Optimal, Nonlinear, and Distributed Designs of Droop Controls for DC Microgrids

    Authors

    A. Maknouninejad; Z. H. Qu; F. L. Lewis;A. Davoudi

    Comments

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    Abbreviated Journal Title

    IEEE Trans. Smart Grid

    Keywords

    Conventional droop control; cooperative droop control; DC microgrid; distributed generation; distribution network; smart grid; MANAGEMENT; GENERATION; INVERTERS; STRATEGY; MODEL; Engineering, Electrical & Electronic

    Abstract

    In this paper, the problem of optimal voltage and power regulation is formulated for distributed generators (DGs) in DC microgrids. It is shown that the resulting control is optimal but would require the full information of the microgrid. Relaxation of information requirement reduces the optimal control into several controls including the conventional droop control. The general setting of a DC microgrid equipped with local sensing/communication network calls for the design and implementation of a cooperative droop control that uses the available local information and coordinates voltage control in a distributed manner. The proposed cooperative droop control is shown to include other controls as special cases, its performance is superior to the conventional droop control, and it is robust with respect to uncertain changes in both distribution network and sensing/communication network. These features make the proposed control an effective scheme for operating a DC microgrid with intermittent and distributed generation.

    Journal Title

    Ieee Transactions on Smart Grid

    Volume

    5

    Issue/Number

    5

    Publication Date

    1-1-2014

    Document Type

    Article

    Language

    English

    First Page

    2508

    Last Page

    2516

    WOS Identifier

    WOS:000342163500037

    ISSN

    1949-3053

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