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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

Load Power Factor Audit Results and Updated LPF Standards

Prepared by ISO-New England

August 30, 2005


Objective
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
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)



Reasons for updating minimum maximum allowable lpf values
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 Connecticut (Excluding SWCT)





    Annual load power factor survey
    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 survey1
    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








    THANK YOU !!! Light Load by TO/ Area


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