Microgrid transition to islanded modes: Conceptual background and simulation procedures aimed at assessing its dynamic performance

Carpio-Huayllas, Tesoro Elena Del; Ramos, Dorel Soares; Vasquez-Arnez, R.L.

doi:10.1109/tdc.2012.6281422

Cited by 8 publications

(11 citation statements)

References 18 publications

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“…Let the pair (v,ŝ) be a known solution to the load-flow problem (4). Consider some other candidate complex power injection s. Assume that…”

Section: Theoremmentioning

confidence: 99%

“…One typical case is related to the islanding maneuver, namely the disconnection from the main grid due to an intentional or non-intentional decision (e.g., [4]). In particular, with respect to the non-intentional islanding, there is a need to evaluate in real-time whether a given resource can serve as a slack for the islanded microgrid [5].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Explicit Conditions on Existence and Uniqueness of Load-Flow Solutions in Distribution Networks

Wang

Bernstein

Boudec

et al. 2018

IEEE Trans. Smart Grid

109

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Abstract-We present explicit sufficient conditions that guarantee the existence and uniqueness of the feasible load-flow solution for distribution networks with a generic topology (radial or meshed) modeled with positive sequence equivalents. In the problem, we also account for the presence of shunt elements. The conditions have low computational complexity and thus can be efficiently verified in a real system. Once the conditions are satisfied, the unique load-flow solution can be reached by a given fixed point iteration method of approximately linear complexity. Therefore, the proposed approach is of particular interest for modern active distribution network (ADN) setup in the context of real-time control. The theory has been confirmed through numerical experiments.Index Terms-load flow solution, fixed point method, existence and uniqueness, distribution networks.

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“…Let the pair (v,ŝ) be a known solution to the load-flow problem (4). Consider some other candidate complex power injection s. Assume that…”

Section: Theoremmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Explicit Conditions on Existence and Uniqueness of Load-Flow Solutions in Distribution Networks

Wang

Bernstein

Boudec

et al. 2018

IEEE Trans. Smart Grid

109

View full text Add to dashboard Cite

show abstract

“…The ability to cope with such a transition is key for ensuring the microgrid's resilience and dynamic performance [4]. In the following, when talking about islanding we always refer to the unintentional islanding transition.…”

Section: State-of-the-art On Microgrids Islandingmentioning

confidence: 99%

Real-time control of microgrids with explicit power setpoints: Unintentional islanding

Bernstein

Boudec

Reyes-Chamorro

et al. 2015

2015 IEEE Eindhoven PowerTech

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Abstract-We propose a method to perform a safe unintentional islanding maneuver of microgrids. The method is derived in the context of a framework for the real-time control of microgrids, called Commelec, recently proposed by the Authors. The framework uses a hierarchy of software agents that communicate with each other using a common, device independent protocol in order to define explicit power setpoints without the need of droop controllers. We show that the features of the framework allow to design a generic control method for treating unintentional islanding with the following properties. First, the method is able to choose the best candidate slack resource, based on the information obtained from the agents. Second, as the agent responsible for the grid has a global view of the network's status and its resources, it is possible to optimize the performance of the network during and after the islanding transition. Third, after the islanding maneuver it allows for the online switching of the slack resource to that with the best capabilities to face the network's needs. Finally, the method is suitable for inertia-less systems as the control is performed using explicit power setpoints and it does not rely on the frequency signal. We illustrate the benefits of the proposed method via simulation on the LV microgrid benchmark defined by the CIGRÉ Task Force C6.04.02, by comparing its performance to that of the standard droop-based method called load drop anticipator.

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“…2) During the grid disturbances, in the form of transient variation of phase of voltage and load voltage harmonics, and grid fau lt, disconnection of the microgrid fro m the main grid is necessary in order to prevent any impact of the disturbances on its loads [9].…”

Section: A Reasons For Islanded Operationmentioning

confidence: 99%

“…3) During the grid fault, in order to prevent the presence of any undesired active power network or system, an isolation of the active microgrid is done , by opening a switch, which connects the microgrid with the utility grid 4) Permanently isolated microgrid is designed to operate in autonomous or islanded mode for supplying its load and handle any disturbances or generation outage without any help fro m the main grid [9].…”

Section: A Reasons For Islanded Operationmentioning

confidence: 99%

An Overview of Dc-Microgrid Architecture With Renewable Energy Resources

2015

IJAERD

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-In this paper DC-microgrid architecture with Renewable Energy Resources is described. Microgrid is a part of distribution network embedding multiple distributed generation systems (mostly non-conventional renewable energy sources like wind turbine, photovoltaic panels etc.) and storage systems with local loads, which can be disconnected from the upstream network under emergency conditions or as planned. Microgrid is defined as a cluster of distributed generation sources, distributed storage devices and distributed loads that operate so as to improve the reliability and quality of the local power supply and of the power system in a controlled manner. The present power system is established on AC that provide supply to the AC power machine, but the new on-going revolution in power electronics and many smart devices are coming in the list of domestic goods, which are powered by DC. To provide DC, AC supply should be rectified and regulated which produce losses. Instead of rectification a new independent DC microgrid architecture is designed to which the DC load can be connected. In this review paper, DC microgrid architecture can be independently powered by renewable energy resources which can directl y generate DC power. This paper also presents challenges in integration of renewable energy sources and their solution of integrating renewable energy sources utilization.

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Microgrid transition to islanded modes: Conceptual background and simulation procedures aimed at assessing its dynamic performance

Cited by 8 publications

References 18 publications

Explicit Conditions on Existence and Uniqueness of Load-Flow Solutions in Distribution Networks

Explicit Conditions on Existence and Uniqueness of Load-Flow Solutions in Distribution Networks

Real-time control of microgrids with explicit power setpoints: Unintentional islanding

An Overview of Dc-Microgrid Architecture With Renewable Energy Resources

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