NDLI: Application of the power flow calculation method to islanding micro grids

Content Provider	IEEE Xplore Digital Library
Author	Liu, Y.H. Wu, Z.Q. Lin, S.J. Brandon, N.P.
Copyright Year	2009
Description	Author affiliation: College of Electrical Power, South China University of Technology, Guangzhou 510640, Guangdong Province, China (Lin, S.J.) \|\| College of Electrical and Information Engineering, Hunan University, Changsha 410082, Hunan Province, China (Liu, Y.H.; Wu, Z.Q.) \|\| Earth Science and Engineering Department, Imperial College London, London SW7 2AZ, UK (Brandon, N.P.)
Abstract	Most existing power flow calculation methods use a swing bus as a reference node for the whole system. Increasingly, new distributed generation resources (DGRs) are being added to the grid. Sometimes, local demand or failure of the grid can result in independent micro-grids forming, which are known as ‘islanding’ systems. However, current DGRs are often limited such that there is no single DGR which can balance the power demand and stabilize the frequency of the micro-grid, meaning that there is no swing bus from which the micro-grid can be managed. According to existing research, a DGR coupled with a dedicated energy storage system and suitable control strategy (here termed a distributed generation (DG) system) has the ability to adjust its output. This means that a DG system can respond dynamically to grid events. This means that a DG system can respond dynamically to grid events. In this paper, a new power flow calculation method (based on Newton-Raphson power flow solution) with good convergence is proposed that can accommodate the lack of a swing bus in an islanding system. This addresses power flow results and the frequency of the whole system. The method proposed is discussed in detail with examples of different DG systems with various adjustment coefficients and load models. The results are compared with those of a traditional power flow calculation method based around the use of a swing bus. In conclusion, this paper shows that the improved method is more appropriate for islanding systems with mesh topology and for micro-grid management with no swing bus.
Starting Page	1
Ending Page	6
File Size	418615
Page Count	6
File Format	PDF
ISBN	9781424449347
DOI	10.1109/SUPERGEN.2009.5348257
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-04-06
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Power demand Islanding Power Flow Calculation Power system management Control systems Power system modeling Load flow Micro Grid Distributed Generation Power System Distributed control Frequency Energy management Energy storage Load modeling
Content Type	Text
Resource Type	Article

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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