Digital Ground Fault Protection of Grid-Connected Photovoltaic Systems

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

    5 Scopus citations

    Abstract

    The growing interests in utilizing Photovoltaic (PV) systems are usually faced with challenges of accurate and reliable protection of these distributed generation units. A desired protection of PV systems has to effectively and accurately detect and respond to internal faults (within the PV system) and external faults (in the host grid and/or fed loads). This paper presents and tests the performance of a digital ground fault protection (DGFP) for grid-connected PV systems. The presented DGFP detects faults based on the energy contents of high frequency sub-bands of the ground current. These energy contents are extracted using the phaselet transform that can process signals with non-stationary variations in their phases. Energy contents of the high frequency sub-bands can provide accurate, fast, and reliable detection and identification of faults experienced by a PV system operated. The phaselet-transform (PHT)-based DGFP is implemented for performance testing using PV systems that are operated in the grid-connected mode, and subjected to various fault and non-fault events. Performance results demonstrate accurate, fast, and reliable detection and response to different types of fault and non-fault events. Response features of the PHT-based DGFP are complimented with minor sensitivity to the level of power production and/or type and location of faults.

    Original languageBritish English
    Title of host publication2023 IEEE/IAS 59th Industrial and Commercial Power Systems Technical Conference, I and CPS 2023
    PublisherInstitute of Electrical and Electronics Engineers Inc.
    ISBN (Electronic)9798350396515
    DOIs
    StatePublished - 2023
    Event59th IEEE/IAS Industrial and Commercial Power Systems Technical Conference, I and CPS 2023 - Las Vegas, United States
    Duration: 21 May 202325 May 2023

    Publication series

    NameConference Record - Industrial and Commercial Power Systems Technical Conference
    Volume2023-May

    Conference

    Conference59th IEEE/IAS Industrial and Commercial Power Systems Technical Conference, I and CPS 2023
    Country/TerritoryUnited States
    CityLas Vegas
    Period21/05/2325/05/23

    Keywords

    • digital filter banks
    • digital protection
    • Grid-connected photovoltaic systems
    • ground current
    • phaselet transform
    • photovoltaic system faults
    • photovoltaic system protection

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