W E S T E R N E L E C T R I C I T Y C O O R D I N A T I N G C OU N C I L

Next-day Study Task ForceSteve Ashbaker

Director Event Analysis & Situational Awareness

Jason Ausmus

NDSTF Chair

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September 8, 2011 SW Joint FERC/NERC Report Activity

• Why are we here today? Joint FERC/NERC Report Recommendations and Activities (O&P #2 – NDS)

I. Failure to Conduct and Share Next-Day Studies

II. Lack of Updated External Networks in Next-Day Study Models

III. Sub-100 kV Facilities Not Adequately Considered in Next-Day Studies

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NDS Task Force

• NDS Task Force created– WECC TOPs– Representatives from WECC Sub-

regional Study Groups– Peak RC

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Next-day Study Guideline

• NDS Guideline posted for comment – February 4-18

• NDSTF consider and incorporated comments• February 24 WECC posted the NDS Guideline

for 30 day OC approval– March 25-26 Operating Committee Meeting

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NDSTF Leadership

• Staff Liaison – Steve Ashbaker/WECC• Chair – Jason Ausmus/Peak RC• Vice Chair – Phillip Shafeei/Colorado Springs

Utilities

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NDSTF – Entities Represented

• Total of 35 entities on NDSTF roster

AESO APS Avista BC HydroBPA CAISO CFE Chelan PUDTacoma Power Colorado Springs El Paso Electric Grant Co PUDIdaho Power IID IREA LADWPMID Nevada Power PacifiCorp Peak RCPG&E PNM Pend Oreille PUD PRPAPuget Sound SCE SDG&E SMUDSRP TEP TSGT WAPA – WACM

WAPA – WALC WECC Xcel CSU

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NDSTF Timeline

• February-March 2014 NDS Strategy Document drafted• Face-to-face kickoff meetings held March 31-April 1st

2014

– 5 additional face-to-face meetings would follow– These Meetings served as “brainstorming” sessions for the

work identified items• Bi-weekly webinars April 2014 through Mid-Jan 2015• Industry webinar seeking comments completed Feb 9,

2015

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NDS Strategy – Work Items

I. What Near-Term Studies Need to Accomplish

II. Types of Input Data to the Near-term Study Process

III. Performing the Near-term Studies

IV. Sharing and Coordinating Study Results and Operational Plans

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Work Item 1 - What Near-Term Studies Need to Accomplish

• Near-term = Same-day + Next-day• Near-term Studies are a process• The process is iterative

– Studies are performed in advance of Real-time– System is dynamic; Input data changes often– Process must be flexible enough to consider input

data changes• Near-term studies ideally become more

accurate with each iteration

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Work Item 1 and RC Data Request

• In order to support an iterative study process, RC has revised the data request– Planned Outage and Load Forecast– 4 business days vs. 1 business day

• Concepts in the white paper will drive future RC Data Request changes

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Work Item 2 – Input Data for Near-term Studies

• Input data brainstorming session had a very common theme…need to address COS!

• COS is the common outage tool of the interconnection

• Problems noted:– COS labels unclear and inconsistent– Interpreting outage isolation is difficult– COS mostly a one-way tool

• Data is sent to it, but not many extract data out of it

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Work Item 2 – COS Outage Manual

• To address previously stated issues, group put together the Coordinated Outage System (COS) Outage Manual

• Introduces the following concepts:– Switching point outage data submission– Outage End-State, i.e. state in which switching is

complete and work is ready to begin

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Work Item 2 – COS Outage Manual Example

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Work Item 2 – COS Outage Manual Example

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Work Item 2 – COS Outage Manual

• COS Outage Manual is essentially the end state of the outage submission process– Needed to be done first

• COS Data Dictionary will need to be trued up to accommodate necessary switching points– Peak effort underway internally; external outreach

coming soon• Manual eventually a part of the COS User

Guide which RC Data Request will point to

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Other Input Items

• Load Forecast, Generation Unit Forecast, Net Interchange– NDSTF created initial definition of each

• RC has begun internal effort to refine these items– Some data request changes already made to support

iterative study process• Input Data Benchmarking

– Develop awareness and best practices of Good vs Bad data

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Work Item 3 – Performing the Near-term Studies

• Focus on steady-state analysis (pre- and post-contingency) study results

• Study Criteria– Points to RC’s SOL Methodology

• Study Results Validation– Important step in interpreting study results– Techniques describes on how to troubleshoot– Essentially another round of Input Data

Benchmarking!

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Work Item 4 - Sharing and Coordinating Study Results and Operational Plans

• Group decided most immediate impact was to focus on more “significant” system issues

• Using Peak’s Operating Memos, the group created the Outage Operating Memo template

• Outage Operating Memo is outage based– Template created from Peak’s original document

and modified by NDSTF– Guidelines document created to indicate the need,

responsibilities and coordination

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Work Item 4 – Outage Operating Memo Guidelines

• Document covers: Purpose, Description, Responsibility, Significant Impact Criteria, Timelines, Review, Distribution

• Goal is to have the guidelines document and template place on PeakRC.org

• Every entity will have a folder, similar to entity studies area

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Work Item 4 – Outage Operating Memo Template

• Sample Outage Operating Memo Template

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Next Steps

MotionThe Operating Committee approves the NDS Guideline & Operating Outage Memo Template as recommended by the NDS Task Force• NDS TF proposes the creation of a NDS Work

Group reporting to the Operating Committee– Monitor NDS Practices– Identify NDS Best Practices & Gaps in the process

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Q&A Session

Questions and/or comments??

Additional question or comments, please send to Ashbaker@wecc.biz