Network Resource
Interconnection Service
September 12, 2013
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MISO Process
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Presentation Purpose
• Presentation given at the request of
stakeholders during the last meeting
• Purpose is to explain why MISO uses the
deliverability methodology
– MISO adapted the methodology from the one
PJM uses for the same purposes
– MISO’s belief and experience shows this method
superior to an increment/decrement methodology
– MISO’s belief is that the increment/decrement
methodology artificially limits commerce to the
detriment of the ratepayer
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Drivers of Deliverability Methodology
Order 2003
• Created Network Resource Interconnection Service
Product
• Drove MISO to review how new gens were studied
Energy Market
• Complete paradigm shift away from bilateral service
requests and scheduling
• Needed study methods to reflect the new tariff
Ancillary Serv.
Market
• Consolidated the Balancing Authorities
• Dispatch as one fleet, need study method alignment
Resource
Adequacy
• Deliverability now key to capacity construct
• Test for universal deliverability key to making zonal
construct work
Deliverability Concepts ….
Deliverability Testing:
• Study technique to examine ability of generation in
aggregate, to serve load in aggregate
• Tests non-dispatched generation without building multiple
cases
• Determines individual generator’s ability to contribute to
aggregate service
• Pre-certifies generator for designation by a network load
Deliverability Testing DOES NOT:
•
•
•
•
•
Provide firm transmission service
Create new transmission capability without upgrades
Take away firm service already granted
Influence Real-Time market dispatch
Absolve any load serving responsibilities
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Deliverability Concepts Applied to Resource
Adequacy and Planning
• Generators generally have to be
deliverable to the whole footprint
to be a capacity resource
• Location of deliverable
generators counted on for
capacity is dependent on 3 major
values:
• Zonal Import Limit
• Zonal Export Limit
• Local Clearing Limit
• These limits ensure that we are
not counting on capacity
resources over and above what
the transmission system can
handle
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Basic Deliverability Concepts …
Load Deliverability
Generator Deliverability
Generation can
get out of the
local area at a
time of need
Generation can
get into the local
area at a time of
need
Generator
Load
Load
reliability
Assessment
Generator
Interconnection
Studies
All other
studies
Reliable
System
Differences Between Tradition and Deliverability
Algorithms …
• Deliverability algorithm ensures generation can operate
at maximum capability without being “bottled up”
Traditional
• Set up a handful of base cases
• Determine flow on the transmission elements
• System intact
• Selected contingencies
• Assess change in flow from the proposed transfer
Deliverability
• Set up one base case
• Determine flow on transmission elements
• System intact
• Selected contingencies
• Determine the flow on transmission elements from undispatched generation
• Find pockets of constrained generation
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SPP Process
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Generator Interconnection Studies
• No deliverability of energy implied in the
Generator Interconnection Process
• Generators must go through the
Transmission Service Process to be
designated as a Resource
• Network Resource Interconnection Service
is available, but grants no deliverability.
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Generator Interconnection Studies
• Source –
– Generator being studied
• Sink –
– ERIS – entire SPP footprint
– NRIS – Host Transmission Owner System
• Constraints Identified for Transmission
Reinforcement
– ERIS – overloads with 20% sensitivity factor
– NRIS – overloads with 3% sensitivity factor
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Transmission Service – Designation of a
Network Resource
• Source –
– Resource being studied
• Sink –
– Network Customer’s Network Load
• Constraints Identified for Transmission
Reinforcement
– overloads with 3% sensitivity factor
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