NAESB Time and Inadvertent Management Business Practice Update (TIMBP)

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NAESB Time and Inadvertent Management Business
Practice Update(TIMBP)

• August 20, 2009
• Terry Bilke

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Introduction

• Intended to be a very targeted business practice
  to address multiple concerns in Order No. 693
• Originally submitted to NERC, NERC Staff and
  Standards Committee rejected the SAR saying Time
  Error Corrections (TEC) and Inadvertent Payback
  are NAESBs purview
• Relied on proven Time and Inadvertent management
  practices, comparable to the WECC automatic TEC
• No ERCOT/WECC impact unless they so choose

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FERCs Order No. 693 Concerns

• Address number and efficiency of TECs
• Concerned with frequency excursions (nearly half
  of reported frequency excursions occurred during
  TEC even though the East is in TEC 15 of the
  time)
• Wants NERC to reduce and penalize large
  Inadvertent balances
• Asks NERC to investigate alternatives to present
  TEC practices

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EI TEC Summary 2002 2009
Present Payback Method
Old Payback Method
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Old Unilateral Payback was the Cornerstone

• Unilateral Payback Option 2 gt
  Average Frequency closer to 60 Hz gt Less
  Inadvertent passing around gt
• Smaller Inadvertent Balances
• Average Frequency closer to 60 Hz gt
• Fewer TECsgt
  Fewer Frequency Excursions
• This Payback Option was rejected by the EC

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Recent Items

• NERC BAC Team met with the FERC
• FERC Staff appears to be open to alternatives to
  the Order No. 693 concerns that led to the TIMBP
• This may mitigate the need for the last draft TIM
  business practice
• TIMTF created a tracking matrix that both teams
  update
• TIMTF is participating in BAC Team calls
• As the BAC Team proposes changes to BAL-002,
  BAL-004, BAL-005, BAL-006 table is updated
• TIMTF evaluates whether a complementary business
  practice is needed

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Potential Issue

• NERC BAC may do field tests that interface with
  NAESB business practices
• No NAESB process for field tests
• Field test may cause a deviation of NAESB
  business practices (that are generally part of
  transmission providers tariffs)
• There will likely be other similar situations in
  the future, looking for EC guidance