SN - 0885-8950
VL - 34
SP - 2345
EP - 2353
JO - IEEE Transactions on Power Systems
JF - IEEE Transactions on Power Systems
IS - 3
M1 - 8588380
ER -