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    Power Quality Assessment for AC/DC Hybrid Network Based on New Modelling Methods and On-Site Measurements

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    CIRED 2019 - 527.pdf (936.3Kb)
    Paper number
    527
    Conference name
    CIRED 2019
    Conference date
    3-6 June 2019
    Conference location
    Madrid, Spain
    Peer-reviewed
    Yes
    Metadata
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    Authors
    GAO, Shiqiao, EDF(China) Holding Ltd., China
    NIU, xingyan, EDF(China) Holding Ltd., China
    YANG, Xavier, EDF Lab Paris Saclay, France
    ZHAO, Bo, Zhejiang EPRI of SGCC, China
    Abstract
    AC/DC hybrid network has become a new trend in power distribution and transmission system. It possesses the advantages like decreasing the power loss of AC/DC or DC/AC conversion by the direct power supply to AC and DC loads and increasing the reliability of network, etc. However, the power quality issues in this kind of grid have not been enough addressed and considered comparing to the individual AC network or DC network. How to evaluate power quality in DC grid and what’s the influence between DC part and AC part? Even more questions related to power quality and modelling methods in AC/DC hybrid network need to be answered and explored.The subject addressed in this paper is the power quality assessment which is carried out by new modelling methods and an experimental analysis of a real AC/DC hybrid network. DC voltage variation, voltage unbalance and harmonics (ripples in DC) in both AC and DC voltage are analysed in “grid-connected” mode or “islanding” mode. Furthermore, the dynamic impedance of battery converter is calculated during transient event, which is one of the key parameters to assess static power source behaviours and evaluate the potential power quality level when a new load is connected to the grid based on mainly power electronic interfaced supply sources. The simulated results are then validated by on-site measurements with very acceptable error.
    Publisher
    AIM
    Date
    2019-06-03
    Published in
    • CIRED 2019 Conference
    Permanent link to this record
    https://cired-repository.org/handle/20.500.12455/46
    http://dx.doi.org/10.34890/100
    ISSN
    2032-9644
    ISBN
    978-2-9602415-0-1

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