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Voltage unbalance emission assessment in radial power systems

Journal Article


Abstract


  • Voltage unbalance (VU) emission assessment is an

    integral part in the VU-management process where loads are

    allocated a portion of the unbalance absorption capacity of the

    power system. The International Electrotechnical Commission

    Report IEC/TR 61000-3-13:2008 prescribes a VU emission allocation

    methodology establishing the fact that the VU can arise

    at the point of common connection (PCC) due to upstream network

    unbalance and load unbalance. Although this is the case

    for emission allocation, approaches for post connection emission

    assessment do not exist except for cases where the load is the

    only contributor to the VU at the PCC. Such assessment methods

    require separation of the post connection VU emission level into

    its constituent parts. In developing suitable methodologies for this

    purpose, the pre and postconnection data requirements need to be

    given due consideration to ensure that such data can be easily established.

    This paper presents systematic, theoretical bases which

    can be used to assess the individual VU emission contributions

    made by the upstream source, asymmetrical line, and the load

    for a radial power system. The methodology covers different load

    configurations including induction motors. Assessments obtained

    by employing the theoretical bases on the study system were

    verified by using unbalanced load-flow analysis in MATLAB and

    using DIgSILENT PowerFactory software.

Authors


  •   Jayatunga, Upuli (external author)
  •   Perera, Sarath
  •   Ciufo, Phil (external author)

Publication Date


  • 2012

Citation


  • U. Jayatunga, S. Perera & P. Ciufo, "Voltage unbalance emission assessment in radial power systems," IEEE Transactions on Power Delivery, vol. 27, (3) pp. 1653-1661, 2012.

Ro Metadata Url


  • http://ro.uow.edu.au/infopapers/2197

Number Of Pages


  • 8

Start Page


  • 1653

End Page


  • 1661

Volume


  • 27

Issue


  • 3

Abstract


  • Voltage unbalance (VU) emission assessment is an

    integral part in the VU-management process where loads are

    allocated a portion of the unbalance absorption capacity of the

    power system. The International Electrotechnical Commission

    Report IEC/TR 61000-3-13:2008 prescribes a VU emission allocation

    methodology establishing the fact that the VU can arise

    at the point of common connection (PCC) due to upstream network

    unbalance and load unbalance. Although this is the case

    for emission allocation, approaches for post connection emission

    assessment do not exist except for cases where the load is the

    only contributor to the VU at the PCC. Such assessment methods

    require separation of the post connection VU emission level into

    its constituent parts. In developing suitable methodologies for this

    purpose, the pre and postconnection data requirements need to be

    given due consideration to ensure that such data can be easily established.

    This paper presents systematic, theoretical bases which

    can be used to assess the individual VU emission contributions

    made by the upstream source, asymmetrical line, and the load

    for a radial power system. The methodology covers different load

    configurations including induction motors. Assessments obtained

    by employing the theoretical bases on the study system were

    verified by using unbalanced load-flow analysis in MATLAB and

    using DIgSILENT PowerFactory software.

Authors


  •   Jayatunga, Upuli (external author)
  •   Perera, Sarath
  •   Ciufo, Phil (external author)

Publication Date


  • 2012

Citation


  • U. Jayatunga, S. Perera & P. Ciufo, "Voltage unbalance emission assessment in radial power systems," IEEE Transactions on Power Delivery, vol. 27, (3) pp. 1653-1661, 2012.

Ro Metadata Url


  • http://ro.uow.edu.au/infopapers/2197

Number Of Pages


  • 8

Start Page


  • 1653

End Page


  • 1661

Volume


  • 27

Issue


  • 3