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    Load frequency control for rural distributed generation

    Access Status
    Fulltext not available
    Authors
    Majumder, R.
    Ghosh, Arindam
    Ledwich, G.
    zare, F.
    Date
    2010
    Type
    Journal Article
    
    Metadata
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    Citation
    Majumder, R. and Ghosh, A. and Ledwich, G. and zare, F. 2010. Load frequency control for rural distributed generation. Electric Power Components and Systems. 38 (6): pp. 637-656.
    Source Title
    Electric Power Components and Systems
    ISSN
    1532-5008
    URI
    http://hdl.handle.net/20.500.11937/28198
    Collection
    • Curtin Research Publications
    Abstract

    In rural low-voltage networks, distribution lines are usually highly resistive. When many distributed generators are connected to such lines, power sharing among them is difficult when using conventional droop control, as the real and reactive power have strong coupling with each other. A high droop gain can alleviate this problem but may lead the system to instability. To overcome this, two droop controlmethods are proposed for accurate load sharing with frequency droop controller. The first method considers no communication among the distributed generators and regulates the output voltage and frequency, ensuring acceptable load sharing. The droop equations are modified with a transformation matrix based on the line R=X ratio for this purpose. The second proposed method, with minimal low bandwidth communication, modifies the reference frequency of the distributed generators based on the active and reactive power flow in the lines connected to the points of common coupling. The performance of these two proposed controllers is compared with that of a controller, which includes an expensive high bandwidth communication system through time-domain simulation of a test system. The magnitude of errors in power sharing between these three droop control schemes are evaluated andtabulated.

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