Transcript MSRATF Update to TSS, August 2014

MSRATF Update to TSS
(Modeling SPS and RAS Ad Hoc Task Force)
Activities
August, 2014
Joe Seabrook
Puget Sound Energy, Inc.
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MSRATF Guiding Principles
♣ Transparency on transmission reliability matters
Transparency Between Systems
♣ Existing and future facilities modeled in WECC
planning cases will include Relays, RAS,
Contingency Definitions, Node-Breaker
Topology, and Sequence Components
• Needed to evaluate existing and planned facilities
• Assumptions can be made for future facilities
♣ This data will be provided and maintained by
the sanctionable entity; TO, TP, PC, TOP
♣ Include the means to exchange this data
between simulation programs
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RAS Subgroup
Thong Trinh
• Generic RAS model - common format
– Implemented in PowerWorld last fall
– GE/WECC contract to implement in 3 phases
• To provide Phase 1 by the end of the 2014 (RAS)
– Seeking funding for Siemens-PTI work
• Would take Siemens-PTI about 6 months
– Thong and Eleanor Ewry have completed
testing the PowerWorld implementation
• PowerWorld is developing an improvement that will
be a change in the specification
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RAS Subgroup
Others
• TSS is requesting members to provide their RAS
descriptions and models - Tracy
• Colstrip Northwest Energy sent a draft ATR
specification to the vendors to evaluate
• PAC is developing Bridger RAS model with
WECC common format in PowerWorld
• BC Hydro is working with PowerWorld to
evaluate using the WECC common format
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Relays Subgroup
Amos Ang
• Differential relay model specification
– Specification approved by MVWG in June
– Is triggered off the contingency description,
not unbalanced line flows
– Node Breaker is required for bus differential
TSS Motion: Approve Differential Relay
Specification (include Ignore switch).
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Relays Subgroup
Amos Ang
• Amos discussed generic generator relay
models at MVWG
– Would develop a generic specification for
GP1 and GP2, with improvements to GP2
• Want to validate distance relays with a test
case
• Zero sequence relays
– Inverse time directional over-current
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Node Breaker Subgroup
Jonathan Young
• Paper on “Reconciliation of BCCS and
WSM with Integrative Node-Breaker
Method”
– Obtained MSRATF consensus approval
– Seeking TSS approval by email in November
• Facility owners model and maintain their
own equipment (sanctionable entity)
– TO, GO, TOP, TP, PC
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Node Breaker Subgroup
Jonathan Young
• Buses are called Topological Nodes
Called “subnet” objects in PowerWorld
• Connections of branches are called Connectivity Nodes
– A Connectivity Node can belong to 0 or 1 Topological Node
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Node Breaker Subgroup
Jonathan Young
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Modeling Unbalanced Networks
• Motion passed to include unbalanced sequence
network data in WECC base cases.
– SRWG has been asked to develop a plan to include
the sequence data in base cases
•
Should we do a workshop to gather and maintain sequence
and relay data with automated means.
– Explanation of No votes was distributed to
TSS by e-mail from PAC, BPA & TSG.
•
Follow up discussion was via email
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