A hybrid damping method for LLCL-filter based grid-tied inverter with a digital filter and an RC parallel passive damper

Weimin Wu, Zhe Lin, Yunjie Sun, Xiongfei Wang, Min Huang, Huai Wang, Frede Blaabjerg, Henry Shu Hung Chung

    Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

    8 Scopus citations

    Abstract

    Grid-tied inverters have been widely used to inject the renewable energies into the distributed power generation systems. However, a large variation of the grid impedance challenges the stability of the high-order power filter based grid-tied inverter. Many passive and active damping methods have been proposed to overcome this issue. Recently, a composite passive damping method for a high-order power filter based grid-tied inverter with an RC parallel damper and an RL series damper was presented to eliminate this problem, but at the cost of more material and power losses. In this paper, a hybrid damping method with a digital filter and an RC parallel damper is proposed. The design of the digital filter is developed using a normalized method. The validity is verified through the simulations and the experiments on a 500 W, 110 V/50 Hz prototype, while the grid inductance varies from 0.15 mH to 5 mH.

    Original languageBritish English
    Title of host publication2013 IEEE Energy Conversion Congress and Exposition, ECCE 2013
    Pages456-463
    Number of pages8
    DOIs
    StatePublished - 2013
    Event5th Annual IEEE Energy Conversion Congress and Exhibition, ECCE 2013 - Denver, CO, United States
    Duration: 15 Sep 201319 Sep 2013

    Publication series

    Name2013 IEEE Energy Conversion Congress and Exposition, ECCE 2013

    Conference

    Conference5th Annual IEEE Energy Conversion Congress and Exhibition, ECCE 2013
    Country/TerritoryUnited States
    CityDenver, CO
    Period15/09/1319/09/13

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