Energy management strategy of islanded microgrid based on power flow control

Zhang, Ye; Hong, Jin; Guo, Li

doi:10.1109/isgt.2012.6175644

Cited by 47 publications

(30 citation statements)

References 18 publications

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“…As a result, the frequency sags again. Moreover, according to (21), the frequency deviation is limited to 2%, which satisfies the standards of islanded microgrids. (i) shows the frequency waveform under the adaptive accelerating parameter n. It is clear that a smaller frequency deviation is achieved at the beginning, and that the frequency drops slowly.…”

Section: Simulation and Experiments Resultsmentioning

confidence: 99%

Elimination of the State-of-Charge Errors for Distributed Battery Energy Storage Devices in Islanded Droop-controlled Microgrids

Wang¹,

Wu²,

Zhao³

et al. 2015

Journal of Power Electronics

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Battery energy storage devices (ESDs) have become more and more commonplace to maintain the stability of islanded power systems. Considering the limitation in inverter capacity and the requirement of flexibility in the ESD, the droop control was implemented in paralleled ESDs for higher capacity and autonomous operation. Under the conventional droop control, state-of-charge (SoC) errors between paralleled ESDs is inevitable in the discharging operation. Thus, some ESDs cease operation earlier than expected. This paper proposes an adaptive accelerating parameter to improve the performance of the SoC error eliminating droop controller under the constraints of a microgrid. The SoC of a battery ESD is employed in the active power droop coefficient, which could eliminate the SoC error during the discharging process. In addition, to expedite the process of SoC error elimination, an adaptive accelerating parameter is dedicated to weaken the adverse effect of the constraints due to the requirement of the system running. Moreover, the stability and feasibility of the proposed control strategy are confirmed by small-signal analysis. The effectiveness of the control scheme is validated by simulation and experiment results.

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Section: Simulation and Experiments Resultsmentioning

confidence: 99%

Elimination of the State-of-Charge Errors for Distributed Battery Energy Storage Devices in Islanded Droop-controlled Microgrids

Wang¹,

Wu²,

Zhao³

et al. 2015

Journal of Power Electronics

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show abstract

“…The discussion of centralized control of the powerelectronics interfaced DG system with the BESS is well-known and is presented in [16][17][18]. Recently, different strategies have been proposed for energy storage balance in distributed BESUs [19][20][21][22][23][24], but these proposed method are based on a centralized control unit and employ a communications system. Thus, operating the system under these control methods involves a high level of risk, as the storage system may go out of control with a malfunction in the central control part or the communication link.…”

Section: Introductionmentioning

confidence: 99%

Distributed cooperative control of battery energy storage system in AC microgrid applications

Palizban

Kauhaniemi

2015

Journal of Energy Storage

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“…In case the minimum SoC threshold is reached, a load shedding procedure is imposed. In [4], a control strategy for the energy management of a micro-grid including two BESSs, a photovoltaic generator and a wind DG is introduced. Both the wind unit and identified loads may be switched off to guarantee stability, whereas the photovoltaic unit power injection is modified in case BESSs' active power flow exceeds defined thresholds.…”

Section: Introductionmentioning

confidence: 99%

A control strategy for the management of islanded networks with renewables and storage systems

Bignucolo

Raciti

Caldon

2014

2014 49th International Universities Power Engineering Conference (UPEC)

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Management of intentional islanded networks is becoming more and more interesting both in developed contexts and as first electrification of rural areas, presently not reached by central transmission and distribution networks. In islanded systems or network portions operating disconnected from the main grid, aiming to maximize the exploitation of renewable sources, new control strategies to guarantee frequency and voltage stability are required. An effective compensation of load variations and the optimal management of generators' unpredictability and intermittency are core objectives. In these systems, an intelligent use of local storage units can improve the network performances, besides optimizing the renewable output. A new strategy for coordinating renewable units and a storage system is introduced and tested on a realistic simplified network. Remote communication absence does not impact on the proposed controller effectiveness. Different simulations, carried out making use of DIgSILENT PowerFactory tool, show the effectiveness of the proposed strategy.

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Energy management strategy of islanded microgrid based on power flow control

Cited by 47 publications

References 18 publications

Elimination of the State-of-Charge Errors for Distributed Battery Energy Storage Devices in Islanded Droop-controlled Microgrids

Elimination of the State-of-Charge Errors for Distributed Battery Energy Storage Devices in Islanded Droop-controlled Microgrids

Distributed cooperative control of battery energy storage system in AC microgrid applications

A control strategy for the management of islanded networks with renewables and storage systems

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