Control principles for blackstart and island operation of microgrid

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Journal Title
Journal ISSN
Volume Title
A4 Artikkeli konferenssijulkaisussa
Date
2008
Department
Major/Subject
Mcode
Degree programme
Language
en
Pages
8
Series
Proceedings of the Nordic Workshop on Power and Industrial Electronics (NORPIE/2008)
Abstract
In some unexpected situations a microgrid may become unstable after transition to islanded mode and all DG units must be disconnected from microgrid. In case of these events a restoration strategy for microgrid blackstart is needed. Also if the islanded microgrid is divided into different protection zones in case of a fault, fault management strategy with capability of very fast operation is needed to maintain stability in the healthy section of the islanded microgrid. The control of microgrid voltage and frequency during the microgrid blackstart is not possible without energy storage unit. In this paper sequence of actions for the microgrid blackstart operation as well as control principles of some DG units during blackstart are defined and simulated with two different microgrid configurations. Also one simulation case considering fault management strategy and control principles during fault in islanded microgrid is presented. Based on the simulations dimensioning principles for the needed energy storage and size of simultaneously controlled loads can be drawn.
Description
Keywords
blackstart, distributed generation, energy storage, frequency control, islanding, low voltage network, microgrid, stability, voltage control
Other note
Citation
Permanent link to this item
https://urn.fi/urn:nbn:fi:tkk-011614