A method for in-situ measurement of grid impedance and load impedance at 2 k–150 kHz

Junzhe Tan, Dongsheng Zhao, Braham Ferreira

    Research output: Chapter in Book/Conference proceedings/Edited volumeConference contributionScientificpeer-review

    5 Citations (Scopus)


    A new approach to measure the grid and load impedance of converters in-situ at frequency range 2k-150 kHz has been developed. It is called three-probe approach. This approach allows impedance measurements of power supplies and electric appliances without interrupting their normal operations. The measurement accuracy is improved by proper Fast Fourier Transform (FFT) process to obtain both amplitude and phase information in the measurement. With the proposed setup, the equivalent model consisting of both resistive and reactive components can be derived to represent the grid and load in this frequency range. Grid impedance at different locations and load impedance of various solid state lamps and a SMPS are measured and the results are shown in the paper.
    Original languageEnglish
    Title of host publicationProceedings of the 9th International Conference on Power Electronics-ECCE Asia, ICPE-ECCE Asia 2015
    EditorsHG Kim, DF Tan
    Place of PublicationPiscataway, NJ
    Number of pages6
    ISBN (Electronic)978-8-9570-8254-6
    Publication statusPublished - 2015
    Event9th International Conference on Power Electronics - ECCE Asia: Green World with Power Electronics - Seoul, Korea, Republic of
    Duration: 1 Jun 20155 Jun 2015
    Conference number: 9

    Publication series



    Conference9th International Conference on Power Electronics - ECCE Asia
    Abbreviated titleICPE-2015 ECCE Asia
    CountryKorea, Republic of
    Internet address


    • in-situ measurement
    • Electromagnetic interference (EMI)
    • grid impedance
    • load impedance

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