A Novel Approach to Solve Power Flow for Islanded Microgrids Using Modified Newton Raphson With Droop Control of DG

The study of power flow analysis for microgrids has gained importance where several methods have been proposed to solve these problems. However, these schemes are complicated and not easy to implement due to the absence of a slack bus as well as the dependence of the power on frequency as a result o...

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Bibliographic Details
Published in:IEEE transactions on sustainable energy 2016-04, Vol.7 (2), p.493-503
Main Authors: Mumtaz, Faisal, Syed, M. H., Hosani, Mohamed Al, Zeineldin, H. H.
Format: Article
Language:English
Subjects:
Computer programs
Computer simulation
Distributed generation (DG)
Electric power grids
Impedance
islanded microgrid
Jacobian matrices
Load modeling
Mathematical analysis
Mathematical model
Microgrids
Newton-Raphson method
Power flow
Reactive power
Renewable energy
Software
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Summary:The study of power flow analysis for microgrids has gained importance where several methods have been proposed to solve these problems. However, these schemes are complicated and not easy to implement due to the absence of a slack bus as well as the dependence of the power on frequency as a result of the droop characteristics. This paper proposes simple and effective modifications to the conventional method (Newton Raphson) to compute the power flow for microgrids. The presented method provides a simple, easy to implement, and accurate approach to solve the power flow equations for microgrids. The proposed method is applied to two test systems: a 6-bus system and a 38-bus system. The results are compared against simulation results from PSCAD/EMTDC which validate the effectiveness of the developed method. The proposed technique can be easily integrated in current commercially available power system software and can be applied for power system studies.
ISSN:1949-3029
1949-3037
DOI:10.1109/TSTE.2015.2502482