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  • A Novel Sliding Mode Estimation for Microgrid Control with Communication Time Delays

    Author(s)
    Yan, Huaicheng
    Zhou, Xuping
    Zhang, Hao
    Yang, Fuwen
    Wu, Zheng-Guang
    Griffith University Author(s)
    Yang, Fuwen
    Year published
    2019
    Metadata
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    Abstract
    This paper deals with the sliding mode estimation for microgrid with time delays. Delay has a great impact on large power grids’ (LPG) management for microgrid, which terribly reduces the stability and quality of microgrid. Random delay caused by load dependent congestion, constant transmission delay and constant delay in microgrid are considered in this paper. To eliminate the adverse effects of delays, a novel sliding mode estimation-based controller is designed to predict time delays and microgrid states, and to reject the disturbance of estimation errors. The mathematical inverter model containing electrical characteristics ...
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    This paper deals with the sliding mode estimation for microgrid with time delays. Delay has a great impact on large power grids’ (LPG) management for microgrid, which terribly reduces the stability and quality of microgrid. Random delay caused by load dependent congestion, constant transmission delay and constant delay in microgrid are considered in this paper. To eliminate the adverse effects of delays, a novel sliding mode estimation-based controller is designed to predict time delays and microgrid states, and to reject the disturbance of estimation errors. The mathematical inverter model containing electrical characteristics is regarded as the model of practical microgrid system. Delay estimation with learning parameter and state estimation are derived according to the inverter model. By regarding estimation errors as disturbance of sliding mode control (SMC), the control signal of SMC is adaptively changed in the sliding mode estimation-based control loop to ensure the stability of system and accuracy of estimation. Exponential reaching law (ERL) is implemented to improve the chattering issues and reaching performance of SMC. Lyapunov approach is exploited to analyze the stability of sliding motion. Finally, the proposed SMC strategy is validated by simulation experiments of a microgrid with time delays.
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    Journal Title
    IEEE Transactions on Smart Grid
    DOI
    https://doi.org/10.1109/TSG.2017.2771493
    Subject
    Electrical engineering
    Electronics, sensors and digital hardware
    Other engineering
    Publication URI
    http://hdl.handle.net/10072/370335
    Collection
    • Journal articles

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