Decentralized Optimal Frequency Control in Autonomous Microgrids

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 d...

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Veröffentlicht in:IEEE transactions on power systems Jg. 34; H. 3; S. 2345 - 2353
Hauptverfasser: Khayat, Yousef, Naderi, Mobin, Shafiee, Qobad, Batmani, Yazdan, Fathi, Mohammad, Guerrero, Josep M., Bevrani, Hassan
Format: Journal Article
Sprache:Englisch
Veröffentlicht: New York IEEE 01.05.2019
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Schlagworte:
active power sharing
Autonomous microgrids
Communication networks
Control systems design
Controllers
Cost function
decentralized secondary control
Electric power distribution
Electric power grids
Frequency control
Inverters
Linear quadratic regulator
Microgrids
Optimization
Power filters
Reliability
Time dependence
Voltage control
ISSN:0885-8950, 1558-0679
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Zusammenfassung: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.
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ISSN:0885-8950
1558-0679
DOI:10.1109/TPWRS.2018.2889671