Voltage security in AC microgrids: a power flow-based approach considering droop-controlled inverters

Antonio Carlos Zambroni de Souza; Marcos Santos; Miguel Castilla; Jaume Miret; Luis García de Vicuña; Diogo Marujo

Voltage security in AC microgrids: a power flow-based approach considering droop-controlled inverters

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Author(s): Antonio Carlos Zambroni de Souza ¹ ; Marcos Santos ¹ ; Miguel Castilla ² ; Jaume Miret ² ; Luis García de Vicuña ² ; Diogo Marujo ¹
- Affiliations: 1: Institute of Electrical Systems and Energy, Federal University of Itajubá, Itajubá, Brazil ;
  2: Department of Electronic Engineering, Technical University of Catalonia, Vilanova i la Geltrú, Spain
Source: Volume 9, Issue 8, November 2015, p. 954 – 960
DOI: 10.1049/iet-rpg.2014.0406 , Print ISSN 1752-1416, Online ISSN 1752-1424

Received 23/11/2014, Accepted 11/05/2015, Revised 13/04/2015, Published

This study deals with the problem of voltage security in microgrids. In general, voltage security is an issue for power systems, where the lack of reactive power is a concern. For microgrids a complexity is imposed, since frequency and voltage level deviations may take place by the operation of droop-controlled inverters. This study incorporates the load margin calculation into a microgrid structure. For this purpose, a special power flow program is developed in order to consider the effects of the droop-controlled inverters. Simulation results are obtained with the help of an islanded distribution system with only generators coupled by droop-controlled inverters, so the proposed methodology may be tested and discussed.

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Voltage security in AC microgrids: a power flow-based approach considering droop-controlled inverters

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