Adaptive voltage droop scheme for voltage source converters in an islanded multibus microgrid

Adaptive voltage droop scheme for voltage source converters in an islanded multibus microgrid

For access to this article, please select a purchase option:

Buy article PDF
(plus tax if applicable)
Buy Knowledge Pack
10 articles for £75.00
(plus taxes if applicable)

IET members benefit from discounts to all IET publications and free access to E&T Magazine. If you are an IET member, log in to your account and the discounts will automatically be applied.

Learn more about IET membership 

Recommend to library

You must fill out fields marked with: *

Librarian details
Your details
Why are you recommending this title?
Select reason:
IET Generation, Transmission & Distribution — Recommend this title to your library

Thank you

Your recommendation has been sent to your librarian.

In this study, a novel voltage droop scheme for the parallel operation of voltage source converters (VSCs) in an islanded multibus microgrid is proposed. In this scheme, the voltage droop coefficient is defined as a function of respective VSC active and reactive power outputs. Thus, each VSCs voltage reference is adaptively drooped as a non-linear function of its active and reactive power outputs. This approach leads to reduction in the reactive power sharing dependence on real power control and system parameters such as mismatched connecting and line impedances. A multiobjective index is introduced for evaluating the scheme performance. The index is used as an objective function in an optimisation problem that is employed to obtain optimal parameters of the scheme. The detailed analysis shows that this scheme has a superior behaviour compared to the conventional voltage droop method, in view of the reactive power sharing and loads voltage control under all loading conditions. Simulation and experimental results show the good performance of the method for three paralleled VSCs in a multibus microgrid system.


    1. 1)
    2. 2)
    3. 3)
      • F. Gao , M.R. Iravani . A control strategy for a distributed generation unit in grid-connected and autonomous modes of operation. IEEE Trans. Power Deliv. , 2 , 850 - 859
    4. 4)
      • J.A. Pecas Lopes , C.L. Moreira , A.G. Madureira . Defining control strategies for microgrids islanded operation. IEEE Trans. Power Syst. , 2 , 916 - 924
    5. 5)
      • E.A.A. Coelho , P.C.C. Cortizo , P.F.D. Garcia . Small-signal stability for parallel-connected inverters in stand-alone AC supply systems. IEEE Trans. Ind. Appl. , 2 , 533 - 542
    6. 6)
    7. 7)
    8. 8)
    9. 9)
    10. 10)
    11. 11)
    12. 12)
      • A. Tuladhar , H. Jin , T. Unger , K. Mauch . Control of parallel inverters in distributed AC power system with consideration of line impedance effect. IEEE Trans. Ind. Appl. , 1 , 131 - 137
    13. 13)
      • C.K. Sao , P.W. Lehn . Control and power management of converter fed microgrids. IEEE Trans. Power Syst. , 3 , 1088 - 1098
    14. 14)
      • A. Engler . Applicability of droops in low voltage grids. DER J. , 1 - 5
    15. 15)
      • M.J. Ryan , R.W. De Doncker , R.D. Lorenz . Decoupled control of a four-leg inverter via a new 4×4 transformation matrix. IEEE Trans. Power Electron. , 5 , 694 - 701
    16. 16)
    17. 17)
    18. 18)
      • T.C. Green , M. Prodanovic . Control of inverter-based micro-grids. Electr. Power Syst. Res. , 1204 - 1213

Related content

This is a required field
Please enter a valid email address