PI-Consensus Based Distributed Control of AC Microgrids

The conventional voltage observer based distributed control can make a tradeoff between voltage restoration and reactive power sharing. However, it suffers from estimation error when there exist input disturbances, such as initial values and communication delays. To address this problem, this paper...

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Vydáno v:	IEEE transactions on power systems Ročník 35; číslo 3; s. 2268 - 2278
Hlavní autoři:	Shi, Mengxuan, Chen, Xia, Zhou, Jianyu, Chen, Yin, Wen, Jinyu, He, Haibo
Médium:	Journal Article
Jazyk:	angličtina
Vydáno:	New York IEEE 01.05.2020 The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Témata:	Algorithms Computer simulation Control stability Control systems design Decentralized control Delays Distributed generation distributed generator (DG) Disturbances Frequency control Microgrid Microgrids Observers PI consensus algorithm Reactive power Restoration Systems stability time delay Voltage control Voltage controllers
ISSN:	0885-8950, 1558-0679
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Abstract	The conventional voltage observer based distributed control can make a tradeoff between voltage restoration and reactive power sharing. However, it suffers from estimation error when there exist input disturbances, such as initial values and communication delays. To address this problem, this paper proposes a novel distributed secondary control based on PI consensus algorithm. A voltage controller and a frequency controller are designed separately to realize the restoration of voltage/frequency and also accurate reactive/active power allocation. Moreover, a detailed small-signal model with PI consensus algorithm is established to show the impact of the proposed control strategy on the system stability. Compared with the conventional distributed control, the proposed control scheme is simpler with higher control accuracy under input disturbances. Simulations are conducted to verify the effectiveness of the proposed control strategy in an isolated ac microgrid.
AbstractList	The conventional voltage observer based distributed control can make a tradeoff between voltage restoration and reactive power sharing. However, it suffers from estimation error when there exist input disturbances, such as initial values and communication delays. To address this problem, this paper proposes a novel distributed secondary control based on PI consensus algorithm. A voltage controller and a frequency controller are designed separately to realize the restoration of voltage/frequency and also accurate reactive/active power allocation. Moreover, a detailed small-signal model with PI consensus algorithm is established to show the impact of the proposed control strategy on the system stability. Compared with the conventional distributed control, the proposed control scheme is simpler with higher control accuracy under input disturbances. Simulations are conducted to verify the effectiveness of the proposed control strategy in an isolated ac microgrid.
Author	Wen, Jinyu Zhou, Jianyu Shi, Mengxuan He, Haibo Chen, Yin Chen, Xia
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SubjectTerms	Algorithms Computer simulation Control stability Control systems design Decentralized control Delays Distributed generation distributed generator (DG) Disturbances Frequency control Microgrid Microgrids Observers PI consensus algorithm Reactive power Restoration Systems stability time delay Voltage control Voltage controllers
Title	PI-Consensus Based Distributed Control of AC Microgrids
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