Multi-agent system based adaptive protection for dispersed generation integrated distribution systems

Author(s): Chengxi Liua*, Zakir Hussain Rathera,b, Zhe Chena, Claus Leth Baka
Department of Energy Technology, Aalborg University, 9220 Aalborg Denmark
Innovation Center, kk-electronic, a/s, 9220 Aalborg Denmark
International Journal of Smart Grid and Clean Energy, vol. 2, no. 3, October 2013: pp. 406-412
ISSN: 2315-4462
Digital Object Identifier: 10.12720/sgce.2.3.406-412

Abstract: The increasing penetration of dispersed generation (DG) brings challenges to conventional protection approaches of distribution system, mainly due to bi-directional power flow and variable fault current contribution from different generation technology-based DG units. Moreover, the trend of allowing islanded operation of distribution systems necessitates the adoption of adaptive protection methods for distribution systems. In order to improve the reliability and selectivity of protection for such kind of distribution systems, a coordinative adaptive protection based on multi- agent system (MAS) is proposed. The adaptive protection intelligently adopts suitable settings for the variation of fault current from diversified DG units. Furthermore, the structure of mobile MAS with additional flexibility is capable of adapting the changes of system topology in a short period, e.g. radial/meshed, grid-connected/islanded. The protection method is tested on a simplified distribution system model of Denmark in DIgSILENT/PowerFactory.

Keywords: Adaptive protection, dispersed generation, distribution protection, multi-agent system

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