Load power factor audit results and updated lpf standards
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Load Power Factor Audit Results and Updated LPF Standards PowerPoint PPT Presentation


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Load Power Factor Audit Results and Updated LPF Standards. Prepared by ISO-New England August 30, 2005. Objective. To describe the changes on the LPF standards for:Connecticut, Southeast NE, Boston and Vermont for the year 2006.

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Load Power Factor Audit Results and Updated LPF Standards

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Load Power Factor Audit Results and Updated LPF Standards

Prepared by ISO-New England

August 30, 2005


Objective

  • To describe the changes on the LPF standards for:Connecticut, Southeast NE, Boston and Vermont for the year 2006.

  • To report the findings of the LPF audit conducted by the ISO for the year 2004-2005 and;

  • To report Participants’ future reactive targets based on the 2006 LPF standards.


Review of Load Power Factor Correction Program

  • Ten LPF areas are defined based on

    • Reactive characteristics and performance.

    • Current Interfaces

    • TO boundary

  • Areas review on an annual basis by VTF.

  • Each Area is assessed individually to assess its own reactive needs.

    • Voltage Reactive Performance (OP-17)

    • Net Zero MVAR Interchange (OP-17)


Graphical Representation of the 10 LPF Areas


Reasons for Updating Minimum / Maximum Allowable LPF Values

  • Changes in area reactive performance due to

    transmission changes.

    • Series reactors

    • Transformers

    • Charging

  • Changes in current reactive values (Qmax, Qmin) for key units.

  • Changes in area transfers.

  • Additional static or dynamic reactive compensation.


  • 2006 ISO Load Power Factor Standards Connecticut (Excluding SWCT)


    2006 ISO Load Power Factor Standards Southeast N.E


    2006 ISO Load Power Factor Standards Vermont


    2006 ISO Load Power Factor Standards Boston


    Annual Load Power Factor Survey

    • ISO-NE is responsible for

      • Conducting the annual LPF survey

      • Evaluating and reporting results

      • Requesting and obtaining any warranted remedial action plans from Participants

    • Specific historical hours are selected and actual LPF operation is surveyed on a Participant basis

    • Evaluation is done by comparing the Participant’s actual LPFs to the corresponding area’s allowable LPFs for the given load levels

    • The degree of noncompliance by each Participant is quantified in terms of surplus or shortfall of reactive capability


    Annual Load Power Factor Survey

    • Note that two sets of area LPF standards (graphs) must be maintained

      • One set that is applicable to past year which is being surveyed and assessed

      • A second set that applies to the next year and is used to determine how much remedial action is needed to meet future LPF standards

      • Next year’s standards automatically become the past year’s standards


    2004-05 ISO Load Power Factor Audit Results New Hampshire


    2004-05 ISO Load Power Factor Audit ResultsMaine


    2004-05 ISO Load Power Factor Audit Results Southeast N.E


    2004-05 Load Power Factor Audit ResultsBoston


    2006 Reactive Changes Needed to Meet Area Minimum LPFs for Peak Load by TO / Area

    * Preliminary


    2006 Reactive Changes Needed to Meet Area Maximum LPFs for Light Load by TO/ Area


    THANK YOU !!!


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