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Author(s): Carlos Moreira
J. A. Peças Lopes
Title: Microgrids operation and control under emergency conditions
Issue Date: 2012
Abstract: MicroGrids comprise low voltage distribution systems with distributedenergy sources, storage devices and controllable loads, operated connected to themain power network or autonomously, in a controlled coordinated way. In case ofMicroGrids autonomous operation, management of instantaneous active powerbalance imposes unique challenges. Traditionally, power grids are supplied bysources having rotating masses and these are regarded as essential for the inherentstability of the system. In contrast, MicroGrids are dominated by inverter interfacedsources that are inertia-less, but do offer the possibility of a more flexibleoperation. When a forced or scheduled islanding takes place in a MicroGrid, itmust have the ability to operate stably and autonomously, requiring the use ofsuitable control strategies. The MicroGrid power sources can also be exploited inorder to locally promote a service restoration strategy following a general blackout.A sequence of actions for the black start procedure is also presented and it isexpected to be an advantage in terms of reliability as a result from the presence ofvery large amounts of dispersed generation in distribution grids.
Subject: Engenharia electrotécnica, electrónica e informática
Electrical engineering, Electronic engineering, Information engineering
Scientific areas: Ciências da engenharia e tecnologias::Engenharia electrotécnica, electrónica e informática
Engineering and technology::Electrical engineering, Electronic engineering, Information engineering
Source: Smart Power Grids 2011
Document Type: Capítulo ou Parte de Livro
Rights: restrictedAccess
Appears in Collections:FEUP - Capítulo ou Parte de Livro

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