Eigenanalysis-based small signal stability of the system of coupled sustainable microgrids

Shahnia, Farhad; Arefi, Ali

doi:10.1016/j.ijepes.2017.03.003

Cited by 46 publications

(29 citation statements)

References 49 publications

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“…Lately, the model order reduction analysis for microgrid clusters has been reported in [29] based on the theory of singularly perturbed systems. In [30]- [32], small signal stability of ideal inverter-based coupled microgrids is evaluated. Once again, however, the primary source dynamics of the DG units are ignored, and the dc voltages are assumed to be constant in [29]- [32].…”

Section: ) Interconnection Of Microgridsmentioning

confidence: 99%

Dynamic Characteristics Analysis and Stabilization of PV-Based Multiple Microgrid Clusters

Zhao

Yang

Wang

et al. 2019

IEEE Trans. Smart Grid

128

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As the penetration of PV generation increases, there is a growing operational demand on PV systems to participate in microgrid frequency regulation. It is expected that future distribution systems will consist of multiple microgrid clusters. However, interconnecting PV microgrids may lead to system interactions and instability. To date, no research work has been done to analyze the dynamic behavior and enhance the stability of microgrid clusters considering the dynamics of the PV primary sources and dc links. To fill this gap, this paper presents comprehensive modeling, analysis, and stabilization of PV-based multiple microgrid clusters. A detailed small-signal model for PV-based microgrid clusters considering local adaptive dynamic droop control mechanism of the voltage-source PV system is developed. The complete dynamic model is then used to access and compare the dynamic characteristics of the single microgrid and interconnected microgrids. In order to enhance system stability of the PV microgrid clusters, a tie-line flow and stabilization strategy is proposed to suppress the introduced interarea and local oscillations. Robustly selecting of the key control parameters is transformed to a multiobjective optimization problem which is solved by genetic algorithm (GA). The proposed damping controller can effectively damp the power oscillations and provide robust control performance under variable operating conditions. Theoretical analysis, simulation results under various scenarios are presented to verify the effectiveness of the proposed scheme.

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Section: ) Interconnection Of Microgridsmentioning

confidence: 99%

Dynamic Characteristics Analysis and Stabilization of PV-Based Multiple Microgrid Clusters

Zhao

Yang

Wang

et al. 2019

IEEE Trans. Smart Grid

128

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“…The dynamic operation of DERs within CMGs is investigated in [34] while [35] examines the dynamic security of the CMGs. The interaction among the DERs of the MGs in a CMG is studied in [36]. Reference [37] analyses the reliability aspects of a CMG while their voltage and current controllability, as well as small signal stability, are analyzed in [38][39][40].…”

Section: A Review Of Existing Literaturementioning

confidence: 99%

Multi-level supervisory emergency control for operation of remote area microgrid clusters

Batool

Shahnia

Islam

2019

J. Mod. Power Syst. Clean Energy

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Remote and regional areas are usually supplied by isolated and self-sufficient electricity systems, which are called as microgrids (MGs). To reduce the overall cost of electricity production, MGs rely on non-dispatchable renewable sources. Emergencies such as overloading or excessive generation by renewable sources can result in a substantial voltage or frequency deviation in MGs. This paper presents a supervisory controller for such emergencies. The key idea is to remedy the emergencies by optimal internal or external support. A multi-level controller with soft, intermedial and hard actions is proposed. The soft actions include the adjustment of the droop parameters of the sources and the controlling of the charge/discharge of energy storages. The intermedial action is exchanging power with neighboring MGs, which is highly probable in large remote areas. As the last remedying resort, curtailing loads or renewable sources are assumed as hard actions. The proposed controller employs an optimization technique consisting of certain objectives such as reducing power loss in the tie-lines amongst MGs and the dependency of an MG to other MGs, as well as enhancing the contribution of renewable sources in electricity generation. Minimization of the fuel consumption and emissions of conventional generators, along with frequency and voltage deviation, is the other desired objectives. The performance of the proposal is evaluated by several numerical analyses in MATLAB Ò .

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“…Although the voltage and frequency stabilities in a microgrid are analysed in an islanded mode, only the former is controlled in a grid-tied operation due to the small effect of the frequency on the grid [7] because the voltage acts as a local variable and the frequency as a global one. Both stabilities are determined through either a small-or large-disturbance analysis, with the stability of a microgrid basically dependent on its operational modes, control topology, types of DGs and loads, and network parameters [128][129][130].…”

Section: Challenges Of Microgridsmentioning

confidence: 99%

“…A small-disturbance analysis involves evaluating a microgrid's stability in terms of linearising the system around its operating points using eigenvalue analysis, Routh-Hurwitz or Nyquist stability criteria. Several small-signal analyses that deal with load fluctuations, and the influence of droop gains and variations in the line impedance on voltage and frequency characteristics are conducted in [61,62,128,129,[131][132][133]. As droop coefficients have a direct influence on a microgrid's small-signal stability, accurate design of droop coefficients and a droop control with adjustable dynamic behaviour are recommended in [61,62,134].…”

Section: Challenges Of Microgridsmentioning

confidence: 99%

Evolution of Microgrids with Converter-Interfaced Generations: Challenges and Opportunities

Hossain¹,

Pota²,

Hossain³

et al. 2018

Preprint

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Although microgrids facilitate the increased penetration of distributed generations (DGs) and improve the security of power supplies, they have some issues that need to be better understood and addressed before realising the full potential of microgrids. This paper presents a comprehensive list of challenges and opportunities supported by a literature review on the evolution of converter-based microgrids. The discussion in this paper presented with a view to establishing microgrids as distinct from the existing distribution systems. This is accomplished by, firstly, describing the challenges and benefits of using DG units in a distribution network and then those of microgrid ones. Also, the definitions, classifications and characteristics of microgrids are revised according to their specific roles to provide a sound basis for novice researchers to undertake ongoing research on microgrids.

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Eigenanalysis-based small signal stability of the system of coupled sustainable microgrids

Cited by 46 publications

References 49 publications

Dynamic Characteristics Analysis and Stabilization of PV-Based Multiple Microgrid Clusters

Dynamic Characteristics Analysis and Stabilization of PV-Based Multiple Microgrid Clusters

Multi-level supervisory emergency control for operation of remote area microgrid clusters

Evolution of Microgrids with Converter-Interfaced Generations: Challenges and Opportunities

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