Accurate Measurement of Converter Sequence Impedance Responses by Active Cancellation of Coupling over Frequency

Tommi Reinikka; Tomi Roinila; Jian Sun

doi:10.1109/eGRID48402.2019.9092692

Accurate Measurement of Converter Sequence Impedance Responses by Active Cancellation of Coupling over Frequency

Tommi Reinikka, Tomi Roinila, Jian Sun

Electrical Engineering

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Scientific › peer-review

3 Citations (Scopus)

41 Downloads (Pure)

Abstract

Impedance-based analysis plays important role in assessing the stability and dynamics of grid-connected inverters and related systems. Measuring the inverter impedance is, however, not straightforward due to the load effect caused by the power grid. The power grid interacts with the inverter and produces additional (mirrored) frequency harmonics thus distorting the impedance measurements when applying conventional measurement techniques. This paper proposes an active-power filtering method to minimize the undesired load effect caused by the power grid in the measured impedance. Applying the method, the inverter output impedance can be reliably measured under non-ideal grid conditions.

Original language	English
Title of host publication	2019 4th IEEE Workshop on the Electronic Grid (eGRID)
Publisher	IEEE
Number of pages	6
ISBN (Electronic)	978-1-7281-5704-7
ISBN (Print)	978-1-7281-5705-4
DOIs	https://doi.org/10.1109/eGRID48402.2019.9092692
Publication status	Published - 2019
Publication type	A4 Article in conference proceedings
Event	IEEE Workshop on the Electronic Grid - Duration: 1 Jan 1900 → …

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Conference	IEEE Workshop on the Electronic Grid
Period	1/01/00 → …

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10.1109/eGRID48402.2019.9092692

Accurate Measurement of Converter Sequence Impedance by Active Cancellation of Coupling Over Frequency-1
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https://urn.fi/URN:NBN:fi:tuni-202110207729

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title = "Accurate Measurement of Converter Sequence Impedance Responses by Active Cancellation of Coupling over Frequency",

abstract = "Impedance-based analysis plays important role in assessing the stability and dynamics of grid-connected inverters and related systems. Measuring the inverter impedance is, however, not straightforward due to the load effect caused by the power grid. The power grid interacts with the inverter and produces additional (mirrored) frequency harmonics thus distorting the impedance measurements when applying conventional measurement techniques. This paper proposes an active-power filtering method to minimize the undesired load effect caused by the power grid in the measured impedance. Applying the method, the inverter output impedance can be reliably measured under non-ideal grid conditions.",

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N2 - Impedance-based analysis plays important role in assessing the stability and dynamics of grid-connected inverters and related systems. Measuring the inverter impedance is, however, not straightforward due to the load effect caused by the power grid. The power grid interacts with the inverter and produces additional (mirrored) frequency harmonics thus distorting the impedance measurements when applying conventional measurement techniques. This paper proposes an active-power filtering method to minimize the undesired load effect caused by the power grid in the measured impedance. Applying the method, the inverter output impedance can be reliably measured under non-ideal grid conditions.

AB - Impedance-based analysis plays important role in assessing the stability and dynamics of grid-connected inverters and related systems. Measuring the inverter impedance is, however, not straightforward due to the load effect caused by the power grid. The power grid interacts with the inverter and produces additional (mirrored) frequency harmonics thus distorting the impedance measurements when applying conventional measurement techniques. This paper proposes an active-power filtering method to minimize the undesired load effect caused by the power grid in the measured impedance. Applying the method, the inverter output impedance can be reliably measured under non-ideal grid conditions.

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ER -

Accurate Measurement of Converter Sequence Impedance Responses by Active Cancellation of Coupling over Frequency

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